RabbitMQ学习笔记之五种模式及消息确认机制
本文详细介绍简单模式Simple、工作模式Work、发布订阅模式Publish/Subscribe、Topic、Routing。
Maven依赖引用
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
</dependency>
<dependency>
<groupId>com.rabbitmq</groupId>
<artifactId>amqp-client</artifactId>
<version>4.0.2</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.10</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.5</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
</dependencies>
连接RabbitMQ服务公用方法
package com.test.testboot.mq;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
public class ConnectionUtil {
/**
* 获取MQ的连接
* @return
* @throws IOException
* @throws TimeoutException
*/
public static Connection getConection() throws IOException, TimeoutException {
//创建连接工厂
ConnectionFactory factory=new ConnectionFactory();
//设置服务地址
factory.setHost("127.0.0.1");
//设置服务端口号
factory.setPort(5672);
//设置Host
factory.setVirtualHost("/");
//设置用户名
factory.setUsername("");
//设置密码
factory.setPassword("123456");
return factory.newConnection() ;
}
}
模式1：简单队列模式(Simple)
消息生产者p将消息放入队列
消费者监听队列,如果队列中有消息,就消费掉,消息被拿走后,自动从队列删除
(隐患,消息可能没有被消费者正确处理,已经消失了,无法恢复)
应用场景:聊天室
生产者
package com.test.testboot.mq;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
public class Sender {
private static String QUEUE_NAME="test_simple_queue";
public static void main(String[] args) throws IOException, TimeoutException {
//获取一个连接
Connection connection=ConnectionUtil.getConection();
//获取一个通道
Channel channel=connection.createChannel();
//创建队列声明
channel.queueDeclare(QUEUE_NAME,false,false,false,null);
String msg="Hello World!";
System.out.println("sendMsg："+msg);
channel.basicPublish("",QUEUE_NAME,null,msg.getBytes());
channel.close();
connection.close();
}
}
消费者
package com.test.testboot.mq;
import com.rabbitmq.client.*;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
public class Recv {
private static String QUEUE_NAME="test_simple_queue";
public static void main(String[] args) throws IOException, TimeoutException, InterruptedException {
//获取连接
Connection connection=ConnectionUtil.getConection();
//创建通道
Channel channel = connection.createChannel();
//定义队列消费者
channel.queueDeclare(QUEUE_NAME,false,false,false,null);
DefaultConsumer defaultConsumer = new DefaultConsumer(channel) {
//获取到达的消息
@Override
public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
String recvMsg = new String(body, "UTF-8");
System.out.println("recvMsg:" + recvMsg);
}
};
channel.basicConsume(QUEUE_NAME,true,defaultConsumer);;
//老版本api
/* QueueingConsumer comsumer= new QueueingConsumer(channel);
channel.queueDeclare(QUEUE_NAME,false,false,false,null);
//监听队列
channel.basicConsume(QUEUE_NAME,true,comsumer);
while(true){
QueueingConsumer.Delivery delivery=comsumer.nextDelivery();
String recvMsg=new String(delivery.getBody());
System.out.println("recvMsg:"+recvMsg);
}*/
}
}
模式2:工作模式(Work)
生产者将消息放入队列
多个消费者同时监听同一个队列,消息如何被消费?(与具体的分发方式有关系)
C1,C2共同争抢当前消息队列的内容,谁先拿到消息,谁来负责消费
应用场景:红包;大型项目中的资源调度过程(直接由最空闲的系统争抢到资源处理任务)
轮询分发（Round-Robin）
生产者
package com.test.testboot.mq.work;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.test.testboot.mq.ConnectionUtil;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
public class Send {
/*
* |--C1
* p-----Queue---|
* |--C2
*/
private static final String QUEUE_NAME="test_work_queue";
public static void main(String[] args) throws IOException, TimeoutException, InterruptedException {
//获取连接
Connection conection = ConnectionUtil.getConection();
//获取Channel
Channel channel = conection.createChannel();
//声明队列
channel.queueDeclare(QUEUE_NAME,false,false,false,null);
for (int i = 0; i <10 ; i++) {
String msg="Hello"+i;
System.out.println("[WorkQueue] Send ："+msg);
channel.basicPublish("",QUEUE_NAME,null,msg.getBytes());
Thread.sleep(i*10);
}
channel.close();
conection.close();
}
}
消费者1
package com.test.testboot.mq.work;
import com.rabbitmq.client.*;
import com.test.testboot.mq.ConnectionUtil;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
public class Recv1 {
private static final String QUEUE_NAME="test_work_queue";
public static void main(String[] args) throws IOException, TimeoutException {
//获取连接
Connection conection = ConnectionUtil.getConection();
//获取Channel
Channel channel = conection.createChannel();
//声明队列
channel.queueDeclare(QUEUE_NAME,false,false,false,null);
//定义一个消费者
DefaultConsumer consumer = new DefaultConsumer(channel) {
//消息到达触发这个方法
@Override
public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
String msg=new String(body,"UTF-8");
System.out.println("Recv[1] recv msg:"+msg);
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}finally {
System.out.println("Recv[1] down");
}
}
};
/*
true:表示自动确认,只要消息从队列中获取,无论消费者获取到消息后是否成功消费,都会认为消息成功消费.
