code: /*
   * Copyright © 2014-2017 EntIT Software LLC, a Micro Focus company (L.P.)
   *
   * Licensed 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 io.cloudslang.score.events;
  
  import java.util.Map;
  import java.util.Set;
  import java.util.concurrent.ConcurrentHashMap;
  
  /**
   * User: hajyhia
   * Date: 1/19/14
   * Time: 5:51 PM
   */
  public class EventBusImpl implements EventBus {
  
  	private Map<ScoreEventListener, Set<String>> handlers = new ConcurrentHashMap<>();
  
  	public void subscribe(ScoreEventListener eventListener, Set<String> eventTypes) {
  		handlers.put(eventListener, eventTypes);
  	}
  
  	public void unsubscribe(ScoreEventListener eventListener) {
  		handlers.remove(eventListener);
  	}
  
      public void dispatch(ScoreEvent... events)  throws InterruptedException {
          for (ScoreEventListener eventHandler : handlers.keySet()) {
              Set<String> eventTypes = handlers.get(eventHandler);
              for (ScoreEvent eventWrapper : events) {
                  if (eventTypes.contains(eventWrapper.getEventType())) {
                      eventHandler.onEvent(eventWrapper);
                  }
  			}
  		}
  	}
  
  }
  