Mercurial Hosting > luan

comparison src/org/eclipse/jetty/continuation/ContinuationSupport.java @ 802:3428c60d7cfc

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
replace jetty jars with source
author Franklin Schmidt <fschmidt@gmail.com>
date Wed, 07 Sep 2016 21:15:48 -0600
parents
children dfa742c663f9
comparison
equal deleted inserted replaced
801:6a21393191c1 802:3428c60d7cfc
1 //
2 // ========================================================================
3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
4 // ------------------------------------------------------------------------
5 // All rights reserved. This program and the accompanying materials
6 // are made available under the terms of the Eclipse Public License v1.0
7 // and Apache License v2.0 which accompanies this distribution.
8 //
9 // The Eclipse Public License is available at
10 // http://www.eclipse.org/legal/epl-v10.html
11 //
12 // The Apache License v2.0 is available at
13 // http://www.opensource.org/licenses/apache2.0.php
14 //
15 // You may elect to redistribute this code under either of these licenses.
16 // ========================================================================
17 //
18
19 package org.eclipse.jetty.continuation;
20
21 import java.lang.reflect.Constructor;
22 import javax.servlet.ServletRequest;
23 import javax.servlet.ServletRequestWrapper;
24 import javax.servlet.ServletResponse;
25
26 /* ------------------------------------------------------------ */
27 /** ContinuationSupport.
28 *
29 * Factory class for accessing Continuation instances, which with either be
30 * native to the container (jetty >= 6), a servlet 3.0 or a faux continuation.
31 *
32 */
33 public class ContinuationSupport
34 {
35 static final boolean __jetty6;
36 static final boolean __servlet3;
37 static final Class<?> __waitingContinuation;
38 static final Constructor<? extends Continuation> __newServlet3Continuation;
39 static final Constructor<? extends Continuation> __newJetty6Continuation;
40 static
41 {
42 boolean servlet3Support=false;
43 Constructor<? extends Continuation>s3cc=null;
44 try
45 {
46 boolean servlet3=ServletRequest.class.getMethod("startAsync")!=null;
47 if (servlet3)
48 {
49 Class<? extends Continuation> s3c = ContinuationSupport.class.getClassLoader().loadClass("org.eclipse.jetty.continuation.Servlet3Continuation").asSubclass(Continuation.class);
50 s3cc=s3c.getConstructor(ServletRequest.class);
51 servlet3Support=true;
52 }
53 }
54 catch (Exception e)
55 {}
56 finally
57 {
58 __servlet3=servlet3Support;
59 __newServlet3Continuation=s3cc;
60 }
61
62 boolean jetty6Support=false;
63 Constructor<? extends Continuation>j6cc=null;
64 try
65 {
66 Class<?> jetty6ContinuationClass = ContinuationSupport.class.getClassLoader().loadClass("org.mortbay.util.ajax.Continuation");
67 boolean jetty6=jetty6ContinuationClass!=null;
68 if (jetty6)
69 {
70 Class<? extends Continuation> j6c = ContinuationSupport.class.getClassLoader().loadClass("org.eclipse.jetty.continuation.Jetty6Continuation").asSubclass(Continuation.class);
71 j6cc=j6c.getConstructor(ServletRequest.class, jetty6ContinuationClass);
72 jetty6Support=true;
73 }
74 }
75 catch (Exception e)
76 {}
77 finally
78 {
79 __jetty6=jetty6Support;
80 __newJetty6Continuation=j6cc;
81 }
82
83 Class<?> waiting=null;
84 try
85 {
86 waiting=ContinuationSupport.class.getClassLoader().loadClass("org.mortbay.util.ajax.WaitingContinuation");
87 }
88 catch (Exception e)
89 {
90 }
91 finally
92 {
93 __waitingContinuation=waiting;
94 }
95 }
96
97 /* ------------------------------------------------------------ */
98 /**
99 * Get a Continuation. The type of the Continuation returned may
100 * vary depending on the container in which the application is
101 * deployed. It may be an implementation native to the container (eg
102 * org.eclipse.jetty.server.AsyncContinuation) or one of the utility
103 * implementations provided such as an internal <code>FauxContinuation</code>
104 * or a real implementation like {@link org.eclipse.jetty.continuation.Servlet3Continuation}.
105 * @param request The request
106 * @return a Continuation instance
107 */
108 public static Continuation getContinuation(ServletRequest request)
109 {
110 Continuation continuation = (Continuation) request.getAttribute(Continuation.ATTRIBUTE);
111 if (continuation!=null)
112 return continuation;
113
114 while (request instanceof ServletRequestWrapper)
115 request=((ServletRequestWrapper)request).getRequest();
116
117 if (__servlet3 )
118 {
119 try
120 {
121 continuation=__newServlet3Continuation.newInstance(request);
122 request.setAttribute(Continuation.ATTRIBUTE,continuation);
123 return continuation;
124 }
125 catch(Exception e)
126 {
127 throw new RuntimeException(e);
128 }
129 }
130
131 if (__jetty6)
132 {
133 Object c=request.getAttribute("org.mortbay.jetty.ajax.Continuation");
134 try
135 {
136 if (c==null || __waitingContinuation==null || __waitingContinuation.isInstance(c))
137 continuation=new FauxContinuation(request);
138 else
139 continuation= __newJetty6Continuation.newInstance(request,c);
140 request.setAttribute(Continuation.ATTRIBUTE,continuation);
141 return continuation;
142 }
143 catch(Exception e)
144 {
145 throw new RuntimeException(e);
146 }
147 }
148
149 throw new IllegalStateException("!(Jetty || Servlet 3.0 || ContinuationFilter)");
150 }
151
152 /* ------------------------------------------------------------ */
153 /**
154 * @param request the servlet request
155 * @param response the servlet response
156 * @deprecated use {@link #getContinuation(ServletRequest)}
157 * @return the continuation
158 */
159 @Deprecated
160 public static Continuation getContinuation(final ServletRequest request, final ServletResponse response)
161 {
162 return getContinuation(request);
163 }
164 }