java - Quartz 作业中的 Websphere JNDI 查找失败

Question

做一些可以帮助我在 Quartz 作业中初始化 EJB

我有这样的 quartz :

@DisallowConcurrentExecution
public class TestJob implements Job{

private TestEJBServiceLocal testEJBService;

private void initEJB() {
   this.testEJBService = new JNDIUtil()
            .getByJndiName("java:comp/env/ejb/TestEJBService");
}
@Override
public void execute(JobExecutionContext arg0) throws JobExecutionException {
    // DO STUFF
}
}

在 Web XML 中我有:

<ejb-local-ref>
        <description />
        <ejb-ref-name>ejb/TestEJBService</ejb-ref-name>
        <ejb-ref-type>Session</ejb-ref-type>
        <local-home />
        <local>com.ibm.blue.ejb.TestEJBServiceLocal</local>
        <ejb-link>TestEJBService</ejb-link>
    </ejb-local-ref>

Liberty 配置文件无法初始化 EJB，但出现异常:

2015-06-04 16:18:00 ERROR JNDIUtil:38 - JNDIUtil lookup error;
javax.naming.NamingException: CWNEN1000E: A JNDI operation on a java:comp/env name cannot be completed because the current thread is not associated with a Java Enterprise Edition application component. This condition can occur when the JNDI client using the java:comp/env name does not occur on the thread of a server application request. Make sure that a Java EE application does not run JNDI operations on java:comp/env names within static code blocks or in threads created by that application. Such code does not necessarily run on the thread of a server application request and therefore is not supported by JNDI operations on java:comp/env names.
    at com.ibm.ws.injectionengine.osgi.internal.naming.InjectionJavaColonHelper.getInjectionScopeData(InjectionJavaColonHelper.java:110)
    at com.ibm.ws.injectionengine.osgi.internal.naming.InjectionJavaColonHelper.getObjectInstance(InjectionJavaColonHelper.java:67)
    at com.ibm.ws.jndi.url.contexts.javacolon.internal.JavaURLContext.lookup(JavaURLContext.java:319)
    at com.ibm.ws.jndi.url.contexts.javacolon.internal.JavaURLContext.lookup(JavaURLContext.java:357)
    at org.apache.aries.jndi.DelegateContext.lookup(DelegateContext.java:161)
    at javax.naming.InitialContext.lookup(InitialContext.java:423)
    at JNDIUtil.lookup(JNDIUtil.java:36)
    at getByJndiName(JNDIUtil.java:24)
    at Job.initEJB(Job.java:52)
    at execute(Job.java:68)
    at org.quartz.core.JobRunShell.run(JobRunShell.java:202)
    at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:573)
2015-06-04 16:18:00 ERROR JNDIUtil:38 - JNDIUtil lookup error;

我正在运行 IBM Liberty 配置文件 V.8.5.5.5

更新

我尝试更新 JNDI 查找字符串(全局 JNDI 在应用程序启动期间打印在 trace.log 中)，但仍然遇到相同的异常。这是我在工作中的更新:

private void initEJB() {
   Context context;
   String jndi = "java:global/TestEAR/TestEJBS/TestEJBService!com.ibm.blue.ejb.TestEJBServiceLocal"
   try{
      context = new InitialContext();
      this.testEJBService = (TestEJBServiceLocal)context.lookup(jndi); 
       } catch (NamingException e) {
        System.out.println("-->Test with InitialContext: Error");
        e.printStackTrace();
    }
  try {
        this.testEJBService = new JNDIUtil().getByJndiName(jndi);
    } catch (Exception e) {
        System.err.println("-->Test with JNDIUtil: Error");
        e.printStackTrace();
    }
 }

这是输出日志:

