1 /* Copyright 2004, 2005, 2006 Acegi Technology Pty Limited
2 *
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 package org.springframework.security.context;
17
18 import org.springframework.util.Assert;
19
20
21 /**
22 * An <code>InheritableThreadLocal</code>-based implementation of {@link
23 * org.springframework.security.context.SecurityContextHolderStrategy}.
24 *
25 * @author Ben Alex
26 * @version $Id: InheritableThreadLocalSecurityContextHolderStrategy.java 2217 2007-10-27 00:45:30Z luke_t $
27 *
28 * @see java.lang.ThreadLocal
29 * @see org.springframework.security.context.HttpSessionContextIntegrationFilter
30 */
31 public class InheritableThreadLocalSecurityContextHolderStrategy implements SecurityContextHolderStrategy {
32 //~ Static fields/initializers =====================================================================================
33
34 private static ThreadLocal contextHolder = new InheritableThreadLocal();
35
36 //~ Methods ========================================================================================================
37
38 public void clearContext() {
39 contextHolder.set(null);
40 }
41
42 public SecurityContext getContext() {
43 if (contextHolder.get() == null) {
44 contextHolder.set(new SecurityContextImpl());
45 }
46
47 return (SecurityContext) contextHolder.get();
48 }
49
50 public void setContext(SecurityContext context) {
51 Assert.notNull(context, "Only non-null SecurityContext instances are permitted");
52 contextHolder.set(context);
53 }
54 }