I'm writing a web application for among things, managing the building and
deploying of applications, and I'm using Ant (1.7.0) as the engine for those
pieces. The basic flow is:
Project p = new Project();
p.init();
p.setUserProperty("ant.file", "common.xml")
ProjectHelper2 ph = new ProjectHelper2
ph.parse(p, "common.xml");
p.executeTarget("myTarget");
The common.xml file contains <taskdef> definitions for PVCS tasks I wrote to
promote, label, get, etc. Those tasks get executed in targets found in
common.xml. Those classes are in a jar file called myPVCS.jar.
During development, I executed my code from a jar file, with any supporting jar
files in my system class path (java -classpath
myApp.jar;myPVCS.jar;ant.jar;log4j.jar;mail.jar.... myApp.myClass). Everything
works fine.
I then create my war file and place all the required jar files in the
web-inf/lib folder. The application fails with a ClassNotFoundException during
the call to the ProjectHelper2 parse method. It cannot find the class defined
in my <taskdef> definition in common.xml. That class is in myPVCS.jar, which is
in the web-inf/lib folder of my war file. If I update the snippet above with
Class c = Class.forName("mypvcstask"), it finds it, so I know my war file
structure is sound.
>From looking at Ant source code, javadoc, and postings I've found, it looks
>like PropertyHelper2 uses a thread context classloader which uses the system
>classloader (the one that started my weblogic instance to which my web app is
>deployed) as a parent. As a test, I put myPVCS.jar in the weblogic classpath
>and it did find the class. Naturally, I don't want to go that route because it
>breaks the whole "fully contained application in a war file" model I'm
>shooting for.
I see references to LoaderUtils, AntClassLoader, and other things, but I can't
figure out how to use them in my case.
Since the class shown above finds classes in my web-inf/lib folder, I believe
what I want is the ability to do something like:
ProjectHelper2 ph2 = new ProjectHelper2();
ph2.setContextClassLoader(this.getClass().getClassLoader());
ph2.parse(p, "common.xml");
What can I do, or am I just trying to do something that can't be done (in an
efficient manner), and I need to rethink my approach.
Thanks,
Kevin
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