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     */
017    package org.apache.activemq.broker.region.policy;
018    
019    import org.apache.activemq.broker.region.MessageReference;
020    import org.apache.activemq.broker.region.Subscription;
021    import org.apache.activemq.command.ActiveMQDestination;
022    import org.apache.activemq.filter.MessageEvaluationContext;
023    import org.apache.activemq.filter.NonCachedMessageEvaluationContext;
024    
025    /**
026     * Simple dispatch policy that determines if a message can be sent to a subscription
027     *
028     * @org.apache.xbean.XBean
029     * 
030     */
031    public class SimpleDispatchSelector implements DispatchSelector {
032    
033        private final ActiveMQDestination destination;
034    
035        /**
036         * @param destination
037         */
038        public SimpleDispatchSelector(ActiveMQDestination destination) {
039            this.destination = destination;
040        }
041    
042        public boolean canDispatch(Subscription subscription, MessageReference node) throws Exception {
043            MessageEvaluationContext msgContext = new NonCachedMessageEvaluationContext();
044            msgContext.setDestination(this.destination);
045            msgContext.setMessageReference(node);
046            return subscription.matches(node, msgContext);
047        }
048    }