My setup: Mac OS X 10.5.8, Tomcat/6.0.20[from apache], java version
"1.6.0_15"
I'm starting Tomcat with ~bin/startup.sh.
I have a SessionListener which is not being invoked when I connect to
the webapp,
and I don't understand why.
The SessionListener works correctly in a a slight variation of the
circumstances.
The problem circumstance is when the app is running as the default
ROOT webapp,
by dropping ROOT.war into webapps.
The relevant part of web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd";>
<!-- ============================================ Welcome File List -->
<welcome-file-list>
<welcome-file>pages/welcome.jsp</welcome-file>
</welcome-file-list>
<!-- ============================================ Listener
Registration -->
<listener>
<listener-class>com.strongbrain.listener.AppListener</listener-
class>
</listener>
<listener>
<listener-class>com.strongbrain.listener.SessionListener</
listener-class>
</listener>
<!-- ============================================ Context Parameters -->
<context-param>
<param-name>baseprefix</param-name>
<param-value>/</param-value>
</context-param>
.........etc........
The SessionListener class:
package com.strongbrain.listener;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpSessionEvent;
import javax.servlet.http.HttpSessionListener;
import com.strongbrain.ConfigBean;
import com.strongbrain.Constants;
public class SessionListener implements HttpSessionListener
{
public void sessionCreated(HttpSessionEvent httpSessionEvent) {
System.out.println("++++Enter sessionCreated");
HttpSession session = httpSessionEvent.getSession();
ConfigBean configBean = new ConfigBean();
String baseprefix =
httpSessionEvent
.getSession
().getServletContext().getInitParameter(Constants.BASEPREFIX);
if (baseprefix != null){
configBean.setBaseprefix(baseprefix);
}
System.out.println("+++++++++SessionListener: isNew="+session.isNew()
+" baseprefix="+baseprefix+"
configBean.bp="+configBean.getBaseprefix());
session.setAttribute(Constants.CONFIG_BEAN, configBean);
}
public void sessionDestroyed(HttpSessionEvent arg0) {
}
}
When I start Tomcat with the app (as ROOT.war) in webapps, and then
connect with a browser,
catalina.out looks like this:
.....(usual stuff)
Dec 1, 2009 12:14:42 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 2823 ms
[Deprecated] Xalan:
org.apache.xalan.processor.TransformerFactoryImpl <<<<< Browser
connect above here
adl=5 <<<<< Healthy
trace output from class invoked on welcome.jsp
Notice that neither of the System.out.println's in the
SessionListener.sessionCreated method appear.
BUT: When I run this in the non-ROOT configuration, things work. In
that case, the only difference in the code above is in
web.xml:
<context-param>
<param-name>baseprefix</param-name>
<param-value>/strongbrain/</param-value>
</context-param>
In that case, catalina.out shows:
Dec 1, 2009 12:30:34 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 3072 ms
++++Enter sessionCreated
+++++++++SessionListener: isNew=true baseprefix=/strongbrain/
configBean.bp=/strongbrain/
[Deprecated] Xalan: org.apache.xalan.processor.TransformerFactoryImpl
adl=5
This behavior is occurring both on my (development) Mac,
and on a remote CentOS 5 system running Tomcat/6.0.18 under java
version "1.6.0_12"
In all cases, the browser connects to the expected welcome page.
At present, I'm at a loss as to what to look for; I hope someone here
can point me in the right direction.
Thanks in advance,
Ken Bowen
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