| // |
| // ======================================================================== |
| // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. |
| // ------------------------------------------------------------------------ |
| // All rights reserved. This program and the accompanying materials |
| // are made available under the terms of the Eclipse Public License v1.0 |
| // and Apache License v2.0 which accompanies this distribution. |
| // |
| // The Eclipse Public License is available at |
| // http://www.eclipse.org/legal/epl-v10.html |
| // |
| // The Apache License v2.0 is available at |
| // http://www.opensource.org/licenses/apache2.0.php |
| // |
| // You may elect to redistribute this code under either of these licenses. |
| // ======================================================================== |
| // |
| |
| package org.eclipse.jetty.continuation; |
| |
| import java.lang.reflect.Constructor; |
| import javax.servlet.ServletRequest; |
| import javax.servlet.ServletRequestWrapper; |
| import javax.servlet.ServletResponse; |
| |
| /* ------------------------------------------------------------ */ |
| /** ContinuationSupport. |
| * |
| * Factory class for accessing Continuation instances, which with either be |
| * native to the container (jetty >= 6), a servlet 3.0 or a faux continuation. |
| * |
| */ |
| public class ContinuationSupport |
| { |
| static final boolean __jetty6; |
| static final boolean __servlet3; |
| static final Class<?> __waitingContinuation; |
| static final Constructor<? extends Continuation> __newServlet3Continuation; |
| static final Constructor<? extends Continuation> __newJetty6Continuation; |
| static |
| { |
| boolean servlet3Support=false; |
| Constructor<? extends Continuation>s3cc=null; |
| try |
| { |
| boolean servlet3=ServletRequest.class.getMethod("startAsync")!=null; |
| if (servlet3) |
| { |
| Class<? extends Continuation> s3c = ContinuationSupport.class.getClassLoader().loadClass("org.eclipse.jetty.continuation.Servlet3Continuation").asSubclass(Continuation.class); |
| s3cc=s3c.getConstructor(ServletRequest.class); |
| servlet3Support=true; |
| } |
| } |
| catch (Exception e) |
| {} |
| finally |
| { |
| __servlet3=servlet3Support; |
| __newServlet3Continuation=s3cc; |
| } |
| |
| boolean jetty6Support=false; |
| Constructor<? extends Continuation>j6cc=null; |
| try |
| { |
| Class<?> jetty6ContinuationClass = ContinuationSupport.class.getClassLoader().loadClass("org.mortbay.util.ajax.Continuation"); |
| boolean jetty6=jetty6ContinuationClass!=null; |
| if (jetty6) |
| { |
| Class<? extends Continuation> j6c = ContinuationSupport.class.getClassLoader().loadClass("org.eclipse.jetty.continuation.Jetty6Continuation").asSubclass(Continuation.class); |
| j6cc=j6c.getConstructor(ServletRequest.class, jetty6ContinuationClass); |
| jetty6Support=true; |
| } |
| } |
| catch (Exception e) |
| {} |
| finally |
| { |
| __jetty6=jetty6Support; |
| __newJetty6Continuation=j6cc; |
| } |
| |
| Class<?> waiting=null; |
| try |
| { |
| waiting=ContinuationSupport.class.getClassLoader().loadClass("org.mortbay.util.ajax.WaitingContinuation"); |
| } |
| catch (Exception e) |
| { |
| } |
| finally |
| { |
| __waitingContinuation=waiting; |
| } |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /** |
| * Get a Continuation. The type of the Continuation returned may |
| * vary depending on the container in which the application is |
| * deployed. It may be an implementation native to the container (eg |
| * org.eclipse.jetty.server.AsyncContinuation) or one of the utility |
| * implementations provided such as an internal <code>FauxContinuation</code> |
| * or a real implementation like {@link org.eclipse.jetty.continuation.Servlet3Continuation}. |
| * @param request The request |
| * @return a Continuation instance |
| */ |
| public static Continuation getContinuation(ServletRequest request) |
| { |
| Continuation continuation = (Continuation) request.getAttribute(Continuation.ATTRIBUTE); |
| if (continuation!=null) |
| return continuation; |
| |
| while (request instanceof ServletRequestWrapper) |
| request=((ServletRequestWrapper)request).getRequest(); |
| |
| if (__servlet3 ) |
| { |
| try |
| { |
| continuation=__newServlet3Continuation.newInstance(request); |
| request.setAttribute(Continuation.ATTRIBUTE,continuation); |
| return continuation; |
| } |
| catch(Exception e) |
| { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| if (__jetty6) |
| { |
| Object c=request.getAttribute("org.mortbay.jetty.ajax.Continuation"); |
| try |
| { |
| if (c==null || __waitingContinuation==null || __waitingContinuation.isInstance(c)) |
| continuation=new FauxContinuation(request); |
| else |
| continuation= __newJetty6Continuation.newInstance(request,c); |
| request.setAttribute(Continuation.ATTRIBUTE,continuation); |
| return continuation; |
| } |
| catch(Exception e) |
| { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| throw new IllegalStateException("!(Jetty || Servlet 3.0 || ContinuationFilter)"); |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /** |
| * @param request the servlet request |
| * @param response the servlet response |
| * @deprecated use {@link #getContinuation(ServletRequest)} |
| * @return the continuation |
| */ |
| @Deprecated |
| public static Continuation getContinuation(final ServletRequest request, final ServletResponse response) |
| { |
| return getContinuation(request); |
| } |
| } |