rocketmq学习笔记 一 hello world

早就听说过rocketmq，一直没时间去研究它

最近打算从hello world开始，，深入的学习rocketmq 

0.git下载源码本地编译

git地址  https://github.com/alibaba/RocketMQ.git

下载完成后执行mvn 命令 构建工程    

mvn -Dmaven.test.skip=true clean package install assembly:assembly -U

1. 从target目录中，解压  alibaba-rocketmq-broker.tar.gz    启动nameServer 和 brokerServer 

tar -xzvf alibaba-rocketmq-broker.tar.gz 

./mqnamesrv &

./mqbroker -n 127.0.0.1:9876 &

2.执行example中的例子  发送消息

product

/**
 * 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 com.alibaba.rocketmq.example.quickstart;

import com.alibaba.rocketmq.client.exception.MQClientException;
import com.alibaba.rocketmq.client.producer.DefaultMQProducer;
import com.alibaba.rocketmq.client.producer.LocalTransactionExecuter;
import com.alibaba.rocketmq.client.producer.LocalTransactionState;
import com.alibaba.rocketmq.client.producer.SendResult;
import com.alibaba.rocketmq.common.message.Message;
import com.alibaba.rocketmq.remoting.common.RemotingHelper;

public class Producer {
    public static void main(String[] args) throws MQClientException, InterruptedException {
        DefaultMQProducer producer = new DefaultMQProducer("please_rename_unique_group_name");
        producer.setNamesrvAddr("127.0.0.1:9876");
        producer.start();

        for (int i = 0; i < 100; i++) {
            try {
                Message msg = new Message("TopicTest",// topic
                        "TagA",// tag
                        ("Hello RocketMQ " + i).getBytes(RemotingHelper.DEFAULT_CHARSET)// body
                );
                SendResult sendResult = producer.send(msg);
                LocalTransactionExecuter tranExecuter = new LocalTransactionExecuter() {

                    @Override
                    public LocalTransactionState executeLocalTransactionBranch(Message msg, Object arg) {
                        // TODO Auto-generated method stub
                        return null;
                    }
                };

                //producer.sendMessageInTransaction(msg, tranExecuter, arg)
                System.out.println(sendResult);
            } catch (Exception e) {
                e.printStackTrace();
                Thread.sleep(1000);
            }
        }

        producer.shutdown();
    }
}

3.查看broker中topic信息

mqadmin查看信息，topic已经存在了

4.接着执行example consumer

/**
 * 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 com.alibaba.rocketmq.example.quickstart;

import com.alibaba.rocketmq.client.consumer.DefaultMQPushConsumer;
import com.alibaba.rocketmq.client.consumer.listener.ConsumeConcurrentlyContext;
import com.alibaba.rocketmq.client.consumer.listener.ConsumeConcurrentlyStatus;
import com.alibaba.rocketmq.client.consumer.listener.MessageListenerConcurrently;
import com.alibaba.rocketmq.client.exception.MQClientException;
import com.alibaba.rocketmq.common.consumer.ConsumeFromWhere;
import com.alibaba.rocketmq.common.message.MessageExt;

import java.io.UnsupportedEncodingException;
import java.util.List;

public class Consumer {

    public static void main(String[] args) throws InterruptedException, MQClientException {
        DefaultMQPushConsumer consumer = new DefaultMQPushConsumer("please_rename_unique_group_name_4");

        consumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_FIRST_OFFSET);
        
        consumer.setNamesrvAddr("127.0.0.1:9876");
        
        consumer.subscribe("TopicTest", "*");

        consumer.registerMessageListener(new MessageListenerConcurrently() {

            @Override
            public ConsumeConcurrentlyStatus consumeMessage(List<MessageExt> msgs,
                                                            ConsumeConcurrentlyContext context) {
                System.out.println(Thread.currentThread().getName() + " Receive New Messages: " + msgs);
                for(MessageExt me:msgs){
                	try {
						System.out.println(new String(me.getBody(),"utf-8"));
					} catch (UnsupportedEncodingException e) {
						e.printStackTrace();
					}
                }
                return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
            }
        });

        consumer.start();

        System.out.println("Consumer Started.");
    }
}

ok，到这里，hello world 已经成功了