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Posted to commits@inlong.apache.org by GitBox <gi...@apache.org> on 2022/10/18 06:01:35 UTC
[GitHub] [inlong] haibo-duan opened a new pull request, #6203: [INLONG-6176][Agent] Support collect data from Oracle
haibo-duan opened a new pull request, #6203:
URL: https://github.com/apache/inlong/pull/6203
### Prepare a Pull Request
*(Change the title refer to the following example)*
- Title Example: [INLONG-XYZ][Component] Title of the pull request
*(The following *XYZ* should be replaced by the actual [GitHub Issue](https://github.com/apache/inlong/issues) number)*
- Fixes #6176
### Motivation
*Explain here the context, and why you're making that change. What is the problem you're trying to solve?*
### Modifications
*Describe the modifications you've done.*
### Verifying this change
*(Please pick either of the following options)*
- [ ] This change is a trivial rework/code cleanup without any test coverage.
- [ ] This change is already covered by existing tests, such as:
*(please describe tests)*
- [ ] This change added tests and can be verified as follows:
*(example:)*
- *Added integration tests for end-to-end deployment with large payloads (10MB)*
- *Extended integration test for recovery after broker failure*
### Documentation
- Does this pull request introduce a new feature? (yes / no)
- If yes, how is the feature documented? (not applicable / docs / JavaDocs / not documented)
- If a feature is not applicable for documentation, explain why?
- If a feature is not documented yet in this PR, please create a follow-up issue for adding the documentation
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[GitHub] [inlong] dockerzhang commented on pull request #6203: [INLONG-6176][Agent] Support collect data from Oracle
Posted by GitBox <gi...@apache.org>.
dockerzhang commented on PR #6203:
URL: https://github.com/apache/inlong/pull/6203#issuecomment-1289905025
@haibo-duan here we need to add Oracle Source to the JobProfileDto.class. You can refer to MongoDB at https://github.com/apache/inlong/pull/5674.
maybe other sources you added in the agent also add the job definition, like PostgreSQL/SQLServer.
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[GitHub] [inlong] EMsnap commented on a diff in pull request #6203: [INLONG-6176][Agent] Support collect data from Oracle
Posted by GitBox <gi...@apache.org>.
EMsnap commented on code in PR #6203:
URL: https://github.com/apache/inlong/pull/6203#discussion_r1015126592
##########
inlong-agent/agent-plugins/src/main/java/org/apache/inlong/agent/plugin/sources/reader/OracleReader.java:
##########
@@ -0,0 +1,328 @@
+/*
+ * 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.inlong.agent.plugin.sources.reader;
+
+import com.google.common.base.Preconditions;
+import com.google.gson.Gson;
+import io.debezium.connector.oracle.OracleConnector;
+import io.debezium.engine.ChangeEvent;
+import io.debezium.engine.DebeziumEngine;
+import io.debezium.relational.history.FileDatabaseHistory;
+import org.apache.commons.lang3.StringUtils;
+import org.apache.commons.lang3.tuple.Pair;
+import org.apache.inlong.agent.conf.AgentConfiguration;
+import org.apache.inlong.agent.conf.JobProfile;
+import org.apache.inlong.agent.constant.AgentConstants;
+import org.apache.inlong.agent.constant.OracleConstants;
+import org.apache.inlong.agent.constant.SnapshotModeConstants;
+import org.apache.inlong.agent.message.DefaultMessage;
+import org.apache.inlong.agent.metrics.audit.AuditUtils;
+import org.apache.inlong.agent.plugin.Message;
+import org.apache.inlong.agent.plugin.sources.snapshot.OracleSnapshotBase;
+import org.apache.inlong.agent.plugin.utils.InLongDatabaseHistory;
+import org.apache.inlong.agent.plugin.utils.InLongFileOffsetBackingStore;
+import org.apache.inlong.agent.pojo.DebeziumFormat;
+import org.apache.inlong.agent.pojo.DebeziumOffset;
+import org.apache.inlong.agent.utils.AgentUtils;
+import org.apache.inlong.agent.utils.DebeziumOffsetSerializer;