false:表示手动确认,消费者获取消息后,服务器会将该消息标记为不可用状态,等待消费者的反馈,
如果消费者一直没有反馈,那么该消息将一直处于不可用状态,并且服务器会认为该消费者已经挂掉,不会再给其发送消息,
直到该消费者反馈.
*/
boolean autoAck=true;
channel.basicConsume(QUEUE_NAME,autoAck,consumer);
}
}
消费者2
package com.test.testboot.mq.work;
import com.rabbitmq.client.*;
import com.test.testboot.mq.ConnectionUtil;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
public class Recv2 {
private static final String QUEUE_NAME="test_work_queue";
public static void main(String[] args) throws IOException, TimeoutException {
//获取连接
Connection conection = ConnectionUtil.getConection();
//获取Channel
Channel channel = conection.createChannel();
//声明队列
channel.queueDeclare(QUEUE_NAME,false,false,false,null);
//定义一个消费者
DefaultConsumer consumer = new DefaultConsumer(channel) {
//消息到达触发这个方法
@Override
public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
String msg=new String(body,"UTF-8");
System.out.println("Recv[2] recv msg:"+msg);
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
e.printStackTrace();
}finally {
System.out.println("Recv[2] down");
}
}
};
boolean autoAck=true;
channel.basicConsume(QUEUE_NAME,autoAck,consumer);
}
}
公平分发（Work Fair）
生产者
package com.test.testboot.mq.workfair;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.test.testboot.mq.ConnectionUtil;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
public class Send {
/*
* |--C1
* p-----Queue---|
* |--C2
*/
private static final String QUEUE_NAME="test_work_queue";
public static void main(String[] args) throws IOException, TimeoutException, InterruptedException {
//获取连接
Connection conection = ConnectionUtil.getConection();
//获取Channel
Channel channel = conection.createChannel();
//每个消费者 发送确认消息之前，消息队列不发送下一个消息到消费者，一次只处理一个消息
//限制发送给同一个消费者不得超过一条消息
channel.basicQos(1);
//声明队列
channel.queueDeclare(QUEUE_NAME,false,false,false,null);
for (int i = 0; i <10 ; i++) {
String msg="Hello"+i;
System.out.println("[WorkQueue] Send ："+msg);
channel.basicPublish("",QUEUE_NAME,null,msg.getBytes());
Thread.sleep(i*5);
}
channel.close();
conection.close();
}
}
消费者1
package com.test.testboot.mq.workfair;
import com.rabbitmq.client.*;
import com.test.testboot.mq.ConnectionUtil;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
public class Recv1 {
private static final String QUEUE_NAME="test_work_queue";
public static void main(String[] args) throws IOException, TimeoutException {
//获取连接
Connection conection = ConnectionUtil.getConection();
//获取Channel
Channel channel = conection.createChannel();
//声明队列
channel.queueDeclare(QUEUE_NAME,false,false,false,null);
//每次只分发一个
channel.basicQos(1);
//定义一个消费者
DefaultConsumer consumer = new DefaultConsumer(channel) {
//消息到达触发这个方法
@Override
public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
String msg=new String(body,"UTF-8");
System.out.println("Recv[1] recv msg:"+msg);
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}finally {
System.out.println("Recv[1] down");
//手动回执
channel.basicAck(envelope.getDeliveryTag(),false);
}
}
};
boolean autoAck=false; //自动应答
channel.basicConsume(QUEUE_NAME,autoAck,consumer);
}
}
消费者2
package com.test.testboot.mq.workfair;
import com.rabbitmq.client.*;
import com.test.testboot.mq.ConnectionUtil;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
public class Recv2 {
private static final String QUEUE_NAME="test_work_queue";
public static void main(String[] args) throws IOException, TimeoutException {
//获取连接
Connection conection = ConnectionUtil.getConection();
//获取Channel
final Channel channel = conection.createChannel();
channel.basicQos(1);
//声明队列
channel.queueDeclare(QUEUE_NAME,false,false,false,null);
//定义一个消费者
DefaultConsumer consumer = new DefaultConsumer(channel) {
//消息到达触发这个方法
@Override
public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
String msg=new String(body,"UTF-8");
System.out.println("Recv[2] recv msg:"+msg);
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
e.printStackTrace();
}finally {
