有一個麻煩的問題,我找不到任何統一的方法來解決它在互聯網上。我正在開發一個使用Java EE,Glassfish和Netbeans的企業應用程序。從另一個Glassfish實例訪問一個無狀態的EJB
我有兩個Glassfish設置的實例,我正在構建一個企業應用程序拆分這兩個實例。我有一個網頁(有幾個JSP和幾個HttpServlet)在一個Glassfish實例上運行。另一方面,我想實現應用程序的業務邏輯。也就是說,我有一些Java Entity Beans,並且還有一個使用這些實體bean的遠程接口的EJB。
我的目標是能夠從glassfish的第一個實例的servlet遠程訪問EJB。我遵循了this post中的說明,但未成功。我提供的代碼片段,以獲得更具體的...
在Glassfish,EJB遠程接口的一個實例:
@Remote
public interface MyEjbRemote {
//...
}
和無狀態的bean:
@Stateless(name="ejb/MyEjb")
public class MyEjb implements MyEjbRemote {
//...
}
在其他實例:
public class MyServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
MyEjbRemote = lookupEjb();
//...
}
private MyEjbRemote lookupEjb() {
Properties props = new Properties();
props.setProperty("java.naming.factory.initial",
"com.sun.enterprise.naming.SerialInitContextFactory");
props.setProperty("java.naming.factory.url.pkgs",
"com.sun.enterprise.naming");
props.setProperty("java.naming.factory.state",
"com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl");
//default: localhost
props.setProperty("org.omg.CORBA.ORBInitialHost",
"localhost");
//default: 3700
props.setProperty("org.omg.CORBA.ORBInitialPort", "2037");
InitialContext ic = new InitialContext(props);
return (MyEjbRemote) ic.lookup("ejb/MyEjb");
}
}
不幸的是,當我啓動我的網站,並嘗試查找遠程ej b我收到以下例外情況:
WARNING: Internal error flushing the buffer in release()
WARNING: StandardWrapperValve[jsp]: PWC1406: Servlet.service() for servlet jsp threw exception
java.io.IOException: Stream closed
at org.apache.jasper.runtime.JspWriterImpl.ensureOpen(JspWriterImpl.java:277)
at org.apache.jasper.runtime.JspWriterImpl.clearBuffer(JspWriterImpl.java:222)
at org.apache.jsp.home_jsp._jspService(home_jsp.java from :76)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:109)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:406)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:483)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:373)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1523)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:188)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:641)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:97)
at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:85)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:185)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:325)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:226)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:165)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:791)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:693)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:954)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:170)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:135)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:102)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:88)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:76)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:53)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57)
at com.sun.grizzly.ContextTask.run(ContextTask.java:69)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:330)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:309)
at java.lang.Thread.run(Thread.java:662)
我的實現中缺少什麼?任何建議/想法?請詢問我的問題描述是否有遺漏,這是我第一次在本網站上發佈。我感謝你的時間!
Ilias
我已經改變了我的實現,按照指示[這裏](http://glassfish.java.net/javaee5/ejb/EJB_FAQ.html#cross-appserverremoteref),但沒有運氣whatsoever.Exceptions狀態注入失敗,並且還有CORBA壞參數(org.omg.CORBA.BAD_PARAM)... – Ilias 2011-01-21 23:37:41