[GitHub] [dolphinscheduler] ruanwenjun commented on a diff in pull request #10689: [Feature-10683][Task Plugin] Add Java Task Plugin.

[GitBox <gi...@apache.org>]

ruanwenjun commented on code in PR #10689:
URL: https://github.com/apache/dolphinscheduler/pull/10689#discussion_r945295271


##########
dolphinscheduler-task-plugin/dolphinscheduler-task-java/src/main/java/org/apache/dolphinscheduler/plugin/task/java/JavaConstants.java:
##########
@@ -0,0 +1,67 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.dolphinscheduler.plugin.task.java;
+
+public class JavaConstants {
+
+    private JavaConstants() {
+        throw new IllegalStateException("Utility class");
+    }
+
+    /**
+     * The constants used to get the Java installation directory
+     **/
+    public static final String JAVA_HOME_VAR = "${JAVA_HOME}";
+
+    /**
+     * this constant represents the use of the java command to run a task
+     **/
+    public static final String RUN_TYPE_JAVA = "JAVA";
+
+    /**
+     * this constant represents the use of the java -jar command to run a task
+     **/
+    public static final String RUN_TYPE_JAR = "JAR";
+
+    /**
+     * This constant is the Classpath or module path delimiter for different operating systems
+     **/
+    public static final String PATH_SEPARATOR = System.getProperty("path.separator");

Review Comment:
   Why you don't directly use `File.pathSeparatorChar`



##########
dolphinscheduler-task-plugin/dolphinscheduler-task-java/src/main/java/org/apache/dolphinscheduler/plugin/task/java/JavaConstants.java:
##########
@@ -0,0 +1,67 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.dolphinscheduler.plugin.task.java;
+
+public class JavaConstants {
+
+    private JavaConstants() {
+        throw new IllegalStateException("Utility class");
+    }
+
+    /**
+     * The constants used to get the Java installation directory
+     **/
+    public static final String JAVA_HOME_VAR = "${JAVA_HOME}";
+
+    /**
+     * this constant represents the use of the java command to run a task
+     **/
+    public static final String RUN_TYPE_JAVA = "JAVA";
+
+    /**
+     * this constant represents the use of the java -jar command to run a task
+     **/
+    public static final String RUN_TYPE_JAR = "JAR";
+
+    /**
+     * This constant is the Classpath or module path delimiter for different operating systems
+     **/
+    public static final String PATH_SEPARATOR = System.getProperty("path.separator");
+
+    /**
+     * This constant is the file delimiter for different operating systems
+     **/
+    public static final String FILE_SEPARATOR = System.getProperty("file.separator");

Review Comment:
   Why you don't directly use `File.separator`



##########
dolphinscheduler-task-plugin/dolphinscheduler-task-java/src/main/java/org/apache/dolphinscheduler/plugin/task/java/JavaParameters.java:
##########
@@ -0,0 +1,83 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.dolphinscheduler.plugin.task.java;
+
+import org.apache.dolphinscheduler.plugin.task.api.model.ResourceInfo;
+import org.apache.dolphinscheduler.plugin.task.api.parameters.AbstractParameters;
+
+import java.util.List;
+
+import lombok.Data;
+
+@Data
+public class JavaParameters extends AbstractParameters {
+    /**
+     * origin java script
+     */
+    private String rawScript;
+
+    /**
+     * run in jar file
+     */
+    private ResourceInfo mainJar;
+
+    /**
+     * Marks the current task running mode
+     */
+    private String runType;
+
+    /**
+     * main method args
+     **/
+    private String mainArgs;
+
+    /**
+     * java virtual machine args
+     **/
+    private String jvmArgs;
+
+    /**
+     * module path or class path flag
+     **/
+    private boolean isModulePath;
+
+    /**
+     * resource list
+     */
+    private List<ResourceInfo> resourceList;
+
+    /**
+     * @description: Check that the parameters are valid
+     * @param: []
+     * @return: boolean
+     **/
+    @Override
+    public boolean checkParameters() {
+        return runType != null && (rawScript != null && !rawScript.isEmpty()) || mainJar != null;

Review Comment:
   ```suggestion
           return runType != null && StringUtils.isNotEmpty(rawScript) || mainJar != null;
   ```



##########
dolphinscheduler-task-plugin/dolphinscheduler-task-java/src/main/java/org/apache/dolphinscheduler/plugin/task/java/JavaTask.java:
##########
@@ -0,0 +1,422 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.dolphinscheduler.plugin.task.java;
+
+import static org.apache.dolphinscheduler.plugin.task.api.TaskConstants.SINGLE_SLASH;
+import static org.apache.dolphinscheduler.plugin.task.java.JavaConstants.JAVA_HOME_VAR;
+import static org.apache.dolphinscheduler.plugin.task.java.JavaConstants.PUBLIC_CLASS_NAME_REGEX;
+
+
+import org.apache.dolphinscheduler.plugin.task.api.AbstractTaskExecutor;
+import org.apache.dolphinscheduler.plugin.task.api.ShellCommandExecutor;
+import org.apache.dolphinscheduler.plugin.task.api.TaskConstants;
+import org.apache.dolphinscheduler.plugin.task.api.TaskException;
+import org.apache.dolphinscheduler.plugin.task.api.TaskExecutionContext;
+import org.apache.dolphinscheduler.plugin.task.api.model.Property;
+import org.apache.dolphinscheduler.plugin.task.api.model.ResourceInfo;
+import org.apache.dolphinscheduler.plugin.task.api.model.TaskResponse;
+import org.apache.dolphinscheduler.plugin.task.api.parameters.AbstractParameters;
+import org.apache.dolphinscheduler.plugin.task.api.parser.ParamUtils;
+import org.apache.dolphinscheduler.plugin.task.api.parser.ParameterUtils;
+import org.apache.dolphinscheduler.plugin.task.api.utils.MapUtils;
+import org.apache.dolphinscheduler.plugin.task.java.exception.JavaSourceFileExistException;
+import org.apache.dolphinscheduler.plugin.task.java.exception.PublicClassNotFoundException;
+import org.apache.dolphinscheduler.plugin.task.java.exception.RunTypeNotFoundException;
+import org.apache.dolphinscheduler.spi.utils.JSONUtils;
+
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.lang3.SystemUtils;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import com.google.common.base.Preconditions;
+
+/**
+ * java task
+ */
+public class JavaTask extends AbstractTaskExecutor {
+
+    /**
+     * Contains various parameters for this task
+     */
+    private JavaParameters javaParameters;
+
+    /**
+     * To run shell commands
+     */
+    private ShellCommandExecutor shellCommandExecutor;
+
+    /**
+     * task execution context
+     */
+    private TaskExecutionContext taskRequest;
+
+    /**
+     * class name regex pattern
+     */
+    private static final Pattern classNamePattern = Pattern.compile(PUBLIC_CLASS_NAME_REGEX);
+
+    /**
+     * @description: Construct a Java task
+     * @param: [org.apache.dolphinscheduler.plugin.task.api.TaskExecutionContext]
+     * @return: JavaTask
+     **/
+    public JavaTask(TaskExecutionContext taskRequest) {
+        super(taskRequest);
+        this.taskRequest = taskRequest;
+        this.shellCommandExecutor = new ShellCommandExecutor(this::logHandle,
+                taskRequest,
+                logger);
+    }
+
+    /**
+     * @description: Initializes a Java task
+     * @param: []
+     * @return: void
+     **/
+    @Override
+    public void init() {
+        logger.info("java task params {}", taskRequest.getTaskParams());
+        javaParameters = JSONUtils.parseObject(taskRequest.getTaskParams(), JavaParameters.class);
+        if (javaParameters == null || !javaParameters.checkParameters()) {
+            throw new TaskException("java task params is not valid");
+        }
+        if (javaParameters.getRunType().equals(JavaConstants.RUN_TYPE_JAR)) {
+            setMainJarName();
+        }
+    }
+
+    /**
+     * @description: Gets the Java source file that was initially processed
+     * @param: []
+     * @return: java.lang.String
+     **/
+    @Override
+    public String getPreScript() {
+        String rawJavaScript = javaParameters.getRawScript().replaceAll("\\r\\n", "\n");
+        try {
+            rawJavaScript = convertJavaSourceCodePlaceholders(rawJavaScript);
+        } catch (StringIndexOutOfBoundsException e) {
+            logger.error("setShareVar field format error, raw java script : {}", rawJavaScript);
+        }
+        return rawJavaScript;
+    }
+
+    /**
+     * @description: Execute Java tasks
+     * @param: []
+     * @return: void
+     **/
+    @Override
+    public void handle() throws Exception {
+        try {
+            // Step 1: judge if is java or jar run type.
+            // Step 2 case1: The jar run type builds the command directly, adding resource to the java -jar class when building the command
+            // Step 2 case2: The java run type, first replace the custom parameters, then compile the code, and then build the command will add resource
+            // Step 3: To run the command
+            String command = null;
+            switch (javaParameters.getRunType()) {
+                case JavaConstants.RUN_TYPE_JAVA:
+                    command = buildJavaCommand();
+                    break;
+                case JavaConstants.RUN_TYPE_JAR:
+                    command = buildJarCommand();
+                    break;
+                default:
+                    throw new RunTypeNotFoundException("run type is required, but it is null now.");