System.out.println("Recv[2] down");
channel.basicAck(envelope.getDeliveryTag(),false);
}
}
};
boolean autoAck=false;//自动应答
channel.basicConsume(QUEUE_NAME,autoAck,consumer);
}
}
模式三：订阅模式(publish/subscribe)
生产者将消息交给交换机
有交换机根据发布订阅的模式设定将消息同步到所有的绑定队列中;
后端的消费者都能拿到消息
应用场景:短信、邮件群发,群聊天,广告
生产者
package com.test.testboot.mq.ps;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.test.testboot.mq.ConnectionUtil;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
public class Send {
/*
* |--C1
* p---exchange----Queue-----|
* |--C2
*/
private static final String EXCHANGE_NAME="test_exchange_fanout";
public static void main(String[] args) throws IOException, TimeoutException, InterruptedException {
//获取连接
Connection conection = ConnectionUtil.getConection();
//获取Channel
Channel channel = conection.createChannel();
//声明交换机
channel.exchangeDeclare(EXCHANGE_NAME,"fanout");
String msg="Hello";
System.out.println("Send ："+msg);
channel.basicPublish(EXCHANGE_NAME,"",null,msg.getBytes());
channel.close();
conection.close();
}
}
消费者1
package com.test.testboot.mq.ps;
import com.rabbitmq.client.*;
import com.test.testboot.mq.ConnectionUtil;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
public class Recv1 {
private static final String QUEUE_NAME="test_queue_fanout_email";
private static final String EXCHANGE_NAME="test_exchange_fanout";
public static void main(String[] args) throws IOException, TimeoutException {
//获取连接
Connection conection = ConnectionUtil.getConection();
//获取Channel
Channel channel = conection.createChannel();
//声明队列
channel.queueDeclare(QUEUE_NAME,false,false,false,null);
//绑定交换机
channel.queueBind(QUEUE_NAME,EXCHANGE_NAME,"");
//保证一次只分发一个
channel.basicQos(1);
//定义一个消费者
DefaultConsumer consumer = new DefaultConsumer(channel) {
//消息到达触发这个方法
@Override
public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
String msg=new String(body,"UTF-8");
System.out.println("[1] recv msg:"+msg);
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}finally {
System.out.println("[1] down");
channel.basicAck(envelope.getDeliveryTag(),false);
}
}
};
boolean autoAck=false;
channel.basicConsume(QUEUE_NAME,autoAck,consumer);
}
}
消费者2
package com.test.testboot.mq.ps;
import com.rabbitmq.client.*;
import com.test.testboot.mq.ConnectionUtil;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
public class Recv2 {
private static final String QUEUE_NAME="test_queue_fanout_sms";
private static final String EXCHANGE_NAME="test_exchange_fanout";
public static void main(String[] args) throws IOException, TimeoutException {
//获取连接
Connection conection = ConnectionUtil.getConection();
//获取Channel
Channel channel = conection.createChannel();
//声明队列
channel.queueDeclare(QUEUE_NAME,false,false,false,null);
//绑定交换机
channel.queueBind(QUEUE_NAME,EXCHANGE_NAME,"");
//保证每次只分发一个
channel.basicQos(1);
//定义一个消费者
DefaultConsumer consumer = new DefaultConsumer(channel) {
//消息到达触发这个方法
@Override
public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
String msg=new String(body,"UTF-8");
System.out.println("[2]recv msg:"+msg);
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
e.printStackTrace();
}finally {
System.out.println("[2] down");
channel.basicAck(envelope.getDeliveryTag(),false);
}
}
};
boolean autoAck=true;
channel.basicConsume(QUEUE_NAME,autoAck,consumer);
}
}
模式四：路由模式（Routing）
生产者发送消息到交换机,同时绑定一个路由Key,交换机根据路由key对下游绑定的队列进行路
由key的判断,满足路由key的队列才会接收到消息,消费者消费消息
应用场景: 项目中的error报错
生产者
package com.test.testboot.mq.routing;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.test.testboot.mq.ConnectionUtil;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
/**
* @description: 路由模式生产者
* @author: Mr.ADiao
* @create: 2019-10-21 11:04
**/
public class Send {
private static final String EXCHANGE_NAME="test_exchange_direct";
public static void main(String[] args) throws IOException, TimeoutException {
//获取连接
Connection conection = ConnectionUtil.getConection();
//创建频道
Channel channel = conection.createChannel();
