| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.tomcat.util.net; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| import java.net.InetSocketAddress; |
| import java.net.ServerSocket; |
| import java.net.Socket; |
| import java.net.SocketTimeoutException; |
| import java.nio.ByteBuffer; |
| import java.nio.channels.CancelledKeyException; |
| import java.nio.channels.FileChannel; |
| import java.nio.channels.SelectionKey; |
| import java.nio.channels.Selector; |
| import java.nio.channels.ServerSocketChannel; |
| import java.nio.channels.SocketChannel; |
| import java.nio.channels.WritableByteChannel; |
| import java.util.ConcurrentModificationException; |
| import java.util.Iterator; |
| import java.util.Locale; |
| import java.util.Set; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.Executor; |
| import java.util.concurrent.RejectedExecutionException; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| import javax.net.ssl.KeyManager; |
| import javax.net.ssl.SSLContext; |
| import javax.net.ssl.SSLEngine; |
| import javax.net.ssl.SSLSessionContext; |
| import javax.net.ssl.X509KeyManager; |
| |
| import org.apache.juli.logging.Log; |
| import org.apache.juli.logging.LogFactory; |
| import org.apache.tomcat.util.ExceptionUtils; |
| import org.apache.tomcat.util.IntrospectionUtils; |
| import org.apache.tomcat.util.collections.SynchronizedQueue; |
| import org.apache.tomcat.util.collections.SynchronizedStack; |
| import org.apache.tomcat.util.compat.JreCompat; |
| import org.apache.tomcat.util.net.AbstractEndpoint.Handler.SocketState; |
| import org.apache.tomcat.util.net.SecureNioChannel.ApplicationBufferHandler; |
| import org.apache.tomcat.util.net.jsse.NioX509KeyManager; |
| |
| /** |
| * NIO tailored thread pool, providing the following services: |
| * <ul> |
| * <li>Socket acceptor thread</li> |
| * <li>Socket poller thread</li> |
| * <li>Worker threads pool</li> |
| * </ul> |
| * |
| * When switching to Java 5, there's an opportunity to use the virtual |
| * machine's thread pool. |
| * |
| * @author Mladen Turk |
| * @author Remy Maucherat |
| */ |
| public class NioEndpoint extends AbstractEndpoint<NioChannel> { |
| |
| |
| // -------------------------------------------------------------- Constants |
| |
| |
| private static final Log log = LogFactory.getLog(NioEndpoint.class); |
| |
| |
| public static final int OP_REGISTER = 0x100; //register interest op |
| @Deprecated // Unused. Will be removed in Tomcat 8.5.x |
| public static final int OP_CALLBACK = 0x200; //callback interest op |
| |
| // ----------------------------------------------------------------- Fields |
| |
| private NioSelectorPool selectorPool = new NioSelectorPool(); |
| |
| /** |
| * Server socket "pointer". |
| */ |
| private ServerSocketChannel serverSock = null; |
| |
| /** |
| * use send file |
| */ |
| private boolean useSendfile = true; |
| |
| /** |
| * The size of the OOM parachute. |
| */ |
| private int oomParachute = 1024*1024; |
| /** |
| * The oom parachute, when an OOM error happens, |
| * will release the data, giving the JVM instantly |
| * a chunk of data to be able to recover with. |
| */ |
| private byte[] oomParachuteData = null; |
| |
| /** |
| * Make sure this string has already been allocated |
| */ |
| private static final String oomParachuteMsg = |
| "SEVERE:Memory usage is low, parachute is non existent, your system may start failing."; |
| |
| /** |
| * Keep track of OOM warning messages. |
| */ |
| private long lastParachuteCheck = System.currentTimeMillis(); |
| |
| /** |
| * |
| */ |
| private volatile CountDownLatch stopLatch = null; |
| |
| /** |
| * Cache for SocketProcessor objects |
| */ |
| private SynchronizedStack<SocketProcessor> processorCache; |
| |
| /** |
| * Cache for poller events |
| */ |
| private SynchronizedStack<PollerEvent> eventCache; |
| |
| /** |
| * Bytebuffer cache, each channel holds a set of buffers (two, except for SSL holds four) |
| */ |
| private SynchronizedStack<NioChannel> nioChannels; |
| |
| |
| // ------------------------------------------------------------ Constructor |
| |
| public NioEndpoint() { |
| // If running on Java 7, the insecure DHE ciphers need to be excluded by |
| // default |
| if (!JreCompat.isJre8Available()) { |
| setCiphers(DEFAULT_CIPHERS + ":!DHE"); |
| } |
| } |
| |
| |
| // ------------------------------------------------------------- Properties |
| |
| /** |
| * Generic properties, introspected |
| */ |
| @Override |
