/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.brooklyn.util.web;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import org.eclipse.jetty.server.Handler;
import org.eclipse.jetty.server.handler.ContextHandlerCollection;
import org.eclipse.jetty.webapp.WebAppContext;
public class ContextHandlerCollectionHotSwappable extends ContextHandlerCollection {
public synchronized void updateHandler(WebAppContext context) throws Exception {
Handler[] hl0 = getHandlers();
List<Handler> hl = hl0!=null ? new ArrayList<Handler>(Arrays.asList(hl0)) : new ArrayList<Handler>();
// remove any previous version
removeContextFromList(hl, context.getContextPath());
// have to add before the root war (remove root war then add back)
Handler oldRoot = removeContextFromList(hl, "/");
// now add and add back any root
hl.add(context);
if (oldRoot!=null) hl.add(oldRoot);
setHandlers(hl.toArray(new Handler[0]));
// and if we are already running, start the new context
if (isRunning()) {
context.start();
}
}
public static Handler removeContextFromList(List<Handler> hl, String contextPath) {
Iterator<Handler> hi = hl.iterator();
while (hi.hasNext()) {
Handler h = hi.next();
if ((h instanceof WebAppContext) && ((WebAppContext)h).getContextPath().equals(contextPath)) {
hi.remove();
return h;
}
}
return null;
}
}