| /** |
| * 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.Collections; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.Map; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * |
| */ |
| public class BrokerRegistry { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(BrokerRegistry.class); |
| private static final BrokerRegistry INSTANCE = new BrokerRegistry(); |
| |
| private final Object mutex = new Object(); |
| private final Map<String, BrokerService> brokers = new HashMap<String, BrokerService>(); |
| |
| public static BrokerRegistry getInstance() { |
| return INSTANCE; |
| } |
| |
| /** |
| * @param brokerName |
| * @return the BrokerService |
| */ |
| public BrokerService lookup(String brokerName) { |
| BrokerService result = null; |
| synchronized (mutex) { |
| result = brokers.get(brokerName); |
| if (result == null && brokerName != null && brokerName.equals(BrokerService.DEFAULT_BROKER_NAME)) { |
| result = findFirst(); |
| if (result != null) { |
| LOG.warn("Broker localhost not started so using " + result.getBrokerName() + " instead"); |
| } |
| } |
| } |
| return result; |
| } |
| |
| /** |
| * Returns the first registered broker found |
| * |
| * @return the first BrokerService |
| */ |
| public BrokerService findFirst() { |
| synchronized (mutex) { |
| Iterator<BrokerService> iter = brokers.values().iterator(); |
| while (iter.hasNext()) { |
| return iter.next(); |
| } |
| return null; |
| } |
| } |
| |
| /** |
| * @param brokerName |
| * @param broker |
| */ |
| public void bind(String brokerName, BrokerService broker) { |
| synchronized (mutex) { |
| brokers.put(brokerName, broker); |
| mutex.notifyAll(); |
| } |
| } |
| |
| /** |
| * @param brokerName |
| */ |
| public void unbind(String brokerName) { |
| synchronized (mutex) { |
| brokers.remove(brokerName); |
| } |
| } |
| |
| /** |
| * @return the mutex used |
| */ |
| public Object getRegistryMutext() { |
| return mutex; |
| } |
| |
| public Map<String, BrokerService> getBrokers() { |
| return Collections.unmodifiableMap(this.brokers); |
| } |
| } |