Review Comment:
   Why you don't put this in `javaParameters.checkParameters()`



##########
dolphinscheduler-task-plugin/dolphinscheduler-task-java/src/main/java/org/apache/dolphinscheduler/plugin/task/java/JavaTask.java:
##########
@@ -0,0 +1,422 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.dolphinscheduler.plugin.task.java;
+
+import static org.apache.dolphinscheduler.plugin.task.api.TaskConstants.SINGLE_SLASH;
+import static org.apache.dolphinscheduler.plugin.task.java.JavaConstants.JAVA_HOME_VAR;
+import static org.apache.dolphinscheduler.plugin.task.java.JavaConstants.PUBLIC_CLASS_NAME_REGEX;
+
+
+import org.apache.dolphinscheduler.plugin.task.api.AbstractTaskExecutor;
+import org.apache.dolphinscheduler.plugin.task.api.ShellCommandExecutor;
+import org.apache.dolphinscheduler.plugin.task.api.TaskConstants;
+import org.apache.dolphinscheduler.plugin.task.api.TaskException;
+import org.apache.dolphinscheduler.plugin.task.api.TaskExecutionContext;
+import org.apache.dolphinscheduler.plugin.task.api.model.Property;
+import org.apache.dolphinscheduler.plugin.task.api.model.ResourceInfo;
+import org.apache.dolphinscheduler.plugin.task.api.model.TaskResponse;
+import org.apache.dolphinscheduler.plugin.task.api.parameters.AbstractParameters;
+import org.apache.dolphinscheduler.plugin.task.api.parser.ParamUtils;
+import org.apache.dolphinscheduler.plugin.task.api.parser.ParameterUtils;
+import org.apache.dolphinscheduler.plugin.task.api.utils.MapUtils;
+import org.apache.dolphinscheduler.plugin.task.java.exception.JavaSourceFileExistException;
+import org.apache.dolphinscheduler.plugin.task.java.exception.PublicClassNotFoundException;
+import org.apache.dolphinscheduler.plugin.task.java.exception.RunTypeNotFoundException;
+import org.apache.dolphinscheduler.spi.utils.JSONUtils;
+
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.lang3.SystemUtils;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import com.google.common.base.Preconditions;
+
+/**
+ * java task
+ */
+public class JavaTask extends AbstractTaskExecutor {
+
+    /**
+     * Contains various parameters for this task
+     */
+    private JavaParameters javaParameters;
+
+    /**
+     * To run shell commands
+     */
+    private ShellCommandExecutor shellCommandExecutor;
+
+    /**
+     * task execution context
+     */
+    private TaskExecutionContext taskRequest;
+
+    /**
+     * class name regex pattern
+     */
+    private static final Pattern classNamePattern = Pattern.compile(PUBLIC_CLASS_NAME_REGEX);
+
+    /**
+     * @description: Construct a Java task
+     * @param: [org.apache.dolphinscheduler.plugin.task.api.TaskExecutionContext]
+     * @return: JavaTask
+     **/
+    public JavaTask(TaskExecutionContext taskRequest) {
+        super(taskRequest);
+        this.taskRequest = taskRequest;
+        this.shellCommandExecutor = new ShellCommandExecutor(this::logHandle,
+                taskRequest,
+                logger);
+    }
+
+    /**
+     * @description: Initializes a Java task
+     * @param: []
+     * @return: void
+     **/
+    @Override
+    public void init() {
+        logger.info("java task params {}", taskRequest.getTaskParams());
+        javaParameters = JSONUtils.parseObject(taskRequest.getTaskParams(), JavaParameters.class);
+        if (javaParameters == null || !javaParameters.checkParameters()) {
+            throw new TaskException("java task params is not valid");
+        }
+        if (javaParameters.getRunType().equals(JavaConstants.RUN_TYPE_JAR)) {
+            setMainJarName();
+        }
+    }
+
+    /**
+     * @description: Gets the Java source file that was initially processed
+     * @param: []
+     * @return: java.lang.String
+     **/
+    @Override
+    public String getPreScript() {
+        String rawJavaScript = javaParameters.getRawScript().replaceAll("\\r\\n", "\n");
+        try {
+            rawJavaScript = convertJavaSourceCodePlaceholders(rawJavaScript);
+        } catch (StringIndexOutOfBoundsException e) {
+            logger.error("setShareVar field format error, raw java script : {}", rawJavaScript);
+        }
+        return rawJavaScript;
+    }
+
+    /**
+     * @description: Execute Java tasks
+     * @param: []
+     * @return: void
+     **/
+    @Override
+    public void handle() throws Exception {
+        try {
+            // Step 1: judge if is java or jar run type.
+            // Step 2 case1: The jar run type builds the command directly, adding resource to the java -jar class when building the command
+            // Step 2 case2: The java run type, first replace the custom parameters, then compile the code, and then build the command will add resource
+            // Step 3: To run the command
+            String command = null;
+            switch (javaParameters.getRunType()) {
+                case JavaConstants.RUN_TYPE_JAVA:
+                    command = buildJavaCommand();
+                    break;
+                case JavaConstants.RUN_TYPE_JAR:
+                    command = buildJarCommand();
+                    break;
+                default:
+                    throw new RunTypeNotFoundException("run type is required, but it is null now.");
+            }
+            Preconditions.checkNotNull(command, "command not be null.");
+            TaskResponse taskResponse = shellCommandExecutor.run(command);
+            logger.info("java task run result : {}", taskResponse);
+            setExitStatusCode(taskResponse.getExitStatusCode());
+            setAppIds(taskResponse.getAppIds());
+            setProcessId(taskResponse.getProcessId());
+            setVarPool(shellCommandExecutor.getVarPool());
+        } catch (InterruptedException e) {
+            logger.error("java task interrupted ", e);
+            setExitStatusCode(TaskConstants.EXIT_CODE_FAILURE);
+            Thread.currentThread().interrupt();
+        } catch (RunTypeNotFoundException e) {
+            logger.error(e.getMessage());
+            setExitStatusCode(TaskConstants.EXIT_CODE_FAILURE);
+            throw e;
+        } catch (Exception e) {
+            logger.error("java task failed ", e);
+            setExitStatusCode(TaskConstants.EXIT_CODE_FAILURE);
+            throw new TaskException("run java task error", e);
+        }
+    }
+
+    /**
+     * @description: Construct a shell command for the java Run mode
+     * @param: []
+     * @return: java.lang.String
+     **/
+    protected String buildJavaCommand() throws Exception {
+        String sourceCode = buildJavaSourceContent();
+        String className = compilerRawScript(sourceCode);
+        StringBuilder builder = new StringBuilder();
+        builder.append(getJavaCommandPath())
+                .append("java").append(" ")
+                .append(buildResourcePath())
+                .append(" ")
+                .append(className).append(" ")
+                .append(javaParameters.getMainArgs().trim()).append(" ")
+                .append(javaParameters.getJvmArgs().trim());
+        return builder.toString();
+    }
+
+    private void setMainJarName() {
+        ResourceInfo mainJar = javaParameters.getMainJar();
+        String resourceName = getResourceNameOfMainJar(mainJar);
+        mainJar.setRes(resourceName);
+        javaParameters.setMainJar(mainJar);
+    }
+
+    /**
+     * @description: Construct a shell command for the java -jar Run mode
+     * @param: []
+     * @return: java.lang.String
+     **/
+    protected String buildJarCommand() {
+        String fullName = javaParameters.getMainJar().getResourceName();
+        String mainJarName = fullName.substring(0, fullName.lastIndexOf('.'));
+        mainJarName = mainJarName.substring(mainJarName.lastIndexOf('.') + 1) + ".jar";
+        StringBuilder builder = new StringBuilder();
+        builder.append(getJavaCommandPath())
+                .append("java").append(" ")
+                .append(buildResourcePath()).append(" ")
+                .append("-jar").append(" ")
+                .append(taskRequest.getExecutePath())
+                .append(mainJarName).append(" ")
+                .append(javaParameters.getMainArgs().trim()).append(" ")
+                .append(javaParameters.getJvmArgs().trim());
+        return builder.toString();
+    }
+
+    private String getResourceNameOfMainJar(ResourceInfo mainJar) {
+        if (null == mainJar) {
+            throw new RuntimeException("The jar for the task is required.");
+        }
+        return mainJar.getId() == 0
+                ? mainJar.getRes()
+                // when update resource maybe has error
+                : mainJar.getResourceName().replaceFirst(SINGLE_SLASH, "");
+    }
+
+    @Override
+    public void cancelApplication(boolean cancelApplication) throws Exception {
+        // cancel process
+        shellCommandExecutor.cancelApplication();
+    }
+
+    @Override
+    public AbstractParameters getParameters() {
+        return javaParameters;
+    }
+
+    /**
+     * @description: Replaces placeholders such as local variables in source files
+     * @param: [java.lang.String]
+     * @return: java.lang.String
+     **/
+    protected static String convertJavaSourceCodePlaceholders(String rawScript) throws StringIndexOutOfBoundsException {
+        int len = "${setShareVar(${".length();
+        int scriptStart = 0;
+        while ((scriptStart = rawScript.indexOf("${setShareVar(${", scriptStart)) != -1) {
+            int start = -1;
+            int end = rawScript.indexOf('}', scriptStart + len);
+            String prop = rawScript.substring(scriptStart + len, end);
+
+            start = rawScript.indexOf(',', end);
+            end = rawScript.indexOf(')', start);
+
+            String value = rawScript.substring(start + 1, end);
+
+            start = rawScript.indexOf('}', start) + 1;
+            end = rawScript.length();
+
+            String replaceScript = String.format("print(\"${{setValue({},{})}}\".format(\"%s\",%s))", prop, value);
+
+            rawScript = rawScript.substring(0, scriptStart) + replaceScript + rawScript.substring(start, end);
+
+            scriptStart += replaceScript.length();
+        }
+        return rawScript;
+    }
+
+    /**
+     * @description: Creates a Java source file when it does not exist
+     * @param: [java.lang.String, java.lang.String]
+     * @return: java.lang.String
+     **/
+    protected void createJavaSourceFileIfNotExists(String sourceCode, String fileName) throws IOException {
+        logger.info("tenantCode: {}, task dir:{}", taskRequest.getTenantCode(), taskRequest.getExecutePath());
+
+        if (!Files.exists(Paths.get(fileName))) {
+            logger.info("generate java source file: {}", fileName);
+
+            StringBuilder sb = new StringBuilder();
+            sb.append(sourceCode);
+            logger.info(sb.toString());
+
+            // write data to file
+            FileUtils.writeStringToFile(new File(fileName),
+                    sb.toString(),
+                    StandardCharsets.UTF_8);

Review Comment:
   ```suggestion
               logger.info("The java source code", sourceCode);
   
               // write data to file
               FileUtils.writeStringToFile(new File(fileName),
                       sb,
                       StandardCharsets.UTF_8);
   ```
   Why do you use StringBuilder here?



##########
dolphinscheduler-task-plugin/dolphinscheduler-task-java/src/main/java/org/apache/dolphinscheduler/plugin/task/java/JavaTask.java:
##########
@@ -0,0 +1,422 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.dolphinscheduler.plugin.task.java;
+
+import static org.apache.dolphinscheduler.plugin.task.api.TaskConstants.SINGLE_SLASH;
+import static org.apache.dolphinscheduler.plugin.task.java.JavaConstants.JAVA_HOME_VAR;
+import static org.apache.dolphinscheduler.plugin.task.java.JavaConstants.PUBLIC_CLASS_NAME_REGEX;
+
+
+import org.apache.dolphinscheduler.plugin.task.api.AbstractTaskExecutor;
+import org.apache.dolphinscheduler.plugin.task.api.ShellCommandExecutor;
+import org.apache.dolphinscheduler.plugin.task.api.TaskConstants;
+import org.apache.dolphinscheduler.plugin.task.api.TaskException;
+import org.apache.dolphinscheduler.plugin.task.api.TaskExecutionContext;
+import org.apache.dolphinscheduler.plugin.task.api.model.Property;
+import org.apache.dolphinscheduler.plugin.task.api.model.ResourceInfo;
+import org.apache.dolphinscheduler.plugin.task.api.model.TaskResponse;
+import org.apache.dolphinscheduler.plugin.task.api.parameters.AbstractParameters;
+import org.apache.dolphinscheduler.plugin.task.api.parser.ParamUtils;
+import org.apache.dolphinscheduler.plugin.task.api.parser.ParameterUtils;
+import org.apache.dolphinscheduler.plugin.task.api.utils.MapUtils;
+import org.apache.dolphinscheduler.plugin.task.java.exception.JavaSourceFileExistException;
+import org.apache.dolphinscheduler.plugin.task.java.exception.PublicClassNotFoundException;
+import org.apache.dolphinscheduler.plugin.task.java.exception.RunTypeNotFoundException;
+import org.apache.dolphinscheduler.spi.utils.JSONUtils;
+
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.lang3.SystemUtils;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import com.google.common.base.Preconditions;
+
+/**
+ * java task
+ */
+public class JavaTask extends AbstractTaskExecutor {
+
+    /**
+     * Contains various parameters for this task
+     */
+    private JavaParameters javaParameters;
+
+    /**
+     * To run shell commands
+     */
+    private ShellCommandExecutor shellCommandExecutor;
+
+    /**
+     * task execution context
+     */
+    private TaskExecutionContext taskRequest;
+
+    /**
+     * class name regex pattern
+     */
+    private static final Pattern classNamePattern = Pattern.compile(PUBLIC_CLASS_NAME_REGEX);
+
+    /**
+     * @description: Construct a Java task
+     * @param: [org.apache.dolphinscheduler.plugin.task.api.TaskExecutionContext]
+     * @return: JavaTask
+     **/

Review Comment:
   This kind of comment is not needed.



