1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    * The contents of this file are subject to the terms of the Liferay Enterprise
5    * Subscription License ("License"). You may not use this file except in
6    * compliance with the License. You can obtain a copy of the License by
7    * contacting Liferay, Inc. See the License for the specific language governing
8    * permissions and limitations under the License, including but not limited to
9    * distribution rights of the Software.
10   *
11   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
12   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
13   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
14   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
15   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
16   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
17   * SOFTWARE.
18   */
19  
20  package com.liferay.portal.kernel.servlet;
21  
22  import com.liferay.portal.kernel.log.Log;
23  import com.liferay.portal.kernel.log.LogFactoryUtil;
24  
25  import java.io.Serializable;
26  
27  import javax.servlet.http.HttpSessionAttributeListener;
28  import javax.servlet.http.HttpSessionBindingEvent;
29  
30  /**
31   * <a href="SerializableSessionAttributeListener.java.html"><b><i>View Source
32   * </i></b></a>
33   *
34   * @author Bruno Farache
35   *
36   */
37  
38  public class SerializableSessionAttributeListener
39      implements HttpSessionAttributeListener {
40  
41      public void attributeAdded(HttpSessionBindingEvent event) {
42          Object obj = event.getValue();
43  
44          if (!(obj instanceof Serializable)) {
45              _log.error(
46                  obj.getClass().getName() +
47                      " is not serializable and will prevent this session from " +
48                          "being replicated");
49          }
50      }
51  
52      public void attributeRemoved(HttpSessionBindingEvent event) {
53      }
54  
55      public void attributeReplaced(HttpSessionBindingEvent event) {
56          attributeAdded(event);
57      }
58  
59      private static Log _log =
60          LogFactoryUtil.getLog(SerializableSessionAttributeListener.class);
61  
62  }