RabbitMQ-消息队列的收发模式（二）
作者：互联网
为了测试方便代码复用这里封装了一个简单的连接mq的工具类
import com.rabbitmq.client.Connection; import com.rabbitmq.client.ConnectionFactory; import java.io.IOException; import java.util.concurrent.TimeoutException; /** * @ClassName RabbitMqUtil * @Author ZC * @Date 2022/7/2 21:21 * @Version 1.0 * @Description */ public class RabbitMqUtil { private final String host = "192.168.232.119"; private final int port = 5672; private final String username = "test"; private final String password = "test12"; private final String virtualHost = "test_mq"; /** * 连接RabbitMq * @return * @throws IOException * @throws TimeoutException */ public Connection getConnection() throws IOException, TimeoutException { //连接Mq服务器、主机、端口、用户名、密码 ConnectionFactory factory = new ConnectionFactory(); factory.setHost(host); factory.setPort(port); factory.setUsername(username); factory.setPassword(password); //设置虚拟主机 factory.setVirtualHost(virtualHost); Connection connection = factory.newConnection(); return connection; } }
1、简单队列模式
默认
direct类型交换机，队列名充当路由键。
默认模式-------------消费者间交替接收消息
弊端：
无法做到性能好的消费者多消费、性能差点的少消费（资源的浪费）
提供者
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import org.example.utils.RabbitMqUtil;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
/**
* @ClassName SimpleProvider
* @Author ZC
* @Date 2022/7/2 21:33
* @Version 1.0
* @Description 消息提供者
*/
public class SimpleProvider {
private final static String QUEUE_NAME = "simple_queue";
public static void main(String[] args) throws IOException, TimeoutException {
RabbitMqUtil rabbitMqUtil = new RabbitMqUtil();
//1、连接mq服务
Connection connection = rabbitMqUtil.getConnection();
//2、通过连接对象获得一个连接通道
Channel channel = connection.createChannel();
//3、声明队列
/**
* queueDeclare(String queue, boolean durable, boolean exclusive, boolean autoDelete,
* Map<String, Object> arguments)
* queue: 队列名称
* durable: 是否持久化（即服务重启时是否还存在）
* exclusive: 是否独占（即当前队列是否只被这一个队列消费）
* autoDelete: 是否自动删除（即当该队列没有被连接使用后是否删除）
* arguments: 队列其他参数的设置
*/
channel.queueDeclare(QUEUE_NAME,false,false,false,null);
//4、发送信息到mq
String message = "hello rabbitMq";
/**
* basicPublish(String exchange, String routingKey, BasicProperties props, byte[] body)
* exchange：交换机
* routingKey： 如果交换机是默认交换机那么这个相当于队列名称
* props：消息相关参数信息
* body： 具体消息
*/
channel.basicPublish("",QUEUE_NAME,null,message.getBytes());
System.out.println("send: message<"+message+">发送成功");
}
}
消费者
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.DeliverCallback;
import org.example.utils.RabbitMqUtil;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
/**
* @ClassName SimpleConsumer
* @Author ZC
* @Date 2022/7/2 22:02
* @Version 1.0
* @Description
*/
public class SimpleConsumer {
private final static String QUEUE_NAME = "simple_queue";
public static void main(String[] args) throws IOException, TimeoutException {
//1、获取连接
Connection connection = new RabbitMqUtil().getConnection();
//2、获取一个连接通道
Channel channel = connection.createChannel();
channel.queueDeclare(QUEUE_NAME,false,false,false,null);
//3、获取队列中的消息
//3。1、处理消息-回调之后使用
DeliverCallback deliverCallback = (consumerTag, delivery) -> {
String message = new String(delivery.getBody(), "UTF-8");
System.out.println(" [x] Received '" + message + "'");
};
//监听队列
/**
* basicConsume(String queue, boolean autoAck, DeliverCallback deliverCallback, CancelCallback cancelCallback)
*
* queue: 队列名称
* autoAck:
* deliverCallback: 消息传递时回调
* cancelCallback： 消费者取消时回调
*/
channel.basicConsume(QUEUE_NAME, true, deliverCallback, consumerTag -> { });
//非lambada表达式接收消息
// Consumer consumer = new DefaultConsumer(channel){
// 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 + "'");
// }
// };
// //监听队列
// channel.basicConsume(QUEUE_NAME,true,consumer);
}
}
2、work-模式
同一队列不同消费者的消息分发机制。
解决简单队列模式中无法实现能者多劳的问题
简单队列和work 模式的不同：
简单队列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，比如遇到状况：断电，都认为是消息已经成功消费；
