001/**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.activemq.broker.region.policy;
018
019import java.util.List;
020import org.apache.activemq.broker.region.MessageReference;
021import org.apache.activemq.broker.region.Subscription;
022import org.apache.activemq.filter.MessageEvaluationContext;
023
024/**
025 * Simple dispatch policy that sends a message to every subscription that
026 * matches the message.
027 * 
028 * @org.apache.xbean.XBean
029 * 
030 */
031public class SimpleDispatchPolicy implements DispatchPolicy {
032
033    public boolean dispatch(MessageReference node, MessageEvaluationContext msgContext, List<Subscription> consumers)
034            throws Exception {
035
036        int count = 0;
037        for (Subscription sub : consumers) {
038            // Don't deliver to browsers
039            if (sub.getConsumerInfo().isBrowser()) {
040                continue;
041            }
042            // Only dispatch to interested subscriptions
043            if (!sub.matches(node, msgContext)) {
044                sub.unmatched(node);
045                continue;
046            }
047
048            sub.add(node);
049            count++;
050        }
051
052        return count > 0;
053    }
054
055}