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    
015    package org.apache.hivemind.service.impl;
016    
017    import java.util.HashMap;
018    import java.util.Map;
019    
020    import org.apache.hivemind.service.ThreadLocalStorage;
021    
022    /**
023     * Implementation of {@link org.apache.hivemind.service.ThreadLocalStorage}.
024     * <p>
025     * Starting with release 1.2, this implementation was simplified, and its service model changed to
026     * threaded.
027     * 
028     * @author Howard Lewis Ship, Harish Krishnaswamy
029     */
030    public class ThreadLocalStorageImpl implements ThreadLocalStorage
031    {
032        // Created anew for each instance of TLS in each thread.
033    
034        private final Map _map = new HashMap();
035    
036        public Object get(String key)
037        {
038            return _map.get(key);
039        }
040    
041        public void put(String key, Object value)
042        {
043            _map.put(key, value);
044        }
045    
046        public void clear()
047        {
048            _map.clear();
049        }
050    }