docker启动rabbitmq以及使用方式详解

目录

• 搜索rabbitmq镜像
• 下载镜像
• 启动容器
• 打印容器
• 访问RabbitMQ Management
• 编写生产者类
• 消费者
• 工作队列
• RabbitMqUtils工具类
• 启动2个工作线程
• 启动发送线程
• 消息应答机制
• 生产者
• 消费者
• 模拟
• 不公平分发
• 总结

搜索rabbitmq镜像

docker search rabbitmq:management

下载镜像

docker pull rabbitmq:management

启动容器

docker run -d –hostname localhost –name rabbitmq -p 15672:15672 -p 5672:5672 rabbitmq:management

打印容器

docker logs rabbitmq

访问RabbitMQ Management

http://localhost:15672

账户密码默认:guest

编写生产者类

package com.xun.rabbitmqdemo.example;

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import java.io.IOException;
import java.util.concurrent.TimeoutException;

public class Producer {
private final static String QUEUE_NAME = \”hello\”;
public static void main(String[] args) throws IOException, TimeoutException {
ConnectionFactory factory = new ConnectionFactory();
factory.setUsername(\”guest\”);
factory.setPassword(\”guest\”);
factory.setHost(\”localhost\”);
factory.setPort(5672);
factory.setVirtualHost(\”/\”);

Connection connection = factory.newConnection();

Channel channel = connection.createChannel();
/**
* 生成一个queue队列
* 1、队列名称 QUEUE_NAME
* 2、队列里面的消息是否持久化(默认消息存储在内存中)
* 3、该队列是否只供一个Consumer消费 是否共享 设置为true可以多个消费者消费
* 4、是否自动删除 最后一个消费者断开连接后 该队列是否自动删除
* 5、其他参数
*/
channel.queueDeclare(QUEUE_NAME,false,false,false,null);
String message = \”Hello world!\”;
/**
* 发送一个消息
* 1、发送到哪个exchange交换机
* 2、路由的key
* 3、其他的参数信息
* 4、消息体
*/
channel.basicPublish(\”\”,QUEUE_NAME,null,message.getBytes());
System.out.println(\” [x] Sent \’\”+message+\”\’\”);

channel.close();
connection.close();
}
}

运行该方法，可以看到控制台的打印

name=hello的队列收到Message

消费者

package com.xun.rabbitmqdemo.example;

import com.rabbitmq.client.*;
import java.io.IOException;
import java.util.concurrent.TimeoutException;

public class Receiver {
private final static String QUEUE_NAME = \”hello\”;
public static void main(String[] args) throws IOException, TimeoutException {
ConnectionFactory factory = new ConnectionFactory();
factory.setUsername(\”guest\”);
factory.setPassword(\”guest\”);
factory.setHost(\”localhost\”);
factory.setPort(5672);
factory.setVirtualHost(\”/\”);
factory.setConnectionTimeout(600000);//milliseconds
factory.setRequestedHeartbeat(60);//seconds
factory.setHandshakeTimeout(6000);//milliseconds
factory.setRequestedChannelMax(5);
factory.setNetworkRecoveryInterval(500);

Connection connection = factory.newConnection();
Channel channel = connection.createChannel();

channel.queueDeclare(QUEUE_NAME,false,false,false,null);
System.out.println(\”Waiting for messages. \”);

Consumer consumer = new DefaultConsumer(channel) {
@Override
public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties,byte[] body) throws IOException {
String message = new String(body, \”UTF-8\”);
System.out.println(\” [x] Received \’\” + message + \”\’\”);
}
};
channel.basicConsume(QUEUE_NAME,true,consumer);
}
}

工作队列

RabbitMqUtils工具类

package com.xun.rabbitmqdemo.utils;

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;

public class RabbitMqUtils {
public static Channel getChannel() throws Exception{
ConnectionFactory factory = new ConnectionFactory();
factory.setHost(\”localhost\”);
factory.setUsername(\”guest\”);
factory.setPassword(\”guest\”);
Connection connection = factory.newConnection();
Channel channel = connection.createChannel();
return channel;
}
}

启动2个工作线程

package com.xun.rabbitmqdemo.workQueue;

import com.rabbitmq.client.CancelCallback;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.DeliverCallback;
import com.xun.rabbitmqdemo.utils.RabbitMqUtils;

public class Work01 {
private static final String QUEUE_NAME = \”hello\”;
public static void main(String[] args) throws Exception{
Channel channel = RabbitMqUtils.getChannel();
DeliverCallback deliverCallback = (consumerTag,delivery)->{
String receivedMessage = new String(delivery.getBody());
System.out.println(\”接收消息:\”+receivedMessage);
};
CancelCallback cancelCallback = (consumerTag)->{
System.out.println(consumerTag+\”消费者取消消费接口回调逻辑\”);
};
System.out.println(\”C1 消费者启动等待消费….\”);
/**
* 消费者消费消息
* 1、消费哪个队列
* 2、消费成功后是否自动应答
* 3、消费的接口回调
* 4、消费未成功的接口回调
*/
channel.basicConsume(QUEUE_NAME,true,deliverCallback,cancelCallback);
}
}

package com.xun.rabbitmqdemo.workQueue;

import com.rabbitmq.client.CancelCallback;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.DeliverCallback;
import com.xun.rabbitmqdemo.utils.RabbitMqUtils;

public class Work02 {
private static final String QUEUE_NAME = \”hello\”;
public static void main(String[] args) throws Exception{
Channel channel = RabbitMqUtils.getChannel();
DeliverCallback deliverCallback = (consumerTag,delivery)->{
String receivedMessage = new String(delivery.getBody());
System.out.println(\”接收消息:\”+receivedMessage);
};
CancelCallback cancelCallback = (consumerTag)->{
System.out.println(consumerTag+\”消费者取消消费接口回调逻辑\”);
};
System.out.println(\”C2 消费者启动等待消费….\”);
channel.basicConsume(QUEUE_NAME,true,deliverCallback,cancelCallback);
}
}