##########
dolphinscheduler-task-plugin/dolphinscheduler-task-java/src/main/java/org/apache/dolphinscheduler/plugin/task/java/JavaTask.java:
##########
@@ -0,0 +1,422 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.dolphinscheduler.plugin.task.java;
+
+import static org.apache.dolphinscheduler.plugin.task.api.TaskConstants.SINGLE_SLASH;
+import static org.apache.dolphinscheduler.plugin.task.java.JavaConstants.JAVA_HOME_VAR;
+import static org.apache.dolphinscheduler.plugin.task.java.JavaConstants.PUBLIC_CLASS_NAME_REGEX;
+
+
+import org.apache.dolphinscheduler.plugin.task.api.AbstractTaskExecutor;
+import org.apache.dolphinscheduler.plugin.task.api.ShellCommandExecutor;
+import org.apache.dolphinscheduler.plugin.task.api.TaskConstants;
+import org.apache.dolphinscheduler.plugin.task.api.TaskException;
+import org.apache.dolphinscheduler.plugin.task.api.TaskExecutionContext;
+import org.apache.dolphinscheduler.plugin.task.api.model.Property;
+import org.apache.dolphinscheduler.plugin.task.api.model.ResourceInfo;
+import org.apache.dolphinscheduler.plugin.task.api.model.TaskResponse;
+import org.apache.dolphinscheduler.plugin.task.api.parameters.AbstractParameters;
+import org.apache.dolphinscheduler.plugin.task.api.parser.ParamUtils;
+import org.apache.dolphinscheduler.plugin.task.api.parser.ParameterUtils;
+import org.apache.dolphinscheduler.plugin.task.api.utils.MapUtils;
+import org.apache.dolphinscheduler.plugin.task.java.exception.JavaSourceFileExistException;
+import org.apache.dolphinscheduler.plugin.task.java.exception.PublicClassNotFoundException;
+import org.apache.dolphinscheduler.plugin.task.java.exception.RunTypeNotFoundException;
+import org.apache.dolphinscheduler.spi.utils.JSONUtils;
+
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.lang3.SystemUtils;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import com.google.common.base.Preconditions;
+
+/**
+ * java task
+ */
+public class JavaTask extends AbstractTaskExecutor {
+
+    /**
+     * Contains various parameters for this task
+     */
+    private JavaParameters javaParameters;
+
+    /**
+     * To run shell commands
+     */
+    private ShellCommandExecutor shellCommandExecutor;
+
+    /**
+     * task execution context
+     */
+    private TaskExecutionContext taskRequest;
+
+    /**
+     * class name regex pattern
+     */
+    private static final Pattern classNamePattern = Pattern.compile(PUBLIC_CLASS_NAME_REGEX);
+
+    /**
+     * @description: Construct a Java task
+     * @param: [org.apache.dolphinscheduler.plugin.task.api.TaskExecutionContext]
+     * @return: JavaTask
+     **/
+    public JavaTask(TaskExecutionContext taskRequest) {
+        super(taskRequest);
+        this.taskRequest = taskRequest;
+        this.shellCommandExecutor = new ShellCommandExecutor(this::logHandle,
+                taskRequest,
+                logger);
+    }
+
+    /**
+     * @description: Initializes a Java task
+     * @param: []
+     * @return: void
+     **/
+    @Override
+    public void init() {
+        logger.info("java task params {}", taskRequest.getTaskParams());
+        javaParameters = JSONUtils.parseObject(taskRequest.getTaskParams(), JavaParameters.class);
+        if (javaParameters == null || !javaParameters.checkParameters()) {
+            throw new TaskException("java task params is not valid");
+        }
+        if (javaParameters.getRunType().equals(JavaConstants.RUN_TYPE_JAR)) {
+            setMainJarName();
+        }
+    }
+
+    /**
+     * @description: Gets the Java source file that was initially processed
+     * @param: []
+     * @return: java.lang.String
+     **/
+    @Override
+    public String getPreScript() {
+        String rawJavaScript = javaParameters.getRawScript().replaceAll("\\r\\n", "\n");
+        try {
+            rawJavaScript = convertJavaSourceCodePlaceholders(rawJavaScript);
+        } catch (StringIndexOutOfBoundsException e) {
+            logger.error("setShareVar field format error, raw java script : {}", rawJavaScript);
+        }
+        return rawJavaScript;
+    }
+
+    /**
+     * @description: Execute Java tasks
+     * @param: []
+     * @return: void
+     **/
+    @Override
+    public void handle() throws Exception {
+        try {
+            // Step 1: judge if is java or jar run type.
+            // Step 2 case1: The jar run type builds the command directly, adding resource to the java -jar class when building the command
+            // Step 2 case2: The java run type, first replace the custom parameters, then compile the code, and then build the command will add resource
+            // Step 3: To run the command
+            String command = null;
+            switch (javaParameters.getRunType()) {
+                case JavaConstants.RUN_TYPE_JAVA:
+                    command = buildJavaCommand();
+                    break;
+                case JavaConstants.RUN_TYPE_JAR:
+                    command = buildJarCommand();
+                    break;
+                default:
+                    throw new RunTypeNotFoundException("run type is required, but it is null now.");
+            }
+            Preconditions.checkNotNull(command, "command not be null.");
+            TaskResponse taskResponse = shellCommandExecutor.run(command);
+            logger.info("java task run result : {}", taskResponse);
+            setExitStatusCode(taskResponse.getExitStatusCode());
+            setAppIds(taskResponse.getAppIds());
+            setProcessId(taskResponse.getProcessId());
+            setVarPool(shellCommandExecutor.getVarPool());
+        } catch (InterruptedException e) {
+            logger.error("java task interrupted ", e);
+            setExitStatusCode(TaskConstants.EXIT_CODE_FAILURE);
+            Thread.currentThread().interrupt();
+        } catch (RunTypeNotFoundException e) {
+            logger.error(e.getMessage());
+            setExitStatusCode(TaskConstants.EXIT_CODE_FAILURE);
+            throw e;
+        } catch (Exception e) {
+            logger.error("java task failed ", e);
+            setExitStatusCode(TaskConstants.EXIT_CODE_FAILURE);
+            throw new TaskException("run java task error", e);
+        }
+    }
+
+    /**
+     * @description: Construct a shell command for the java Run mode
+     * @param: []
+     * @return: java.lang.String
+     **/
+    protected String buildJavaCommand() throws Exception {
+        String sourceCode = buildJavaSourceContent();
+        String className = compilerRawScript(sourceCode);
+        StringBuilder builder = new StringBuilder();
+        builder.append(getJavaCommandPath())
+                .append("java").append(" ")
+                .append(buildResourcePath())
+                .append(" ")
+                .append(className).append(" ")
+                .append(javaParameters.getMainArgs().trim()).append(" ")
+                .append(javaParameters.getJvmArgs().trim());
+        return builder.toString();
+    }
+
+    private void setMainJarName() {
+        ResourceInfo mainJar = javaParameters.getMainJar();
+        String resourceName = getResourceNameOfMainJar(mainJar);
+        mainJar.setRes(resourceName);
+        javaParameters.setMainJar(mainJar);
+    }
+
+    /**
+     * @description: Construct a shell command for the java -jar Run mode
+     * @param: []
+     * @return: java.lang.String
+     **/
+    protected String buildJarCommand() {
+        String fullName = javaParameters.getMainJar().getResourceName();
+        String mainJarName = fullName.substring(0, fullName.lastIndexOf('.'));
+        mainJarName = mainJarName.substring(mainJarName.lastIndexOf('.') + 1) + ".jar";
+        StringBuilder builder = new StringBuilder();
+        builder.append(getJavaCommandPath())
+                .append("java").append(" ")
+                .append(buildResourcePath()).append(" ")
+                .append("-jar").append(" ")
+                .append(taskRequest.getExecutePath())
+                .append(mainJarName).append(" ")
+                .append(javaParameters.getMainArgs().trim()).append(" ")
+                .append(javaParameters.getJvmArgs().trim());
+        return builder.toString();
+    }
+
+    private String getResourceNameOfMainJar(ResourceInfo mainJar) {
+        if (null == mainJar) {
+            throw new RuntimeException("The jar for the task is required.");
+        }
+        return mainJar.getId() == 0
+                ? mainJar.getRes()
+                // when update resource maybe has error
+                : mainJar.getResourceName().replaceFirst(SINGLE_SLASH, "");
+    }
+
+    @Override
+    public void cancelApplication(boolean cancelApplication) throws Exception {
+        // cancel process
+        shellCommandExecutor.cancelApplication();
+    }
+
+    @Override
+    public AbstractParameters getParameters() {
+        return javaParameters;
+    }
+
+    /**
+     * @description: Replaces placeholders such as local variables in source files
+     * @param: [java.lang.String]
+     * @return: java.lang.String
+     **/
+    protected static String convertJavaSourceCodePlaceholders(String rawScript) throws StringIndexOutOfBoundsException {
+        int len = "${setShareVar(${".length();
+        int scriptStart = 0;
+        while ((scriptStart = rawScript.indexOf("${setShareVar(${", scriptStart)) != -1) {
+            int start = -1;
+            int end = rawScript.indexOf('}', scriptStart + len);
+            String prop = rawScript.substring(scriptStart + len, end);
+
+            start = rawScript.indexOf(',', end);
+            end = rawScript.indexOf(')', start);
+
+            String value = rawScript.substring(start + 1, end);
+
+            start = rawScript.indexOf('}', start) + 1;
+            end = rawScript.length();
+
+            String replaceScript = String.format("print(\"${{setValue({},{})}}\".format(\"%s\",%s))", prop, value);
+
+            rawScript = rawScript.substring(0, scriptStart) + replaceScript + rawScript.substring(start, end);
+
+            scriptStart += replaceScript.length();
+        }
+        return rawScript;
+    }
+
+    /**
+     * @description: Creates a Java source file when it does not exist
+     * @param: [java.lang.String, java.lang.String]
+     * @return: java.lang.String
+     **/
+    protected void createJavaSourceFileIfNotExists(String sourceCode, String fileName) throws IOException {
+        logger.info("tenantCode: {}, task dir:{}", taskRequest.getTenantCode(), taskRequest.getExecutePath());
+
+        if (!Files.exists(Paths.get(fileName))) {
+            logger.info("generate java source file: {}", fileName);
+
+            StringBuilder sb = new StringBuilder();
+            sb.append(sourceCode);
+            logger.info(sb.toString());
+
+            // write data to file
+            FileUtils.writeStringToFile(new File(fileName),
+                    sb.toString(),
+                    StandardCharsets.UTF_8);
+        } else {
+            throw new JavaSourceFileExistException("java source file exists, please report an issue on official.");
+        }
+    }
+
+    /**
+     * @description: Construct the full path name of the Java source file from the temporary execution path of the task
+     * @param: []
+     * @return: java.lang.String
+     **/
+    protected String buildJavaSourceCodeFileFullName(String publicClassName) {
+        return String.format(JavaConstants.JAVA_SOURCE_CODE_NAME_TEMPLATE, taskRequest.getExecutePath(), publicClassName);
+    }
+
+    /**
+     * @description: Construct a Classpath or module path based on isModulePath
+     * @param: []
+     * @return: java.lang.String
+     **/
+    protected String buildResourcePath() {
+        StringBuilder builder = new StringBuilder();
+        if (javaParameters.isModulePath()) {
+            builder.append("--module-path");
+        } else {
+            builder.append("--class-path");
+        }
+        builder.append(" ").append(JavaConstants.CLASSPATH_CURRENT_DIR)
+                .append(JavaConstants.PATH_SEPARATOR)
+                .append(taskRequest.getExecutePath());
+        for (ResourceInfo info : javaParameters.getResourceFilesList()) {
+            builder.append(JavaConstants.PATH_SEPARATOR);
+            builder.append(taskRequest.getExecutePath())
+                    .append(info.getResourceName());
+        }
+        return builder.toString();
+    }
+
+    /**
+     * @description: Compile the Java source file
+     * @param: [java.lang.String]
+     * @return: java.lang.String
+     **/
+    protected String compilerRawScript(String sourceCode) throws IOException, InterruptedException {
+        String publicClassName = getPublicClassName(sourceCode);
+        String fileName =  buildJavaSourceCodeFileFullName(publicClassName);
+        createJavaSourceFileIfNotExists(sourceCode, fileName);
+        String compileCommand = buildJavaCompileCommand(fileName, sourceCode);
+        Preconditions.checkNotNull(compileCommand, "command not be null.");
+        TaskResponse compileResponse = shellCommandExecutor.run(compileCommand);
+        // must drop the command file ,if do not ,the next command will not run. because be limited the ShellCommandExecutor's create file rules
+        dropShellCommandFile();

