Mercurial Hosting > luan
view src/org/eclipse/jetty/server/AsyncHttpConnection.java @ 983:23ec25435b8c
simplify AbstractGenerator
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Sun, 16 Oct 2016 22:58:41 -0600 |
parents | bdb6eb0fbf93 |
children | 21910079096e |
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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.server; import java.io.IOException; import org.eclipse.jetty.http.HttpException; import org.eclipse.jetty.http.HttpStatus; import org.eclipse.jetty.io.AsyncEndPoint; import org.eclipse.jetty.io.EndPoint; import org.eclipse.jetty.io.nio.AsyncConnection; import org.eclipse.jetty.io.nio.SelectChannelEndPoint; import org.eclipse.jetty.server.nio.SelectChannelConnector; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /* ------------------------------------------------------------ */ /** Asychronous Server HTTP connection * */ public final class AsyncHttpConnection extends AbstractHttpConnection implements AsyncConnection { private final static int NO_PROGRESS_INFO = Integer.getInteger("org.mortbay.jetty.NO_PROGRESS_INFO",100); private final static int NO_PROGRESS_CLOSE = Integer.getInteger("org.mortbay.jetty.NO_PROGRESS_CLOSE",200); private static final Logger LOG = LoggerFactory.getLogger(AsyncHttpConnection.class); private int _total_no_progress; private final AsyncEndPoint _asyncEndp; private boolean _readInterested = true; public AsyncHttpConnection(SelectChannelConnector connector, AsyncEndPoint endpoint) { super(connector,endpoint); _asyncEndp = endpoint; } @Override public void handle() throws IOException { boolean some_progress = false; boolean progress = true; try { // While progress and the connection has not changed while (progress) { progress=false; try { // Parse more input if (!_parser.isComplete() && _parser.parseAvailable()) progress = true; // Generate more output if (_generator.isCommitted() && !_generator.isComplete() && !_endp.isOutputShutdown()) if (_generator.flushBuffer()>0) progress = true; // Flush output _endp.flush(); // Has any IO been done by the endpoint itself since last loop if (_asyncEndp.hasProgressed()) progress = true; } catch (HttpException e) { if (LOG.isDebugEnabled()) { LOG.debug("uri="+_uri); LOG.debug("fields="+_requestFields); LOG.debug("",e); } progress = true; _generator.sendError(e.getStatus(), e.getReason(), null, true); } finally { some_progress |= progress; // Is this request/response round complete and are fully flushed? boolean parserComplete = _parser.isComplete(); boolean generatorComplete = _generator.isComplete(); boolean complete = parserComplete && generatorComplete; if (parserComplete) { if (generatorComplete) { // Reset the parser/generator progress=true; reset(); // TODO Is this still required? if (!_generator.isPersistent() && !_endp.isOutputShutdown()) { LOG.warn("Safety net oshut!!! IF YOU SEE THIS, PLEASE RAISE BUGZILLA"); _endp.shutdownOutput(); } } else { // We have finished parsing, but not generating so // we must not be interested in reading until we // have finished generating and we reset the generator _readInterested = false; LOG.debug("Disabled read interest while writing response {}", _endp); } } } } } finally { // return buffers _parser.returnBuffers(); _generator.returnBuffers(); // Safety net to catch spinning if (some_progress) _total_no_progress = 0; else { _total_no_progress++; if (NO_PROGRESS_INFO>0 && _total_no_progress%NO_PROGRESS_INFO==0 && (NO_PROGRESS_CLOSE<=0 || _total_no_progress< NO_PROGRESS_CLOSE)) LOG.info("EndPoint making no progress: "+_total_no_progress+" "+_endp+" "+this); if (NO_PROGRESS_CLOSE>0 && _total_no_progress==NO_PROGRESS_CLOSE) { LOG.warn("Closing EndPoint making no progress: "+_total_no_progress+" "+_endp+" "+this); if (_endp instanceof SelectChannelEndPoint) _endp.getChannel().close(); } } } } @Override public void onInputShutdown() throws IOException { // If we don't have a committed response and we are not suspended if (_generator.isIdle()) { // then no more can happen, so close. _endp.close(); } // Make idle parser seek EOF if (_parser.isIdle()) _parser.setPersistent(false); } @Override protected void reset() { _readInterested = true; LOG.debug("Enabled read interest {}", _endp); super.reset(); } @Override public boolean isSuspended() { return !_readInterested; } }