channel.basicQos(1);
//声明交换机
channel.exchangeDeclare(EXCHANGE_NAME, "direct");
String msg="Hello Routing";
String routingKey="warning";
channel.basicPublish(EXCHANGE_NAME,routingKey,null,msg.getBytes());
System.out.println("send:"+msg);
channel.close();
conection.close();
}
}
消费者1
package com.test.testboot.mq.routing;
import com.rabbitmq.client.*;
import com.test.testboot.mq.ConnectionUtil;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
public class Recv1 {
private static final String EXCHANGE_NAME="test_exchange_direct";
private static final String QUEUE_NAME="test_queue_direct1";
public static void main(String[] args) throws IOException, TimeoutException {
Connection connection = ConnectionUtil.getConection();
Channel channel = connection.createChannel();
channel.queueDeclare(QUEUE_NAME, false, false, false, null);
channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, "error");
channel.basicQos(1);
//定义一个消费者
DefaultConsumer consumer = new DefaultConsumer(channel) {
//消息到达触发这个方法
@Override
public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
String msg=new String(body,"UTF-8");
System.out.println("[1] recv msg:"+msg);
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}finally {
System.out.println("[1] down");
channel.basicAck(envelope.getDeliveryTag(),false);
}
}
};
boolean autoAck=false;
channel.basicConsume(QUEUE_NAME,autoAck,consumer);
}
}
消费者2
package com.test.testboot.mq.routing;
import com.rabbitmq.client.*;
import com.test.testboot.mq.ConnectionUtil;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
/**
* @description: 路由模式消费者2
* @author: Mr.ADiao
* @create: 2019-10-21 11:05
**/
public class Recv2 {
private static final String EXCHANGE_NAME="test_exchange_direct";
private static final String QUEUE_NAME="test_queue_direct2";
public static void main(String[] args) throws IOException, TimeoutException {
Connection connection = ConnectionUtil.getConection();
Channel channel = connection.createChannel();
channel.queueDeclare(QUEUE_NAME, false, false, false, null);
channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, "error");
channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, "info");
channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, "warning");
channel.basicQos(1);
//定义一个消费者
DefaultConsumer consumer = new DefaultConsumer(channel) {
//消息到达触发这个方法
@Override
public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
String msg=new String(body,"UTF-8");
System.out.println("[2] recv msg:"+msg);
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}finally {
System.out.println("[2] down");
channel.basicAck(envelope.getDeliveryTag(),false);
}
}
};
boolean autoAck=false;
channel.basicConsume(QUEUE_NAME,autoAck,consumer);
}
}
模式五：主题模式（Topics）
topic模式也称为通配符模式，其实他相对于routing模式最大的好处就是他多了一种匹配模式的路由，怎么理解匹配呢，其实就相当于我们之前正则的.*这种，不过他的匹配机制可能不是这种（其实除了匹配规则外，他的作用就和routing模式一样 ）
匹配规则：
绑定键binding key也必须是这种形式。以特定路由键发送的消息将会发送到所有绑定键与之匹配的队列中。但绑定键有两种特殊的情况：
①*（星号）仅代表一个单词
②#（井号）代表任意个单词
示例：
.apple. : 匹配以 任意一个单词字符开头中间包含 .orange. 以任意一个单词字符结尾 的字符串。比如 a.apple.b, asd.apple.qewf 等（注意是一个单词）。
log.# ：只要一lay.开头的都匹配，他可以匹配product.a,product.a.b, product.b.c等。
生产者
package com.adiao.rabbitmq.topics;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
import com.adiao.rabbitmq.util.ConnectionUtils;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
public class Send {
private static final String EXCHANGE_NAME="test_exchange_topic";
public static void main(String[] args) throws IOException, TimeoutException {
Connection connection = ConnectionUtils.getConnection();
Channel channel = connection.createChannel();
channel.exchangeDeclare(EXCHANGE_NAME, "topic");
channel.basicQos(1);
String msg="This is Topic Msg";
channel.basicPublish(EXCHANGE_NAME, "myTopic.key2", null, msg.getBytes());
System.out.println("Send:"+msg);
channel.close();
connection.close();
}
}
消费者1
package com.adiao.rabbitmq.topics;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