Review Comment:
   This should be a common logic for shell task?



##########
dolphinscheduler-task-plugin/dolphinscheduler-task-java/src/main/java/org/apache/dolphinscheduler/plugin/task/java/JavaTask.java:
##########
@@ -0,0 +1,422 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.dolphinscheduler.plugin.task.java;
+
+import static org.apache.dolphinscheduler.plugin.task.api.TaskConstants.SINGLE_SLASH;
+import static org.apache.dolphinscheduler.plugin.task.java.JavaConstants.JAVA_HOME_VAR;
+import static org.apache.dolphinscheduler.plugin.task.java.JavaConstants.PUBLIC_CLASS_NAME_REGEX;
+
+
+import org.apache.dolphinscheduler.plugin.task.api.AbstractTaskExecutor;
+import org.apache.dolphinscheduler.plugin.task.api.ShellCommandExecutor;
+import org.apache.dolphinscheduler.plugin.task.api.TaskConstants;
+import org.apache.dolphinscheduler.plugin.task.api.TaskException;
+import org.apache.dolphinscheduler.plugin.task.api.TaskExecutionContext;
+import org.apache.dolphinscheduler.plugin.task.api.model.Property;
+import org.apache.dolphinscheduler.plugin.task.api.model.ResourceInfo;
+import org.apache.dolphinscheduler.plugin.task.api.model.TaskResponse;
+import org.apache.dolphinscheduler.plugin.task.api.parameters.AbstractParameters;
+import org.apache.dolphinscheduler.plugin.task.api.parser.ParamUtils;
+import org.apache.dolphinscheduler.plugin.task.api.parser.ParameterUtils;
+import org.apache.dolphinscheduler.plugin.task.api.utils.MapUtils;
+import org.apache.dolphinscheduler.plugin.task.java.exception.JavaSourceFileExistException;
+import org.apache.dolphinscheduler.plugin.task.java.exception.PublicClassNotFoundException;
+import org.apache.dolphinscheduler.plugin.task.java.exception.RunTypeNotFoundException;
+import org.apache.dolphinscheduler.spi.utils.JSONUtils;
+
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.lang3.SystemUtils;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import com.google.common.base.Preconditions;
+
+/**
+ * java task
+ */
+public class JavaTask extends AbstractTaskExecutor {
+
+    /**
+     * Contains various parameters for this task
+     */
+    private JavaParameters javaParameters;
+
+    /**
+     * To run shell commands
+     */
+    private ShellCommandExecutor shellCommandExecutor;
+
+    /**
+     * task execution context
+     */
+    private TaskExecutionContext taskRequest;
+
+    /**
+     * class name regex pattern
+     */
+    private static final Pattern classNamePattern = Pattern.compile(PUBLIC_CLASS_NAME_REGEX);
+
+    /**
+     * @description: Construct a Java task
+     * @param: [org.apache.dolphinscheduler.plugin.task.api.TaskExecutionContext]
+     * @return: JavaTask
+     **/
+    public JavaTask(TaskExecutionContext taskRequest) {
+        super(taskRequest);
+        this.taskRequest = taskRequest;
+        this.shellCommandExecutor = new ShellCommandExecutor(this::logHandle,
+                taskRequest,
+                logger);
+    }
+
+    /**
+     * @description: Initializes a Java task
+     * @param: []
+     * @return: void
+     **/
+    @Override
+    public void init() {
+        logger.info("java task params {}", taskRequest.getTaskParams());
+        javaParameters = JSONUtils.parseObject(taskRequest.getTaskParams(), JavaParameters.class);
+        if (javaParameters == null || !javaParameters.checkParameters()) {
+            throw new TaskException("java task params is not valid");
+        }
+        if (javaParameters.getRunType().equals(JavaConstants.RUN_TYPE_JAR)) {
+            setMainJarName();
+        }
+    }
+
+    /**
+     * @description: Gets the Java source file that was initially processed
+     * @param: []
+     * @return: java.lang.String
+     **/
+    @Override
+    public String getPreScript() {
+        String rawJavaScript = javaParameters.getRawScript().replaceAll("\\r\\n", "\n");
+        try {
+            rawJavaScript = convertJavaSourceCodePlaceholders(rawJavaScript);
+        } catch (StringIndexOutOfBoundsException e) {
+            logger.error("setShareVar field format error, raw java script : {}", rawJavaScript);
+        }
+        return rawJavaScript;
+    }
+
+    /**
+     * @description: Execute Java tasks
+     * @param: []
+     * @return: void
+     **/
+    @Override
+    public void handle() throws Exception {
+        try {
+            // Step 1: judge if is java or jar run type.
+            // Step 2 case1: The jar run type builds the command directly, adding resource to the java -jar class when building the command
+            // Step 2 case2: The java run type, first replace the custom parameters, then compile the code, and then build the command will add resource
+            // Step 3: To run the command
+            String command = null;
+            switch (javaParameters.getRunType()) {
+                case JavaConstants.RUN_TYPE_JAVA:
+                    command = buildJavaCommand();
+                    break;
+                case JavaConstants.RUN_TYPE_JAR:
+                    command = buildJarCommand();
+                    break;
+                default:
+                    throw new RunTypeNotFoundException("run type is required, but it is null now.");
+            }
+            Preconditions.checkNotNull(command, "command not be null.");
+            TaskResponse taskResponse = shellCommandExecutor.run(command);
+            logger.info("java task run result : {}", taskResponse);
+            setExitStatusCode(taskResponse.getExitStatusCode());
+            setAppIds(taskResponse.getAppIds());
+            setProcessId(taskResponse.getProcessId());
+            setVarPool(shellCommandExecutor.getVarPool());
+        } catch (InterruptedException e) {
+            logger.error("java task interrupted ", e);
+            setExitStatusCode(TaskConstants.EXIT_CODE_FAILURE);
+            Thread.currentThread().interrupt();
+        } catch (RunTypeNotFoundException e) {
+            logger.error(e.getMessage());
+            setExitStatusCode(TaskConstants.EXIT_CODE_FAILURE);
+            throw e;
+        } catch (Exception e) {
+            logger.error("java task failed ", e);
+            setExitStatusCode(TaskConstants.EXIT_CODE_FAILURE);
+            throw new TaskException("run java task error", e);
+        }
+    }
+
+    /**
+     * @description: Construct a shell command for the java Run mode
+     * @param: []
+     * @return: java.lang.String
+     **/
+    protected String buildJavaCommand() throws Exception {

Review Comment:
   ```suggestion
       protected @Nonnull String buildJavaCommand() throws Exception {
   ```



##########
dolphinscheduler-task-plugin/dolphinscheduler-task-java/src/main/java/org/apache/dolphinscheduler/plugin/task/java/JavaTask.java:
##########
@@ -0,0 +1,422 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.dolphinscheduler.plugin.task.java;
+
+import static org.apache.dolphinscheduler.plugin.task.api.TaskConstants.SINGLE_SLASH;
+import static org.apache.dolphinscheduler.plugin.task.java.JavaConstants.JAVA_HOME_VAR;
+import static org.apache.dolphinscheduler.plugin.task.java.JavaConstants.PUBLIC_CLASS_NAME_REGEX;
+
+
+import org.apache.dolphinscheduler.plugin.task.api.AbstractTaskExecutor;
+import org.apache.dolphinscheduler.plugin.task.api.ShellCommandExecutor;
+import org.apache.dolphinscheduler.plugin.task.api.TaskConstants;
+import org.apache.dolphinscheduler.plugin.task.api.TaskException;
+import org.apache.dolphinscheduler.plugin.task.api.TaskExecutionContext;
+import org.apache.dolphinscheduler.plugin.task.api.model.Property;
+import org.apache.dolphinscheduler.plugin.task.api.model.ResourceInfo;
+import org.apache.dolphinscheduler.plugin.task.api.model.TaskResponse;
+import org.apache.dolphinscheduler.plugin.task.api.parameters.AbstractParameters;
+import org.apache.dolphinscheduler.plugin.task.api.parser.ParamUtils;
+import org.apache.dolphinscheduler.plugin.task.api.parser.ParameterUtils;
+import org.apache.dolphinscheduler.plugin.task.api.utils.MapUtils;
+import org.apache.dolphinscheduler.plugin.task.java.exception.JavaSourceFileExistException;
+import org.apache.dolphinscheduler.plugin.task.java.exception.PublicClassNotFoundException;
+import org.apache.dolphinscheduler.plugin.task.java.exception.RunTypeNotFoundException;
+import org.apache.dolphinscheduler.spi.utils.JSONUtils;
+
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.lang3.SystemUtils;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import com.google.common.base.Preconditions;
+
+/**
+ * java task
+ */

