1 /*
2 * Licensed under the Apache License, Version 2.0 (the "License");
3 * you may not use this file except in compliance with the License.
4 * You may obtain a copy of the License at
5 *
6 * http://www.apache.org/licenses/LICENSE-2.0
7 *
8 * Unless required by applicable law or agreed to in writing, software
9 * distributed under the License is distributed on an "AS IS" BASIS,
10 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11 * See the License for the specific language governing permissions and
12 * limitations under the License.
13 *
14 */
15
16 package org.esigate.servlet.impl;
17
18 import java.io.Serializable;
19
20 import javax.servlet.http.HttpServletRequest;
21 import javax.servlet.http.HttpSession;
22
23 import org.esigate.api.Session;
24
25 /**
26 * Encapsulates servlet containes HttpSession mechanism.
27 *
28 * @author Francois-Xavier Bonnet
29 *
30 */
31 public class HttpServletSession implements Session {
32
33 private final HttpServletRequest request;
34
35 public HttpServletSession(HttpServletRequest request) {
36 this.request = request;
37 }
38
39 @Override
40 public void setAttribute(String key, Serializable value) {
41 HttpSession session = this.request.getSession();
42 // Session may be null on some servlet engines if the response has been sent already. This may happen for
43 // background revalidations.
44 if (session != null) {
45 session.setAttribute(key, value);
46 }
47 }
48
49 @Override
50 public Serializable getAttribute(String key) {
51 HttpSession session = this.request.getSession(false);
52 if (session == null) {
53 return null;
54 }
55 return (Serializable) session.getAttribute(key);
56 }
57
58 }