启动工作线程

启动发送线程

package com.xun.rabbitmqdemo.workQueue;

import com.rabbitmq.client.Channel;
import com.xun.rabbitmqdemo.utils.RabbitMqUtils;
import java.util.Scanner;

public class Task01 {
private static final String QUEUE_NAME = \”hello\”;
public static void main(String[] args) throws Exception{
try(Channel channel= RabbitMqUtils.getChannel();){
channel.queueDeclare(QUEUE_NAME,false,false,false,null);
//从控制台接收消息
Scanner scanner = new Scanner(System.in);
while(scanner.hasNext()){
String message = scanner.next();
channel.basicPublish(\”\”,QUEUE_NAME,null,message.getBytes());
System.out.println(\”发送消息完成:\”+message);
}
}
}
}

启动发送线程，此时发送线程等待键盘输入

发送4个消息

可以看到2个工作线程按照顺序分别接收message。

消息应答机制

rabbitmq将message发送给消费者后，就会将该消息标记为删除。

但消费者在处理message过程中宕机，会导致消息的丢失。

因此需要设置手动应答。

生产者

import com.xun.rabbitmqdemo.utils.RabbitMqUtils;
import java.util.Scanner;

public class Task02 {
private static final String TASK_QUEUE_NAME = \”ack_queue\”;
public static void main(String[] args) throws Exception{
try(Channel channel = RabbitMqUtils.getChannel()){
channel.queueDeclare(TASK_QUEUE_NAME,false,false,false,null);
Scanner scanner = new Scanner(System.in);
System.out.println(\”请输入信息\”);
while(scanner.hasNext()){
String message = scanner.nextLine();
channel.basicPublish(\”\”,TASK_QUEUE_NAME,null,message.getBytes());
System.out.println(\”生产者task02发出消息\”+ message);
}
}
}
}

消费者

package com.xun.rabbitmqdemo.workQueue;
import com.rabbitmq.client.CancelCallback;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.DeliverCallback;
import com.xun.rabbitmqdemo.utils.RabbitMqUtils;
import com.xun.rabbitmqdemo.utils.SleepUtils;

public class Work03 {
private static final String ACK_QUEUE_NAME = \”ack_queue\”;
public static void main(String[] args) throws Exception{
Channel channel = RabbitMqUtils.getChannel();
System.out.println(\”Work03 等待接收消息处理时间较短\”);
DeliverCallback deliverCallback = (consumerTag,delivery)->{
String message = new String(delivery.getBody());
SleepUtils.sleep(1);
System.out.println(\”接收到消息:\”+message);
/**
* 1、消息的标记tag
* 2、是否批量应答
*/
channel.basicAck(delivery.getEnvelope().getDeliveryTag(),false);
};
CancelCallback cancelCallback = (consumerTag)->{
System.out.println(consumerTag+\”消费者取消消费接口回调逻辑\”);
};
//采用手动应答
boolean autoAck = false;
channel.basicConsume(ACK_QUEUE_NAME,autoAck,deliverCallback,cancelCallback);
}
}

package com.xun.rabbitmqdemo.workQueue;
import com.rabbitmq.client.CancelCallback;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.DeliverCallback;
import com.xun.rabbitmqdemo.utils.RabbitMqUtils;
import com.xun.rabbitmqdemo.utils.SleepUtils;

public class Work04 {
private static final String ACK_QUEUE_NAME = \”ack_queue\”;
public static void main(String[] args) throws Exception{
Channel channel = RabbitMqUtils.getChannel();
System.out.println(\”Work04 等待接收消息处理时间较长\”);
DeliverCallback deliverCallback = (consumerTag,delivery)->{
String message = new String(delivery.getBody());
SleepUtils.sleep(30);
System.out.println(\”接收到消息:\”+message);
channel.basicAck(delivery.getEnvelope().getDeliveryTag(),false);
};
CancelCallback cancelCallback = (consumerTag)->{
System.out.println(consumerTag+\”消费者取消消费接口回调逻辑\”);
};
//采用手动应答
boolean autoAck = false;
channel.basicConsume(ACK_QUEUE_NAME,autoAck,deliverCallback,cancelCallback);
}
}

工具类SleepUtils

package com.xun.rabbitmqdemo.utils;
public class SleepUtils {
public static void sleep(int second){
try{
Thread.sleep(1000*second);
}catch (InterruptedException _ignored){
Thread.currentThread().interrupt();
}
}
}

模拟

work04等待30s后发出ack

在work04处理message时手动停止线程，可以看到message:dd被rabbitmq交给了work03

不公平分发

上面的轮询分发，生产者依次向消费者按顺序发送消息，但当消费者A处理速度很快，而消费者B处理速度很慢时，这种分发策略显然是不合理的。不公平分发：

int prefetchCount = 1;
channel.basicQos(prefetchCount);

通过此配置，当消费者未处理完当前消息，rabbitmq会优先将该message分发给空闲消费者。

总结

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