Review Comment:
   ```suggestion
   
   ```



##########
dolphinscheduler-task-plugin/dolphinscheduler-task-java/src/main/java/org/apache/dolphinscheduler/plugin/task/java/JavaTask.java:
##########
@@ -0,0 +1,422 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.dolphinscheduler.plugin.task.java;
+
+import static org.apache.dolphinscheduler.plugin.task.api.TaskConstants.SINGLE_SLASH;
+import static org.apache.dolphinscheduler.plugin.task.java.JavaConstants.JAVA_HOME_VAR;
+import static org.apache.dolphinscheduler.plugin.task.java.JavaConstants.PUBLIC_CLASS_NAME_REGEX;
+
+
+import org.apache.dolphinscheduler.plugin.task.api.AbstractTaskExecutor;
+import org.apache.dolphinscheduler.plugin.task.api.ShellCommandExecutor;
+import org.apache.dolphinscheduler.plugin.task.api.TaskConstants;
+import org.apache.dolphinscheduler.plugin.task.api.TaskException;
+import org.apache.dolphinscheduler.plugin.task.api.TaskExecutionContext;
+import org.apache.dolphinscheduler.plugin.task.api.model.Property;
+import org.apache.dolphinscheduler.plugin.task.api.model.ResourceInfo;
+import org.apache.dolphinscheduler.plugin.task.api.model.TaskResponse;
+import org.apache.dolphinscheduler.plugin.task.api.parameters.AbstractParameters;
+import org.apache.dolphinscheduler.plugin.task.api.parser.ParamUtils;
+import org.apache.dolphinscheduler.plugin.task.api.parser.ParameterUtils;
+import org.apache.dolphinscheduler.plugin.task.api.utils.MapUtils;
+import org.apache.dolphinscheduler.plugin.task.java.exception.JavaSourceFileExistException;
+import org.apache.dolphinscheduler.plugin.task.java.exception.PublicClassNotFoundException;
+import org.apache.dolphinscheduler.plugin.task.java.exception.RunTypeNotFoundException;
+import org.apache.dolphinscheduler.spi.utils.JSONUtils;
+
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.lang3.SystemUtils;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import com.google.common.base.Preconditions;
+
+/**
+ * java task
+ */
+public class JavaTask extends AbstractTaskExecutor {
+
+    /**
+     * Contains various parameters for this task
+     */
+    private JavaParameters javaParameters;
+
+    /**
+     * To run shell commands
+     */
+    private ShellCommandExecutor shellCommandExecutor;
+
+    /**
+     * task execution context
+     */
+    private TaskExecutionContext taskRequest;
+
+    /**
+     * class name regex pattern
+     */
+    private static final Pattern classNamePattern = Pattern.compile(PUBLIC_CLASS_NAME_REGEX);
+
+    /**
+     * @description: Construct a Java task
+     * @param: [org.apache.dolphinscheduler.plugin.task.api.TaskExecutionContext]
+     * @return: JavaTask
+     **/
+    public JavaTask(TaskExecutionContext taskRequest) {
+        super(taskRequest);
+        this.taskRequest = taskRequest;
+        this.shellCommandExecutor = new ShellCommandExecutor(this::logHandle,
+                taskRequest,
+                logger);
+    }
+
+    /**
+     * @description: Initializes a Java task
+     * @param: []
+     * @return: void
+     **/
+    @Override
+    public void init() {
+        logger.info("java task params {}", taskRequest.getTaskParams());
+        javaParameters = JSONUtils.parseObject(taskRequest.getTaskParams(), JavaParameters.class);
+        if (javaParameters == null || !javaParameters.checkParameters()) {
+            throw new TaskException("java task params is not valid");
+        }
+        if (javaParameters.getRunType().equals(JavaConstants.RUN_TYPE_JAR)) {
+            setMainJarName();
+        }
+    }
+
+    /**
+     * @description: Gets the Java source file that was initially processed
+     * @param: []
+     * @return: java.lang.String
+     **/
+    @Override
+    public String getPreScript() {
+        String rawJavaScript = javaParameters.getRawScript().replaceAll("\\r\\n", "\n");
+        try {
+            rawJavaScript = convertJavaSourceCodePlaceholders(rawJavaScript);
+        } catch (StringIndexOutOfBoundsException e) {
+            logger.error("setShareVar field format error, raw java script : {}", rawJavaScript);
+        }
+        return rawJavaScript;
+    }
+
+    /**
+     * @description: Execute Java tasks
+     * @param: []
+     * @return: void
+     **/
+    @Override
+    public void handle() throws Exception {
+        try {
+            // Step 1: judge if is java or jar run type.
+            // Step 2 case1: The jar run type builds the command directly, adding resource to the java -jar class when building the command
+            // Step 2 case2: The java run type, first replace the custom parameters, then compile the code, and then build the command will add resource
+            // Step 3: To run the command
+            String command = null;
+            switch (javaParameters.getRunType()) {
+                case JavaConstants.RUN_TYPE_JAVA:
+                    command = buildJavaCommand();
+                    break;
+                case JavaConstants.RUN_TYPE_JAR:
+                    command = buildJarCommand();
+                    break;
+                default:
+                    throw new RunTypeNotFoundException("run type is required, but it is null now.");
+            }
+            Preconditions.checkNotNull(command, "command not be null.");
+            TaskResponse taskResponse = shellCommandExecutor.run(command);
+            logger.info("java task run result : {}", taskResponse);
+            setExitStatusCode(taskResponse.getExitStatusCode());
+            setAppIds(taskResponse.getAppIds());
+            setProcessId(taskResponse.getProcessId());
+            setVarPool(shellCommandExecutor.getVarPool());
+        } catch (InterruptedException e) {
+            logger.error("java task interrupted ", e);
+            setExitStatusCode(TaskConstants.EXIT_CODE_FAILURE);
+            Thread.currentThread().interrupt();
+        } catch (RunTypeNotFoundException e) {
+            logger.error(e.getMessage());
+            setExitStatusCode(TaskConstants.EXIT_CODE_FAILURE);
+            throw e;

Review Comment:
   ```suggestion
           
   ```
   This catch is not needed, if you want to print the exception, it's better to print the thread stack rather than e.getMessage.



##########
dolphinscheduler-task-plugin/dolphinscheduler-task-java/src/main/java/org/apache/dolphinscheduler/plugin/task/java/JavaTask.java:
##########
@@ -0,0 +1,422 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.dolphinscheduler.plugin.task.java;
+
+import static org.apache.dolphinscheduler.plugin.task.api.TaskConstants.SINGLE_SLASH;
+import static org.apache.dolphinscheduler.plugin.task.java.JavaConstants.JAVA_HOME_VAR;
+import static org.apache.dolphinscheduler.plugin.task.java.JavaConstants.PUBLIC_CLASS_NAME_REGEX;
+
+
+import org.apache.dolphinscheduler.plugin.task.api.AbstractTaskExecutor;
+import org.apache.dolphinscheduler.plugin.task.api.ShellCommandExecutor;
+import org.apache.dolphinscheduler.plugin.task.api.TaskConstants;
+import org.apache.dolphinscheduler.plugin.task.api.TaskException;
+import org.apache.dolphinscheduler.plugin.task.api.TaskExecutionContext;
+import org.apache.dolphinscheduler.plugin.task.api.model.Property;
+import org.apache.dolphinscheduler.plugin.task.api.model.ResourceInfo;
+import org.apache.dolphinscheduler.plugin.task.api.model.TaskResponse;
+import org.apache.dolphinscheduler.plugin.task.api.parameters.AbstractParameters;
+import org.apache.dolphinscheduler.plugin.task.api.parser.ParamUtils;
+import org.apache.dolphinscheduler.plugin.task.api.parser.ParameterUtils;
+import org.apache.dolphinscheduler.plugin.task.api.utils.MapUtils;
+import org.apache.dolphinscheduler.plugin.task.java.exception.JavaSourceFileExistException;
+import org.apache.dolphinscheduler.plugin.task.java.exception.PublicClassNotFoundException;
+import org.apache.dolphinscheduler.plugin.task.java.exception.RunTypeNotFoundException;
+import org.apache.dolphinscheduler.spi.utils.JSONUtils;
+
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.lang3.SystemUtils;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import com.google.common.base.Preconditions;
+
+/**
+ * java task
+ */
+public class JavaTask extends AbstractTaskExecutor {
+
+    /**
+     * Contains various parameters for this task
+     */
+    private JavaParameters javaParameters;
+
+    /**
+     * To run shell commands
+     */
+    private ShellCommandExecutor shellCommandExecutor;
+
+    /**
+     * task execution context
+     */
+    private TaskExecutionContext taskRequest;
+
+    /**
+     * class name regex pattern
+     */
+    private static final Pattern classNamePattern = Pattern.compile(PUBLIC_CLASS_NAME_REGEX);
+
+    /**
+     * @description: Construct a Java task
+     * @param: [org.apache.dolphinscheduler.plugin.task.api.TaskExecutionContext]
+     * @return: JavaTask
+     **/
+    public JavaTask(TaskExecutionContext taskRequest) {
+        super(taskRequest);
+        this.taskRequest = taskRequest;
+        this.shellCommandExecutor = new ShellCommandExecutor(this::logHandle,
+                taskRequest,
+                logger);
+    }
+
+    /**
+     * @description: Initializes a Java task
+     * @param: []
+     * @return: void
+     **/
+    @Override
+    public void init() {
+        logger.info("java task params {}", taskRequest.getTaskParams());
+        javaParameters = JSONUtils.parseObject(taskRequest.getTaskParams(), JavaParameters.class);
+        if (javaParameters == null || !javaParameters.checkParameters()) {
+            throw new TaskException("java task params is not valid");
+        }
+        if (javaParameters.getRunType().equals(JavaConstants.RUN_TYPE_JAR)) {
+            setMainJarName();
+        }
+    }
+
+    /**
+     * @description: Gets the Java source file that was initially processed
+     * @param: []
+     * @return: java.lang.String
+     **/
+    @Override
+    public String getPreScript() {
+        String rawJavaScript = javaParameters.getRawScript().replaceAll("\\r\\n", "\n");
+        try {
+            rawJavaScript = convertJavaSourceCodePlaceholders(rawJavaScript);
+        } catch (StringIndexOutOfBoundsException e) {
+            logger.error("setShareVar field format error, raw java script : {}", rawJavaScript);

Review Comment:
   ```suggestion
               logger.error("setShareVar field format error, raw java script : {}", rawJavaScript, e);
   ```



