Problem with EJB client program
Denero
I have the following java program which can run as an application or can be deployed
as a servlet. The program invokes the findByPrimaryKey methos on a home interface
to obtain the remote interface.
On the both the modes(servlet vs application) the program fails with the exception
listed below. Everything works fine if I remove the line System.setSecurityManager(new
RMISecurityManager()); in the java code. But in the production scenario the same
application also acts as an RMI client so this statement is required. Can someone
help me fix these errors(atleast as a servlet).
Thanks in advance,
DW
SOURCE
=======
package support;
import javax.naming.Context;
import javax.naming.directory.DirContext;
import javax.naming.directory.InitialDirContext;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Hashtable;
import java.lang.reflect.Method;
import java.rmi.RMISecurityManager;
import java.io.PrintWriter;
import java.io.IOException;
public class EJBClient extends HttpServlet {
public static void main(String[] args) {
System.out.println("Started Exceution ....");
try {
System.setSecurityManager(new RMISecurityManager());
System.out.println("Security Manger is: "+System.getSecurityManager());
Hashtable env = new Hashtable(11);
env.put(Context.INITIAL_CONTEXT_FACTORY, "weblogic.jndi.WLInitialContextFactory");
env.put(Context.PROVIDER_URL, "t3://localhost");
DirContext ctx = new InitialDirContext(env);
Object oHomeInterface = ctx.lookup("bookstore.book");
Class[] paramClasses = new Class[] {String.class};
Method oFindByPk = oHomeInterface.getClass().getMethod(
"findByPrimaryKey", paramClasses);
String[] paramValues = {"1001"};
Object oRemoteInterface = oFindByPk.invoke(oHomeInterface , paramValues);
System.out.println("oRemoteInterface: "+oRemoteInterface);
} catch(Exception exce) {
System.out.println("ERR_MAIN: ");
exce.printStackTrace();
}
System.out.println("Exceution over.");
}
public void doGet(HttpServletRequest req, HttpServletResponse resp) throws
IOException {
main(null);
PrintWriter pw = resp.getWriter();
pw.println("<h1>Success</h1>");
}
}
ERROR WHILE RUNNING AS A SERVLET
===========================
java.lang.reflect.InvocationTargetException: java.rmi.UnmarshalException: cannot
unmarshaling return; nested exception is:
java.rmi.UnexpectedException: Failed to parse descriptor file; nested exception
is:
org.xml.sax.SAXException: ResourceEntityResolver: did not resolve entity for
publicId = -//BEA Systems, Inc.//RMI Runtime DTD 1.0//EN with resource name rmi.dtd
java.rmi.UnexpectedException: Failed to parse descriptor file; nested exception
is:
org.xml.sax.SAXException: ResourceEntityResolver: did not resolve entity for
publicId = -//BEA Systems, Inc.//RMI Runtime DTD 1.0//EN with resource name rmi.dtd
org.xml.sax.SAXException: ResourceEntityResolver: did not resolve entity for publicId
= -//BEA Systems, Inc.//RMI Runtime DTD 1.0//EN with resource name rmi.dtd
at weblogic.xml.dom.ResourceEntityResolver.resolveEntity(ResourceEntityResolver.java:99)
at weblogic.rmi.internal.RMIEntityResolver.resolveEntity(RMIEntityResolver.java:43)
at weblogic.xml.jaxp.ChainingEntityResolver.resolveEntity(ChainingEntityResolver.java:85)
at weblogic.apache.xerces.readers.DefaultEntityHandler.startReadingFromExternalEntity(DefaultEntityHandler.java:768)
at weblogic.apache.xerces.readers.DefaultEntityHandler.startReadingFromExternalSubset(DefaultEntityHandler.java:583)
at weblogic.apache.xerces.framework.XMLDTDScanner.scanDoctypeDecl(XMLDTDScanner.java:1161)
at weblogic.apache.xerces.framework.XMLDocumentScanner.scanDoctypeDecl(XMLDocumentScanner.java:2189)
at weblogic.apache.xerces.framework.XMLDocumentScanner.access$0(XMLDocumentScanner.java:2143)
at weblogic.apache.xerces.framework.XMLDocumentScanner$PrologDispatcher.dispatch(XMLDocumentScanner.java:856)
at weblogic.apache.xerces.framework.XMLDocumentScanner.parseSome(XMLDocumentScanner.java:399)
at weblogic.apache.xerces.framework.XMLParser.parse(XMLParser.java:1147)
