ActiveMQ实战篇之 java和spring xml创建Broker(一)

最新推荐文章于 2022-12-24 11:29:02 发布

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最新推荐文章于 2022-12-24 11:29:02 发布

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分类专栏： ActivityMQ学习文章标签： activityMQ

本文链接：https://blog.youkuaiyun.com/qq_33394088/article/details/77646464

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本文探讨如何使用纯Java代码和Spring XML配置来创建ActiveMQ Broker。通过这种方式，可以深入了解ActiveMQ的工作原理。在Java实现中，启动Broker后需额外代码以确保Jetty服务器运行。而在Spring XML实现中，需配置Factory并利用XBeanBrokerFactory来创建Broker。

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ActivityMQ创建broker是直接通过配置IOC注入的，所以了解如何用纯JAVA代码和spring xml 创建broker可以让我们对AcitivtyMQ有一个更深入的了解

原本的配置

<broker xmlns="http://activemq.apache.org/schema/core" brokerName="myBroker" dataDirectory="${activemq.base}/data">
          <transportConnectors>
           <transportConnector name="openwire"
            uri="tcp://localhost:61616" />
          </transportConnectors>
         <plugins>
            <simpleAuthenticationPlugin>
             <users>
               <authenticationUser username="admin"
                                   password="password"
                                   groups="admins,publishers,consumers"/>
               <authenticationUser username="publisher"
                                   password="password"
                                   groups="publishers,consumers"/>
               <authenticationUser username="consumer"
                                   password="password"
                                   groups="consumers"/>
               <authenticationUser username="guest"
                                   password="password"
                                   groups="guests"/>
              </users>
            </simpleAuthenticationPlugin>
          </plugins>
</broker>

用纯JAVA实现

BrokerService broker =
                new BrokerService();
        broker.setBrokerName("myBroker");
        broker.setDataDirectory("data/");
        SimpleAuthenticationPlugin authentication = new SimpleAuthenticationPlugin();
        List<AuthenticationUser> users = new ArrayList<AuthenticationUser>();
        users.add(new AuthenticationUser("admin", "password", "admins,publishers,consumers"));
        users.add(new AuthenticationUser("publisher", "password", "publishers,consumers"));
        users.add(new AuthenticationUser("consumer", "password", "consumers"));
        users.add(new AuthenticationUser("guest", "password", "guests"));
        authentication.setUsers(users);
        broker.setPlugins(new BrokerPlugin[] { authentication });
        broker.addConnector("tcp://localhost:61616");
        broker.start();
        System.out.println();
        System.out.println("Press any key to stop the broker");
        System.out.println();
        System.in.read();

可以实现同样的功能，但是运行之后我们可以看到tcp端口61616开启用于监听，但是，和配置实现不同的是，纯java实现并没有开启服务器，于是我们再模仿开启服务器操作。

HTTPDiscoveryAgent httpDiscoveryAgent = new HTTPDiscoveryAgent();
httpDiscoveryAgent.setStartEmbeddRegistry(true);
httpDiscoveryAgent.setRegistryURL("http://localhost:8161");
System.out.println(httpDiscoveryAgent.getRegistryURL());
httpDiscoveryAgent.start();
broker.addService(httpDiscoveryAgent);

只需要在broker.start前面加上这段代码即可，这段具体怎么做？需要进行源码搜索源码分析才能知道为什么这么做，当然有时候需要打断点查看哪一段代码有错误或者缺了什么包。

需要这些包
这里写图片描述
这样jetty服务器能够正常开启了

用spring xml实现

在项目的根目录上加上spring配置文件

<beans xmlns="http://www.springframework.org/schema/beans" xmlns:amq="http://activemq.apache.org/schema/core" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd http://activemq.apache.org/schema/core http://activemq.apache.org/schema/core/activemq-core.xsd">
<amq:broker
brokerName="localhost" dataDirectory="${activemq.base}/data">
  <amq:transportConnectors>
   <amq:transportConnector name="openwire"
    uri="tcp://localhost:61616" />
  </amq:transportConnectors>
  <amq:plugins>
   <amq:simpleAuthenticationPlugin>
    <amq:users>
     <amq:authenticationUser username="admin"
                             password="password"
                               groups="admins,publishers,consumers"/>
     <amq:authenticationUser username="publisher"
                             password="password"
                             groups="publishers,consumers"/>
     <amq:authenticationUser username="consumer"
                             password="password"
                             groups="consumers"/>
     <amq:authenticationUser username="guest"
                             password="password"
                             groups="guests"/>
    </amq:users>
   </amq:simpleAuthenticationPlugin>
  </amq:plugins>
 </amq:broker>
</beans>

添加一个Factory，负责创建Broker

package com.tgb.activemq;

import java.net.URI;

import org.apache.activemq.broker.BrokerFactory;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.xbean.XBeanBrokerFactory;

public class Factory {
    public static void main(String[] args) throws Exception {
        System.setProperty("activemq.base", System.getProperty("user.dir"));
        String configUri = "xbean:Spring-simgle.xml";
        URI brokerUri = new URI(configUri);
        BrokerService broker = BrokerFactory.createBroker(brokerUri);
        broker.start();
        System.out.println();
        System.out.println("Press any key to stop the broker");
        System.out.println();
        System.in.read();
    }
}