##########
dolphinscheduler-task-plugin/dolphinscheduler-task-java/src/main/java/org/apache/dolphinscheduler/plugin/task/java/JavaTask.java:
##########
@@ -0,0 +1,422 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.dolphinscheduler.plugin.task.java;
+
+import static org.apache.dolphinscheduler.plugin.task.api.TaskConstants.SINGLE_SLASH;
+import static org.apache.dolphinscheduler.plugin.task.java.JavaConstants.JAVA_HOME_VAR;
+import static org.apache.dolphinscheduler.plugin.task.java.JavaConstants.PUBLIC_CLASS_NAME_REGEX;
+
+
+import org.apache.dolphinscheduler.plugin.task.api.AbstractTaskExecutor;
+import org.apache.dolphinscheduler.plugin.task.api.ShellCommandExecutor;
+import org.apache.dolphinscheduler.plugin.task.api.TaskConstants;
+import org.apache.dolphinscheduler.plugin.task.api.TaskException;
+import org.apache.dolphinscheduler.plugin.task.api.TaskExecutionContext;
+import org.apache.dolphinscheduler.plugin.task.api.model.Property;
+import org.apache.dolphinscheduler.plugin.task.api.model.ResourceInfo;
+import org.apache.dolphinscheduler.plugin.task.api.model.TaskResponse;
+import org.apache.dolphinscheduler.plugin.task.api.parameters.AbstractParameters;
+import org.apache.dolphinscheduler.plugin.task.api.parser.ParamUtils;
+import org.apache.dolphinscheduler.plugin.task.api.parser.ParameterUtils;
+import org.apache.dolphinscheduler.plugin.task.api.utils.MapUtils;
+import org.apache.dolphinscheduler.plugin.task.java.exception.JavaSourceFileExistException;
+import org.apache.dolphinscheduler.plugin.task.java.exception.PublicClassNotFoundException;
+import org.apache.dolphinscheduler.plugin.task.java.exception.RunTypeNotFoundException;
+import org.apache.dolphinscheduler.spi.utils.JSONUtils;
+
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.lang3.SystemUtils;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import com.google.common.base.Preconditions;
+
+/**
+ * java task
+ */
+public class JavaTask extends AbstractTaskExecutor {
+
+    /**
+     * Contains various parameters for this task
+     */
+    private JavaParameters javaParameters;
+
+    /**
+     * To run shell commands
+     */
+    private ShellCommandExecutor shellCommandExecutor;
+
+    /**
+     * task execution context
+     */
+    private TaskExecutionContext taskRequest;
+
+    /**
+     * class name regex pattern
+     */
+    private static final Pattern classNamePattern = Pattern.compile(PUBLIC_CLASS_NAME_REGEX);
+
+    /**
+     * @description: Construct a Java task
+     * @param: [org.apache.dolphinscheduler.plugin.task.api.TaskExecutionContext]
+     * @return: JavaTask
+     **/
+    public JavaTask(TaskExecutionContext taskRequest) {
+        super(taskRequest);
+        this.taskRequest = taskRequest;
+        this.shellCommandExecutor = new ShellCommandExecutor(this::logHandle,
+                taskRequest,
+                logger);
+    }
+
+    /**
+     * @description: Initializes a Java task
+     * @param: []
+     * @return: void
+     **/
+    @Override
+    public void init() {
+        logger.info("java task params {}", taskRequest.getTaskParams());
+        javaParameters = JSONUtils.parseObject(taskRequest.getTaskParams(), JavaParameters.class);
+        if (javaParameters == null || !javaParameters.checkParameters()) {
+            throw new TaskException("java task params is not valid");
+        }
+        if (javaParameters.getRunType().equals(JavaConstants.RUN_TYPE_JAR)) {
+            setMainJarName();
+        }
+    }
+
+    /**
+     * @description: Gets the Java source file that was initially processed
+     * @param: []
+     * @return: java.lang.String
+     **/
+    @Override
+    public String getPreScript() {
+        String rawJavaScript = javaParameters.getRawScript().replaceAll("\\r\\n", "\n");
+        try {
+            rawJavaScript = convertJavaSourceCodePlaceholders(rawJavaScript);
+        } catch (StringIndexOutOfBoundsException e) {
+            logger.error("setShareVar field format error, raw java script : {}", rawJavaScript);
+        }
+        return rawJavaScript;
+    }
+
+    /**
+     * @description: Execute Java tasks
+     * @param: []
+     * @return: void
+     **/
+    @Override
+    public void handle() throws Exception {
+        try {
+            // Step 1: judge if is java or jar run type.
+            // Step 2 case1: The jar run type builds the command directly, adding resource to the java -jar class when building the command
+            // Step 2 case2: The java run type, first replace the custom parameters, then compile the code, and then build the command will add resource
+            // Step 3: To run the command
+            String command = null;
+            switch (javaParameters.getRunType()) {
+                case JavaConstants.RUN_TYPE_JAVA:
+                    command = buildJavaCommand();
+                    break;
+                case JavaConstants.RUN_TYPE_JAR:
+                    command = buildJarCommand();
+                    break;
+                default:
+                    throw new RunTypeNotFoundException("run type is required, but it is null now.");
+            }
+            Preconditions.checkNotNull(command, "command not be null.");
+            TaskResponse taskResponse = shellCommandExecutor.run(command);
+            logger.info("java task run result : {}", taskResponse);
+            setExitStatusCode(taskResponse.getExitStatusCode());
+            setAppIds(taskResponse.getAppIds());
+            setProcessId(taskResponse.getProcessId());
+            setVarPool(shellCommandExecutor.getVarPool());
+        } catch (InterruptedException e) {
+            logger.error("java task interrupted ", e);
+            setExitStatusCode(TaskConstants.EXIT_CODE_FAILURE);
+            Thread.currentThread().interrupt();
+        } catch (RunTypeNotFoundException e) {
+            logger.error(e.getMessage());
+            setExitStatusCode(TaskConstants.EXIT_CODE_FAILURE);
+            throw e;
+        } catch (Exception e) {
+            logger.error("java task failed ", e);
+            setExitStatusCode(TaskConstants.EXIT_CODE_FAILURE);
+            throw new TaskException("run java task error", e);
+        }
+    }
+
+    /**
+     * @description: Construct a shell command for the java Run mode
+     * @param: []
+     * @return: java.lang.String
+     **/
+    protected String buildJavaCommand() throws Exception {
+        String sourceCode = buildJavaSourceContent();
+        String className = compilerRawScript(sourceCode);
+        StringBuilder builder = new StringBuilder();
+        builder.append(getJavaCommandPath())
+                .append("java").append(" ")
+                .append(buildResourcePath())
+                .append(" ")
+                .append(className).append(" ")
+                .append(javaParameters.getMainArgs().trim()).append(" ")
+                .append(javaParameters.getJvmArgs().trim());
+        return builder.toString();
+    }
+
+    private void setMainJarName() {
+        ResourceInfo mainJar = javaParameters.getMainJar();
+        String resourceName = getResourceNameOfMainJar(mainJar);
+        mainJar.setRes(resourceName);
+        javaParameters.setMainJar(mainJar);
+    }
+
+    /**
+     * @description: Construct a shell command for the java -jar Run mode
+     * @param: []
+     * @return: java.lang.String
+     **/

Review Comment:
   ```suggestion
        * @description: Construct a shell command for the java -jar Run mode
        * @return: java.lang.String
        **/
   ```



##########
dolphinscheduler-task-plugin/dolphinscheduler-task-java/src/main/java/org/apache/dolphinscheduler/plugin/task/java/JavaTask.java:
##########
@@ -0,0 +1,422 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.dolphinscheduler.plugin.task.java;
+
+import static org.apache.dolphinscheduler.plugin.task.api.TaskConstants.SINGLE_SLASH;
+import static org.apache.dolphinscheduler.plugin.task.java.JavaConstants.JAVA_HOME_VAR;
+import static org.apache.dolphinscheduler.plugin.task.java.JavaConstants.PUBLIC_CLASS_NAME_REGEX;
+
+
+import org.apache.dolphinscheduler.plugin.task.api.AbstractTaskExecutor;
+import org.apache.dolphinscheduler.plugin.task.api.ShellCommandExecutor;
+import org.apache.dolphinscheduler.plugin.task.api.TaskConstants;
+import org.apache.dolphinscheduler.plugin.task.api.TaskException;
+import org.apache.dolphinscheduler.plugin.task.api.TaskExecutionContext;
+import org.apache.dolphinscheduler.plugin.task.api.model.Property;
+import org.apache.dolphinscheduler.plugin.task.api.model.ResourceInfo;
+import org.apache.dolphinscheduler.plugin.task.api.model.TaskResponse;
+import org.apache.dolphinscheduler.plugin.task.api.parameters.AbstractParameters;
+import org.apache.dolphinscheduler.plugin.task.api.parser.ParamUtils;
+import org.apache.dolphinscheduler.plugin.task.api.parser.ParameterUtils;
+import org.apache.dolphinscheduler.plugin.task.api.utils.MapUtils;
+import org.apache.dolphinscheduler.plugin.task.java.exception.JavaSourceFileExistException;
+import org.apache.dolphinscheduler.plugin.task.java.exception.PublicClassNotFoundException;
+import org.apache.dolphinscheduler.plugin.task.java.exception.RunTypeNotFoundException;
+import org.apache.dolphinscheduler.spi.utils.JSONUtils;
+
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.lang3.SystemUtils;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import com.google.common.base.Preconditions;
+
+/**
+ * java task
+ */
+public class JavaTask extends AbstractTaskExecutor {
+
+    /**
+     * Contains various parameters for this task
+     */
+    private JavaParameters javaParameters;
+
+    /**
+     * To run shell commands
+     */
+    private ShellCommandExecutor shellCommandExecutor;
+
+    /**
+     * task execution context
+     */
+    private TaskExecutionContext taskRequest;
+
+    /**
+     * class name regex pattern
+     */
+    private static final Pattern classNamePattern = Pattern.compile(PUBLIC_CLASS_NAME_REGEX);
+
+    /**
+     * @description: Construct a Java task
+     * @param: [org.apache.dolphinscheduler.plugin.task.api.TaskExecutionContext]
+     * @return: JavaTask
+     **/
+    public JavaTask(TaskExecutionContext taskRequest) {
+        super(taskRequest);
+        this.taskRequest = taskRequest;
+        this.shellCommandExecutor = new ShellCommandExecutor(this::logHandle,
+                taskRequest,
+                logger);
+    }
+
+    /**
+     * @description: Initializes a Java task
+     * @param: []
+     * @return: void
+     **/
+    @Override
+    public void init() {
+        logger.info("java task params {}", taskRequest.getTaskParams());
+        javaParameters = JSONUtils.parseObject(taskRequest.getTaskParams(), JavaParameters.class);
+        if (javaParameters == null || !javaParameters.checkParameters()) {
+            throw new TaskException("java task params is not valid");
+        }
+        if (javaParameters.getRunType().equals(JavaConstants.RUN_TYPE_JAR)) {

Review Comment:
   ```suggestion
           if (JavaConstants.RUN_TYPE_JAR.equals(javaParameters.getRunType())) {
   ```



