Where to put database JAR driver

Hi everybody,

I'm using WSAS to build a web service that accesses a Postgres Database server. So far, I have been able to create a simple service following the tutorials in this site. When I modify the service to access the database, I get a "java.lang.ClassNotFoundException: org.postgresql.Driver". The driver is in the java build path, but the problem, I guess, is that is not exported to the application server for use during run time. 

I followed my previous experience with Tomcat and I clicked "Quick Fix" on the warning that Eclipse was giving in the "Problems" tab. Now, on the properties of the project, the driver is included in the "J2EE Module Dependencies". In this section is explained that "This property page lets you add a Web Library dependency to utility projects, JAR files or classpath entries. Dependencies will be resolved into the WEB-INF\lib folder of the web module at deployment time.", which sounds the way to go.

Well, after all, I still get the same exception. I tried this same driver in this same machine with the same java compiler but on top of a Tomcat server alone (using java 1.6, Tomcat 6). The WSAS is installed in standalone mode. I tried to copy and paste the driver in multiple places (including the WebContent/WEB-INF/lib inside the Eclipse project) and nothing changes.

Please help...

The whole exception goes like this:

java.lang.ClassNotFoundException: org.postgresql.Driver

    at java.net.URLClassLoader$1.run(URLClassLoader.java:200)

    at java.security.AccessController.doPrivileged(Native Method)

    at java.net.URLClassLoader.findClass(URLClassLoader.java:188)

    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)

    at java.lang.ClassLoader.loadClass(ClassLoader.java:251)

    at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)

    at java.lang.Class.forName0(Native Method)

    at java.lang.Class.forName(Class.java:169)

    at testQuery.QueryService.connect(QueryService.java:106)

    at testQuery.QueryService.IDquery(QueryService.java:18)

    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

    at java.lang.reflect.Method.invoke(Method.java:597)

    at org.apache.axis2.rpc.receivers.RPCUtil.invokeServiceClass(RPCUtil.java:194)

    at org.apache.axis2.rpc.receivers.RPCMessageReceiver.invokeBusinessLogic(RPCMessageReceiver.java:98)

    at org.apache.axis2.receivers.AbstractInOutMessageReceiver.invokeBusinessLogic(AbstractInOutMessageReceiver.java:40)

    at org.apache.axis2.receivers.AbstractMessageReceiver.receive(AbstractMessageReceiver.java:96)

    at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:148)

    at org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:275)

    at org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:121)

    at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)

    at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)

    at org.wso2.adminui.AdminUIServletFilter.doFilter(AdminUIServletFilter.java:142)

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)

    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)

    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)

    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)

    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)

    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)

    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)

    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)

    at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:667)

    at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)

    at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)

    at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)

    at java.lang.Thread.run(Thread.java:619)

java.lang.NullPointerException

    at testQuery.QueryService.DBprocessSoID(QueryService.java:45)

    at testQuery.QueryService.IDquery(QueryService.java:22)

    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

    at java.lang.reflect.Method.invoke(Method.java:597)

    at org.apache.axis2.rpc.receivers.RPCUtil.invokeServiceClass(RPCUtil.java:194)

    at org.apache.axis2.rpc.receivers.RPCMessageReceiver.invokeBusinessLogic(RPCMessageReceiver.java:98)

    at org.apache.axis2.receivers.AbstractInOutMessageReceiver.invokeBusinessLogic(AbstractInOutMessageReceiver.java:40)

    at org.apache.axis2.receivers.AbstractMessageReceiver.receive(AbstractMessageReceiver.java:96)

    at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:148)

    at org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:275)

    at org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:121)

    at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)

    at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)

    at org.wso2.adminui.AdminUIServletFilter.doFilter(AdminUIServletFilter.java:142)

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)

    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)

    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)

    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)

    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)

    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)

    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)

    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)

    at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:667)

    at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)

    at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)

    at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)

    at java.lang.Thread.run(Thread.java:619)