001// Copyright 2005 The Apache Software Foundation 002// 003// Licensed under the Apache License, Version 2.0 (the "License"); 004// you may not use this file except in compliance with the License. 005// You may obtain a copy of the License at 006// 007// http://www.apache.org/licenses/LICENSE-2.0 008// 009// Unless required by applicable law or agreed to in writing, software 010// distributed under the License is distributed on an "AS IS" BASIS, 011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012// See the License for the specific language governing permissions and 013// limitations under the License. 014 015package org.apache.tapestry.engine.state; 016 017import java.util.HashMap; 018import java.util.Map; 019 020/** 021 * The application scope is for objects that are global to all users and all sessions. 022 * Traditionally, that's stored in the servlet context, but there's no advantage to doing that over 023 * just using a Map. 024 * 025 * @author Howard M. Lewis Ship 026 * @since 4.0 027 */ 028public class ApplicationScopeManager implements StateObjectPersistenceManager 029{ 030 private Map _objects = new HashMap(); 031 032 public synchronized boolean exists(String objectName) 033 { 034 return false; 035 } 036 037 public synchronized Object get(String objectName, StateObjectFactory factory) 038 { 039 Object result = _objects.get(objectName); 040 041 if (result == null) 042 { 043 result = factory.createStateObject(); 044 _objects.put(objectName, result); 045 } 046 047 return result; 048 } 049 050 public synchronized void store(String objectName, Object stateObject) 051 { 052 _objects.put(objectName, stateObject); 053 } 054 055}