01 /*
02 *
03 * Licensed to the Apache Software Foundation (ASF) under one
04 * or more contributor license agreements. See the NOTICE file
05 * distributed with this work for additional information
06 * regarding copyright ownership. The ASF licenses this file
07 * to you under the Apache License, Version 2.0 (the
08 * "License"); you may not use this file except in compliance
09 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 *
20 */
21 package org.apache.qpid.management.wsdm.common;
22
23 /**
24 * Thread session manager used to handle thread-scoped sessions.
25 *
26 * @author Andrea Gazzarini
27 */
28 public final class ThreadSessionManager
29 {
30 private static ThreadSessionManager instance = new ThreadSessionManager();
31
32 private ThreadLocal<ThreadSession> sessions;
33
34 /**
35 * Builds and initializes a new manager.
36 */
37 private ThreadSessionManager()
38 {
39 this.sessions = new ThreadLocal<ThreadSession>();
40 }
41
42 /**
43 * Returns the singleton instance of this manager.
44 *
45 * @return the singleton instance of this manager.
46 */
47 public static ThreadSessionManager getInstance()
48 {
49 return instance;
50 }
51
52 /**
53 * Returns (or create and returns) the session associated with the
54 * current thread.
55 *
56 * @return the thread session.
57 */
58 public ThreadSession getSession()
59 {
60 ThreadSession session = (ThreadSession) sessions.get();
61 if (session == null)
62 {
63 session = new ThreadSession();
64 sessions.set(session);
65 }
66 return session;
67 }
68 }
|