本文主要是讲在Centos中安装RocketMQ并做简单的示例。如果你按照本文安装100%是可以成功的，如果按照阿里官方的说明，那只能呵呵了~
安装
官方地址为：https://rocketmq.apache.org/d...
本人安装如下：
//下载最新的rocketmq
wget http://apache-mirror.8birdsvideo.com/rocketmq/4.4.0/rocketmq-all-4.4.0-bin-release.zip
//解压
unzip rocketmq-all-4.4.0-bin-release.zip
//切换到mq目录
cd rocketmq-all-4.4.0-bin-release
//name server 启动
nohup ./bin/mqnamesrv -n 111.231.XX.XX:9876 &
//-c conf/broker.conf autoCreateTopicEnable=true 参数需要带上，不然topic需要手动创建
nohup sh bin/mqbroker -n 111.231.XX.XX:9876 -c conf/broker.conf autoCreateTopicEnable=true &配置,切换到mq的bin目录下
cd rocketmq-all-4.4.0-bin-release/binrocketmq默认最低内存为4g,机器内存不够用的话，找到runserver.sh和runbroker.sh编辑如下：
JAVA_OPT="${JAVA_OPT} -server -Xms256m -Xmx256m -Xmn125m -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=320m"
运行
运行官方demo，发现如下错误：
21:20:22.249 [NettyClientSelector_1] INFO RocketmqRemoting - closeChannel: close the connection to remote address[] result: true
org.apache.rocketmq.remoting.exception.RemotingTooMuchRequestException: sendDefaultImpl call timeout
at org.apache.rocketmq.client.impl.producer.DefaultMQProducerImpl.sendDefaultImpl(DefaultMQProducerImpl.java:640)
at org.apache.rocketmq.client.impl.producer.DefaultMQProducerImpl.send(DefaultMQProducerImpl.java:1310)
at org.apache.rocketmq.client.impl.producer.DefaultMQProducerImpl.send(DefaultMQProducerImpl.java:1256)
at org.apache.rocketmq.client.producer.DefaultMQProducer.send(DefaultMQProducer.java:339)
at org.apache.rocketmq.example.simple.Producer.main(Producer.java:40)运行以下命令查看broker配置并写入远程ip地址：
//查看broker配置
sh ./bin/mqbroker -m
//关闭broker
sh bin/mqshutdown broker
//将本机远程ip写入配置文件中
echo 'brokerIP1=111.231.XX.XX' > conf/broker.properties
//重新启动broker
nohup sh bin/mqbroker -n 111.231.XX.XX:9876 -c conf/broker.conf autoCreateTopicEnable=true &管理控制台安装
Git地址：https://github.com/apache/roc...
git clone [email protected]:apache/rocketmq-externals.git
cd rocketmq-external/rocketmq-console/
mvn clean package -Dmaven.test.skip=true
打完包后，运行以下命令
java -jar rocketmq-console-ng-1.0.1.jar --server.port=12181 --rocketmq.config.namesrvAddr=111.231.XX.XX:9876
打开 http://localhost:12181访问控制台，像如下
在Procuder这个页面查询时会出现如下异常：
java.lang.RuntimeException: org.apache.rocketmq.client.exception.MQBrokerException: CODE: 1 DESC: the producer group[] not exist
For more information, please visit the url, http://rocketmq.apache.org/docs/faq/
at com.google.common.base.Throwables.propagate(Throwables.java:160)
at org.apache.rocketmq.console.service.impl.ProducerServiceImpl.getProducerConnection(ProducerServiceImpl.java:38)
at org.apache.rocketmq.console.controller.ProducerController.producerConnection(ProducerController.java:39)
请把代码中producer.shutdown()这句注掉，生产环境中请加上。
//producer.shutdown();代码示例（官方）
生产者
package org.apache.rocketmq.example.simple;
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;
public class Producer {
public static void main(String[] args) throws MQClientException, InterruptedException {
DefaultMQProducer producer = new DefaultMQProducer("ProducerGroupName");
producer.setNamesrvAddr("111.231.XX.XX:9876");
producer.start();
for (int i = 0; i < 10; i++)
try {
{
Message msg = new Message("TopicTest",
"TagA",
"OrderID188",
"Hello world".getBytes(RemotingHelper.DEFAULT_CHARSET));
SendResult sendResult = producer.send(msg);
System.out.printf("%s%n", sendResult);
}
} catch (Exception e) {
e.printStackTrace();
}
//producer.shutdown();
}
}
消费者
package org.apache.rocketmq.example.simple;
import java.util.List;
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;
public class PushConsumer {
public static void main(String[] args) throws InterruptedException, MQClientException {
DefaultMQPushConsumer consumer = new DefaultMQPushConsumer("CID_JODIE_1");
consumer.subscribe("TopicTest", "*");
consumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_FIRST_OFFSET);
//wrong time format 2017_0422_221800
//consumer.setConsumeTimestamp("20181109221800");
consumer.setNamesrvAddr("111.231.XX.XX:9876");
consumer.registerMessageListener(new MessageListenerConcurrently() {
@Override
public ConsumeConcurrentlyStatus consumeMessage(List msgs, ConsumeConcurrentlyContext context) {
System.out.printf("%s Receive New Messages: %s %n", Thread.currentThread().getName(), msgs);
return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
}
});
consumer.start();
System.out.printf("Consumer Started.%n");
}
}
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