01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. The ASF licenses this file to You
04: * under the Apache License, Version 2.0 (the "License"); you may not
05: * use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
10: * Unless required by applicable law or agreed to in writing, software
11: * distributed under the License is distributed on an "AS IS" BASIS,
12: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13: * See the License for the specific language governing permissions and
14: * limitations under the License. For additional information regarding
15: * copyright in this work, please see the NOTICE file in the top level
16: * directory of this distribution.
17: */
18: package org.apache.roller.ui.core.filters;
19:
20: import java.io.IOException;
21: import javax.servlet.Filter;
22: import javax.servlet.FilterChain;
23: import javax.servlet.FilterConfig;
24: import javax.servlet.ServletException;
25: import javax.servlet.ServletRequest;
26: import javax.servlet.ServletResponse;
27: import javax.servlet.http.HttpServletRequest;
28: import javax.servlet.http.HttpServletResponse;
29: import org.apache.commons.logging.Log;
30: import org.apache.commons.logging.LogFactory;
31: import org.apache.roller.business.Roller;
32: import org.apache.roller.business.RollerFactory;
33:
34: /**
35: * Sole responsibility is to ensure that each request's Roller
36: * persistence session is released at end of the request.
37: *
38: * @web.filter name="PersistenceSessionFilter"
39: * @author David M. Johnson
40: */
41: public class PersistenceSessionFilter implements Filter {
42:
43: private static Log mLogger = LogFactory
44: .getLog(PersistenceSessionFilter.class);
45:
46: /**
47: * Release Roller persistence session at end of request processing.
48: */
49: public void doFilter(ServletRequest req, ServletResponse res,
50: FilterChain chain) throws IOException, ServletException {
51:
52: HttpServletRequest request = (HttpServletRequest) req;
53: HttpServletResponse response = (HttpServletResponse) res;
54:
55: mLogger.debug("Entered PersistenceSessionFilter");
56:
57: Roller roller = RollerFactory.getRoller();
58: try {
59: chain.doFilter(request, response);
60: } finally {
61: mLogger.debug("Releasing Roller Session");
62: roller.release();
63: }
64:
65: mLogger.debug("Exiting PersistenceSessionFilter");
66: }
67:
68: public void init(FilterConfig filterConfig) throws ServletException {
69: }
70:
71: public void destroy() {
72: }
73:
74: }
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