Two Spring webapps using shared jar

[Rapthor]

Hello,

I deployed a shared jar file on Tomcat that is to be used by two Spring webapps. The problem is the Exception I receive when trying to access the shared library by the second webapp. The first one already set some properties within the shared class instances.

The Exception:

java.lang.IllegalArgumentException: interface org.hibernate.jdbc.ConnectionWrapper is not visible from class loader 
   java.lang.reflect.Proxy.getProxyClass(Proxy.java:353) 
   java.lang.reflect.Proxy.newProxyInstance(Proxy.java:581) 
   org.hibernate.jdbc.BorrowedConnectionProxy.generateProxy(BorrowedConnectionProxy.java:67) 
   org.hibernate.jdbc.ConnectionManager.borrowConnection(ConnectionManager.java:163) 
   org.hibernate.jdbc.JDBCContext.borrowConnection(JDBCContext.java:111) 
   org.hibernate.impl.SessionImpl.connection(SessionImpl.java:359) 
   org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:456) 
   org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:349) 
   org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:259) 
   org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:102) 
   org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:161) 
   org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:203) 
   $Proxy2.create(Unknown Source) 
   test.TestController.handleRequest(TestController.java:39) 
   org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48) 
   org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:839) 
   org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:774) 
   org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:460) 
   org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:415) 
   javax.servlet.http.HttpServlet.service(HttpServlet.java:690) 
   javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

I tried to do something that seemed to be a workaround. Something to do with the ClassLoaders not being able to see each others classes?! I extended Spring's ContextListeners and replaced the original ones for startup (for both webapps):

public class MySpringContextListener extends org.spring....ContextLoaderListener {

	@Override
	public void contextInitialized(ServletContextEvent evt) {
		ClassLoader contextLoader = Thread.currentThread().getContextClassLoader(); 
		Thread.currentThread().setContextClassLoader(getClass().getClassLoader()); 
		super.contextInitialized(evt); 
		Thread.currentThread().setContextClassLoader(contextLoader);	
	}
	
	@Override
	public void contextDestroyed(ServletContextEvent evt) {
		
		ClassLoader contextLoader = Thread.currentThread().getContextClassLoader(); 
		Thread.currentThread().setContextClassLoader(getClass().getClassLoader()); 
		super.contextDestroyed(evt); 
		evt.getServletContext().removeAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE); 
		Thread.currentThread().setContextClassLoader(contextLoader);
	}
}

But still the exception remains

Can you help me, please?

[Rapthor]

No ClassLoader experts around here

[Rapthor]

Still have this problem.

May be the picture attached makes it clearer to understand the trouble I am in.

While the first webapp injects valid service classes into the shared ServiceFactory, the second webapp obtains those services (at least tries to). I get the described exception.

The services are all transactionized via:

	<!-- transaction manager -->
	<bean id="transactionManager"
		class="org.springframework.orm.hibernate3.HibernateTransactionManager">
		<property name="sessionFactory">
			<ref local="sessionFactory"/>
		</property>
	</bean>

    <bean id="domainServiceTransactionAttributeSource" class="org.springframework.transaction.interceptor.NameMatchTransactionAttributeSource">
        <property name="properties">
            <props>
                <prop key="create*">PROPAGATION_REQUIRES_NEW</prop>

                <prop key="delete*">PROPAGATION_REQUIRES_NEW</prop>

                <prop key="edit*">PROPAGATION_REQUIRES_NEW</prop>

                <prop key="find*">PROPAGATION_REQUIRES_NEW,readOnly</prop>
            </props>
        </property>
    </bean>

    <bean id="languageService" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
        <property name="proxyInterfaces">
            <list>
                <value>org.mycomp.shared.ICRUDService</value>
            </list>
        </property>

        <property name="target" ref="languageServiceTarget" />

        <property name="transactionManager" ref="transactionManager" />

        <property name="transactionAttributeSource" ref="domainServiceTransactionAttributeSource" />
    </bean>

    <bean id="languageServiceTarget" class="org.mycomp.notshared.service.LanguageServiceImpl">
    </bean>

I'd appreciate any help ...