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.web;
018    
019    import org.apache.activemq.broker.BrokerRegistry;
020    import org.apache.activemq.broker.BrokerService;
021    
022    /**
023     * A facade for the broker in the same JVM and ClassLoader
024     * 
025     * @version $Revision: 569067 $
026     */
027    public class SingletonBrokerFacade extends LocalBrokerFacade {
028        public SingletonBrokerFacade() {
029            super(findSingletonBroker());
030        }
031    
032        protected static BrokerService findSingletonBroker() {
033            BrokerService broker = BrokerRegistry.getInstance().findFirst();
034            if (broker == null) {
035                throw new IllegalArgumentException("No BrokerService is registered with the BrokerRegistry. Are you sure there is a configured broker in the same ClassLoader?");
036            }
037            return broker;
038        }
039    }