+import org.apache.inlong.agent.utils.GsonUtil;
+import org.apache.kafka.connect.storage.FileOffsetBackingStore;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Properties;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.LinkedBlockingQueue;
+
+import static org.apache.inlong.agent.constant.CommonConstants.DEFAULT_MAP_CAPACITY;
+import static org.apache.inlong.agent.constant.CommonConstants.PROXY_KEY_DATA;
+
+/**
+ * Read data from Oracle database by SQL
+ */
+public class OracleReader extends AbstractReader {
+
+ public static final String ORACLE_READER_TAG_NAME = "AgentOracleMetric";
+ public static final String JOB_DATABASE_USER = "job.oracleJob.user";
+ public static final String JOB_DATABASE_PASSWORD = "job.oracleJob.password";
+ public static final String JOB_DATABASE_HOSTNAME = "job.oracleJob.hostname";
+ public static final String JOB_DATABASE_PORT = "job.oracleJob.port";
+ public static final String JOB_DATABASE_SNAPSHOT_MODE = "job.oracleJob.snapshot.mode";
+ public static final String JOB_DATABASE_SERVER_NAME = "job.oracleJob.serverName";
+ public static final String JOB_DATABASE_QUEUE_SIZE = "job.oracleJob.queueSize";
+ public static final String JOB_DATABASE_OFFSETS = "job.oracleJob.offsets";
+ public static final String JOB_DATABASE_OFFSET_SPECIFIC_OFFSET_FILE = "job.oracleJob.offset.specificOffsetFile";
+ public static final String JOB_DATABASE_OFFSET_SPECIFIC_OFFSET_POS = "job.oracleJob.offset.specificOffsetPos";
+ public static final String JOB_DATABASE_DBNAME = "job.oracleJob.dbname";
+ public static final String JOB_DATABASE_STORE_OFFSET_INTERVAL_MS = "job.oracleJob.offset.intervalMs";
+ public static final String JOB_DATABASE_STORE_HISTORY_FILENAME = "job.oracleJob.history.filename";
+
+ private static final Gson GSON = new Gson();
+ public static final String ORACLE = "oracle";
+
+ private static final Logger LOGGER = LoggerFactory.getLogger(SqlReader.class);
+
+ private final AgentConfiguration agentConf = AgentConfiguration.getAgentConf();
+
+ private String databaseStoreHistoryName;
+ private String instanceId;
+ private String dbName;
+ private String serverName;
+ private String userName;
+ private String password;
+ private String hostName;
+ private String port;
+ private String offsetFlushIntervalMs;
+ private String offsetStoreFileName;
+ private String snapshotMode;
+ private String offset;
+ private String specificOffsetFile;
+ private String specificOffsetPos;
+ private OracleSnapshotBase oracleSnapshot;
+ private boolean finished = false;
+ private ExecutorService executor;
+
+ /**
+ * pair.left : table name
+ * pair.right : actual data
+ */
+ private LinkedBlockingQueue<Pair<String, String>> oracleMessageQueue;
+ private JobProfile jobProfile;
+ private boolean destroyed = false;
+
+ public OracleReader() {
+ }
+
+ @Override
+ public Message read() {
+ if (!oracleMessageQueue.isEmpty()) {
+ return getOracleMessage();
+ } else {
+ return null;
+ }
+ }
+
+ /**
+ * poll message from buffer pool
+ *
+ * @return org.apache.inlong.agent.plugin.Message
+ */
+ private DefaultMessage getOracleMessage() {
+ // Retrieves and removes the head of this queue,
+ // or returns null if this queue is empty.
+ Pair<String, String> message = oracleMessageQueue.poll();
+ if (Objects.isNull(message)) {
+ return null;
+ }
+ Map<String, String> header = new HashMap<>(DEFAULT_MAP_CAPACITY);
+ header.put(PROXY_KEY_DATA, message.getKey());
+ return new DefaultMessage(GsonUtil.toJson(message.getValue()).getBytes(StandardCharsets.UTF_8), header);
+ }
+
+ public boolean isDestroyed() {
+ return destroyed;
+ }
+
+ @Override
+ public boolean isFinished() {
+ return finished;
+ }
+
+ @Override
+ public String getReadSource() {
+ return instanceId;
+ }
+
+ @Override
+ public void setReadTimeout(long mill) {
+
+ }
+
+ @Override
+ public void setWaitMillisecond(long millis) {
+
+ }
+
+ @Override
+ public String getSnapshot() {
+ if (oracleSnapshot != null) {
+ return oracleSnapshot.getSnapshot();