import com.adiao.rabbitmq.util.ConnectionUtils;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.DefaultConsumer;
import com.rabbitmq.client.Envelope;
import com.rabbitmq.client.AMQP.BasicProperties;
public class Recv1 {
private static final String EXCHANGE_NAME="test_exchange_topic";
private static final String QUEUE_NAME="test_queue_topic1";
public static void main(String[] args) throws IOException, TimeoutException {
Connection connection = ConnectionUtils.getConnection();
Channel channel = connection.createChannel();
channel.queueDeclare(QUEUE_NAME, false, false, false, null);
channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, "myTopic.#");
channel.basicQos(1);
DefaultConsumer consumer = new DefaultConsumer(channel){
@Override
public void handleDelivery(String consumerTag, Envelope envelope,
BasicProperties properties, byte[] body) throws IOException {
System.out.println("[1] Recv:"+new String(body,"UTF-8"));
//手动回执
channel.basicAck(envelope.getDeliveryTag(), false);
}
};
channel.basicConsume(QUEUE_NAME, false, consumer);
}
}
消费者2
package com.adiao.rabbitmq.topics;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
import com.adiao.rabbitmq.util.ConnectionUtils;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.DefaultConsumer;
import com.rabbitmq.client.Envelope;
import com.rabbitmq.client.AMQP.BasicProperties;
public class Recv2 {
private static final String EXCHANGE_NAME="test_exchange_topic";
private static final String QUEUE_NAME="test_queue_topic2";
public static void main(String[] args) throws IOException, TimeoutException {
Connection connection = ConnectionUtils.getConnection();
Channel channel = connection.createChannel();
channel.queueDeclare(QUEUE_NAME, false, false, false, null);
channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, "myTopic.key1");
channel.basicQos(1);
DefaultConsumer consumer = new DefaultConsumer(channel){
@Override
public void handleDelivery(String consumerTag, Envelope envelope,
BasicProperties properties, byte[] body) throws IOException {
System.out.println("[2]Recv:"+new String(body,"UTF-8"));
channel.basicAck(envelope.getDeliveryTag(), false);
}
};
channel.basicConsume(QUEUE_NAME, false, consumer);
}
}
消息确认机制之事务机制
AMQP协议自带机制
弊端：降低RabibtMQ的吞吐量
生产者
package com.adiao.rabbitmq.tx;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
import com.adiao.rabbitmq.util.ConnectionUtils;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
public class Send {
private static final String QUEUE_NAME="test_queue_tx";
public static void main(String[] args) throws IOException, TimeoutException {
Connection connection = ConnectionUtils.getConnection();
Channel channel = connection.createChannel();
channel.queueDeclare(QUEUE_NAME, false, false, false, null);
String msg="This is tx";
try {
//开启事务
channel.txSelect();
channel.basicPublish("", QUEUE_NAME, null, msg.getBytes());
int i=1/0;
System.out.println("Send"+msg);
//提交事务
channel.txCommit();
} catch (Exception e) {
e.printStackTrace();
//回滚事务
channel.txRollback();
System.out.println("rollback");
}
channel.close();
connection.close();
}
}
消费者
package com.adiao.rabbitmq.tx;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
import com.adiao.rabbitmq.util.ConnectionUtils;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.DefaultConsumer;
import com.rabbitmq.client.Envelope;
import com.rabbitmq.client.AMQP.BasicProperties;
public class Recv {
private static final String QUEUE_NAME = "test_queue_tx";
public static void main(String[] args) throws IOException, TimeoutException {
Connection connection = ConnectionUtils.getConnection();
Channel channel = connection.createChannel();
channel.queueDeclare(QUEUE_NAME, false, false, false, null);
channel.basicConsume(QUEUE_NAME, true, new DefaultConsumer(channel){
@Override
public void handleDelivery(String consumerTag, Envelope envelope,
BasicProperties properties, byte[] body) throws IOException {
System.out.println("Recv:"+new String(body,"UTF-8"));
