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14 package org.eclipse.jetty.continuation;
15
16 import java.lang.reflect.Constructor;
17 import javax.servlet.ServletRequest;
18 import javax.servlet.ServletRequestWrapper;
19 import javax.servlet.ServletResponse;
20 import javax.servlet.ServletResponseWrapper;
21
22 import org.mortbay.util.ajax.WaitingContinuation;
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31 public class ContinuationSupport
32 {
33 static final boolean __jetty6;
34 static final boolean __servlet3;
35 static final Class<?> __waitingContinuation;
36 static final Constructor<? extends Continuation> __newServlet3Continuation;
37 static final Constructor<? extends Continuation> __newJetty6Continuation;
38 static
39 {
40 boolean servlet3Support=false;
41 Constructor<? extends Continuation>s3cc=null;
42 try
43 {
44 boolean servlet3=ServletRequest.class.getMethod("startAsync")!=null;
45 if (servlet3)
46 {
47 Class<? extends Continuation> s3c = ContinuationSupport.class.getClassLoader().loadClass("org.eclipse.jetty.continuation.Servlet3Continuation").asSubclass(Continuation.class);
48 s3cc=s3c.getConstructor(ServletRequest.class);
49 servlet3Support=true;
50 }
51 }
52 catch (Exception e)
53 {}
54 finally
55 {
56 __servlet3=servlet3Support;
57 __newServlet3Continuation=s3cc;
58 }
59
60 boolean jetty6Support=false;
61 Constructor<? extends Continuation>j6cc=null;
62 try
63 {
64 Class<?> jetty6ContinuationClass = ContinuationSupport.class.getClassLoader().loadClass("org.mortbay.util.ajax.Continuation");
65 boolean jetty6=jetty6ContinuationClass!=null;
66 if (jetty6)
67 {
68 Class<? extends Continuation> j6c = ContinuationSupport.class.getClassLoader().loadClass("org.eclipse.jetty.continuation.Jetty6Continuation").asSubclass(Continuation.class);
69 j6cc=j6c.getConstructor(ServletRequest.class, jetty6ContinuationClass);
70 jetty6Support=true;
71 }
72 }
73 catch (Exception e)
74 {}
75 finally
76 {
77 __jetty6=jetty6Support;
78 __newJetty6Continuation=j6cc;
79 }
80
81 Class<?> waiting=null;
82 try
83 {
84 waiting=ContinuationSupport.class.getClassLoader().loadClass("org.mortbay.util.ajax.WaitingContinuation");
85 }
86 catch (Exception e)
87 {
88 }
89 finally
90 {
91 __waitingContinuation=waiting;
92 }
93 }
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106 public static Continuation getContinuation(ServletRequest request)
107 {
108 Continuation continuation = (Continuation) request.getAttribute(Continuation.ATTRIBUTE);
109 if (continuation!=null)
110 return continuation;
111
112 while (request instanceof ServletRequestWrapper)
113 request=((ServletRequestWrapper)request).getRequest();
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115 if (__servlet3 )
116 {
117 try
118 {
119 continuation=__newServlet3Continuation.newInstance(request);
120 request.setAttribute(Continuation.ATTRIBUTE,continuation);
121 return continuation;
122 }
123 catch(Exception e)
124 {
125 throw new RuntimeException(e);
126 }
127 }
128
129 if (__jetty6)
130 {
131 Object c=request.getAttribute("org.mortbay.jetty.ajax.Continuation");
132 try
133 {
134 if (c==null || __waitingContinuation==null || __waitingContinuation.isInstance(c))
135 continuation=new FauxContinuation(request);
136 else
137 continuation= __newJetty6Continuation.newInstance(request,c);
138 request.setAttribute(Continuation.ATTRIBUTE,continuation);
139 return continuation;
140 }
141 catch(Exception e)
142 {
143 throw new RuntimeException(e);
144 }
145 }
146
147 throw new IllegalStateException("!(Jetty || Servlet 3.0 || ContinuationFilter)");
148 }
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157 public static Continuation getContinuation(final ServletRequest request, final ServletResponse response)
158 {
159 return getContinuation(request);
160 }
161 }