| public boolean setProperty(String name, String value) { |
| final String selectorPoolName = "selectorPool."; |
| try { |
| if (name.startsWith(selectorPoolName)) { |
| return IntrospectionUtils.setProperty(selectorPool, name.substring(selectorPoolName.length()), value); |
| } else { |
| return super.setProperty(name, value); |
| } |
| }catch ( Exception x ) { |
| log.error("Unable to set attribute \""+name+"\" to \""+value+"\"",x); |
| return false; |
| } |
| } |
| |
| |
| /** |
| * Priority of the poller threads. |
| */ |
| private int pollerThreadPriority = Thread.NORM_PRIORITY; |
| public void setPollerThreadPriority(int pollerThreadPriority) { this.pollerThreadPriority = pollerThreadPriority; } |
| public int getPollerThreadPriority() { return pollerThreadPriority; } |
| |
| |
| /** |
| * Handling of accepted sockets. |
| */ |
| private Handler handler = null; |
| public void setHandler(Handler handler ) { this.handler = handler; } |
| public Handler getHandler() { return handler; } |
| |
| |
| /** |
| * Allow comet request handling. |
| */ |
| private boolean useComet = true; |
| public void setUseComet(boolean useComet) { this.useComet = useComet; } |
| @Override |
| public boolean getUseComet() { return useComet; } |
| @Override |
| public boolean getUseCometTimeout() { return getUseComet(); } |
| @Override |
| public boolean getUsePolling() { return true; } // Always supported |
| |
| |
| /** |
| * Poller thread count. |
| */ |
| private int pollerThreadCount = Math.min(2,Runtime.getRuntime().availableProcessors()); |
| public void setPollerThreadCount(int pollerThreadCount) { this.pollerThreadCount = pollerThreadCount; } |
| public int getPollerThreadCount() { return pollerThreadCount; } |
| |
| private long selectorTimeout = 1000; |
| public void setSelectorTimeout(long timeout){ this.selectorTimeout = timeout;} |
| public long getSelectorTimeout(){ return this.selectorTimeout; } |
| /** |
| * The socket poller. |
| */ |
| private Poller[] pollers = null; |
| private AtomicInteger pollerRotater = new AtomicInteger(0); |
| /** |
| * Return an available poller in true round robin fashion |
| */ |
| public Poller getPoller0() { |
| int idx = Math.abs(pollerRotater.incrementAndGet()) % pollers.length; |
| return pollers[idx]; |
| } |
| |
| |
| public void setSelectorPool(NioSelectorPool selectorPool) { |
| this.selectorPool = selectorPool; |
| } |
| |
| public void setSocketProperties(SocketProperties socketProperties) { |
| this.socketProperties = socketProperties; |
| } |
| |
| public void setUseSendfile(boolean useSendfile) { |
| this.useSendfile = useSendfile; |
| } |
| |
| /** |
| * Is deferAccept supported? |
| */ |
| @Override |
| public boolean getDeferAccept() { |
| // Not supported |
| return false; |
| } |
| |
| public void setOomParachute(int oomParachute) { |
| this.oomParachute = oomParachute; |
| } |
| |
| public void setOomParachuteData(byte[] oomParachuteData) { |
| this.oomParachuteData = oomParachuteData; |
| } |
| |
| |
| private SSLContext sslContext = null; |
| public SSLContext getSSLContext() { return sslContext;} |
| public void setSSLContext(SSLContext c) { sslContext = c;} |
| private String[] enabledCiphers; |
| private String[] enabledProtocols; |
| |
| /** |
| * Port in use. |
| */ |
| @Override |
| public int getLocalPort() { |
| ServerSocketChannel ssc = serverSock; |
| if (ssc == null) { |
| return -1; |
| } else { |
| ServerSocket s = ssc.socket(); |
| if (s == null) { |
| return -1; |
| } else { |
| return s.getLocalPort(); |
| } |
| } |
| } |
| |
| |
| @Override |
| public String[] getCiphersUsed() { |
| return enabledCiphers; |
| } |
| |
| |
| // --------------------------------------------------------- OOM Parachute Methods |
| |
| protected void checkParachute() { |
| boolean para = reclaimParachute(false); |
| if (!para && (System.currentTimeMillis()-lastParachuteCheck)>10000) { |
| try { |
| log.fatal(oomParachuteMsg); |
| }catch (Throwable t) { |
| ExceptionUtils.handleThrowable(t); |
| System.err.println(oomParachuteMsg); |
| } |
| lastParachuteCheck = System.currentTimeMillis(); |
| } |
| } |
| |
| protected boolean reclaimParachute(boolean force) { |
| if ( oomParachuteData != null ) return true; |
| if ( oomParachute > 0 && ( force || (Runtime.getRuntime().freeMemory() > (oomParachute*2))) ) |
| oomParachuteData = new byte[oomParachute]; |
| return oomParachuteData != null; |
| } |
| |
| protected void releaseCaches() { |
| this.nioChannels.clear(); |
| this.processorCache.clear(); |
