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!Steps for running Appfuse 1.8.2 under Oracle Application Server Enterprise Edition 10g Release 2 (10.1.2.0.2)

''Contributed by Stefano Bertini (stefano.bertini at plangroup.it) ''

To successfully deploy an application developed with Appfuse 1.8.2 under the Oracle AS 10g Rel.2 there are quite a number of steps to follow as Oracle AS has a lot of different (and odd) behaviours from Tomcat.

We need to modify the build.xml and some classes... \\And we need to write some new ones...

Here we go !

----

!Oracle doesn't like <dispatcher> tags in web.xml

We need edit the __properties.xml__ to add a property:\\

{{{<property name="DeployOnOrion" value="true"/>}}}

Then, we modify the __build.xml__, in the __package-web__ target so that it doesn't remove the comments from the <dispatcher> tags:

{{{

<if>

<not>

</not>

<or>

</or>

</and>

<then>

<replaceregexp flags="g"

file="${webapp.target}/WEB-INF/web.xml"

match='<!--dispatcher>'

replace='<dispatcher>'/>

<replaceregexp flags="g"

file="${webapp.target}/WEB-INF/web.xml"

match='</dispatcher-->'

replace='</dispatcher>'/>

</then>

</if>

}}}

----

!The contextConfigLocation parameter

In the __/metadata/web/web-settings.xml__ file there is the __contextConfigLocation__ parameter that looks like this:

{{{

<context-param>

<param-name>contextConfigLocation</param-name>

<param-value>

classpath*:META-INF/applicationContext-*.xml

/WEB-INF/applicationContext-*.xml

</param-value>

</context-param>

}}}

The problem with Oracle AS is that the wildcards syntax won't work. \\

And, moreover, the __classpath*:META-INF/__ search doesn't work because Oracle returns a bad URL format while browsing inside jar files.

So we have to do two different things: the first step is to modify the __build.xml__ file so that it copies the __applicationContext-hibernate.xml__ and __applicationContext-service.xml__ files in the WEB-INF directory.\\

We do this by adding the following statements at the __end__ of the __copy-resources__ target:

{{{

</copy>

</copy>

}}}

Then, we modify the __contextConfigLocation__ parameter in this way:

{{{

<context-param>

<param-name>contextConfigLocation</param-name>

<param-value>

/WEB-INF/applicationContext-hibernate.xml

/WEB-INF/applicationContext-service.xml

/WEB-INF/applicationContext-resources.xml

/WEB-INF/applicationContext-security.xml

</param-value>

</context-param>

}}}

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!Oracle calls the UserCounterListener twice

The UserCounterListener is added twice when the application is deployed because it is defined both in the __web.xml__ file and in the __/WEB-INF/<appname>.tld__ file.

This causes the application to add every user twice in the user list.

Infact, the __webdoclet__ target, in the __jsptaglip__ subtask, re-adds every listener in the taglibrary definition.

You need to modify the __webdoclet__ target in this way:

{{{

<target name="webdoclet" depends="compile-web" unless="webdoclet.unnecessary"

description="Generate web and Struts descriptors">

</classpath>

</taskdef>

<webdoclet destdir="${webapp.target}/WEB-INF"

force="${xdoclet.force}"

mergedir="metadata/web"

excludedtags="@version,@author"

verbose="true">

<deploymentdescriptor validateXML="true"

servletspec="2.3" sessiontimeout="10"

destdir="${webapp.target}/WEB-INF" distributable="false"

displayname="${ant.project.name}">

</deploymentdescriptor>

</webdoclet>

<webdoclet destdir="${webapp.target}/WEB-INF"

force="${xdoclet.force}"

mergedir="metadata/web"

excludedtags="@version,@author"

verbose="true">

<jsptaglib validateXML="true"

description="Custom tag library for this application"

shortName="${webapp.name}" filename="${webapp.name}.tld"/>

</webdoclet>

</target>

}}}

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!When invalidating a session, Oracle doesn't call any HttpSessionAttributeListener

So the UserCounterListener is never called to remove unlogged users from the User List.

To fix this behaviour I created an OrionSessionListener class that gets called when a session is invalidated and that removes every variable in the session itself, forcing every HttpSessionAttributeListener to be called from the server.

Here is the class (create it in your /src/.../webapp/listener directory):

At line 150 changed 32 lines.

package <your_package_path>.webapp.listener;

import java.util.Enumeration;

import javax.servlet.http.HttpSession;

import javax.servlet.http.HttpSessionEvent;

import javax.servlet.http.HttpSessionListener;

/**

* This listener is invoked by Orion when a session is invalidated.

* It removes every variable bound to that session forcing Orion

* to call every HttpSessionAttributeListener.

* @author <a href="mailto:stefano.bertini at plangroup.it">Stefano Bertini</a>

* @web.listener

public class OrionSessionListener implements HttpSessionListener {

public void sessionCreated(HttpSessionEvent event) {

}

public void sessionDestroyed(HttpSessionEvent event) {

HttpSession session = event.getSession();

Enumeration names = session.getAttributeNames() ;

while (names.hasMoreElements()) {

session.removeAttribute(names.nextElement().toString());

}

class MyTagLib{

def isAdmin= { attrs, body->

def user = attrs["user"]

if (user!= null && checkUserPrivs(user))

body()

}

At line 183 removed 50 lines.

----

!Null Object reference in class ConstantsTag

In the __header.jsp__ page, you get a NullPointerException when executing the line

{{{

<appfuse:constants scope="request"/>

}}}

This is caused by the __release()__ method of the __ConstantsTag__

{{{ public void release() {

super.release();

clazz = null;

scope = Constants.class.getName();

}

}}}

in the line

{{{

clazz = null;

}}}

Just comment it out and everything works again.

I tried to use the __class__ parameter of the __constants__ tag, but i got another error and i had no more time to investigate further. :-)

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!Oracle doesn't execute filters if the url doesn't contain an extension

The problem happens with the __j_security_check__ filter.

If you deploy the application, you will find out that it is impossible to login. This happens because the filter that should be triggered by the __j_security_check__ url never gets called.

I found out that the problem is because the url doesn't have an extension. I changed the __j_security_check__ into __j_security_check.login__ and everything works again.

You have to change this in the following files:\\

{{

/properties.xml \\

/metadata/web/filter-mappings.xml \\

/src/web/your_app_path/webapp/action/LoginServlet.java \\

/web/WEB-INF/applicationContext-security.xml \\

}}

----

!Strange behaviours with Orache Web Cache

Using Oracle Web Cache i noticed some strange behaviours.

OWC keeps caching pages even if the header's meta tags say not to cache anything.

I had to disable the OWC to have the application work correctly.

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