Mercurial Hosting > luan
view src/org/eclipse/jetty/continuation/ContinuationSupport.java @ 819:17bd0b170ed6
remove Atomics
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Fri, 09 Sep 2016 17:10:47 -0600 |
parents | 3428c60d7cfc |
children | dfa742c663f9 |
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// // ======================================================================== // 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); } }