/**
* 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.region.policy;
import java.util.List;
import org.apache.activemq.broker.region.MessageReference;
import org.apache.activemq.broker.region.Subscription;
import org.apache.activemq.filter.MessageEvaluationContext;
/**
* Abstraction to allow different dispatching policies to be plugged
* into the topic region implementations. This is used by a topic to deliver
* messages to the matching subscriptions.
*
*
*/
public interface DispatchPolicy {
/**
* Decides how to dispatch a selected message to a collection of consumers. A safe
* approach is to dispatch to every subscription that matches.
*
* The list will be safe to iterate over when this method is called
*
* @return true if at least one consumer was dispatched or false if there are no active subscriptions that could be dispatched
*/
boolean dispatch(MessageReference node, MessageEvaluationContext msgContext, List<Subscription> consumers) throws Exception;
}