[GitHub] [rocketmq-externals] odbozhou commented on a change in pull request #430: [ISSUE #427]feat(replicator):add consumer offset sync

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odbozhou commented on a change in pull request #430: [ISSUE #427]feat(replicator):add consumer offset sync
URL: https://github.com/apache/rocketmq-externals/pull/430#discussion_r341460257
 
 

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 File path: rocketmq-replicator/src/main/java/org/apache/rocketmq/replicator/MetaSourceTask.java
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+/*
+ * 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.rocketmq.replicator;
+
+import com.alibaba.fastjson.JSONObject;
+import io.openmessaging.KeyValue;
+import io.openmessaging.connector.api.data.DataEntryBuilder;
+import io.openmessaging.connector.api.data.EntryType;
+import io.openmessaging.connector.api.data.Field;
+import io.openmessaging.connector.api.data.FieldType;
+import io.openmessaging.connector.api.data.Schema;
+import io.openmessaging.connector.api.data.SourceDataEntry;
+import io.openmessaging.connector.api.source.SourceTask;
+import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.TimeUnit;
+import org.apache.rocketmq.client.exception.MQClientException;
+import org.apache.rocketmq.common.admin.ConsumeStats;
+import org.apache.rocketmq.common.admin.OffsetWrapper;
+import org.apache.rocketmq.common.message.MessageQueue;
+import org.apache.rocketmq.replicator.common.ConstDefine;
+import org.apache.rocketmq.replicator.common.Utils;
+import org.apache.rocketmq.replicator.config.ConfigUtil;
+import org.apache.rocketmq.replicator.config.TaskConfig;
+import org.apache.rocketmq.replicator.offset.OffsetSyncStore;
+import org.apache.rocketmq.replicator.schema.FieldName;
+import org.apache.rocketmq.tools.admin.DefaultMQAdminExt;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class MetaSourceTask extends SourceTask {
+
+    private static final Logger log = LoggerFactory.getLogger(RmqSourceTask.class);
+
+    private final String taskId;
+    private final TaskConfig config;
+    private DefaultMQAdminExt srcMQAdminExt;
+    private volatile boolean started = false;
+
+    private OffsetSyncStore store;
+
+    public MetaSourceTask() {
+        this.config = new TaskConfig();
+        this.taskId = Utils.createTaskId(Thread.currentThread().getName());
+    }
+
+    @Override public void start(KeyValue config) {
+        ConfigUtil.load(config, this.config);
+
+        startAdmin();
+
+        this.store = new OffsetSyncStore(this.srcMQAdminExt, this.config);
+        this.started = true;
+    }
+
+    @Override public void stop() {
+        if (started) {
+            started = false;
+        }
+    }
+
+    @Override public void pause() {
+
+    }
+
+    @Override public void resume() {
+
+    }
+
+    @Override public Collection<SourceDataEntry> poll() {
+        log.debug("polling...");
+        List<String> groups = JSONObject.parseArray(this.config.getTaskGroupList(), String.class);
+
+        if (groups == null) {
+            log.info("no group in task.");
+            try {
+                Thread.sleep(TimeUnit.SECONDS.toMillis(10));
+            } catch (InterruptedException e) {
+                e.printStackTrace();
 
 Review comment:
   Throw runtime exceptions or print logs better

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