[err] -->Test with InitialContext: Error
[err] javax.naming.NamingException: CWNEN1000E: A JNDI operation on a java:comp/env name cannot be completed because the current thread is not associated with a Java Enterprise Edition application component. This condition can occur when the JNDI client using the java:comp/env name does not occur on the thread of a server application request. Make sure that a Java EE application does not run JNDI operations on java:comp/env names within static code blocks or in threads created by that application. Such code does not necessarily run on the thread of a server application request and therefore is not supported by JNDI operations on java:comp/env names.
[err]   at com.ibm.ws.injectionengine.osgi.internal.naming.InjectionJavaColonHelper.getInjectionScopeData(InjectionJavaColonHelper.java:110)
[err]   at com.ibm.ws.injectionengine.osgi.internal.naming.InjectionJavaColonHelper.getObjectInstance(InjectionJavaColonHelper.java:67)
[err]   at com.ibm.ws.jndi.url.contexts.javacolon.internal.JavaURLContext.lookup(JavaURLContext.java:319)
[err]   at com.ibm.ws.jndi.url.contexts.javacolon.internal.JavaURLContext.lookup(JavaURLContext.java:357)
[err]   at org.apache.aries.jndi.DelegateContext.lookup(DelegateContext.java:161)
[err]   at javax.naming.InitialContext.lookup(InitialContext.java:423)
[err]   at Job.initEJB(Job.java:38)
[err]   at execute(Job.java:75)
[err]   at org.quartz.core.JobRunShell.run(JobRunShell.java:202)
[err]   at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:573)
[err] -->Test with JNDIUtil: Error
[err] java.lang.RuntimeException: Cannot get bean by JNDI name; JNDI=java:global/TestEAR/TestEJBS/TestEJBService!com.ibm.blue.ejb.TestEJBServiceLocal
[err]   at JNDIUtil.lookup(JNDIUtil.java:39)
[err]   at JNDIUtil.getByJndiName(JNDIUtil.java:24)
[err]   at initEJB(Job.java:62)
[err]   at Job.execute(Job.java:75)
[err]   at org.quartz.core.JobRunShell.run(JobRunShell.java:202)
[err]   at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:573)
[err] Caused by: 
[err] javax.naming.NamingException: CWNEN1000E: A JNDI operation on a java:comp/env name cannot be completed because the current thread is not associated with a Java Enterprise Edition application component. This condition can occur when the JNDI client using the java:comp/env name does not occur on the thread of a server application request. Make sure that a Java EE application does not run JNDI operations on java:comp/env names within static code blocks or in threads created by that application. Such code does not necessarily run on the thread of a server application request and therefore is not supported by JNDI operations on java:comp/env names.
[err]   at com.ibm.ws.injectionengine.osgi.internal.naming.InjectionJavaColonHelper.getInjectionScopeData(InjectionJavaColonHelper.java:110)
[err]   at com.ibm.ws.injectionengine.osgi.internal.naming.InjectionJavaColonHelper.getObjectInstance(InjectionJavaColonHelper.java:67)
[err]   at com.ibm.ws.jndi.url.contexts.javacolon.internal.JavaURLContext.lookup(JavaURLContext.java:319)
[err]   at com.ibm.ws.jndi.url.contexts.javacolon.internal.JavaURLContext.lookup(JavaURLContext.java:357)
[err]   at org.apache.aries.jndi.DelegateContext.lookup(DelegateContext.java:161)
[err]   at javax.naming.InitialContext.lookup(InitialContext.java:423)
[err]   at JNDIUtil.lookup(JNDIUtil.java:36)
[err]   ... 5 more

Answer 1

Quartz 使用非托管线程，因此 java:comp/env 命名空间和引用在那里不可用。

您可以:

• 使用 EJB 的完整 JNDI 名称<=== UPDATE2 我暂时无法让它通过非托管线程的本地接口(interface)运行(我没有时间再玩它)现在)。因此，您要么需要使用 Liberty Beta(它支持远程 EJB)，要么更改您的 bean 以具有远程接口(interface)。或者您可以尝试将 Quartz 配置为使用 Liberty 并发功能提供的托管线程工厂(以类似 here 的方式(但这适用于完整的 WAS)。我没有尝试过，所以不知道它是否实际上是可能)。

• 或者，什么可能会更好，而不是使用 Quartz

  WebSphere Liberty 的
  • concurrent-1.0 功能，它使用托管线程并可以访问 Java EE 上下文，例如 Managed scheduled executor
  • 或使用 EJB 计时器和 @Schedule 注释。

更新
当它被服务器绑定(bind)时，您可以在消息日志中找到完整的 JNDI 名称，如下所示:

[INFO    ] CNTR0167I: The server is binding the test.Hello interface of the Hello enterprise bean in the HelloEJBLocal.war module of the HelloEJBLocal application.  
The binding location is: java:global/HelloEJBLocal/Hello!test.Hello

然后使用以下命令查找它(这只适用于 Java EE 应用程序组件或托管线程):

ctx.lookup("java:global/HelloEJBLocal/Hello!test.Hello");