work模式消费者从队列中获取消息后，服务器会将该消息标记为不可用状态，等待消费者反馈，如果消费这一直没有反馈，则该消息一直处于不可用状态。
提供者
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import org.example.utils.RabbitMqUtil;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
/**
* @ClassName WorkProvider
* @Author ZC
* @Date 2022/7/3 10:11
* @Version 1.0
* @Description
*/
public class WorkProvider {
private final static String QUEUE_NAME = "work_queue";
public static void main(String[] args) throws IOException, TimeoutException, InterruptedException {
Connection connection = new RabbitMqUtil().getConnection();
Channel channel = connection.createChannel();
channel.queueDeclare(QUEUE_NAME,false,false,false,null);
//发送消息
for (int i=0;i<30;i++){
String message = "hellwork"+i;
channel.basicPublish("",QUEUE_NAME,null,message.getBytes());
Thread.sleep(1000);
System.out.println("send ["+(i+1)+"]:"+message);
}
}
}
消费者
消费者1，接收一次消息休息1s
import com.rabbitmq.client.*;
import org.example.utils.RabbitMqUtil;
import java.io.IOException;
import java.sql.SQLOutput;
import java.util.concurrent.TimeoutException;
/**
* @ClassName WorkConsumer_1
* @Author ZC
* @Date 2022/7/3 10:24
* @Version 1.0
* @Description
*/
public class WorkConsumer_1 {
private final static String QUEUE_NAME = "work_queue";
public static void main(String[] args) throws IOException, TimeoutException {
Connection connection = new RabbitMqUtil().getConnection();
Channel channel = connection.createChannel();
channel.queueDeclare(QUEUE_NAME,false,false,false,null);
//工作模式的话，设置一直只接收一条，接收后手动回复
channel.basicQos(1);
//接收消息
Consumer consumer = new DefaultConsumer(channel){
@Override
public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
String message = new String(body,"utf-8");
System.out.println("消费者(1)接收到的消息:"+message);
//接收消息完成后需要手动回复
channel.basicAck(envelope.getDeliveryTag(),false);
}
};
//监听消息队列-手动回复时候关闭自动回复
channel.basicConsume(QUEUE_NAME,false,consumer);
}
}
消费者2，接收消息后休息2s
import com.rabbitmq.client.*;
import org.example.utils.RabbitMqUtil;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
/**
* @ClassName WorkConsumer_2
* @Author ZC
* @Date 2022/7/3 10:38
* @Version 1.0
* @Description
*/
public class WorkConsumer_2 {
private final static String QUEUE_NAME = "work_queue";
public static void main(String[] args) throws IOException, TimeoutException {
Connection connection = new RabbitMqUtil().getConnection();
Channel channel = connection.createChannel();
channel.queueDeclare(QUEUE_NAME,false,false,false,null);
channel.basicQos(1);//跟简单模式的区别
//接收消息
Consumer consumer = new DefaultConsumer(channel){
@Override
public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
String message = new String(body,"utf-8");
System.out.println("消费者(2)接收到的消息:"+message);
//手动回复
channel.basicAck(envelope.getDeliveryTag(),false);//跟简单模式的区别
}
};
//监听队列
channel.basicConsume(QUEUE_NAME,false,consumer); //跟简单模式的区别
}
}
消费者1比消费者2性能高，所以消费者处理消息快
3、发布订阅模式[*]
同一个交换机绑定多个队列，实现广播消息。
交换机类型为：fanout
一个消息同时发送给多个消费者消费，
消息发送到交换机（变换机中绑定了多个队列）服务消费者绑定了队列，
提供者
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import org.example.utils.RabbitMqUtil;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
/**
* @ClassName Provider
* @Author ZC
* @Date 2022/7/3 16:17
* @Version 1.0
* @Description 发布订阅模式下的
*/
public class Provider {
private final static String EXCHANGE_NAME="test_exchange";
public static void main(String[] args) throws IOException, TimeoutException {
Connection connection = new RabbitMqUtil().getConnection();
Channel channel = connection.createChannel();
//发布订阅模式，消费者的消息发送到交换机上,routingkey为空
//声明交换机,RabbitMQ常用的交换器类型有： fanout 、 direct 、 topic 、 headers 四种。
/**
* 路由模式使用: direct
* 通配符模式使用： topic
*/
channel.exchangeDeclare(EXCHANGE_NAME,"fanout");
//发送消息
for(int i=0;i<5;i++){
String message = "测试订阅/发布模式"+i;
System.out.println("send [x]"+message);
channel.basicPublish(EXCHANGE_NAME,"",null,message.getBytes());
}
}
}
消费者
消费者1
