问题
I am using JBoss 4.2.2.GA app server in a development environment. I have a WAR file, MyWar.war, and a JAR file ExternalJar.jar. These files are structured in the following way:
Application WAR file:
MyWar.war
|
|--- AppClass1.class
|
|--- AppClass2.class
External jar file (provided by client):
ExternalJar.jar
|
|--- ExternalClass.class
ExternalClass needs to use AppClass1 and AppClass2 needs to use ExternalClass. When I deploy the WAR in JBoss and put JAR in JBoss' class path, I get a LinkageError on instantiating ExternalClass when I run the app. It seems as though the WAR sees the ExternalClass, but ExternalClass cannot access classes within the WAR.
If I manually put ExternalJar in the WAR file (WEB-INF/lib), it works fine. But we'd rather not modify archive files to maintain consistency with our production deployments.
Is there any configuration or setting in JBoss that allows for a shared library folder that will be included in the class path for the app?
回答1:
You can disable WAR file class loader isolation by doing the following:
Open this file
%JBOSS_HOME%\server\<serverName>\deploy\jboss-web.deployer\META-INF\jboss-service.xml
Set this attribute to true:
<attribute name="UseJBossWebLoader">true</attribute>
You should be able to put your extension JAR file in the deploy/ directory with your WAR file.
This setting could cause issues if you're loading multiple WAR files with the same libraries, so YMMV.
回答2:
You can deploy a jar file just like you deploy the war. Since JBoss use a shared class loader, your jar will be able to access the classes loaded from the war.
来源：https://stackoverflow.com/questions/1842635/in-jboss-can-i-configure-a-shared-library-location