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JoeCritter
 Post subject: Hibernate Struts Problem
PostPosted: Mon Oct 20, 2003 3:17 am 
Regular
Regular

Joined: Mon Oct 20, 2003 3:14 am
Posts: 53
Location: Sterling, VA, USA
Hi folks. I'm brand new to Hibernate and Struts, so I suspect I'm biting off a little more than I can easily chew here. Any help that can be provided is appreciated.

I'm using the StrutsStudio Eclipse Plugin. For my database schema, I've generated a set of .hbm.xml files.

I've looked at the quickstart example and used it's Tomcat's server.xml additions, modifying them to talk to my (SQLServer2K) database (MS's JDBC driver and not the bridge :-). I've noticed some suggest putting the hibernate jar files in the global context, rather than the local one, but I've followed the instructions here, which say local.

I've downloaded the struts-hibernate-src example from sourceforge and used it's HibernatePlugIn class almost verbatim (essentially I changed the references to addClass() to my own classes, and that was about it). I'd like to use this one rather than the one provided on the hibernate.org web site if possible.

I've verified that my very simple struts example worked before I made the hibernate related changes.

The JSP generated code (NewUser_jsp.java) is now throwing an exception
(javax.servlet.ServletException: net/sf/hibernate/Session) to be thrown at the line indicated below, which doesn't tell my newbie self much.

Changing the database connect string doesn't change this error. I'm wondering if it's not trying to get the wrong type of Session object in this snippet.

Exception follows after the snippet.

Thoughts?

TIA

-Joe


try {
_jspxFactory = JspFactory.getDefaultFactory();
response.setContentType("text/html;charset=ISO-8859-1");
pageContext = _jspxFactory.getPageContext(this, request, response,
null, true, 8192, true);
application = pageContext.getServletContext();
config = pageContext.getServletConfig();
session = pageContext.getSession();
out = pageContext.getOut();
_jspx_out = out;

out.write("\r\n");
out.write("\r\n");
out.write("\r\n");
if (_jspx_meth_html_html_0(pageContext))
return;
} catch (Throwable t) {
out = _jspx_out;
if (out != null && out.getBufferSize() != 0)
out.clearBuffer();
if (pageContext != null) pageContext.handlePageException(t); // THROWS EXCEPTION HERE
} finally {
if (_jspxFactory != null) _jspxFactory.releasePageContext(pageContext);
}
}

Here it is. The highlighted line from the JSP snippet corresponds to line 75 in NewUser_jsp.java.

-Joe

-----------

org.apache.jasper.JasperException: net/sf/hibernate/Session
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:254)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:594)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:392)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:565)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:619)
at java.lang.Thread.run(Thread.java:536)


root cause

javax.servlet.ServletException: net/sf/hibernate/Session
at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:536)
at org.apache.jsp.NewUser_jsp._jspService(NewUser_jsp.java:75)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:137)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:210)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:594)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:392)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:565)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:619)
at java.lang.Thread.run(Thread.java:536)
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baliukas
 Post subject:
PostPosted: Mon Oct 20, 2003 4:19 am 
CGLIB Developer
CGLIB Developer

Joined: Thu Aug 28, 2003 1:44 pm
Posts: 1217
Location: Vilnius, Lithuania
Add this to JSP page:

<% try{ %>


........... HTML/JSP CODE ..........

<%

}catch(Throwable t) {

application.log(t);
throw t;
}

%>

It will help to find cause, Looks like it is "NoCalassDefFoundError"
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JoeCritter
 Post subject:
PostPosted: Tue Oct 21, 2003 3:23 am 
Regular
Regular

Joined: Mon Oct 20, 2003 3:14 am
Posts: 53
Location: Sterling, VA, USA
That snippet didn't quite work, but I did go and get log4j and turned it to debug. Thanks for the meme! :-)

Youre right. It's a ClassNotFound problem at servlet intialization time. The problem is way before I ever tried to run it. What now? Is it complaining about my (hibernate generated from hbm.xml file) class defs?

