Hi Jim/all I have solved my problem
I have used c3p0 and its basic configuration, to do its work for me. To use c3p0, I have configured my hibernate.cfg.xml file, hibernate.properties file, Tomcat Context.xml file and add the c3p0.jar file to my CLASSPATH that can be downloaded either from http://sourceforge.net/projects/c3p0 or it also comes along with Hibernate distribution. The documentation comes along with the bundle of c3p0 and the hibernate documentation helped me a lot to place all things in place: Regards Raul On May 15, 8:38 pm, Jim <jim.p...@gmail.com> wrote: > You have to explicitly throw any exceptions in all service methods. > > Jimhttp://www.gwtorm.comFor GWT > ORMhttp://code.google.com/p/dreamsource-orm/downloads/list > > On May 15, 9:52 am, Raul <raahoo...@gmail.com> wrote: > > > Hello all, > > > At present I am trying to integrate GWTHibernateand MySQL in > > Tomcat5. I am usingHibernateto access my database in a servlet as > > > public class DBConnectionImpl extends RemoteServiceServlet implements > > DBConnection { > > private Session session; > > > public DBConnectionImpl() { > > try { > > session = > > HibernateUtil.getSessionFactory().openSession(); > > } catch (Exception ex) { > > ex.printStackTrace(); > > } > > } > > > } > > > I have configured all the necessaryHibernaterequirements like > > hybernate.cfg.xml, web.xml, context.xml and all necessary java > > classes. > > > But when I want to connect with my database through a rpc call it > > shows me error like: > > > May 15, 2009 7:00:44 PM org.apache.catalina.core.ApplicationContext > > log > > SEVERE: Exception while dispatching incoming RPC call > > com.google.gwt.user.server.rpc.UnexpectedException: Service method > > 'public abstract com.duke.irb.client.data.User > > com.duke.irb.client.dao.DBConnection.authenticateUser > > (java.lang.String,java.lang.String)' threw an unexpected exception: > > java.lang.UnsupportedOperationException: Not supported by > > BasicDataSource > > at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure > > (RPC.java:360) > > at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse > > (RPC.java:546) > > at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall > > (RemoteServiceServlet.java:166) > > at com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost > > (RemoteServiceServlet.java:86) > > at javax.servlet.http.HttpServlet.service(HttpServlet.java:710) > > at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) > > at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter > > (ApplicationFilterChain.java:269) > > at org.apache.catalina.core.ApplicationFilterChain.doFilter > > (ApplicationFilterChain.java:188) > > at org.apache.catalina.core.StandardWrapperValve.invoke > > (StandardWrapperValve.java:213) > > at org.apache.catalina.core.StandardContextValve.invoke > > (StandardContextValve.java:174) > > at org.apache.catalina.core.StandardHostValve.invoke > > (StandardHostValve.java:127) > > at org.apache.catalina.valves.ErrorReportValve.invoke > > (ErrorReportValve.java:117) > > at org.apache.catalina.core.StandardEngineValve.invoke > > (StandardEngineValve.java:108) > > at org.apache.catalina.connector.CoyoteAdapter.service > > (CoyoteAdapter.java:174) > > at org.apache.coyote.http11.Http11Processor.process > > (Http11Processor.java:874) > > at org.apache.coyote.http11.Http11BaseProtocol > > $Http11ConnectionHandler.processConnection(Http11BaseProtocol.java: > > 665) > > at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket > > (PoolTcpEndpoint.java:528) > > at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt > > (LeaderFollowerWorkerThread.java:81) > > at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run > > (ThreadPool.java:689) > > at java.lang.Thread.run(Unknown Source) > > Caused by: java.lang.UnsupportedOperationException: Not supported by > > BasicDataSource > > at org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection > > (BasicDataSource.java:899) > > at > > org.hibernate.connection.DatasourceConnectionProvider.getConnection > > (DatasourceConnectionProvider.java:89) > > at org.hibernate.jdbc.ConnectionManager.openConnection > > (ConnectionManager.java:446) > > at org.hibernate.jdbc.ConnectionManager.getConnection > > (ConnectionManager.java:167) > > at org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:142) > > at org.hibernate.transaction.JDBCTransaction.begin > > (JDBCTransaction.java:85) > > at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java: > > 1353) > > at com.duke.irb.server.DBConnectionImpl.authenticateUser > > (DBConnectionImpl.java:30) > > 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:527) > > ... 18 more > > > Please help me out in solving this issue. > > > I will provide more information further if needed. > > > I am new to both GWT andHibernate... :-) > > > Thanks in advance > > Raul --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. 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