java.lang.NoClassDefFoundError: Could not initialize class com.server.HibernateSessionFactory
fomba collins
Hi,
I have a class (Connection) on the server side that accesses the database through hibernate. The connection on the server side is perfect. I want to use RPC to call these methods on the client side. I then create an Implementation class (ConnectionImpl) on the server that calls one of the methods of the Connection class.ie the method connecto. Here is the Implementation class.
public class ConnectionImpl extends RemoteServiceServlet implementsConnectionService{ /** * */ private static final long serialVersionUID = 1L; Connection con = new Connection(); /*The class that performs database access through hibernate*/ public boolean connecto(String login, String password)throws IllegalArgumentException{
return con.connect(login, password);//connect() returns a boolean }
}
Then on the client side, I have the ConnectionService and ConnectionServiceAsync interfaces:
public interface ConnectionService extends RemoteService {
boolean connecto(String login, String password)throws IllegalArgumentException; } and
public interface ConnectionServiceAsync {
void connecto(String login, String password, AsyncCallback<Boolean> callback) throws IllegalArgumentException; }
The web.xml conf file is as follows:
<? xml version="1.0" encoding="UTF-8"?><! DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">
<
<!-- Servlets --> <servlet> <servlet-name>connectionServlet</servlet-name> <servlet-class>com.server.ConnectionServiceImpl</servlet-class> </servlet>
<servlet-mapping> <servlet-name>connectionServlet</servlet-name> <url-pattern>/webtop/connection</url-pattern> </servlet-mapping>
<!-- Default page to serve --> <welcome-file-list> <welcome-file>Webtop.html</welcome-file> </welcome-file-list>
</
But when I run and enter values to execute through rpc, I get the following error:
SEVERE: [1273482832366000] javax.servlet.ServletContext log: Exception while dispatching incoming RPC call com.google.gwt.user.server.rpc.UnexpectedException at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure( at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse( at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall( at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost( at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost( at javax.servlet.http.HttpServlet.service( at javax.servlet.http.HttpServlet.service( at org.mortbay.jetty.servlet.ServletHolder.handle( at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter( at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter( at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter( at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter( at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter( at com.google.appengine.tools.development.StaticFileFilter.doFilter( at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter( at org.mortbay.jetty.servlet.ServletHandler.handle( at org.mortbay.jetty.security.SecurityHandler.handle( at org.mortbay.jetty.servlet.SessionHandler.handle( at org.mortbay.jetty.handler.ContextHandler.handle( at org.mortbay.jetty.webapp.WebAppContext.handle( at com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle( at org.mortbay.jetty.handler.HandlerWrapper.handle( at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle( at org.mortbay.jetty.handler.HandlerWrapper.handle( at org.mortbay.jetty.Server.handle( at org.mortbay.jetty.HttpConnection.handleRequest( at org.mortbay.jetty.HttpConnection$RequestHandler.content( at org.mortbay.jetty.HttpParser.parseNext( at org.mortbay.jetty.HttpParser.parseAvailable( at org.mortbay.jetty.HttpConnection.handle( at org.mortbay.io.nio.SelectChannelEndPoint.run( at org.mortbay.thread.QueuedThreadPool$PoolThread.run( Caused by: java.lang.NoClassDefFoundError: Could not initialize class com.extjs.gxt.samples.desktop.server.HibernateSessionFactory
at com.extjs.gxt.samples.desktop.server.BaseHibernateDAO.getSession( at com.extjs.gxt.samples.desktop.server.EvutiDAO.findAll( EvutiDAO.java:104)at com.extjs.gxt.samples.desktop.server.Connection.getLogin( Connection.java:42)at com.extjs.gxt.samples.desktop.server.Connection.connect( Connection.java:69)at com.extjs.gxt.samples.desktop.server.ConnectionServiceImpl.connecto( ConnectionServiceImpl.java:16)at sun.reflect.NativeMethodAccessorImpl.invoke0( Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse( RPC.java:562)... 30 more
Remote Procedure Call - Failure
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--Sri