}
});
}
}
消息确认机制之Confirm同步确认
生产者
package com.adiao.rabbitmq.confirm;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
import com.adiao.rabbitmq.util.ConnectionUtils;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
public class Send {
private static final String QUEUE_NAME="test_queue_confirm";
public static void main(String[] args) throws IOException, TimeoutException, InterruptedException {
Connection connection = ConnectionUtils.getConnection();
Channel channel = connection.createChannel();
channel.queueDeclare(QUEUE_NAME, false, false, false, null);
//单条开启
channel.confirmSelect();
String msg="This is Confirm";
channel.basicPublish("", QUEUE_NAME, null, msg.getBytes());
if(!channel.waitForConfirms()){
System.out.println("Send Faile");
}else{
System.out.println("Send Success");
}
channel.close();
connection.close();
}
}
消费者
package com.adiao.rabbitmq.confirm;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
import com.adiao.rabbitmq.util.ConnectionUtils;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.DefaultConsumer;
import com.rabbitmq.client.Envelope;
import com.rabbitmq.client.AMQP.BasicProperties;
public class Recv {
private static final String QUEUE_NAME = "test_queue_confirm";
public static void main(String[] args) throws IOException, TimeoutException {
Connection connection = ConnectionUtils.getConnection();
final Channel channel = connection.createChannel();
channel.queueDeclare(QUEUE_NAME, false, false, false, null);
channel.basicConsume(QUEUE_NAME, false, new DefaultConsumer(channel) {
@Override
public void handleDelivery(String consumerTag, Envelope envelope,
BasicProperties properties, byte[] body) throws IOException {
System.out.println("Recv:" + new String(body, "UTF-8"));
channel.basicAck(envelope.getDeliveryTag(), false);
}
});
}
}
批量确认消费者
package com.adiao.rabbitmq.confirm;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
import com.adiao.rabbitmq.util.ConnectionUtils;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
public class SendManyMsg {
private static final String QUEUE_NAME="test_queue_confirm";
public static void main(String[] args) throws IOException, TimeoutException, InterruptedException {
Connection connection = ConnectionUtils.getConnection();
Channel channel = connection.createChannel();
channel.queueDeclare(QUEUE_NAME, false, false, false, null);
//单条开启
channel.confirmSelect();
String msg="This is Confirm";
for (int i = 0; i < 10; i++) {
if(i==5){
int j=i/0;
}
channel.basicPublish("", QUEUE_NAME, null, msg.getBytes());
}
channel.waitForConfirmsOrDie();
System.out.println("全部发送完成");
channel.close();
connection.close();
}
}
异步确认消费者
package com.adiao.rabbitmq.confirm;
import java.io.IOException;
import java.util.Date;
import java.util.concurrent.TimeoutException;
import com.adiao.rabbitmq.util.ConnectionUtils;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.ConfirmListener;
import com.rabbitmq.client.Connection;
public class SendAsyn {
private static final String QUEUE_NAME="test_queue_confirm";
public static void main(String[] args) throws IOException, TimeoutException, InterruptedException {
Connection connection = ConnectionUtils.getConnection();
Channel channel = connection.createChannel();
channel.queueDeclare(QUEUE_NAME, false, false, false, null);
channel.confirmSelect();
channel.addConfirmListener(new ConfirmListener() {
public void handleNack(long deliveryTag, boolean multiple)
throws IOException {
System.out.println("未确认消息标识："+deliveryTag);
}
public void handleAck(long deliveryTag, boolean multiple)
throws IOException {
System.out.println(String.format("已确认消息标识:%d (%b)", deliveryTag,multiple));
}
});
for (int i = 0; i <10; i++) {
String msg=new Date().getTime()+ ":This is Asyn Confirm";
System.out.println("Send:"+msg);
channel.basicPublish("", QUEUE_NAME, null, msg.getBytes());
Thread.sleep(1000);
}
channel.close();
connection.close();
}
}
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