"Real" Exception follows:

-Joe


javax.servlet.ServletException: Servlet.init() for servlet action threw exception
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:963)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:823)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3420)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:3608)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1188)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:738)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1188)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:347)
at org.apache.catalina.core.StandardService.start(StandardService.java:497)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:2190)
at org.apache.catalina.startup.Catalina.start(Catalina.java:512)
at org.apache.catalina.startup.Catalina.execute(Catalina.java:400)
at org.apache.catalina.startup.Catalina.process(Catalina.java:180)
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:324)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:203)
----- Root Cause -----
java.lang.NoClassDefFoundError: net/sf/hibernate/HibernateException
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:1590)
at java.lang.Class.getConstructor0(Class.java:1762)
at java.lang.Class.newInstance0(Class.java:276)
at java.lang.Class.newInstance(Class.java:259)
at org.apache.struts.util.RequestUtils.applicationInstance(RequestUtils.java:231)
at org.apache.struts.action.ActionServlet.initModulePlugIns(ActionServlet.java:1142)
at org.apache.struts.action.ActionServlet.init(ActionServlet.java:473)
at javax.servlet.GenericServlet.init(GenericServlet.java:256)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:935)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:823)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3420)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:3608)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1188)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:738)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1188)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:347)
at org.apache.catalina.core.StandardService.start(StandardService.java:497)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:2190)
at org.apache.catalina.startup.Catalina.start(Catalina.java:512)
at org.apache.catalina.startup.Catalina.execute(Catalina.java:400)
at org.apache.catalina.startup.Catalina.process(Catalina.java:180)
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:324)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:203)
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baliukas
 Post subject:
PostPosted: Tue Oct 21, 2003 4:23 am 
CGLIB Developer
CGLIB Developer

Joined: Thu Aug 28, 2003 1:44 pm
Posts: 1217
Location: Vilnius, Lithuania
It must be something wrong in configuration, pluggin can not find hibernate.jar
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themax
 Post subject:
PostPosted: Tue Oct 21, 2003 4:36 am 
Regular
Regular

Joined: Mon Sep 08, 2003 10:05 am
Posts: 50
Location: Dublin, Ireland
What I've done in this instance is put the hibernate2.jar in the WEB-INF/lib of the EAR file, and then, in the META-INF/manifest.MF in the WAR file (contained in the EAR file), I put a reference to WEB-INF/lib/hibernate2.jar (which refers to the location in the EAR file).

My simplified META-INF/manifest.MF (from the WAR file)

Code:
Manifest-Version: 1.0
Ant-Version: Apache Ant 1.5.3
Created-By: 1.4.1_03-b02 (Sun Microsystems Inc.)
Class-Path: WEB-INF/lib WEB-INF/lib/hibernate2.jar


Note that if there are a number of jars to get referenced in there, there are rules about how long a line in the file can be, and how to break it..
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themax
 Post subject:
PostPosted: Tue Oct 21, 2003 4:47 am 
Regular
Regular

Joined: Mon Sep 08, 2003 10:05 am
Posts: 50
Location: Dublin, Ireland
U can create the manifest.mf automatically using the Jar task in Ant, and even get it to set up the Classpath reference using something like the following:

<jar destfile="${deploy.target}/${project.name.short}-ejb.jar">
<!-- Note: the generated manifest will have the classpath line wrapped to -->
<!-- not exceed 72 character lines. If this happens, the subsequent line will -->
<!-- start with a space, to indicate a continuation -->
<!-- this is as per the JAR File Specification -->
<!-- see this link for more details: -->
<!-- http://java.sun.com/j2se/1.3/docs/guide ... 20Manifest -->

<manifest>
<attribute
name="Class-Path"
value = "${runtime.classpath.list}"
/>
</manifest>

...
</jar>
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