[GitHub] [incubator-seatunnel] asdf2014 commented on a change in pull request #970: [SeaTunnel#969]Add Druid Flink Sink plugin

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

asdf2014 commented on a change in pull request #970:
URL: https://github.com/apache/incubator-seatunnel/pull/970#discussion_r780873666



##########
File path: seatunnel-connectors/seatunnel-connector-flink-druid/src/main/java/org/apache/seatunnel/flink/sink/DruidOutputFormat.java
##########
@@ -0,0 +1,208 @@
+/*
+ * 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.seatunnel.flink.sink;
+
+import com.alibaba.fastjson.JSON;
+import com.alibaba.fastjson.JSONObject;
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.MapperFeature;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializationFeature;
+import org.apache.druid.data.input.MaxSizeSplitHintSpec;
+import org.apache.druid.data.input.impl.CsvInputFormat;
+import org.apache.druid.data.input.impl.DimensionsSpec;
+import org.apache.druid.data.input.impl.InlineInputSource;
+import org.apache.druid.data.input.impl.TimestampSpec;
+import org.apache.druid.indexing.common.task.batch.parallel.ParallelIndexIOConfig;
+import org.apache.druid.indexing.common.task.batch.parallel.ParallelIndexIngestionSpec;
+import org.apache.druid.indexing.common.task.batch.parallel.ParallelIndexSupervisorTask;
+import org.apache.druid.indexing.common.task.batch.parallel.ParallelIndexTuningConfig;
+import org.apache.druid.java.util.common.granularity.Granularities;
+import org.apache.druid.segment.indexing.DataSchema;
+import org.apache.druid.segment.indexing.granularity.UniformGranularitySpec;
+import org.apache.flink.api.common.io.RichOutputFormat;
+import org.apache.flink.configuration.Configuration;
+import org.apache.flink.types.Row;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.OutputStream;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.nio.charset.StandardCharsets;
+import java.util.Arrays;
+import java.util.Collections;
+
+import static org.apache.flink.api.java.io.CsvInputFormat.DEFAULT_FIELD_DELIMITER;
+import static org.apache.flink.api.java.io.CsvInputFormat.DEFAULT_LINE_DELIMITER;
+
+public class DruidOutputFormat extends RichOutputFormat<Row> {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(DruidOutputFormat.class);
+
+    private final transient StringBuffer data;
+    private final String coordinatorURL;
+    private final String datasource;
+
+    public DruidOutputFormat(String coordinatorURL, String datasource) {
+        this.data = new StringBuffer();
+        this.coordinatorURL = coordinatorURL;
+        this.datasource = datasource;
+    }
+
+    @Override
+    public void open(int taskNumber, int numTasks) {
+    }
+
+    @Override
+    public void configure(Configuration parameters) {
+    }
+
+    @Override
+    public void writeRecord(Row element) {
+        int fieldIndex = element.getArity();
+        for (int i = 0; i < fieldIndex; i++) {
+            Object v = element.getField(i);
+            if (i != 0) {
+                this.data.append(DEFAULT_FIELD_DELIMITER);
+            }
+            if (v != null) {
+                this.data.append(v.toString());
+            }
+        }
+        this.data.append(DEFAULT_LINE_DELIMITER);
+    }
+
+    @Override
+    public void close() throws IOException {
+        ParallelIndexIOConfig ioConfig = parallelIndexIOConfig();
+        ParallelIndexTuningConfig tuningConfig = tuningConfig();
+        ParallelIndexSupervisorTask indexTask = parallelIndexSupervisorTask(ioConfig, tuningConfig);
+        ObjectMapper mapper = new ObjectMapper();
+        mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
+        mapper.configure(MapperFeature.AUTO_DETECT_GETTERS, false);
+        mapper.configure(MapperFeature.AUTO_DETECT_FIELDS, false);
+        mapper.configure(MapperFeature.AUTO_DETECT_IS_GETTERS, false);
+        mapper.configure(MapperFeature.AUTO_DETECT_SETTERS, false);
+        mapper.configure(SerializationFeature.INDENT_OUTPUT, false);
+        mapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
+        String taskJSON = mapper.writeValueAsString(indexTask);
+        JSONObject jsonObject = JSON.parseObject(taskJSON);
+        jsonObject.remove("id");
+        jsonObject.remove("groupId");
+        jsonObject.remove("resource");
+        JSONObject spec = jsonObject.getJSONObject("spec");
+        spec.remove("tuningConfig");
+        jsonObject.put("spec", spec);
+        taskJSON = jsonObject.toJSONString();
+
+        URL url = new URL(this.coordinatorURL + "druid/indexer/v1/task");
+        HttpURLConnection con = (HttpURLConnection) url.openConnection();
+        con.setRequestMethod("POST");
+        con.setRequestProperty("Content-Type", "application/json");
+        con.setRequestProperty("Accept", "application/json, text/plain, */*");
+        con.setDoOutput(true);
+        try (OutputStream os = con.getOutputStream()) {
+            byte[] input = taskJSON.getBytes(StandardCharsets.UTF_8);
+            os.write(input, 0, input.length);
+        }
+        try (BufferedReader br = new BufferedReader(new InputStreamReader(con.getInputStream(), StandardCharsets.UTF_8))) {
+            StringBuilder response = new StringBuilder();
+            String responseLine;
+            while ((responseLine = br.readLine()) != null) {
+                response.append(responseLine.trim());
+            }
+            LOGGER.info("Druid write task has been sent, and the response is {}", response.toString());
+        }
+    }
+
+    private ParallelIndexSupervisorTask parallelIndexSupervisorTask(ParallelIndexIOConfig ioConfig, ParallelIndexTuningConfig tuningConfig) {
+        return new ParallelIndexSupervisorTask(
+                null,
+                null,
+                null,
+                new ParallelIndexIngestionSpec(
+                        new DataSchema(
+                                this.datasource,
+                                new TimestampSpec("ts", "auto", null),
+                                new DimensionsSpec(Collections.emptyList()),
+                                null,
+                                new UniformGranularitySpec(Granularities.HOUR, Granularities.MINUTE, false, null),
+                                null
+                        ),
+                        ioConfig,
+                        tuningConfig
+                ),
+                null
+        );
+    }
+
+    private ParallelIndexIOConfig parallelIndexIOConfig() {
+        return new ParallelIndexIOConfig(
+                null,
+                new InlineInputSource(this.data.toString()),
+                new CsvInputFormat(
+                        Arrays.asList("name", "ts"),
+                        "|",
+                        null,
+                        false,
+                        0
+                ),
+                false,
+                null
+        );
+    }
+
+    private ParallelIndexTuningConfig tuningConfig() {
+        return new ParallelIndexTuningConfig(
+                null,

Review comment:
       Hi @leo65535 , thanks for your comment. Unfortunately, this is the only one. May I ask what's your concern




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