| /* |
| * 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.qpid.server.store; |
| |
| import java.util.ArrayList; |
| import java.util.EnumMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class EventManager |
| { |
| private Map<Event, List<EventListener>> _listeners = new EnumMap<Event, List<EventListener>> (Event.class); |
| private static final Logger LOGGER = LoggerFactory.getLogger(EventManager.class); |
| |
| public synchronized void addEventListener(EventListener listener, Event... events) |
| { |
| for(Event event : events) |
| { |
| List<EventListener> list = _listeners.get(event); |
| if(list == null) |
| { |
| list = new ArrayList<EventListener>(); |
| _listeners.put(event,list); |
| } |
| list.add(listener); |
| } |
| } |
| |
| public synchronized void notifyEvent(Event event) |
| { |
| if (_listeners.containsKey(event)) |
| { |
| if(LOGGER.isDebugEnabled()) |
| { |
| LOGGER.debug("Received event " + event); |
| } |
| |
| for (EventListener listener : _listeners.get(event)) |
| { |
| listener.event(event); |
| } |
| } |
| } |
| |
| public synchronized boolean hasListeners(Event event) |
| { |
| return _listeners.containsKey(event); |
| } |
| } |