| /** |
| * 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.superbiz.stateless.basic; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| public class ExecutionChannel { |
| |
| private static final ExecutionChannel INSTANCE = new ExecutionChannel(); |
| |
| private final List<ExecutionObserver> observers = new ArrayList<ExecutionObserver>(); |
| |
| public static ExecutionChannel getInstance() { |
| return INSTANCE; |
| } |
| |
| public void addObserver(ExecutionObserver observer) { |
| this.observers.add(observer); |
| } |
| |
| public void notifyObservers(Object value) { |
| for (ExecutionObserver observer : this.observers) { |
| observer.onExecution(value); |
| } |
| } |
| } |