at org.xml.sax.helpers.XMLReaderAdapter.parse(XMLReaderAdapter.java:223)
at weblogic.xml.jaxp.WebLogicParser.parse(WebLogicParser.java:67)
at weblogic.rmi.internal.DescriptorManager.getDescriptorParser(DescriptorManager.java:100)
at weblogic.rmi.internal.DescriptorManager.getBasicRuntimeDescriptor(DescriptorManager.java:63)
at weblogic.rmi.internal.DescriptorManager.getDescriptor(DescriptorManager.java:48)
at weblogic.rmi.internal.DescriptorManager.getDescriptor(DescriptorManager.java:37)
at weblogic.rmi.internal.OIDManager.makeActivatableServerReference(OIDManager.java:204)
at weblogic.rmi.internal.OIDManager.getReplacement(OIDManager.java:138)
at weblogic.common.internal.RemoteObjectReplacer.getReplacement(RemoteObjectReplacer.java:288)
at weblogic.common.internal.RemoteObjectReplacer.replaceObject(RemoteObjectReplacer.java:107)
at weblogic.common.internal.WLObjectOutputStreamBase2.replaceObject(WLObjectOutputStreamBase2.java:44)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:318)
at weblogic.rmi.internal.CBVOutputStream.writeObject(CBVOutputStream.java:78)
at weblogic.rmi.internal.ServerRequest.unmarshalReturn(ServerRequest.java:87)
at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:264)
at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:230)
at ejbcategory.samples.store.BookBean_y7odp5_HomeImpl_WLStub.findByPrimaryKey(Unknown
Source)
at java.lang.reflect.Method.invoke(Native Method)
at support.EJBClient.main(EJBClient.java:46)
at support.EJBClient.doGet(EJBClient.java:56)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:1075)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:418)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:306)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:5517)
at weblogic.security.service.SecurityServiceManager.runAs(SecurityServiceManager.java:685)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3156)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2506)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:234)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:210)
ERROR WHILE RUNNING AS AN APPLICATION
===============================
weblogic.common.internal.VersioningError: No WebLogic packages defined in CLASSP
ATH
at weblogic.common.internal.VersionInfo.<init>(VersionInfo.java:41)
at weblogic.common.internal.VersionInfo.initialize(VersionInfo.java:86)
at weblogic.kernel.Kernel.initialize(Kernel.java:156)
at weblogic.kernel.Kernel.ensureInitialized(Kernel.java:133)
at weblogic.rmi.internal.ClientRuntimeDescriptor.<clinit>(ClientRuntimeD
escriptor.java:54)
at weblogic.jndi.WLInitialContextFactoryDelegate.<clinit>(WLInitialConte
xtFactoryDelegate.java:164)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:115)
at weblogic.jndi.WLInitialContextFactory.getInitialContext(WLInitialCont
extFactory.java:145)
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:6
60)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:241
)
at javax.naming.InitialContext.init(InitialContext.java:217)
at javax.naming.InitialContext.<init>(InitialContext.java:193)
at javax.naming.directory.InitialDirContext.<init>(InitialDirContext.jav
a:78)
at support.EJBClient.main(EJBClient.java:35)
Exception in thread "main" java.lang.InternalError: error initializing kernel
at weblogic.kernel.Kernel.ensureInitialized(Kernel.java:136)
at weblogic.rmi.internal.ClientRuntimeDescriptor.<clinit>(ClientRuntimeD
escriptor.java:54)
at weblogic.jndi.WLInitialContextFactoryDelegate.<clinit>(WLInitialConte
xtFactoryDelegate.java:164)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:115)
at weblogic.jndi.WLInitialContextFactory.getInitialContext(WLInitialCont
extFactory.java:145)
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:6
60)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:241
)
at javax.naming.InitialContext.init(InitialContext.java:217)
at javax.naming.InitialContext.<init>(InitialContext.java:193)
at javax.naming.directory.InitialDirContext.<init>(InitialDirContext.jav
a:78)
at support.EJBClient.main(EJBClient.java:35)