01: /******************************************************************************
02: * JBoss, a division of Red Hat *
03: * Copyright 2006, Red Hat Middleware, LLC, and individual *
04: * contributors as indicated by the @authors tag. See the *
05: * copyright.txt in the distribution for a full listing of *
06: * individual contributors. *
07: * *
08: * This is free software; you can redistribute it and/or modify it *
09: * under the terms of the GNU Lesser General Public License as *
10: * published by the Free Software Foundation; either version 2.1 of *
11: * the License, or (at your option) any later version. *
12: * *
13: * This software is distributed in the hope that it will be useful, *
14: * but WITHOUT ANY WARRANTY; without even the implied warranty of *
15: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
16: * Lesser General Public License for more details. *
17: * *
18: * You should have received a copy of the GNU Lesser General Public *
19: * License along with this software; if not, write to the Free *
20: * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA *
21: * 02110-1301 USA, or see the FSF site: http://www.fsf.org. *
22: ******************************************************************************/package org.jboss.portal.wsrp.servlet;
23:
24: import org.jboss.logging.Logger;
25: import org.jboss.portal.common.transaction.TransactionException;
26: import org.jboss.portal.common.transaction.TransactionManagerProvider;
27: import org.jboss.portal.common.transaction.Transactions;
28:
29: import javax.servlet.Filter;
30: import javax.servlet.FilterChain;
31: import javax.servlet.FilterConfig;
32: import javax.servlet.ServletException;
33: import javax.servlet.ServletRequest;
34: import javax.servlet.ServletResponse;
35: import javax.transaction.Transaction;
36: import javax.transaction.TransactionManager;
37: import java.io.IOException;
38:
39: /**
40: * Wrap wsrp services in a transaction because the portal needs one.
41: *
42: * @author <a href="mailto:julien@jboss.org">Julien Viet</a>
43: * @version $Revision: 8784 $
44: */
45: public class TransactionFilter implements Filter {
46:
47: /** . */
48: private static Logger log = Logger
49: .getLogger(TransactionFilter.class);
50:
51: /** . */
52: private TransactionManager tm;
53:
54: public void init(FilterConfig filterConfig) throws ServletException {
55:
56: }
57:
58: public void doFilter(ServletRequest req, ServletResponse resp,
59: FilterChain chain) throws IOException, ServletException {
60: if (tm == null) {
61: try {
62: tm = TransactionManagerProvider.JBOSS_PROVIDER
63: .getTransactionManager();
64: } catch (Exception e) {
65: throw new ServletException(e);
66: }
67: }
68:
69: Transaction oldTx = null;
70: try {
71: oldTx = Transactions.applyBefore(
72: Transactions.TYPE_REQUIRED, tm);
73: chain.doFilter(req, resp);
74: } catch (TransactionException e) {
75: throw new ServletException(e);
76: } finally {
77: try {
78: Transactions.applyAfter(Transactions.TYPE_REQUIRED, tm,
79: oldTx);
80: } catch (TransactionException e) {
81: log.error("", e);
82: }
83: }
84: }
85:
86: public void destroy() {
87: tm = null;
88: }
89: }
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