import com.rabbitmq.client.*;
import com.sun.javaws.jnl.RContentDesc;
import org.example.utils.RabbitMqUtil;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
/**
* @ClassName Consumer1
* @Author ZC
* @Date 2022/7/3 16:35
* @Version 1.0
* @Description
*/
public class Consumer1 {
private final static String QUEUE_NAME = "ex_queue_1";
private final static String EXCHANGE_NAME="test_exchange";
public static void main(String[] args) throws IOException, TimeoutException {
Connection connection = new RabbitMqUtil().getConnection();
//创建连接通道
Channel channel = connection.createChannel();
//声明队列
channel.queueDeclare(QUEUE_NAME,false,false,false,null);
//队列绑定交换机
channel.queueBind(QUEUE_NAME,EXCHANGE_NAME,"");
//接收消息
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("消费者1接收到消息："+message);
}
};
channel.basicConsume(QUEUE_NAME,consumer);
}
}
消费者2
import com.rabbitmq.client.*;
import org.example.utils.RabbitMqUtil;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
/**
* @ClassName Consumer2
* @Author ZC
* @Date 2022/7/3 16:45
* @Version 1.0
* @Description
*/
public class Consumer2 {
private final static String QUEUE_NAME="ex_queue_2";
private final static String EXCHANGE_NAME = "test_exchange";
public static void main(String[] args) throws IOException, TimeoutException {
Connection connection = new RabbitMqUtil().getConnection();
Channel channel = connection.createChannel();
channel.queueDeclare(QUEUE_NAME,false,false,false,null);
channel.queueBind(QUEUE_NAME,EXCHANGE_NAME,"");
//接收消息
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("消费者2接收到消息:"+message);
}
};
channel.basicConsume(QUEUE_NAME,consumer);
}
}
4、路由模式
交换机根据分发规则将消息分发到不同的队列。
交换机类型为：direct
发布订阅模式下：提供者发送消息时的routingkey为
“ ”，消费者队列绑定交换机时也没有指定routingkey，那么绑定在交换机上的所有队列都将消费消息ps: 路由模式下，指定routingkey ，消费者消费绑定的队列与发布时绑定的routingkey对应时才能消费消息
提供者
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import jdk.nashorn.internal.ir.CallNode;
import org.example.utils.RabbitMqUtil;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
/**
* @ClassName RoutingProvider
* @Author ZC
* @Date 2022/7/3 17:31
* @Version 1.0
* @Description
*/
public class RoutingProvider {
private final static String EXCHANGE_NAME = "test_routing";
private final static String ROUTING_KEY = "rk";
public static void main(String[] args) throws IOException, TimeoutException {
Connection connection = new RabbitMqUtil().getConnection();
Channel channel = connection.createChannel();
//声明交换机
channel.exchangeDeclare(EXCHANGE_NAME,"direct");
//发送消息
for(int i = 0;i<5;i++){
String message = "测试routing模式"+i;
channel.basicPublish(EXCHANGE_NAME,ROUTING_KEY,null,message.getBytes());
System.out.println("send [x]:"+message);
}
}
}
消费者
消费者1 routingkey = rk，根据routingkey指定绑定交换机中的队列
import com.rabbitmq.client.*;
import org.example.utils.RabbitMqUtil;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
/**
* @ClassName Routingconsumer1
* @Author ZC
* @Date 2022/7/3 17:32
* @Version 1.0
* @Description
*/
public class Routingconsumer1 {
private final static String QUEUE_NAME = "rk";
private final static String EXCHANGE_NAME = "test_routing";
private final static String ROUTING_KEY = "rk";
public static void main(String[] args) throws IOException, TimeoutException {
Connection connection = new RabbitMqUtil().getConnection();
Channel channel = connection.createChannel();
channel.exchangeDeclare(EXCHANGE_NAME,"direct");
channel.queueDeclare(QUEUE_NAME,false,false,false,null);
channel.queueBind(QUEUE_NAME,EXCHANGE_NAME,ROUTING_KEY);
//接收消息
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("消费者1接收到消息:"+message);
}
};
channel.basicConsume(QUEUE_NAME,consumer);
}
}
消费者2 routingkey=rk2，
import com.rabbitmq.client.*;
import org.example.utils.RabbitMqUtil;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
/**
* @ClassName Routingconsumer2
* @Author ZC
* @Date 2022/7/3 17:32
* @Version 1.0
