/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.deployment;
import org.jboss.mx.interceptor.AbstractInterceptor;
import org.jboss.mx.interceptor.Interceptor;
import org.jboss.mx.server.Invocation;
/**
* Base class for SubDeployer interceptors.
*
* Override one or more of the init(), create(), start(), stop(), destroy()
* methods to add behaviour. Don't forget to call invokeNext() inside
* your implementation, if you want the call to be continued.
*
* @author <a href="mailto:dimitris@jboss.org">Dimitris Andreadis</a>
* @version $Revision: 81033 $
*/
public abstract class SubDeployerInterceptor extends AbstractInterceptor
{
// Constructors --------------------------------------------------
/**
* Default CTOR
*/
public SubDeployerInterceptor()
{
super();
}
/**
* CTOR
*
* @param name - the name to use for this interceptor
*/
public SubDeployerInterceptor(String name)
{
// invoker is unknown
super(name);
}
// Interceptor implementation ------------------------------------
/**
* This invoke method checks for invocations of interest, .i.e.
* init(), create(), start(), stop(), destroy() operation calls
* with a single DeploymentInfo argument and wraps the invocation
* with calls to corresponding init(), create(), etc. methods.
*/
public Object invoke(Invocation invocation) throws Throwable
{
String type = invocation.getType();
// make sure this is an operation invocation
if (type.equals(Invocation.OP_INVOKE))
{
Object args[] = invocation.getArgs();
Object retn = invocation.getReturnTypeClass();
// make sure the signature matches -> void <methodName>(DeploymentInfo di)
if ((args.length == 1) && (args[0] instanceof DeploymentInfo) && (retn == null))
{
String method = invocation.getName();
DeploymentInfo di = (DeploymentInfo)args[0];
if (method.equals("init"))
{
return init(invocation, di);
}
else if (method.equals("create"))
{
return create(invocation, di);
}
else if (method.equals("start"))
{
return start(invocation, di);
}
else if (method.equals("stop"))
{
return stop(invocation, di);
}
else if (method.equals("destroy"))
{
return destroy(invocation, di);
}
}
}
// if we reached this point invocation is of no interest
// to SubDeployerInterceptor so simply forward it
return invokeNext(invocation);
}
// Protected -----------------------------------------------------
/**
* Use this to forward the call
*/
protected Object invokeNext(Invocation invocation) throws Throwable
{
// call the next in the interceptor chain,
// if nobody follows dispatch the call
Interceptor next = invocation.nextInterceptor();
if (next != null)
{
return next.invoke(invocation);
}
else
{
return invocation.dispatch();
}
}
// Protected overrides -------------------------------------------
// Override the following methods to add behaviour. Remember
// to call invokeNext() if you want the call to proceed.
protected Object init(Invocation invocation, DeploymentInfo di) throws Throwable
{
return invokeNext(invocation);
}
protected Object create(Invocation invocation, DeploymentInfo di) throws Throwable
{
return invokeNext(invocation);
}
protected Object start(Invocation invocation, DeploymentInfo di) throws Throwable
{
return invokeNext(invocation);
}
protected Object stop(Invocation invocation, DeploymentInfo di) throws Throwable
{
return invokeNext(invocation);
}
protected Object destroy(Invocation invocation, DeploymentInfo di) throws Throwable
{
return invokeNext(invocation);
}
}