+ } else {
+ return StringUtils.EMPTY;
+ }
+ }
+
+ @Override
+ public void finishRead() {
+ this.finished = true;
+ }
+
+ @Override
+ public boolean isSourceExist() {
+ return true;
+ }
+
+ private String tryToInitAndGetHistoryPath() {
+ String historyPath = agentConf.get(
+ AgentConstants.AGENT_HISTORY_PATH, AgentConstants.DEFAULT_AGENT_HISTORY_PATH);
+ String parentPath = agentConf.get(
+ AgentConstants.AGENT_HOME, AgentConstants.DEFAULT_AGENT_HOME);
+ return AgentUtils.makeDirsIfNotExist(historyPath, parentPath).getAbsolutePath();
+ }
+
+ @Override
+ public void init(JobProfile jobConf) {
+ super.init(jobConf);
+ jobProfile = jobConf;
+ LOGGER.info("init oracle reader with jobConf {}", jobConf.toJsonStr());
+ userName = jobConf.get(JOB_DATABASE_USER);
+ password = jobConf.get(JOB_DATABASE_PASSWORD);
+ hostName = jobConf.get(JOB_DATABASE_HOSTNAME);
+ port = jobConf.get(JOB_DATABASE_PORT);
+ dbName = jobConf.get(JOB_DATABASE_DBNAME);
+ serverName = jobConf.get(JOB_DATABASE_SERVER_NAME);
+ instanceId = jobConf.getInstanceId();
+ offsetFlushIntervalMs = jobConf.get(JOB_DATABASE_STORE_OFFSET_INTERVAL_MS, "100000");
+ offsetStoreFileName = jobConf.get(JOB_DATABASE_STORE_HISTORY_FILENAME,
+ tryToInitAndGetHistoryPath()) + "/offset.dat" + instanceId;
+ snapshotMode = jobConf.get(JOB_DATABASE_SNAPSHOT_MODE, OracleConstants.INITIAL);
+ oracleMessageQueue = new LinkedBlockingQueue<>(jobConf.getInt(JOB_DATABASE_QUEUE_SIZE, 1000));
+ finished = false;
+
+ databaseStoreHistoryName = jobConf.get(JOB_DATABASE_STORE_HISTORY_FILENAME,
+ tryToInitAndGetHistoryPath()) + "/history.dat" + jobConf.getInstanceId();
+ offset = jobConf.get(JOB_DATABASE_OFFSETS, "");
+ specificOffsetFile = jobConf.get(JOB_DATABASE_OFFSET_SPECIFIC_OFFSET_FILE, "");
+ specificOffsetPos = jobConf.get(JOB_DATABASE_OFFSET_SPECIFIC_OFFSET_POS, "-1");
+
+ oracleSnapshot = new OracleSnapshotBase(offsetStoreFileName);
+ oracleSnapshot.save(offset, oracleSnapshot.getFile());
+
+ Properties props = getEngineProps();
+
+ DebeziumEngine<ChangeEvent<String, String>> engine = DebeziumEngine.create(
+ io.debezium.engine.format.Json.class)
+ .using(props)
+ .notifying((records, committer) -> {
+ try {
+ for (ChangeEvent<String, String> record : records) {
+ DebeziumFormat debeziumFormat = GSON
+ .fromJson(record.value(), DebeziumFormat.class);
+ oracleMessageQueue.put(Pair.of(debeziumFormat.getSource().getTable(), record.value()));
+ committer.markProcessed(record);
+ }
+ committer.markBatchFinished();
+ long dataSize = records.stream().mapToLong(c -> c.value().length()).sum();
+ AuditUtils.add(AuditUtils.AUDIT_ID_AGENT_READ_SUCCESS, inlongGroupId, inlongStreamId,
+ System.currentTimeMillis(), records.size(), dataSize);
+ readerMetric.pluginReadSuccessCount.addAndGet(records.size());
+ readerMetric.pluginReadCount.addAndGet(records.size());
+ } catch (Exception e) {
+ readerMetric.pluginReadFailCount.addAndGet(records.size());
+ readerMetric.pluginReadCount.addAndGet(records.size());
+ LOGGER.error("parse binlog message error", e);
+ }
+ })
+ .using((success, message, error) -> {
+ if (!success) {
+ LOGGER.error("oracle job with jobConf {} has error {}", instanceId, message, error);
+ }
+ }).build();
+
+ executor = Executors.newSingleThreadExecutor();
+ executor.execute(engine);
+
+ LOGGER.info("get initial snapshot of job {}, snapshot {}", instanceId, getSnapshot());
+ }
+
+ private String serializeOffset() {
Review Comment:
DUPLICATE CODE IN MONGODB AND PG, CAN YOU abstract this?
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[GitHub] [inlong] EMsnap merged pull request #6203: [INLONG-6176][Agent] Support collect data from Oracle
Posted by GitBox <gi...@apache.org>.
EMsnap merged PR #6203:
URL: https://github.com/apache/inlong/pull/6203
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[GitHub] [inlong] EMsnap commented on a diff in pull request #6203: [INLONG-6176][Agent] Support collect data from Oracle
Posted by GitBox <gi...@apache.org>.
