SpringBoot整合中间件RabbitMQ（六）

使用AmqpAdmin创建，删除Queue，Exchanges，Binding。

1.注入 AmqpAdmin

    @Autowired
    AmqpAdmin amqpAdmin;

AmqpAdmin是由RabbitAutoConfiguration 自动注入的。

Path：org.springframework.boot.autoconfigure.amqp.RabbitAutoConfiguration

2.创建交换器Exchange

比如创建：DirectExchange

调用amqpAdmin的declareExchange方法。

package com.invi;

import com.invi.bean.Book;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.amqp.core.AmqpAdmin;
import org.springframework.amqp.core.DirectExchange;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;

@RunWith(SpringRunner.class)
@SpringBootTest
public class Springboot02AmqpApplicationTests {

    //使用*AmqpAdmin*创建，删除Queue，Exchanges，Binding。

    @Autowired
    AmqpAdmin amqpAdmin;

    @Test
    public void createExchange() {
        DirectExchange directExchange = new DirectExchange("AmqpAdmin-DirectExchange");
        amqpAdmin.declareExchange(directExchange);
    }
}

amqpAdmin.declareXXXX() 都是创建组件的方法哦。

接口: org.springframework.amqp.core.Exchange

实现类：

• AbstractExchange (org.springframework.amqp.core)
  • DirectExchange (org.springframework.amqp.core)
  • FanoutExchange (org.springframework.amqp.core)
  • CustomExchange (org.springframework.amqp.core)
  • TopicExchange (org.springframework.amqp.core)
  • HeadersExchange (org.springframework.amqp.core)

DirectExchange 可以通过构造方法定制：

org.springframework.amqp.core.DirectExchange#DirectExchange(java.lang.String)

package org.springframework.amqp.core;

import java.util.Map;

public class DirectExchange extends AbstractExchange {

  public static final DirectExchange DEFAULT = new DirectExchange("");


  public DirectExchange(String name) {
      super(name);
  }

  public DirectExchange(String name, boolean durable, boolean autoDelete) {
      super(name, durable, autoDelete);
  }

  public DirectExchange(String name, boolean durable, boolean autoDelete, Map arguments) {
      super(name, durable, autoDelete, arguments);
  }

  @Override
  public final String getType() {
      return ExchangeTypes.DIRECT;
  }

}

运行测试方法：

Name	Type	Features	Message rate in	Message rate out
(AMQP default)	direct	D
AmqpAdmin-DirectExchange	direct	D
amq.direct	direct	D
amq.fanout	fanout	D
amq.headers	headers	D
amq.match	headers	D
amq.rabbitmq.trace	topic	D I
amq.topic	topic	D
exchange.direct	direct	D	0.00/s	0.00/s

发现已经创建好新的Exchange：AmqpAdmin-DirectExchange ,类型 direct !

3.创建队列Queue

编码：

    @Autowired
    AmqpAdmin amqpAdmin;

    @Test
    public void createQueue() {
        //通过构造方法 定制队列属性
        Queue queue = new Queue("AmqpAdmin-Queue", true);
        amqpAdmin.declareQueue(queue);
    }

Queue可以通过构造方法定制：

package org.springframework.amqp.core;

import java.util.Map;

import org.springframework.util.Assert;

public class Queue extends AbstractDeclarable {

  private final String name;

  private final boolean durable;

  private final boolean exclusive;

  private final boolean autoDelete;

  private final java.util.Map arguments;

 
  public Queue(String name) { this(name, true, false, false); }

 
  public Queue(String name, boolean durable) { this(name, durable, false, false, null); }
    

  /**
   * 构造一个新的队列，给定一个名称、持久性、排他性和自动删除标志。
     * @param name 指定队列的名称。
     * @param durable 为true如果我们声明一个耐久队列(该队列将在服务器重启后存活)
     * @param exclusive 为true如果我们声明了一个独占队列(队列只会被声明者使用连接)
     * @param autoDelete为true 如果服务器在队列不再使用时应该删除队列， 
   */
  public Queue(String name, boolean durable, boolean exclusive, boolean autoDelete)  {
      this(name, durable, exclusive, autoDelete, null);
  }

  ......

}

运行测试方法：

Overview	Messages	Message rates	+/-
Name	Features	State	Ready	Unacked	Total	incoming	deliver / get	ack
AmqpAdmin-Queue	D	idle	0	0	0
unionpaysmart	D	idle	1	0	1	0.00/s	0.00/s	0.00/s
unionpaysmart.news	D	idle	1	0	1	0.00/s	0.00/s	0.00/s
invi	D	idle	1	0	1	0.00/s	0.00/s	0.00/s
invi.emps	D	idle	1	0	1	0.00/s	0.00/s	0.00/s
invi.idea	D	idle	1	0	1	0.00/s	0.00/s	0.00/s
invi.news	D	idle	0	0	0	0.00/s	0.00/s	0.00/s

队列 AmqpAdmin-Queue 已经被创建。

4.将交换器和队列绑定。

编码:

    @Autowired
    AmqpAdmin amqpAdmin; 

    @Test
    public void createBinding() {
        Binding binding
                = new Binding("AmqpAdmin-Queue", Binding.DestinationType.QUEUE, "AmqpAdmin-DirectExchange", "AmqpAdmin-routingKey", null);
        amqpAdmin.declareBinding(binding);
    }

构造Binding：

• String destination 目的地

  • 和那个队列绑定：AmqpAdmin-Queue ，......

• DestinationType destinationType 目的地类型（ QUEUE, EXCHANGE;）

  • Binding.DestinationType.QUEUE
  • Binding.DestinationType.EXCHANGE

• String exchange 交换器名

• String routingKey 路由键 自定义名字

• Map arguments 参数头信息 ，没有的话 写NULL

源码Binding类：

package org.springframework.amqp.core;

import java.util.Map;

public class Binding extends AbstractDeclarable {

    public enum DestinationType {
        QUEUE, EXCHANGE;
    }

    private final String destination;

    private final String exchange;

    private final String routingKey;

    private final Map arguments;

    private final DestinationType destinationType;

    public Binding(String destination, DestinationType destinationType, String exchange, String routingKey,
            Map arguments) {
        this.destination = destination;
        this.destinationType = destinationType;
        this.exchange = exchange;
        this.routingKey = routingKey;
        this.arguments = arguments;
    }

    public String getDestination() {
        return this.destination;
    }

    public DestinationType getDestinationType() {
        return this.destinationType;
    }

    public String getExchange() {
        return this.exchange;
    }

    public String getRoutingKey() {
        return this.routingKey;
    }

    public Map getArguments() {
        return this.arguments;
    }

    public boolean isDestinationQueue() {
        return DestinationType.QUEUE.equals(this.destinationType);
    }

    @Override
    public String toString() {
        return "Binding [destination=" + this.destination + ", exchange=" + this.exchange + ", routingKey="
                    + this.routingKey + "]";
    }

}

Exchange: AmqpAdmin-DirectExchange 默认

... no bindings ...

运行测试方法：

To	Routing key	Arguments
AmqpAdmin-Queue	AmqpAdmin-routingKey

至此已经完成了：AmqpAdmin-DirectExchange 和 AmqpAdmin-Queue的绑定。