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1
5 package com.terracotta.session;
6
7 import com.tc.object.bytecode.ManagerUtil;
8 import com.terracotta.session.util.Assert;
9 import com.terracotta.session.util.ConfigProperties;
10 import com.terracotta.session.util.ContextMgr;
11 import com.terracotta.session.util.DefaultContextMgr;
12 import com.terracotta.session.util.DefaultCookieWriter;
13 import com.terracotta.session.util.DefaultIdGenerator;
14 import com.terracotta.session.util.DefaultLifecycleEventMgr;
15 import com.terracotta.session.util.LifecycleEventMgr;
16 import com.terracotta.session.util.SessionCookieWriter;
17 import com.terracotta.session.util.SessionIdGenerator;
18
19 import java.io.IOException  ;
20
21 import javax.servlet.Filter ;
22 import javax.servlet.FilterChain ;
23 import javax.servlet.FilterConfig ;
24 import javax.servlet.ServletContext ;
25 import javax.servlet.ServletException ;
26 import javax.servlet.ServletRequest ;
27 import javax.servlet.ServletResponse ;
28 import javax.servlet.http.HttpServletRequest ;
29 import javax.servlet.http.HttpServletResponse ;
30
31 public class SessionFilter implements Filter {
32
33 private TerracottaSessionManager mgr = null;
34 private ServletContext servletContext = null;
35 public static final String FILTER_CLASS = SessionFilter.class.getName();
36 public static final String FILTER_NAME = "Terracotta Session Filter";
37
38 public SessionFilter() {
39 }
41
42 public void init(FilterConfig config) {
43 servletContext = config.getServletContext();
44 }
45
46 public void destroy() {
47 }
49
50 public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException ,
51 ServletException {
52 if (request instanceof HttpServletRequest && response instanceof HttpServletResponse ) {
53 doHttpFilter((HttpServletRequest ) request, (HttpServletResponse ) response, chain);
54 } else {
55 chain.doFilter(request, response);
56 }
57 }
58
59 private void doHttpFilter(HttpServletRequest request, HttpServletResponse response, FilterChain chain)
60 throws IOException , ServletException {
61 Assert.pre(request != null);
62 Assert.pre(response != null);
63 Assert.pre(chain != null);
64
65 TerracottaSessionManager tcMgr = getManager(request);
66 TerracottaRequest sReq = tcMgr.preprocess(request, response);
67 TerracottaResponse sRes = tcMgr.createResponse(sReq, response);
68 try {
69 chain.doFilter(sReq, sRes);
70 } finally {
71 tcMgr.postprocess(sReq);
72 }
73 }
74
75 protected synchronized TerracottaSessionManager getManager(HttpServletRequest req) {
76 if (mgr == null) {
77 if (servletContext instanceof WebAppConfig) mgr = createWebAppConfigManager(req, (WebAppConfig) servletContext,
78 servletContext);
79 else mgr = createDefaultManager(req, servletContext);
80 }
81 Assert.post(mgr != null);
82 return mgr;
83 }
84
85 protected static TerracottaSessionManager createDefaultManager(final HttpServletRequest req,
86 final ServletContext servletContext) {
87 final TerracottaSessionManager rv = createManager(req, null, new BaseRequestResponseFactory(), servletContext);
88 return rv;
89 }
90
91 protected static TerracottaSessionManager createWebAppConfigManager(final HttpServletRequest req,
92 final WebAppConfig wac,
93 final ServletContext servletContext) {
94 final TerracottaSessionManager rv = createManager(req, wac, pickFactory(), servletContext);
95 return rv;
96 }
97
98 protected static TerracottaSessionManager createManager(final HttpServletRequest req, final WebAppConfig wac,
99 final RequestResponseFactory factory,
100 final ServletContext servletContext) {
101 final ConfigProperties cp = new ConfigProperties(wac);
102
103 String appName = DefaultContextMgr.computeAppName(req);
104 int lockType = ManagerUtil.getSessionLockType(appName);
105 final SessionIdGenerator sig = DefaultIdGenerator.makeInstance(cp, lockType);
106
107 final SessionCookieWriter scw = DefaultCookieWriter.makeInstance(cp);
108 final LifecycleEventMgr eventMgr = DefaultLifecycleEventMgr.makeInstance(cp);
109 final ContextMgr contextMgr = DefaultContextMgr.makeInstance(req, servletContext);
110 final TerracottaSessionManager rv = new TerracottaSessionManager(sig, scw, eventMgr, contextMgr, factory, cp);
111 return rv;
112 }
113
114 private static RequestResponseFactory pickFactory() {
115
118 try {
119 ClassLoader.getSystemClassLoader().loadClass("weblogic.Server");
120 return (RequestResponseFactory) Class.forName("com.terracotta.session.WeblogicRequestResponseFactory")
121 .newInstance();
122 } catch (Exception e) {
123 return new BaseRequestResponseFactory();
124 }
125 }
126
127 }
128 |
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