EMsnap commented on code in PR #6203:
URL: https://github.com/apache/inlong/pull/6203#discussion_r1005412527
##########
inlong-agent/agent-plugins/src/main/java/org/apache/inlong/agent/plugin/sources/reader/OracleReader.java:
##########
@@ -0,0 +1,230 @@
+/*
+ * 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.inlong.agent.plugin.sources.reader;
+
+import org.apache.commons.codec.binary.Base64;
+import org.apache.commons.lang3.CharUtils;
+import org.apache.commons.lang3.StringUtils;
+import org.apache.inlong.agent.conf.JobProfile;
+import org.apache.inlong.agent.message.DefaultMessage;
+import org.apache.inlong.agent.metrics.audit.AuditUtils;
+import org.apache.inlong.agent.plugin.Message;
+import org.apache.inlong.agent.utils.AgentDbUtils;
+import org.apache.inlong.agent.utils.AgentUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.nio.charset.StandardCharsets;
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.util.ArrayList;
+import java.util.List;
+
+import static java.sql.Types.BINARY;
+import static java.sql.Types.BLOB;
+import static java.sql.Types.LONGVARBINARY;
+import static java.sql.Types.VARBINARY;
+
+/**
+ * Read data from Oracle database by SQL
+ */
+public class OracleReader extends AbstractReader {
+
+ public static final String ORACLE_READER_TAG_NAME = "AgentOracleMetric";
+ public static final String JOB_DATABASE_USER = "job.oracleJob.user";
+ public static final String JOB_DATABASE_PASSWORD = "job.oracleJob.password";
+ public static final String JOB_DATABASE_HOSTNAME = "job.oracleJob.hostname";
+ public static final String JOB_DATABASE_PORT = "job.oracleJob.port";
+ public static final String JOB_DATABASE_SID = "job.oracleJob.sid";
+ public static final String DEFAULT_JOB_DATABASE_SID = "";
+ public static final String JOB_DATABASE_SERVICE_NAME = "job.oracleJob.serviceName";
+ public static final String JOB_DATABASE_BATCH_SIZE = "job.oracleJob.batchSize";
+ public static final int DEFAULT_JOB_DATABASE_BATCH_SIZE = 1000;
+ public static final String JOB_DATABASE_DRIVER_CLASS = "job.database.driverClass";
+ public static final String DEFAULT_JOB_DATABASE_DRIVER_CLASS = "oracle.jdbc.driver.OracleDriver";
+ public static final String STD_FIELD_SEPARATOR_SHORT = "\001";
+ public static final String JOB_DATABASE_SEPARATOR = "job.sql.separator";
+ // pre-set sql lines, commands like "set xxx=xx;"
+ public static final String JOB_DATABASE_TYPE = "job.database.type";
+ public static final String ORACLE = "oracle";
+ private static final Logger LOGGER = LoggerFactory.getLogger(SqlReader.class);
+ private static final String[] NEW_LINE_CHARS = new String[]{String.valueOf(CharUtils.CR),
+ String.valueOf(CharUtils.LF)};
+ private static final String[] EMPTY_CHARS = new String[]{StringUtils.EMPTY, StringUtils.EMPTY};
+
+ private final String sql;
+
+ private PreparedStatement preparedStatement;
+ private Connection conn;
+ private ResultSet resultSet;
+ private int columnCount;
+
+ // column types
+ private String[] columnTypeNames;
+ private int[] columnTypeCodes;
+ private boolean finished = false;
+ private String separator;
+
+ public OracleReader(String sql) {
+ this.sql = sql;
+ }
+
+ @Override
+ public Message read() {
+ try {
+ if (!resultSet.next()) {
+ finished = true;
+ return null;
+ }
+ final List<String> lineColumns = new ArrayList<>();
+ for (int i = 1; i <= columnCount; i++) {
+ final String dataValue;
+ /* handle special blob value, encode with base64, BLOB=2004 */
+ final int typeCode = columnTypeCodes[i - 1];
+ final String typeName = columnTypeNames[i - 1];
+
+ // binary type
+ if (typeCode == BLOB || typeCode == BINARY || typeCode == VARBINARY
+ || typeCode == LONGVARBINARY || typeName.contains("BLOB")) {
+ final byte[] data = resultSet.getBytes(i);
+ dataValue = new String(Base64.encodeBase64(data, false), StandardCharsets.UTF_8);
+ } else {
+ // non-binary type
+ dataValue = StringUtils.replaceEachRepeatedly(resultSet.getString(i),
