[GitHub] [rocketmq] wqliang commented on a change in pull request #1422: [RIP-16]Support request/response pattern

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wqliang commented on a change in pull request #1422: [RIP-16]Support request/response pattern
URL: https://github.com/apache/rocketmq/pull/1422#discussion_r326935307
 
 

 ##########
 File path: example/src/main/java/org/apache/rocketmq/example/rpc/RequestProducer.java
 ##########
 @@ -0,0 +1,52 @@
+/*
+ * 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.example.rpc;
+
+import org.apache.rocketmq.client.exception.MQClientException;
+import org.apache.rocketmq.client.log.ClientLogger;
+import org.apache.rocketmq.client.producer.DefaultMQProducer;
+import org.apache.rocketmq.common.message.Message;
+import org.apache.rocketmq.logging.InternalLogger;
+import org.apache.rocketmq.remoting.common.RemotingHelper;
+
+public class RequestProducer {
+    private static final InternalLogger log = ClientLogger.getLog();
+
+    public static void main(String[] args) throws MQClientException, InterruptedException {
+        String producerGroup = "please_rename_unique_group_name";
+        String topic = "RequestTopic";
+        long ttl = 3000;
+
+        DefaultMQProducer producer = new DefaultMQProducer(producerGroup);
+        producer.start();
+
+        try {
+            Message msg = new Message(topic,
+                "",
+                "Hello world".getBytes(RemotingHelper.DEFAULT_CHARSET));
+
+            long begin = System.currentTimeMillis();
+            Message retMsg = producer.request(msg, ttl);
+            long cost = System.currentTimeMillis() - begin;
+            System.err.printf("request to <%s> cost: %d replyMessage: %s %n", topic, cost, retMsg);
 
 Review comment:
   yes, i'll correct it.

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