jetty-deploy-manager/src/main/java/org/eclipse/jetty/deploy/standard/DefaultUndeployer.java

// ========================================================================
// Copyright (c) Webtide LLC
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at 
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.apache.org/licenses/LICENSE-2.0.txt
//
// You may elect to redistribute this code under either of these licenses. 
// ========================================================================
package org.eclipse.jetty.deploy.standard;

import org.eclipse.jetty.deploy.AppLifeCycle;
import org.eclipse.jetty.deploy.AppLifeCycleEvent;
import org.eclipse.jetty.deploy.DeploymentManager;
import org.eclipse.jetty.deploy.AppLifeCycle.Phase;
import org.eclipse.jetty.server.Handler;
import org.eclipse.jetty.server.handler.ContextHandler;
import org.eclipse.jetty.server.handler.ContextHandlerCollection;
import org.eclipse.jetty.server.handler.HandlerCollection;
import org.eclipse.jetty.util.log.Log;

/**
 * Default {@link AppLifeCycle.Phase#UNDEPLOY} implementation.
 */
public class DefaultUndeployer extends DefaultAppLifeCycleAdapter
{
    @Override
    public void onLifecyclePhase(AppLifeCycleEvent event) throws Exception
    {
        if (event.getLifecyclePhase() == Phase.UNDEPLOY)
        {
            DeploymentManager deployMgr = event.getDeploymentManager();
            ContextHandler handler = event.getApp().getContextHandler(deployMgr);
            ContextHandlerCollection chcoll = deployMgr.getContexts();

            recursiveRemoveContext(chcoll,handler);

            deployMgr.removeApp(event.getApp());
        }
    }

    private void recursiveRemoveContext(HandlerCollection coll, ContextHandler context)
    {
        Handler children[] = coll.getHandlers();
        int originalCount = children.length;

        for (int i = 0, n = children.length; i < n; i++)
        {
            Handler child = children[i];
            Log.info("Child handler: " + child);
            if (child.equals(context))
            {
                Log.info("Removing handler: " + child);
                coll.removeHandler(child);
                Log.info(String.format("After removal: %d (originally %d)",coll.getHandlers().length,originalCount));
            }
            else if (child instanceof HandlerCollection)
            {
                recursiveRemoveContext((HandlerCollection)child,context);
            }
        }
    }
}