如何将一个会话Bean注入消息驱动Bean？ [英] How to inject a Session Bean into a Message Driven Bean?

问题描述

我想将一个无状态会话bean注入到Java EE中，因此这可能是愚蠢的。一个消息驱动的bean。基本上，MDB获取JMS消息，然后使用会话bean执行工作。会话Bean拥有业务逻辑。

这是我的Session Bean：

  @Stateless 
 public class TestBean implements TestBeanRemote {
 
 public void doSomething（）{
 //商业逻辑转到这里
} 
} 
  

匹配界面：

  @Remote 
 public interface TestBeanRemote {
 
 public void doSomething（）; 
} 
  

这是我的MDB：

  @MessageDriven（mappedName =jms / mvs.TestController，activationConfig = {
 @ActivationConfigProperty（propertyName =acknowledgeMode，propertyValue =Auto-acknowledge）， 
 @ActivationConfigProperty（propertyName =destinationType，propertyValue =javax.jms.Queue）
}）
公共类TestController实现MessageListener {
 
 @EJB 
私人TestBean testBean; 
 $ b $ public TestController（）{
} 
 
 public void onMessage（Message message）{
 testBean.doSomething（）; 
 
 
 $ / code> 

到目前为止，并非火箭科学，对吗？ p>



不幸的是，在将这部署到glassfish v3并向相应的JMS队列发送消息时，出现glassfish无法找到TestBean EJB的错误：

  java.lang.IllegalStateException：尝试注入Remote的异常ejb-ref name = mvs.test.TestController / testBean，Remote 3.x interface = mvs .test.TestBean，ejb-link = null，lookup = null，mappedName =，jndi-name = mvs.test.TestBean，refType =会话到类mvs.test.TestController 
引起：com.sun.enterprise .container.common.spi.util.InjectionException：异常尝试注入远程ejb-ref名称= mvs.test.TestController / testBean，远程3.x接口= mvs.test.TestBean，ejb-link = null，lookup = null ，mappedName =，jndi-name = mvs.test.TestBean，refType = Session到类mvs.test.TestController 
导致：javax.naming.NamingException：查找失败的'java：comp / env / mvs.test .TestControll er / testBean'in SerialContext [根异常是javax.naming.NamingException：异常解析Ejb for'远程ejb-ref名称= mvs.test.TestController / testBean，远程3.x接口= mvs.test.TestBean，ejb-link = null，lookup = null，mappedName =，jndi-name = mvs.test.TestBean，refType = Session'。实际（可能内部）用于查找的远程JNDI名称是'mvs.test.TestBean＃mvs.test.TestBean'[根异常是javax.naming.NamingException：'mvs.test.TestBean＃mvs.test.TestBean查找失败'in SerialContext [根异常是javax.naming.NameNotFoundException：mvs.test.TestBean＃mvs.test.TestBean not found]]] 
  

所以我的问题是：



• 这是将会话bean注入另一个bean的正确方法（特别是一个消息驱动的bean）？


• 为什么命名查找失败？
  

解决方案

好的，我发现如果将注释@LocalBean添加到会话bean中，它就可以工作。什么......？

I'm reasonably new to Java EE, so this might be stupid.. bear with me pls :D

I would like to inject a stateless session bean into a message-driven bean. Basically, the MDB gets a JMS message, then uses a session bean to perform the work. The session bean holds the business logic.

Here's my Session Bean:

@Stateless
public class TestBean implements TestBeanRemote {

  public void doSomething() {
    // business logic goes here
  }
}

The matching interface:

@Remote
public interface TestBeanRemote {

  public void doSomething();
}

Here's my MDB:

@MessageDriven(mappedName = "jms/mvs.TestController", activationConfig =  {
@ActivationConfigProperty(propertyName = "acknowledgeMode", propertyValue = "Auto-acknowledge"),
@ActivationConfigProperty(propertyName = "destinationType", propertyValue = "javax.jms.Queue")
    })
public class TestController implements MessageListener {

 @EJB
 private TestBean testBean;

    public TestController() {
    }

    public void onMessage(Message message) {
      testBean.doSomething();
    }
}

So far, not rocket science, right?

Unfortunately, when deploying this to glassfish v3, and sending a message to the appropriate JMS Queue, I get errors that glassfish is unable to locate the TestBean EJB:

java.lang.IllegalStateException: Exception attempting to inject Remote ejb-ref name=mvs.test.TestController/testBean,Remote 3.x interface =mvs.test.TestBean,ejb-link=null,lookup=null,mappedName=,jndi-name=mvs.test.TestBean,refType=Session into class mvs.test.TestController
Caused by: com.sun.enterprise.container.common.spi.util.InjectionException: Exception attempting to inject Remote ejb-ref name=mvs.test.TestController/testBean,Remote 3.x interface =mvs.test.TestBean,ejb-link=null,lookup=null,mappedName=,jndi-name=mvs.test.TestBean,refType=Session into class mvs.test.TestController
Caused by: javax.naming.NamingException: Lookup failed for 'java:comp/env/mvs.test.TestController/testBean' in SerialContext  [Root exception is javax.naming.NamingException: Exception resolving Ejb for 'Remote ejb-ref name=mvs.test.TestController/testBean,Remote 3.x interface =mvs.test.TestBean,ejb-link=null,lookup=null,mappedName=,jndi-name=mvs.test.TestBean,refType=Session' .  Actual (possibly internal) Remote JNDI name used for lookup is 'mvs.test.TestBean#mvs.test.TestBean' [Root exception is javax.naming.NamingException: Lookup failed for 'mvs.test.TestBean#mvs.test.TestBean' in SerialContext  [Root exception is javax.naming.NameNotFoundException: mvs.test.TestBean#mvs.test.TestBean not found]]]

So my questions are:

• is this the correct way of injecting a session bean into another bean (particularly a message driven bean)?
• why is the naming lookup failing?

解决方案

Ok, I found out that if I add the annotation @LocalBean to the session bean, it works. What the ...?

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