這個類非常強大,我們可以對他做很多設置,對於消費者的配置項,這個類都可以滿足
監聽隊列(多個隊列)、自動啓動、自動聲明功能
可以設置事務特性、事務管理器、事務屬性、事務容量(併發)、是否開啓事務、回滾消息等
可以設置消費者數量、最大最小數量、批量消費
設置消息確認和自動確認模式、是否重回隊列、異常捕獲handler函數
設置消費者標籤生成策略、是否獨佔模式、消費者屬性等
設置具體的轉換器、消息轉換器等
很多基於RabbitMQ的自制定化後端管控臺在進行動態配置的時候,也是根據這一特性去實現的。
注意:SimpleMessageListenerContainer可以進行動態設置,比如在運行中的應用可以動態
修改其消費者數量的大小、接收消息的模式等
package com.dwz.spring;
import java.util.UUID;
import org.springframework.amqp.core.AcknowledgeMode;
import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.core.Queue;
import org.springframework.amqp.core.TopicExchange;
import org.springframework.amqp.rabbit.connection.CachingConnectionFactory;
import org.springframework.amqp.rabbit.connection.ConnectionFactory;
import org.springframework.amqp.rabbit.core.RabbitAdmin;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer;
import org.springframework.amqp.rabbit.listener.api.ChannelAwareMessageListener;
import org.springframework.amqp.support.ConsumerTagStrategy;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import com.rabbitmq.client.Channel;
@Configuration
@ComponentScan("com.dwz.spring.*")
public class RabbitMQConfig {
@Bean
public ConnectionFactory connectionFactory() {
CachingConnectionFactory connectionFactory = new CachingConnectionFactory();
connectionFactory.setAddresses("127.0.0.1:5672");
connectionFactory.setVirtualHost("/vhost_dwz");
connectionFactory.setUsername("root_dwz");
connectionFactory.setPassword("123456");
return connectionFactory;
}
@Bean
public RabbitAdmin rabbitAdmin(ConnectionFactory connectionFactory) {
RabbitAdmin rabbitAdmin = new RabbitAdmin(connectionFactory);
System.err.println("RabbitAdmin啓動了。。。");
//設置啓動spring容器時自動加載這個類(這個參數現在默認已經是true,可以不用設置)
rabbitAdmin.setAutoStartup(true);
return rabbitAdmin;
}
@Bean
public RabbitTemplate rabbitTemplate(ConnectionFactory connectionFactory) {
RabbitTemplate rabbitTemplate = new RabbitTemplate(connectionFactory);
return rabbitTemplate;
}
/**
* 針對消費者的配置
* 1.設置交換機的類型
* 2.將隊列綁定到交換機
* FanoutExchange:將消息分發到所有綁定的隊列,無routingkey的概念
* TopicExchange:多關鍵字匹配
* HeadersExchange:通過添加屬性key-value匹配
* DirectExchange:按照routingkey分發到指定隊列
*/
@Bean
public TopicExchange exchange001() {
return new TopicExchange("topic001", true, false);
}
@Bean
public Queue queue001() {
return new Queue("queue001", true);//隊列持久化
}
@Bean
public Binding binding001() {
return BindingBuilder.bind(queue001()).to(exchange001()).with("spring.*");
}
@Bean
public TopicExchange exchange002() {
return new TopicExchange("topic002", true, false);
}
@Bean
public Queue queue002() {
return new Queue("queue002", true);//隊列持久化
}
@Bean
public Binding binding002() {
return BindingBuilder.bind(queue002()).to(exchange002()).with("rabbit.*");
}
@Bean
public TopicExchange exchange003() {
return new TopicExchange("topic003", true, false);
}
@Bean
public Queue queue003() {
return new Queue("queue003", true);//隊列持久化
}
@Bean
public Binding binding003() {
return BindingBuilder.bind(queue003()).to(exchange003()).with("mq.*");
}
@Bean
public Queue queue_image() {
return new Queue("image_queue", true);//隊列持久化
}
@Bean
public Queue queue_pdf() {
return new Queue("pdf_queue", true);//隊列持久化
}
/*
* 簡單消息監聽容器
*/
@Bean
public SimpleMessageListenerContainer messageContainer(ConnectionFactory connectionFactory) {
SimpleMessageListenerContainer container = new SimpleMessageListenerContainer(connectionFactory);
//同時監聽多個隊列
container.setQueues(queue001(), queue002(), queue003(), queue_image(), queue_pdf());
//設置當前的消費者數量
container.setConcurrentConsumers(1);
container.setMaxConcurrentConsumers(5);
//設置是否重回隊列
container.setDefaultRequeueRejected(false);
//設置自動簽收
container.setAcknowledgeMode(AcknowledgeMode.AUTO);
//設置監聽外露
container.setExposeListenerChannel(true);
//設置消費端標籤策略
container.setConsumerTagStrategy(new ConsumerTagStrategy() {
@Override
public String createConsumerTag(String queue) {
return queue + "_" + UUID.randomUUID().toString();
}
});
//設置消息監聽
container.setMessageListener(new ChannelAwareMessageListener() {
@Override
public void onMessage(Message message, Channel channel) throws Exception {
String msg = new String(message.getBody(), "utf-8");
System.out.println("-----------消費者:" + msg);
}
});
return container;
}
}
@Test
public void testSendMessage2() throws Exception {
//1 創建消息
MessageProperties messageProperties = new MessageProperties();
messageProperties.setContentType("text/plain");
Message message = new Message("mq 消息1234".getBytes(), messageProperties);
rabbitTemplate.send("topic001", "spring.abc", message);
rabbitTemplate.convertAndSend("topic001", "spring.amqp", "hello object message send!");
rabbitTemplate.convertAndSend("topic002", "rabbit.abc", "hello object message send!");
}