JBoss Fuse - AMQ 和 Camel

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在本节中，我们将学习有关 ActiveMQ 如何与 Camel 协作工作的基本知识。

配置 ActiveMQ 组件

在我们可以在代码中使用 ActiveMQ 队列或主题之前，我们必须配置 ActiveMQComponent。可以使用如下所示程序来执行 ActiveMQComponent 的最小配置 −

<bean id = "activemq" class = "org.apache.activemq.camel.component.ActiveMQComponent">
   <property name = "brokerURL" value = "tcp://:61616"/>
   <property name = "userName" value = "admin"/>
   <property name = "password" value = "admin"/>
</bean>

• brokerURL − 指定 AMQ Broker 的主机和端口。

• username − 指定用于连接 AMQ Broker 的用户名。

• password − 指定用于连接 AMQ Broker 的密码。

连接到队列

既然我们已经配置了 ActiveMQComponent，我们就可以在自己的 CamelContext 中使用它作为端点。

我们将在以下格式中使用 AMQ 端点 −

Activemq:[queue|topic]:[queueName|topicName]

向 AMQ 写入消息

<?xml version = "1.0" encoding="UTF-8"?>
<!-- Configures the Camel Context-->
<beans xmlns = "http://www.springframework.org/schema/beans"
   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.xsd
   http://camel.apache.org/schema/spring
   http://camel.apache.org/schema/spring/camel-spring.xsd">

在此包部署到 Fuse 容器中后，你应该能够看到发布到 AMQ 的消息，这些消息作为文件放置在 D:/src/data 中。

输入

D:/src/data/input.txt

Test me

输出

从 AMQ 读写

<?xml version = "1.0" encoding = "UTF-8"?>
<!-- Configures the Camel Context-->

<beans xmlns = "http://www.springframework.org/schema/beans"
   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.xsd
   http://camel.apache.org/schema/spring
   http://camel.apache.org/schema/spring/camel-spring.xsd">
	
   <camelContext xmlns = "http://camel.apache.org/schema/spring">
      <!-- here is a sample which processes the input files
         (leaving them in place - see the 'noop' flag)
          then performs content based routing on the message using XPath -->
			 
      <route>
         <from uri = "activemq:queue:TestQ"/>
         <to uri = "file:///d:/src"/>
      </route>
   </camelContext>
	
   <bean id = "activemq" class = "org.apache.activemq.camel.component.ActiveMQComponent">
      <property name = "brokerURL" value = "tcp://:61616"/>
      <property name = "userName" value = "admin"/>
      <property name = "password" value = "admin"/>
   </bean>
	
</beans>

输入

部署此包后，你应该看到在 D:/src 中生成文件并且使用者消息也被使用。还应该显示针对该队列的使用者。

输出

D:/src

Test me

写入主题

<?xml version = "1.0" encoding = "UTF-8"?>
<!-- Configures the Camel Context-->
<beans xmlns = "http://www.springframework.org/schema/beans"
   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.xsd
   http://camel.apache.org/schema/spring 
   http://camel.apache.org/schema/spring/camel-spring.xsd">
	
   <camelContext xmlns = "http://camel.apache.org/schema/spring">
      <!-- here is a sample which processes the input files
         (leaving them in place - see the 'noop' flag)
          then performs content based routing on the message using XPath -->
			 
      <route>
         <from uri = "file:///d:/src"/>
         <to uri = "activemq:topic:TestTopic” />
      </route>
   </camelContext>
	
   <bean id = "activemq" class = "org.apache.activemq.camel.component.ActiveMQComponent">
      <property name = "brokerURL" value = "tcp://:61616"/>
      <property name = "userName" value = "admin"/>
      <property name = "password" value = "admin"/>
   </bean>
	
</beans>

从主题读写

<?xml version = "1.0" encoding = "UTF-8"?>
<!-- Configures the Camel Context-->
<beans xmlns = "http://www.springframework.org/schema/beans"
   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.xsd
   http://camel.apache.org/schema/spring 
   http://camel.apache.org/schema/spring/camel-spring.xsd">
	
   <camelContext xmlns = "http://camel.apache.org/schema/spring">
      <!-- here is a sample which processes the input files
         (leaving them in place - see the 'noop' flag)
         then performs content based routing on the message using XPath -->
			
      <route>
         <from uri = "activemq:topic:TestTopic"/>
         <to uri = "file:///d:/src2"/>
      </route>
   </camelContext>
	
   <bean id = "activemq" class = "org.apache.activemq.camel.component.ActiveMQComponent">
      <property name = "brokerURL" value="tcp://:61616"/>
      <property name = "userName" value = "admin"/>
      <property name = "password" value = "admin"/>
   </bean>
	
</beans>

输入

D:/src/file1.xml

<order>
   <data>
      <value>value1</value>
   </data>
</order>

<order>
   <data>
      <value>value2</value>
   </data>
</order>

<order>
   <data>
      <value>value3</value>
   </data>
</order>

输出

D:/src/

<order>
   <data>
      <value>value1</value>
   </data>
</order>

<order>
   <data>
      <value>value2</value>
   </data>
</order>

<order>
   <data>
      <value>value3</value>
   </data>
</order>