* @Description
*/
public class Routingconsumer2 {
private final static String QUEUE_NAME = "rk1";
private final static String EXCHANGE_NAME = "test_routing";
private final static String ROUTING_KEY = "rk1";
public static void main(String[] args) throws IOException, TimeoutException {
Connection connection = new RabbitMqUtil().getConnection();
Channel channel = connection.createChannel();
//声明交换机
channel.exchangeDeclare(EXCHANGE_NAME,"direct");
//声明队列
channel.queueDeclare(QUEUE_NAME,false,false,false,null);
//队列绑定交换机
channel.queueBind(QUEUE_NAME,EXCHANGE_NAME,ROUTING_KEY);
//接收消息
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("消费者2接收到的消息:"+message);
}
};
channel.basicConsume(QUEUE_NAME,consumer);
}
}
5、通配符模式[主题模式]
交换机可以根据模糊的分发规则将消息分发到不同的队列。
交换机类型为: topic
消费者routingKey中使用*或#，实现交换机跟队列中的模糊匹配
实例：test.add、test.del、test.other.other。
*单层匹配
- test.*，只能匹配到test.add、test.del
多成匹配
- test.# 能匹配所有以test开头的
提供者
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import org.example.utils.RabbitMqUtil;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
/**
* @ClassName provider
* @Author ZC
* @Date 2022/7/3 21:02
* @Version 1.0
* @Description
*/
public class Provider {
private final static String EXCHANGE_NAME="ex_topic";
public static void main(String[] args) throws IOException, TimeoutException {
Connection connection = new RabbitMqUtil().getConnection();
Channel channel = connection.createChannel();
channel.exchangeDeclare(EXCHANGE_NAME,"topic");
String message = "测试通配符模式";
channel.basicPublish(EXCHANGE_NAME,"test.topic",null,message.getBytes());
channel.basicPublish(EXCHANGE_NAME,"test.routing",null,message.getBytes());
channel.basicPublish(EXCHANGE_NAME,"test.other.other",null,message.getBytes());
System.out.println("send[x]:"+message);
}
}
消费者
消费者1，*匹配
import com.rabbitmq.client.*;
import org.example.utils.RabbitMqUtil;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
/**
* @ClassName Consumer1
* @Author ZC
* @Date 2022/7/3 21:13
* @Version 1.0
* @Description
*/
public class Consumer1{
private final static String EXCHANGE_NAME="ex_topic";
private final static String QUEUE_NAME="queue_topic_1";
public static void main(String[] args) throws IOException, TimeoutException {
Connection connection = new RabbitMqUtil().getConnection();
Channel channel = connection.createChannel();
channel.exchangeDeclare(EXCHANGE_NAME,"topic");
channel.queueDeclare(QUEUE_NAME,false,false,false,null);
channel.queueBind(QUEUE_NAME,EXCHANGE_NAME,"test.*"); //*匹配
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("消费者1:"+message);
}
};
channel.basicConsume(QUEUE_NAME,consumer);
}
}
消费者2，#匹配
import com.rabbitmq.client.*;
import org.example.utils.RabbitMqUtil;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
/**
* @ClassName Consumer2
* @Author ZC
* @Date 2022/7/3 21:13
* @Version 1.0
* @Description
*/
public class Consumer2 {
private final static String EXCHANGE_NAME="ex_topic";
private final static String QUEUE_NAME="queue_topic_2";
public static void main(String[] args) throws IOException, TimeoutException {
Connection connection = new RabbitMqUtil().getConnection();
Channel channel = connection.createChannel();
channel.exchangeDeclare(EXCHANGE_NAME,"topic");
channel.queueDeclare(QUEUE_NAME,false,false,false,null);
channel.queueBind(QUEUE_NAME,EXCHANGE_NAME,"test.#"); //#匹配
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("消费者2:"+message);
}
};
channel.basicConsume(QUEUE_NAME,consumer);
}
}
6、远程调用模式
客户端发送请求到请求队列，并设置临时的响应队列，服务端订阅请求队列，并发送响应到临时的响应队列。
7、发布确认模式
消息可靠发送。
总结
交换机类型
- fanout 直连交换机：交换机忽略路由键，直接将消息分发到队列中。
- direct 路由交换机：交换机通过路由键，将消息分发到不同的队列中。（默认交互机使用队列名作为路由键）
- topic 主题交换机：交换机可以和队列绑定模糊的分发规则，以匹配不同的路由键。
- headers 头部交换机：不依赖于路由键，而是绑定时指定一组键值对，并提取消息的键值对是否完全匹配绑定的键值对，如果完全匹配则会把消息路由到该队列中。
标签：String,队列,RabbitMQ,收发,IOException,import,public,channel,NAME 来源： https://www.cnblogs.com/zceng/p/16441364.html