##########
dolphinscheduler-task-plugin/dolphinscheduler-task-java/src/main/java/org/apache/dolphinscheduler/plugin/task/java/JavaTask.java:
##########
@@ -0,0 +1,422 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.dolphinscheduler.plugin.task.java;
+
+import static org.apache.dolphinscheduler.plugin.task.api.TaskConstants.SINGLE_SLASH;
+import static org.apache.dolphinscheduler.plugin.task.java.JavaConstants.JAVA_HOME_VAR;
+import static org.apache.dolphinscheduler.plugin.task.java.JavaConstants.PUBLIC_CLASS_NAME_REGEX;
+
+
+import org.apache.dolphinscheduler.plugin.task.api.AbstractTaskExecutor;
+import org.apache.dolphinscheduler.plugin.task.api.ShellCommandExecutor;
+import org.apache.dolphinscheduler.plugin.task.api.TaskConstants;
+import org.apache.dolphinscheduler.plugin.task.api.TaskException;
+import org.apache.dolphinscheduler.plugin.task.api.TaskExecutionContext;
+import org.apache.dolphinscheduler.plugin.task.api.model.Property;
+import org.apache.dolphinscheduler.plugin.task.api.model.ResourceInfo;
+import org.apache.dolphinscheduler.plugin.task.api.model.TaskResponse;
+import org.apache.dolphinscheduler.plugin.task.api.parameters.AbstractParameters;
+import org.apache.dolphinscheduler.plugin.task.api.parser.ParamUtils;
+import org.apache.dolphinscheduler.plugin.task.api.parser.ParameterUtils;
+import org.apache.dolphinscheduler.plugin.task.api.utils.MapUtils;
+import org.apache.dolphinscheduler.plugin.task.java.exception.JavaSourceFileExistException;
+import org.apache.dolphinscheduler.plugin.task.java.exception.PublicClassNotFoundException;
+import org.apache.dolphinscheduler.plugin.task.java.exception.RunTypeNotFoundException;
+import org.apache.dolphinscheduler.spi.utils.JSONUtils;
+
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.lang3.SystemUtils;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import com.google.common.base.Preconditions;
+
+/**
+ * java task
+ */
+public class JavaTask extends AbstractTaskExecutor {
+
+    /**
+     * Contains various parameters for this task
+     */
+    private JavaParameters javaParameters;
+
+    /**
+     * To run shell commands
+     */
+    private ShellCommandExecutor shellCommandExecutor;
+
+    /**
+     * task execution context
+     */
+    private TaskExecutionContext taskRequest;
+
+    /**
+     * class name regex pattern
+     */
+    private static final Pattern classNamePattern = Pattern.compile(PUBLIC_CLASS_NAME_REGEX);
+
+    /**
+     * @description: Construct a Java task
+     * @param: [org.apache.dolphinscheduler.plugin.task.api.TaskExecutionContext]
+     * @return: JavaTask
+     **/
+    public JavaTask(TaskExecutionContext taskRequest) {
+        super(taskRequest);
+        this.taskRequest = taskRequest;
+        this.shellCommandExecutor = new ShellCommandExecutor(this::logHandle,
+                taskRequest,
+                logger);
+    }
+
+    /**
+     * @description: Initializes a Java task
+     * @param: []
+     * @return: void
+     **/
+    @Override
+    public void init() {
+        logger.info("java task params {}", taskRequest.getTaskParams());
+        javaParameters = JSONUtils.parseObject(taskRequest.getTaskParams(), JavaParameters.class);
+        if (javaParameters == null || !javaParameters.checkParameters()) {
+            throw new TaskException("java task params is not valid");
+        }
+        if (javaParameters.getRunType().equals(JavaConstants.RUN_TYPE_JAR)) {
+            setMainJarName();
+        }
+    }
+
+    /**
+     * @description: Gets the Java source file that was initially processed
+     * @param: []
+     * @return: java.lang.String
+     **/
+    @Override
+    public String getPreScript() {
+        String rawJavaScript = javaParameters.getRawScript().replaceAll("\\r\\n", "\n");
+        try {
+            rawJavaScript = convertJavaSourceCodePlaceholders(rawJavaScript);
+        } catch (StringIndexOutOfBoundsException e) {
+            logger.error("setShareVar field format error, raw java script : {}", rawJavaScript);
+        }
+        return rawJavaScript;
+    }
+
+    /**
+     * @description: Execute Java tasks
+     * @param: []
+     * @return: void
+     **/
+    @Override
+    public void handle() throws Exception {
+        try {
+            // Step 1: judge if is java or jar run type.
+            // Step 2 case1: The jar run type builds the command directly, adding resource to the java -jar class when building the command
+            // Step 2 case2: The java run type, first replace the custom parameters, then compile the code, and then build the command will add resource
+            // Step 3: To run the command
+            String command = null;
+            switch (javaParameters.getRunType()) {
+                case JavaConstants.RUN_TYPE_JAVA:
+                    command = buildJavaCommand();
+                    break;
+                case JavaConstants.RUN_TYPE_JAR:
+                    command = buildJarCommand();
+                    break;
+                default:
+                    throw new RunTypeNotFoundException("run type is required, but it is null now.");
+            }
+            Preconditions.checkNotNull(command, "command not be null.");
+            TaskResponse taskResponse = shellCommandExecutor.run(command);
+            logger.info("java task run result : {}", taskResponse);
+            setExitStatusCode(taskResponse.getExitStatusCode());
+            setAppIds(taskResponse.getAppIds());
+            setProcessId(taskResponse.getProcessId());
+            setVarPool(shellCommandExecutor.getVarPool());
+        } catch (InterruptedException e) {
+            logger.error("java task interrupted ", e);
+            setExitStatusCode(TaskConstants.EXIT_CODE_FAILURE);
+            Thread.currentThread().interrupt();
+        } catch (RunTypeNotFoundException e) {
+            logger.error(e.getMessage());
+            setExitStatusCode(TaskConstants.EXIT_CODE_FAILURE);
+            throw e;
+        } catch (Exception e) {
+            logger.error("java task failed ", e);
+            setExitStatusCode(TaskConstants.EXIT_CODE_FAILURE);
+            throw new TaskException("run java task error", e);
+        }
+    }
+
+    /**
+     * @description: Construct a shell command for the java Run mode
+     * @param: []
+     * @return: java.lang.String
+     **/
+    protected String buildJavaCommand() throws Exception {
+        String sourceCode = buildJavaSourceContent();
+        String className = compilerRawScript(sourceCode);
+        StringBuilder builder = new StringBuilder();
+        builder.append(getJavaCommandPath())
+                .append("java").append(" ")
+                .append(buildResourcePath())
+                .append(" ")
+                .append(className).append(" ")
+                .append(javaParameters.getMainArgs().trim()).append(" ")
+                .append(javaParameters.getJvmArgs().trim());
+        return builder.toString();
+    }
+
+    private void setMainJarName() {
+        ResourceInfo mainJar = javaParameters.getMainJar();
+        String resourceName = getResourceNameOfMainJar(mainJar);
+        mainJar.setRes(resourceName);
+        javaParameters.setMainJar(mainJar);
+    }
+
+    /**
+     * @description: Construct a shell command for the java -jar Run mode
+     * @param: []
+     * @return: java.lang.String
+     **/
+    protected String buildJarCommand() {
+        String fullName = javaParameters.getMainJar().getResourceName();
+        String mainJarName = fullName.substring(0, fullName.lastIndexOf('.'));
+        mainJarName = mainJarName.substring(mainJarName.lastIndexOf('.') + 1) + ".jar";
+        StringBuilder builder = new StringBuilder();
+        builder.append(getJavaCommandPath())
+                .append("java").append(" ")
+                .append(buildResourcePath()).append(" ")
+                .append("-jar").append(" ")
+                .append(taskRequest.getExecutePath())
+                .append(mainJarName).append(" ")
+                .append(javaParameters.getMainArgs().trim()).append(" ")
+                .append(javaParameters.getJvmArgs().trim());
+        return builder.toString();
+    }
+
+    private String getResourceNameOfMainJar(ResourceInfo mainJar) {
+        if (null == mainJar) {
+            throw new RuntimeException("The jar for the task is required.");
+        }
+        return mainJar.getId() == 0
+                ? mainJar.getRes()
+                // when update resource maybe has error
+                : mainJar.getResourceName().replaceFirst(SINGLE_SLASH, "");
+    }
+
+    @Override
+    public void cancelApplication(boolean cancelApplication) throws Exception {
+        // cancel process
+        shellCommandExecutor.cancelApplication();
+    }
+
+    @Override
+    public AbstractParameters getParameters() {
+        return javaParameters;
+    }
+
+    /**
+     * @description: Replaces placeholders such as local variables in source files
+     * @param: [java.lang.String]
+     * @return: java.lang.String

Review Comment:
   AFAIK, this is not the standard javadoc?



