Jeroen,
I would put a try catch block around the getBlogItem method:
public Iterator getBlogItem()
{
try {
Session session =
HibernateUtil.currentSession();
Transaction tx = session.beginTransaction();
Query query = session.createQuery("select b
from BlogItem as b");
blogItem = query.iterate();
tx.commit();
HibernateUtil.closeSession();
return blogItem;
}
} catch (Throwable t){
System.out.println("Error in getBlogItem: "+t);
t.printStackTrace();
throw new Error("check your logs for errors"); // so it
exits the method as it should
}
}
Regards,
Jacob
-----Original Message-----
From: Jeroen P [mailto:[EMAIL PROTECTED]
Sent: vrijdag 24 juni 2005 11:28
To: Struts-User
Subject: How to find the cause of the error
Hi,
I've got a prolbem with finding the error in my code.
I'm trying to integrate Hibernate in my application.
Tomcat gives a stack trace, but it didn't give a line
number where the error occurred. It looks like it goes
wrong with the logic:iterator in my JSP page and the
BlogItem getter in BlogBean. I'm using Netbeans 4.1 as
my IDE.
Does anybody know how I can find where it goes wrong ?
This is my JSP page:
<%@ taglib uri="/tags/struts-bean" prefix="bean" %>
<%@ taglib uri="/tags/struts-html" prefix="html" %>
<%@ taglib uri="/tags/struts-logic" prefix="logic" %>
<html:html locale="true">
<head>
<title>Blog</title>
<html:base/>
</head>
<body bgcolor="white">
<h1>Blog</h1>
<jsp:useBean id="blog" scope="request"
class="com.vortex.blog.BlogBean"/>
<logic:iterate name="blog" property="blogItem"
id="blogItem">
<bean:write name="blogItem" property="title" filter="true"/>
</logic:iterate>
</body>
</html:html>
This is the error message:
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error
() that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: Exception thrown by
getter for property blogItem of bean blog
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageCont
extImpl.java:846)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContex
tImpl.java:779)
org.apache.jsp.pages.Blog_jsp._jspService(Blog_jsp.java:153)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:99)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.ja
va:325)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:245)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFi
lter.java:362)
org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.jav
a:1063)
org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProc
essor.java:263)
org.apache.struts.action.RequestProcessor.internalModuleRelativeForward(
RequestProcessor.java:1001)
org.apache.struts.tiles.TilesRequestProcessor.internalModuleRelativeForw
ard(TilesRequestProcessor.java:345)
org.apache.struts.action.RequestProcessor.processForward(RequestProcesso
r.java:560)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:
209)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFi
lter.java:362)
root cause
javax.servlet.jsp.JspException: Exception thrown by
getter for property blogItem of bean blog
org.apache.struts.taglib.TagUtils.lookup(TagUtils.java:968)
org.apache.struts.taglib.logic.IterateTag.doStartTag(IterateTag.java:232
)
org.apache.jsp.pages.Blog_jsp._jspService(Blog_jsp.java:108)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:99)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.ja
va:325)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:245)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFi
lter.java:362)
org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.jav
a:1063)
org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProc
essor.java:263)
org.apache.struts.action.RequestProcessor.internalModuleRelativeForward(
RequestProcessor.java:1001)
org.apache.struts.tiles.TilesRequestProcessor.internalModuleRelativeForw
ard(TilesRequestProcessor.java:345)
org.apache.struts.action.RequestProcessor.processForward(RequestProcesso
r.java:560)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:
209)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFi
lter.java:362)
note The full stack trace of the root cause is
available in the Apache Tomcat/5.5.7 logs.
Apache Tomcat/5.5.7
This is my javabean BlogBean.java:
/*
* BlogAction.java
*
* Created on 23 juni 2005, 20:05
*
* To change this template, choose Tools | Options and
locate the template under
* the Source Creation and Management node.
Right-click the template and choose
* Open. You can then make changes to the template in
the Source Editor.
*/
package com.vortex.blog;
import org.apache.struts.action.Action;
import java.util.Iterator;
import org.hibernate.*;
import org.hibernate.cfg.*;
/**
*
* @author Paternotte
*/
public class BlogBean implements java.io.Serializable
{
private Iterator blogItem;
/** Creates a new instance of BlogAction */
public BlogBean() {
}
public Iterator getBlogItem()
{
Session session =
HibernateUtil.currentSession();
Transaction tx = session.beginTransaction();
Query query = session.createQuery("select b
from BlogItem as b");
blogItem = query.iterate();
tx.commit();
HibernateUtil.closeSession();
return blogItem;
}
}
HibernateUtil.java copied straight from the Hibernate documentation.
Thanks in advance,
Jeroen
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