如何从bean.xml中获取bean值

Question

我们正在使用Apache Camel and Spring将3个使用消息的消费者编写为Activemq队列名称为ThermalMap。

我是Spring的新手，我尝试从bean.xml获取特定的beanId（“amqLinkId”）值。为此，我编写了以下3个文件。

VariablesDeclarations.java

public class VariablesDeclarations { 
private String amqLink; 
public String getAmqLink() { 
return amqLink; 
} 
public void setAmqLink(String amqLink) { 
this.amqLink = amqLink; 
} 
} 

FirstConsumer.java

import org.apache.camel.CamelContext; 
import org.springframework.context.ApplicationContext; 
import org.springframework.context.support.ClassPathXmlApplicationContext; 
public class FirstConsumer { 
     public static void main(String[] args) { 
    ApplicationContext contextObject=new ClassPathXmlApplicationContext("bean.xml"); 
     //Forwarding cursor to ConsumersMiddileWare class using CamelContext 
     CamelContext camelObject=contextObject.getBean("activeContext", CamelContext.class); 
     System.out.println("H"); 
} 
} 

ConsumersMiddileware.java

import org.apache.camel.builder.RouteBuilder; 
import org.springframework.beans.factory.BeanFactory; 
import org.springframework.context.support.ClassPathXmlApplicationContext; 
public class ConsumersMiddileWare extends RouteBuilder{ 
@Override 
public void configure() throws Exception { 
    System.out.println("Bye"); 
    BeanFactory beanFactory=new ClassPathXmlApplicationContext(new String[]{"bean.xml"}); 
    VariablesDeclarations vd=(VariablesDeclarations) beanFactory.getBean("amqLinkId"); 
    System.out.println(vd.getAmqLink()); 
} 
} 

bean.xml：

<?xml version="1.0" encoding="UTF-8"?> 
<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 
        http://activemq.apache.org/schema/core http://activemq.apache.org/schema/core/activemq-core-5.5.0.xsd 
        "> 

<!-- Creating camelContext element for forwarding to another ConsumersMiddileware class --> 
<camelContext id="activeContext" xmlns="http://camel.apache.org/schema/spring"> 
    <routeBuilder ref="consumerMiddileWareContext" /> 
</camelContext> 
<bean id="consumerMiddileWareContext" class="ActivemqPackage.ConsumersMiddileWare"></bean> 

<!-- Following bean created for getting variable values into classes--> 
<bean id="amqLinkId" class="ActivemqPackage.VariablesDeclarations"> 
    <property name="amqLink" value="activemq:queue:ThermalMap"></property> 
</bean> 
</beans> 

工作流程：

如果运行FirstConsumer.java，应该转发给ConsumersMiddileWare.java。还有我想从bean.xml找到amqLinkId值和分配给任何String对象。

如果我发现amqLinkId值，以后直接我想写下面的代码在ConsumersMiddileWare.java

String activeMqURI=vd.getAmqLink(); 
    from(activeMqURI).to("bean:activemqProcessor?method=processMessage"); 

问题：

如果我触发FirsrConsumer.java，它forwading到ConsumersMiddileWare.java。它的继续打印Bye不以如下方式打印amqLinkId值。

Bye 
Bye 
Bye 
Bye 
. 
. 

任何人都可以解释清楚。

感谢

Answer 1

有一个SpringRouteBuilder可以用来代替RouteBuilder。这个类有一些额外的方法来从Spring应用程序上下文豆类（如Spring的XML文件）

public class ConsumersMiddileWare extends SpringRouteBuilder{ 
@Override 
public void configure() throws Exception { 
    VariablesDeclarations vd = lookup("amqLinkId", VariablesDeclarations.class)' 
} 

和替代只是使用camelContext.getRegistry在常规RouteBuilder

public class ConsumersMiddileWare extends RouteBuilder{ 
@Override 
public void configure() throws Exception { 
    VariablesDeclarations vd = context().getRegistry().lookup("amqLinkId", VariablesDeclarations.class)' 
} 

Answer 2

的问题是，你的项目是不是能够找到SLF4J-简单1.6.2.jar。检查您是否在我们的项目构建路径中有它。如果没有添加，然后检查。此外，您所报告的实际问题以及之后编辑的问题完全是不同的问题。