##########
dolphinscheduler-task-plugin/dolphinscheduler-task-java/src/main/java/org/apache/dolphinscheduler/plugin/task/java/JavaTask.java:
##########
@@ -0,0 +1,422 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.dolphinscheduler.plugin.task.java;
+
+import static org.apache.dolphinscheduler.plugin.task.api.TaskConstants.SINGLE_SLASH;
+import static org.apache.dolphinscheduler.plugin.task.java.JavaConstants.JAVA_HOME_VAR;
+import static org.apache.dolphinscheduler.plugin.task.java.JavaConstants.PUBLIC_CLASS_NAME_REGEX;
+
+
+import org.apache.dolphinscheduler.plugin.task.api.AbstractTaskExecutor;
+import org.apache.dolphinscheduler.plugin.task.api.ShellCommandExecutor;
+import org.apache.dolphinscheduler.plugin.task.api.TaskConstants;
+import org.apache.dolphinscheduler.plugin.task.api.TaskException;
+import org.apache.dolphinscheduler.plugin.task.api.TaskExecutionContext;
+import org.apache.dolphinscheduler.plugin.task.api.model.Property;
+import org.apache.dolphinscheduler.plugin.task.api.model.ResourceInfo;
+import org.apache.dolphinscheduler.plugin.task.api.model.TaskResponse;
+import org.apache.dolphinscheduler.plugin.task.api.parameters.AbstractParameters;
+import org.apache.dolphinscheduler.plugin.task.api.parser.ParamUtils;
+import org.apache.dolphinscheduler.plugin.task.api.parser.ParameterUtils;
+import org.apache.dolphinscheduler.plugin.task.api.utils.MapUtils;
+import org.apache.dolphinscheduler.plugin.task.java.exception.JavaSourceFileExistException;
+import org.apache.dolphinscheduler.plugin.task.java.exception.PublicClassNotFoundException;
+import org.apache.dolphinscheduler.plugin.task.java.exception.RunTypeNotFoundException;
+import org.apache.dolphinscheduler.spi.utils.JSONUtils;
+
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.lang3.SystemUtils;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import com.google.common.base.Preconditions;
+
+/**
+ * java task
+ */
+public class JavaTask extends AbstractTaskExecutor {
+
+    /**
+     * Contains various parameters for this task
+     */
+    private JavaParameters javaParameters;
+
+    /**
+     * To run shell commands
+     */
+    private ShellCommandExecutor shellCommandExecutor;
+
+    /**
+     * task execution context
+     */
+    private TaskExecutionContext taskRequest;
+
+    /**
+     * class name regex pattern
+     */
+    private static final Pattern classNamePattern = Pattern.compile(PUBLIC_CLASS_NAME_REGEX);
+
+    /**
+     * @description: Construct a Java task
+     * @param: [org.apache.dolphinscheduler.plugin.task.api.TaskExecutionContext]
+     * @return: JavaTask
+     **/
+    public JavaTask(TaskExecutionContext taskRequest) {
+        super(taskRequest);
+        this.taskRequest = taskRequest;
+        this.shellCommandExecutor = new ShellCommandExecutor(this::logHandle,
+                taskRequest,
+                logger);
+    }
+
+    /**
+     * @description: Initializes a Java task
+     * @param: []
+     * @return: void
+     **/
+    @Override
+    public void init() {
+        logger.info("java task params {}", taskRequest.getTaskParams());
+        javaParameters = JSONUtils.parseObject(taskRequest.getTaskParams(), JavaParameters.class);
+        if (javaParameters == null || !javaParameters.checkParameters()) {
+            throw new TaskException("java task params is not valid");
+        }
+        if (javaParameters.getRunType().equals(JavaConstants.RUN_TYPE_JAR)) {
+            setMainJarName();
+        }
+    }
+
+    /**
+     * @description: Gets the Java source file that was initially processed
+     * @param: []
+     * @return: java.lang.String
+     **/
+    @Override
+    public String getPreScript() {
+        String rawJavaScript = javaParameters.getRawScript().replaceAll("\\r\\n", "\n");
+        try {
+            rawJavaScript = convertJavaSourceCodePlaceholders(rawJavaScript);
+        } catch (StringIndexOutOfBoundsException e) {
+            logger.error("setShareVar field format error, raw java script : {}", rawJavaScript);
+        }
+        return rawJavaScript;
+    }
+
+    /**
+     * @description: Execute Java tasks
+     * @param: []
+     * @return: void
+     **/
+    @Override
+    public void handle() throws Exception {
+        try {
+            // Step 1: judge if is java or jar run type.
+            // Step 2 case1: The jar run type builds the command directly, adding resource to the java -jar class when building the command
+            // Step 2 case2: The java run type, first replace the custom parameters, then compile the code, and then build the command will add resource
+            // Step 3: To run the command
+            String command = null;
+            switch (javaParameters.getRunType()) {
+                case JavaConstants.RUN_TYPE_JAVA:
+                    command = buildJavaCommand();
+                    break;
+                case JavaConstants.RUN_TYPE_JAR:
+                    command = buildJarCommand();
+                    break;
+                default:
+                    throw new RunTypeNotFoundException("run type is required, but it is null now.");
+            }
+            Preconditions.checkNotNull(command, "command not be null.");
+            TaskResponse taskResponse = shellCommandExecutor.run(command);
+            logger.info("java task run result : {}", taskResponse);
+            setExitStatusCode(taskResponse.getExitStatusCode());
+            setAppIds(taskResponse.getAppIds());
+            setProcessId(taskResponse.getProcessId());
+            setVarPool(shellCommandExecutor.getVarPool());
+        } catch (InterruptedException e) {
+            logger.error("java task interrupted ", e);
+            setExitStatusCode(TaskConstants.EXIT_CODE_FAILURE);
+            Thread.currentThread().interrupt();
+        } catch (RunTypeNotFoundException e) {
+            logger.error(e.getMessage());
+            setExitStatusCode(TaskConstants.EXIT_CODE_FAILURE);
+            throw e;
+        } catch (Exception e) {
+            logger.error("java task failed ", e);
+            setExitStatusCode(TaskConstants.EXIT_CODE_FAILURE);
+            throw new TaskException("run java task error", e);
+        }
+    }
+
+    /**
+     * @description: Construct a shell command for the java Run mode
+     * @param: []
+     * @return: java.lang.String
+     **/
+    protected String buildJavaCommand() throws Exception {
+        String sourceCode = buildJavaSourceContent();
+        String className = compilerRawScript(sourceCode);
+        StringBuilder builder = new StringBuilder();
+        builder.append(getJavaCommandPath())
+                .append("java").append(" ")
+                .append(buildResourcePath())
+                .append(" ")
+                .append(className).append(" ")
+                .append(javaParameters.getMainArgs().trim()).append(" ")
+                .append(javaParameters.getJvmArgs().trim());
+        return builder.toString();
+    }
+
+    private void setMainJarName() {
+        ResourceInfo mainJar = javaParameters.getMainJar();
+        String resourceName = getResourceNameOfMainJar(mainJar);
+        mainJar.setRes(resourceName);
+        javaParameters.setMainJar(mainJar);
+    }
+
+    /**
+     * @description: Construct a shell command for the java -jar Run mode
+     * @param: []
+     * @return: java.lang.String
+     **/
+    protected String buildJarCommand() {
+        String fullName = javaParameters.getMainJar().getResourceName();
+        String mainJarName = fullName.substring(0, fullName.lastIndexOf('.'));
+        mainJarName = mainJarName.substring(mainJarName.lastIndexOf('.') + 1) + ".jar";
+        StringBuilder builder = new StringBuilder();
+        builder.append(getJavaCommandPath())
+                .append("java").append(" ")
+                .append(buildResourcePath()).append(" ")
+                .append("-jar").append(" ")
+                .append(taskRequest.getExecutePath())
+                .append(mainJarName).append(" ")
+                .append(javaParameters.getMainArgs().trim()).append(" ")
+                .append(javaParameters.getJvmArgs().trim());
+        return builder.toString();
+    }
+
+    private String getResourceNameOfMainJar(ResourceInfo mainJar) {
+        if (null == mainJar) {
+            throw new RuntimeException("The jar for the task is required.");
+        }
+        return mainJar.getId() == 0
+                ? mainJar.getRes()
+                // when update resource maybe has error
+                : mainJar.getResourceName().replaceFirst(SINGLE_SLASH, "");
+    }
+
+    @Override
+    public void cancelApplication(boolean cancelApplication) throws Exception {
+        // cancel process
+        shellCommandExecutor.cancelApplication();
+    }
+
+    @Override
+    public AbstractParameters getParameters() {
+        return javaParameters;
+    }
+
+    /**
+     * @description: Replaces placeholders such as local variables in source files
+     * @param: [java.lang.String]
+     * @return: java.lang.String
+     **/
+    protected static String convertJavaSourceCodePlaceholders(String rawScript) throws StringIndexOutOfBoundsException {

Review Comment:
   Can we directly use `ParameterUtils.convertParameterPlaceholders`?



##########
dolphinscheduler-task-plugin/dolphinscheduler-task-java/src/main/java/org/apache/dolphinscheduler/plugin/task/java/JavaTask.java:
##########
@@ -0,0 +1,422 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.dolphinscheduler.plugin.task.java;
+
+import static org.apache.dolphinscheduler.plugin.task.api.TaskConstants.SINGLE_SLASH;
+import static org.apache.dolphinscheduler.plugin.task.java.JavaConstants.JAVA_HOME_VAR;
+import static org.apache.dolphinscheduler.plugin.task.java.JavaConstants.PUBLIC_CLASS_NAME_REGEX;
+
+
+import org.apache.dolphinscheduler.plugin.task.api.AbstractTaskExecutor;
+import org.apache.dolphinscheduler.plugin.task.api.ShellCommandExecutor;
+import org.apache.dolphinscheduler.plugin.task.api.TaskConstants;
+import org.apache.dolphinscheduler.plugin.task.api.TaskException;
+import org.apache.dolphinscheduler.plugin.task.api.TaskExecutionContext;
+import org.apache.dolphinscheduler.plugin.task.api.model.Property;
+import org.apache.dolphinscheduler.plugin.task.api.model.ResourceInfo;
+import org.apache.dolphinscheduler.plugin.task.api.model.TaskResponse;
+import org.apache.dolphinscheduler.plugin.task.api.parameters.AbstractParameters;
+import org.apache.dolphinscheduler.plugin.task.api.parser.ParamUtils;
+import org.apache.dolphinscheduler.plugin.task.api.parser.ParameterUtils;
+import org.apache.dolphinscheduler.plugin.task.api.utils.MapUtils;
+import org.apache.dolphinscheduler.plugin.task.java.exception.JavaSourceFileExistException;
+import org.apache.dolphinscheduler.plugin.task.java.exception.PublicClassNotFoundException;
+import org.apache.dolphinscheduler.plugin.task.java.exception.RunTypeNotFoundException;
+import org.apache.dolphinscheduler.spi.utils.JSONUtils;
+
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.lang3.SystemUtils;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import com.google.common.base.Preconditions;
+
+/**
+ * java task
+ */
+public class JavaTask extends AbstractTaskExecutor {
+
+    /**
+     * Contains various parameters for this task
+     */
+    private JavaParameters javaParameters;
+
+    /**
+     * To run shell commands
+     */
+    private ShellCommandExecutor shellCommandExecutor;
+
+    /**
+     * task execution context
+     */
+    private TaskExecutionContext taskRequest;
+
+    /**
+     * class name regex pattern
+     */
+    private static final Pattern classNamePattern = Pattern.compile(PUBLIC_CLASS_NAME_REGEX);
+
+    /**
+     * @description: Construct a Java task
+     * @param: [org.apache.dolphinscheduler.plugin.task.api.TaskExecutionContext]
+     * @return: JavaTask
+     **/
+    public JavaTask(TaskExecutionContext taskRequest) {
+        super(taskRequest);
+        this.taskRequest = taskRequest;
+        this.shellCommandExecutor = new ShellCommandExecutor(this::logHandle,
+                taskRequest,
+                logger);
+    }
+
+    /**
+     * @description: Initializes a Java task
+     * @param: []
+     * @return: void
+     **/
+    @Override
+    public void init() {
+        logger.info("java task params {}", taskRequest.getTaskParams());
+        javaParameters = JSONUtils.parseObject(taskRequest.getTaskParams(), JavaParameters.class);
+        if (javaParameters == null || !javaParameters.checkParameters()) {
+            throw new TaskException("java task params is not valid");
+        }
+        if (javaParameters.getRunType().equals(JavaConstants.RUN_TYPE_JAR)) {
+            setMainJarName();
+        }
+    }
+
+    /**
+     * @description: Gets the Java source file that was initially processed
+     * @param: []
+     * @return: java.lang.String
+     **/
+    @Override
+    public String getPreScript() {
+        String rawJavaScript = javaParameters.getRawScript().replaceAll("\\r\\n", "\n");
+        try {
+            rawJavaScript = convertJavaSourceCodePlaceholders(rawJavaScript);
+        } catch (StringIndexOutOfBoundsException e) {
+            logger.error("setShareVar field format error, raw java script : {}", rawJavaScript);
+        }
+        return rawJavaScript;
+    }
+
+    /**
+     * @description: Execute Java tasks
+     * @param: []
+     * @return: void
+     **/
+    @Override
+    public void handle() throws Exception {
+        try {
+            // Step 1: judge if is java or jar run type.
+            // Step 2 case1: The jar run type builds the command directly, adding resource to the java -jar class when building the command
+            // Step 2 case2: The java run type, first replace the custom parameters, then compile the code, and then build the command will add resource
+            // Step 3: To run the command
+            String command = null;
+            switch (javaParameters.getRunType()) {
+                case JavaConstants.RUN_TYPE_JAVA:
+                    command = buildJavaCommand();
+                    break;
+                case JavaConstants.RUN_TYPE_JAR:
+                    command = buildJarCommand();
+                    break;
+                default:
+                    throw new RunTypeNotFoundException("run type is required, but it is null now.");
+            }
+            Preconditions.checkNotNull(command, "command not be null.");
+            TaskResponse taskResponse = shellCommandExecutor.run(command);
+            logger.info("java task run result : {}", taskResponse);
+            setExitStatusCode(taskResponse.getExitStatusCode());
+            setAppIds(taskResponse.getAppIds());
+            setProcessId(taskResponse.getProcessId());
+            setVarPool(shellCommandExecutor.getVarPool());
+        } catch (InterruptedException e) {
+            logger.error("java task interrupted ", e);
+            setExitStatusCode(TaskConstants.EXIT_CODE_FAILURE);
+            Thread.currentThread().interrupt();
+        } catch (RunTypeNotFoundException e) {
+            logger.error(e.getMessage());
+            setExitStatusCode(TaskConstants.EXIT_CODE_FAILURE);
+            throw e;
+        } catch (Exception e) {
+            logger.error("java task failed ", e);
+            setExitStatusCode(TaskConstants.EXIT_CODE_FAILURE);
+            throw new TaskException("run java task error", e);
+        }
+    }
+
+    /**
+     * @description: Construct a shell command for the java Run mode
+     * @param: []
+     * @return: java.lang.String
+     **/

Review Comment:
   ```suggestion
        * @description: Construct a shell command for the java Run mode
        * @return: java.lang.String
        **/
   ```



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