001// Copyright 2004, 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.services;
016
017
018/**
019 * An pool for objects.  Objects may be stored in a Pool for later reuse.
020 *
021 * @author Howard Lewis Ship
022 * @since 4.0
023 */
024public interface ObjectPool
025{
026        /**
027         * Returns an object from the pool, previously stored with the given key. May
028         * return null if no such object exists.
029         */
030        Object get(Object key);
031        
032        /**
033         * Stores an object into the pool for later retrieval with the provided key.
034         */
035        
036        void store(Object key, Object value);
037}