RocketMQ 学习之四 —— RocketMQ Web管理界面

系统管理员 2022-02-15 13:53 1732阅读 0赞

**目录**

进入实战

生产者代码：

消费者代码：

自动创建了 topic

消费组：

发送的消息：

手动发信息：

--------------------

前一篇 讲了 Web 管理界面：[https://blog.csdn.net/ruanhao1203/article/details/89451754\#5%E3%80%81Rocket%20Web%E7%AE%A1%E7%90%86%E7%95%8C%E9%9D%A2][https_blog.csdn.net_ruanhao1203_article_details_89451754_5_E3_80_81Rocket_20Web_E7_AE_A1_E7_90_86_E7_95_8C_E9_9D_A2]

# 进入实战 #

往节点1（10.24.54.241） 发送数据，并接收数据。

## 生产者代码： ##

/*
     * 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.quickstart;
    
    import org.apache.rocketmq.client.exception.MQClientException;
    import org.apache.rocketmq.client.producer.DefaultMQProducer;
    import org.apache.rocketmq.client.producer.SendResult;
    import org.apache.rocketmq.common.message.Message;
    import org.apache.rocketmq.remoting.common.RemotingHelper;
    
    /**
     * This class demonstrates how to send messages to brokers using provided {@link DefaultMQProducer}.
     */
    public class TestProducer {
        public static void main(String[] args) throws MQClientException, InterruptedException {
    
            /*
             * Instantiate with a producer group name.
             */
            DefaultMQProducer producer = new DefaultMQProducer("firstGroupName");
            producer.setNamesrvAddr("10.24.54.241:9876;10.24.54.242:9876");
            /*
             * Specify name server addresses.
             * <p/>
             *
             * Alternatively, you may specify name server addresses via exporting environmental variable: NAMESRV_ADDR
             * <pre>
             * {@code
             * producer.setNamesrvAddr("name-server1-ip:9876;name-server2-ip:9876");
             * }
             * </pre>
             */
    
            /*
             * Launch the instance.
             */
            producer.start();
    
            for (int i = 0; i < 1000; i++) {
                try {
    
                    /*
                     * Create a message instance, specifying topic, tag and message body.
                     */
                    Message msg = new Message("TestTopic1" /* Topic */,
                        "TagA" /* Tag */,
                        ("Hello RocketMQ " + i).getBytes(RemotingHelper.DEFAULT_CHARSET) /* Message body */
                    );
    
                    /*
                     * Call send message to deliver message to one of brokers.
                     */
                    SendResult sendResult = producer.send(msg);
    
                    System.out.printf("%s%n", sendResult);
                } catch (Exception e) {
                    e.printStackTrace();
                    Thread.sleep(1000);
                }
            }
    
            /*
             * Shut down once the producer instance is not longer in use.
             */
            producer.shutdown();
        }
    }

运行结果：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3J1YW5oYW8xMjAz_size_16_color_FFFFFF_t_70][]

## 消费者代码： ##

/*
     * 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.quickstart;
    
    import org.apache.rocketmq.client.consumer.DefaultMQPushConsumer;
    import org.apache.rocketmq.client.consumer.listener.ConsumeConcurrentlyContext;
    import org.apache.rocketmq.client.consumer.listener.ConsumeConcurrentlyStatus;
    import org.apache.rocketmq.client.consumer.listener.MessageListenerConcurrently;
    import org.apache.rocketmq.client.exception.MQClientException;
    import org.apache.rocketmq.common.consumer.ConsumeFromWhere;
    import org.apache.rocketmq.common.message.MessageExt;
    
    import java.util.List;
    
    /**
     * This example shows how to subscribe and consume messages using providing {@link DefaultMQPushConsumer}.
     */
    public class TestConsumer {
    
        public static void main(String[] args) throws InterruptedException, MQClientException {
    
            /*
             * Instantiate with specified consumer group name.
             */
            DefaultMQPushConsumer consumer = new DefaultMQPushConsumer("firstGroupName");
            consumer.setNamesrvAddr("10.24.54.241:9876;10.24.54.242:9876");
            /*
             * Specify name server addresses.
             * <p/>
             *
             * Alternatively, you may specify name server addresses via exporting environmental variable: NAMESRV_ADDR
             * <pre>
             * {@code
             * consumer.setNamesrvAddr("name-server1-ip:9876;name-server2-ip:9876");
             * }
             * </pre>
             */
    
            /*
             * Specify where to start in case the specified consumer group is a brand new one.
             */
            consumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_FIRST_OFFSET);
    
            /*
             * Subscribe one more more topics to consume.
             */
            consumer.subscribe("TestTopic1", "*");
    
            /*
             *  Register callback to execute on arrival of messages fetched from brokers.
             */
            consumer.registerMessageListener(new MessageListenerConcurrently() {
    
                @Override
                public ConsumeConcurrentlyStatus consumeMessage(List<MessageExt> msgs,
                    ConsumeConcurrentlyContext context) {
                    System.out.printf("%s Receive New Messages: %s %n", Thread.currentThread().getName(), msgs);
                    return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
                }
            });
    
            /*
             *  Launch the consumer instance.
             */
            consumer.start();
    
            System.out.printf("Consumer Started.%n");
        }
    }

运行结果：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3J1YW5oYW8xMjAz_size_16_color_FFFFFF_t_70 1][]

## 自动创建了 topic  ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3J1YW5oYW8xMjAz_size_16_color_FFFFFF_t_70 2][]

## 消费组： ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3J1YW5oYW8xMjAz_size_16_color_FFFFFF_t_70 3][]

## 发送的消息： ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3J1YW5oYW8xMjAz_size_16_color_FFFFFF_t_70 4][]

## 手动发信息： ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3J1YW5oYW8xMjAz_size_16_color_FFFFFF_t_70 5][]

[https_blog.csdn.net_ruanhao1203_article_details_89451754_5_E3_80_81Rocket_20Web_E7_AE_A1_E7_90_86_E7_95_8C_E9_9D_A2]: https://blog.csdn.net/ruanhao1203/article/details/89451754#5%E3%80%81Rocket%20Web%E7%AE%A1%E7%90%86%E7%95%8C%E9%9D%A2
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3J1YW5oYW8xMjAz_size_16_color_FFFFFF_t_70]: /images/20220215/5b82de3699c94d90a171bd5dfbf53894.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3J1YW5oYW8xMjAz_size_16_color_FFFFFF_t_70 1]: /images/20220215/eb5b8ee873d5404bb8f6bbaf70f46420.png
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