带有 EJB3.0 和 websphere6.1 的无状态会话 bean 的问题答案

【问题标题】：problems with Stateless session bean with EJB3.0 and websphere6.1带有 EJB3.0 和 websphere6.1 的无状态会话 bean 的问题
【发布时间】：2012-04-22 04:17:21
【问题描述】：

**我无法使用 EJB3.0 和 Websphere 6.1 创建无状态会话 bean。

我将所有内容打包在 EAR 文件中并将其部署在 Websphere 上。我正在尝试创建一个无状态会话 bean 并期望它实例化会话 bean 并调用 ejbCreate()。**

Following is my code and xml file.

package com.aa.otrs.datacollector.reject.ejb;

import javax.annotation.Resource;
import javax.ejb.Stateless;
import javax.ejb.Timeout;
import javax.ejb.Timer;
import javax.ejb.TimerService;
import javax.interceptor.Interceptors;
import com.aa.otrs.datacollector.logging.DataCollectorLogger;
import com.aa.otrs.fraudnet.service.FraudNetSoapWrapperService;
import com.google.inject.Inject;

@Stateless
@Interceptors(GuiceInterceptor.class)
public class RejectServiceBean implements IRejectServiceBean{

     @Inject
     private DataCollectorLogger logger;
     @SuppressWarnings("unused")
     @Inject
            private FraudNetSoapWrapperService fraudnetWebService;
     @Resource
     private TimerService timerService;

     public void ejbCreate() throws javax.ejb.CreateException {
         logger.debug("On ejbCreate");
         logger.debug(“RejectServiceBean ");

     }

     public void ejbActivate() {
         logger.debug("ejbActivate");
     }

}

This is ibm-ejb-jar-bnd xml file under META-INF folder.

<ejb-jar-bnd xmlns="http://websphere.ibm.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://websphere.ibm.com/xml/ns/javaee     http://websphere.ibm.com/xml/ns/javaee/ibm-ejb-jar-bnd_1_0.xsd"
    version="1.0">
    <message-driven name="PnrMessageBean">
        <listener-port name="RECLOCATOR.LP" />
    </message-driven>

    <session name="RejectServiceBean">
    <interface class="com.aa.otrs.datacollector.reject.ejb.IRejectServiceBean" 
                binding-name="ejblocal:ejb/RejectServiceBean"/>
    </session>

</ejb-jar-bnd>

import javax.ejb.Local;

@Local
public interface IRejectServiceBean {

    void callingInterface();
}

I have tried implementing stateless session with or without interface and xml file. 

import com.google.inject.Inject;
import javax.annotation.Resource;
import javax.ejb.Stateless;
import javax.ejb.TimedObject;
import javax.ejb.Timeout;
import javax.ejb.Timer;
import javax.ejb.TimerService;
import javax.interceptor.Interceptors;
import com.aa.otrs.datacollector.logging.DataCollectorLogger;
import com.aa.otrs.fraudnet.service.FraudNetSoapWrapperService;


@Stateless
@Interceptors(GuiceInterceptor.class)
public class RejectServiceSessionBean {
     @Inject
     private DataCollectorLogger logger;
     @Inject
     private FraudNetSoapWrapperService fraudnetWebService;


     public void ejbCreate() throws javax.ejb.CreateException {
         logger.debug("On ejbCreate");
         logger.debug("In RejectServiceSessionBean constructor");

     }
     public void ejbActivate() {
         logger.debug("ejbActivate");
     }


public class GuiceInterceptor{
       private static final Injector injector = Guice.createInjector(new EjbEnvironmentModule());

       @PostConstruct
       @PostActivate
       public void autowireBean(InvocationContext invocationContext) {
           Object target = invocationContext.getTarget();
           injector.injectMembers(target);
       }


    }

问题：从上面的两个代码 sn-p 它永远不会调用 ejbCreate 或 ejbActivate 方法。我已经放置了记录器，以便我可以验证它是否通过这些方法。

【问题讨论】：

标签： session ejb-3.0 javabeans stateless

【解决方案1】：

对于 EJB-3.0 无状态 bean，您可以通过使用 @PostConstruct 和 @PreDestroy 注释来拥有生命周期回调方法。

这些方法必须是公共的，返回 void & 不带任何参数。

【讨论】：