有一个麻烦的问题,我找不到任何统一的方法来解决它在互联网上。我正在开发一个使用Java EE,Glassfish和Netbeans的企业应用程序。从另一个Glassfish实例访问一个无状态的EJB
我有两个Glassfish设置的实例,我正在构建一个企业应用程序拆分这两个实例。我有一个网页(有几个JSP和几个HttpServlet)在一个Glassfish实例上运行。另一方面,我想实现应用程序的业务逻辑。也就是说,我有一些Java Entity Beans,并且还有一个使用这些实体bean的远程接口的EJB。
我的目标是能够从glassfish的第一个实例的servlet远程访问EJB。我遵循了this post中的说明,但未成功。我提供的代码片段,以获得更具体的...
在Glassfish,EJB远程接口的一个实例:
@Remote
public interface MyEjbRemote {
//...
}
和无状态的bean:
@Stateless(name="ejb/MyEjb")
public class MyEjb implements MyEjbRemote {
//...
}
在其他实例:
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,当我启动我的网站,并尝试查找远程ej b我收到以下例外情况:
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)
我的实现中缺少什么?任何建议/想法?请询问我的问题描述是否有遗漏,这是我第一次在本网站上发布。我感谢你的时间!
Ilias
我已经改变了我的实现,按照指示[这里](http://glassfish.java.net/javaee5/ejb/EJB_FAQ.html#cross-appserverremoteref),但没有运气whatsoever.Exceptions状态注入失败,并且还有CORBA坏参数(org.omg.CORBA.BAD_PARAM)... – Ilias 2011-01-21 23:37:41