org.apache.activemq.broker.MutableBrokerFilter Maven / Gradle / Ivy
/**
* 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.activemq.broker;
import java.util.concurrent.atomic.AtomicReference;
/**
* Like a BrokerFilter but it allows you to switch the getNext().broker. This
* has more overhead than a BrokerFilter since access to the getNext().broker
* has to synchronized since it is mutable
*
*
*/
public class MutableBrokerFilter extends BrokerFilter {
protected AtomicReference next = new AtomicReference();
public MutableBrokerFilter(Broker next) {
super(null); // prevent future code from using the inherited 'next'
this.next.set(next);
}
@Override
public Broker getAdaptor(Class type) {
if (type.isInstance(this)) {
return this;
}
return next.get().getAdaptor(type);
}
public Broker getNext() {
return next.get();
}
public void setNext(Broker next) {
this.next.set(next);
}
}