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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;
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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 }
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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();
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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 }
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159 @Deprecated
160 public static Continuation getContinuation(final ServletRequest request, final ServletResponse response)
161 {
162 return getContinuation(request);
163 }
164 }