+ NEW_LINE_CHARS, EMPTY_CHARS);
+ }
+ lineColumns.add(dataValue);
+ }
+ long dataSize = lineColumns.stream().mapToLong(column -> column.length()).sum();
+ AuditUtils.add(AuditUtils.AUDIT_ID_AGENT_READ_SUCCESS, inlongGroupId, inlongStreamId,
+ System.currentTimeMillis(), 1, dataSize);
+ readerMetric.pluginReadSuccessCount.incrementAndGet();
+ readerMetric.pluginReadCount.incrementAndGet();
+ return generateMessage(lineColumns);
+ } catch (Exception ex) {
+ LOGGER.error("error while reading data", ex);
+ readerMetric.pluginReadFailCount.incrementAndGet();
+ readerMetric.pluginReadCount.incrementAndGet();
+ throw new RuntimeException(ex);
+ }
+ }
+
+ private Message generateMessage(List<String> lineColumns) {
+ return new DefaultMessage(StringUtils.join(lineColumns, separator).getBytes(StandardCharsets.UTF_8));
+ }
+
+ @Override
+ public boolean isFinished() {
+ return finished;
+ }
+
+ @Override
+ public String getReadSource() {
+ return sql;
+ }
+
+ @Override
+ public void setReadTimeout(long mill) {
+
+ }
+
+ @Override
+ public void setWaitMillisecond(long millis) {
+
+ }
+
+ @Override
+ public String getSnapshot() {
+ return StringUtils.EMPTY;
+ }
+
+ @Override
+ public void finishRead() {
+ destroy();
+ }
+
+ @Override
+ public boolean isSourceExist() {
+ return true;
+ }
+
+ @Override
+ public void init(JobProfile jobConf) {
+ super.init(jobConf);
+ int batchSize = jobConf.getInt(JOB_DATABASE_BATCH_SIZE, DEFAULT_JOB_DATABASE_BATCH_SIZE);
+ String userName = jobConf.get(JOB_DATABASE_USER);
Review Comment:
finalize string
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[GitHub] [inlong] GanfengTan commented on a diff in pull request #6203: [INLONG-6176][Agent] Support collect data from Oracle
Posted by GitBox <gi...@apache.org>.
GanfengTan commented on code in PR #6203:
URL: https://github.com/apache/inlong/pull/6203#discussion_r1015176266
##########
inlong-agent/agent-plugins/src/main/java/org/apache/inlong/agent/plugin/sources/reader/OracleReader.java:
##########
@@ -0,0 +1,328 @@
+/*
+ * 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.inlong.agent.plugin.sources.reader;
+
+import com.google.common.base.Preconditions;
+import com.google.gson.Gson;
+import io.debezium.connector.oracle.OracleConnector;
+import io.debezium.engine.ChangeEvent;
+import io.debezium.engine.DebeziumEngine;
+import io.debezium.relational.history.FileDatabaseHistory;
+import org.apache.commons.lang3.StringUtils;
+import org.apache.commons.lang3.tuple.Pair;
+import org.apache.inlong.agent.conf.AgentConfiguration;
+import org.apache.inlong.agent.conf.JobProfile;
+import org.apache.inlong.agent.constant.AgentConstants;
+import org.apache.inlong.agent.constant.OracleConstants;
+import org.apache.inlong.agent.constant.SnapshotModeConstants;
+import org.apache.inlong.agent.message.DefaultMessage;
+import org.apache.inlong.agent.metrics.audit.AuditUtils;
+import org.apache.inlong.agent.plugin.Message;
+import org.apache.inlong.agent.plugin.sources.snapshot.OracleSnapshotBase;
+import org.apache.inlong.agent.plugin.utils.InLongDatabaseHistory;
+import org.apache.inlong.agent.plugin.utils.InLongFileOffsetBackingStore;
+import org.apache.inlong.agent.pojo.DebeziumFormat;
+import org.apache.inlong.agent.pojo.DebeziumOffset;
+import org.apache.inlong.agent.utils.AgentUtils;
+import org.apache.inlong.agent.utils.DebeziumOffsetSerializer;
+import org.apache.inlong.agent.utils.GsonUtil;
+import org.apache.kafka.connect.storage.FileOffsetBackingStore;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Properties;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.LinkedBlockingQueue;
+
+import static org.apache.inlong.agent.constant.CommonConstants.DEFAULT_MAP_CAPACITY;
+import static org.apache.inlong.agent.constant.CommonConstants.PROXY_KEY_DATA;
+
+/**
+ * Read data from Oracle database by SQL
+ */
Review Comment:
Please, update this doc
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