| if ( handler != null ) handler.recycle(); |
| |
| } |
| |
| // --------------------------------------------------------- Public Methods |
| /** |
| * Number of keepalive sockets. |
| */ |
| public int getKeepAliveCount() { |
| if (pollers == null) { |
| return 0; |
| } else { |
| int sum = 0; |
| for (int i=0; i<pollers.length; i++) { |
| sum += pollers[i].getKeyCount(); |
| } |
| return sum; |
| } |
| } |
| |
| |
| // ----------------------------------------------- Public Lifecycle Methods |
| |
| |
| /** |
| * Initialize the endpoint. |
| */ |
| @Override |
| public void bind() throws Exception { |
| |
| serverSock = ServerSocketChannel.open(); |
| socketProperties.setProperties(serverSock.socket()); |
| InetSocketAddress addr = (getAddress()!=null?new InetSocketAddress(getAddress(),getPort()):new InetSocketAddress(getPort())); |
| serverSock.socket().bind(addr,getBacklog()); |
| serverSock.configureBlocking(true); //mimic APR behavior |
| serverSock.socket().setSoTimeout(getSocketProperties().getSoTimeout()); |
| |
| // Initialize thread count defaults for acceptor, poller |
| if (acceptorThreadCount == 0) { |
| // FIXME: Doesn't seem to work that well with multiple accept threads |
| acceptorThreadCount = 1; |
| } |
| if (pollerThreadCount <= 0) { |
| //minimum one poller thread |
| pollerThreadCount = 1; |
| } |
| stopLatch = new CountDownLatch(pollerThreadCount); |
| |
| // Initialize SSL if needed |
| if (isSSLEnabled()) { |
| SSLUtil sslUtil = handler.getSslImplementation().getSSLUtil(this); |
| |
| sslContext = sslUtil.createSSLContext(); |
| sslContext.init(wrap(sslUtil.getKeyManagers()), |
| sslUtil.getTrustManagers(), null); |
| |
| SSLSessionContext sessionContext = |
| sslContext.getServerSessionContext(); |
| if (sessionContext != null) { |
| sslUtil.configureSessionContext(sessionContext); |
| } |
| // Determine which cipher suites and protocols to enable |
| enabledCiphers = sslUtil.getEnableableCiphers(sslContext); |
| enabledProtocols = sslUtil.getEnableableProtocols(sslContext); |
| } |
| |
| if (oomParachute>0) reclaimParachute(true); |
| selectorPool.open(); |
| } |
| |
| public KeyManager[] wrap(KeyManager[] managers) { |
| if (managers==null) return null; |
| KeyManager[] result = new KeyManager[managers.length]; |
| for (int i=0; i<result.length; i++) { |
| if (managers[i] instanceof X509KeyManager && getKeyAlias()!=null) { |
| String keyAlias = getKeyAlias(); |
| // JKS keystores always convert the alias name to lower case |
| if ("jks".equalsIgnoreCase(getKeystoreType())) { |
| keyAlias = keyAlias.toLowerCase(Locale.ENGLISH); |
| } |
| result[i] = new NioX509KeyManager((X509KeyManager) managers[i], keyAlias); |
| } else { |
| result[i] = managers[i]; |
| } |
| } |
| return result; |
| } |
| |
| |
| /** |
| * Start the NIO endpoint, creating acceptor, poller threads. |
| */ |
| @Override |
| public void startInternal() throws Exception { |
| |
| if (!running) { |
| running = true; |
| paused = false; |
| |
| processorCache = new SynchronizedStack<>(SynchronizedStack.DEFAULT_SIZE, |
| socketProperties.getProcessorCache()); |
| eventCache = new SynchronizedStack<>(SynchronizedStack.DEFAULT_SIZE, |
| socketProperties.getEventCache()); |
| nioChannels = new SynchronizedStack<>(SynchronizedStack.DEFAULT_SIZE, |
| socketProperties.getBufferPool()); |
| |
| // Create worker collection |
| if ( getExecutor() == null ) { |
| createExecutor(); |
| } |
| |
| initializeConnectionLatch(); |
| |
| // Start poller threads |
| pollers = new Poller[getPollerThreadCount()]; |
| for (int i=0; i<pollers.length; i++) { |
| pollers[i] = new Poller(); |
| Thread pollerThread = new Thread(pollers[i], getName() + "-ClientPoller-"+i); |
| pollerThread.setPriority(threadPriority); |
| pollerThread.setDaemon(true); |
| pollerThread.start(); |
| } |
| |
| startAcceptorThreads(); |
| } |
| } |
| |
| |
| /** |
| * Stop the endpoint. This will cause all processing threads to stop. |
| */ |
| @Override |
| public void stopInternal() { |
| releaseConnectionLatch(); |
| if (!paused) { |
| pause(); |
| } |
| if (running) { |
| running = false; |
| unlockAccept(); |
| for (int i=0; pollers!=null && i<pollers.length; i++) { |
| if (pollers[i]==null) continue; |
| pollers[i].destroy(); |
| pollers[i] = null; |
| } |
| try { |
| stopLatch.await(selectorTimeout + 100, TimeUnit.MILLISECONDS); |
| } catch (InterruptedException ignore) { |
| } |
| shutdownExecutor(); |
| eventCache.clear(); |
| nioChannels.clear(); |
| processorCache.clear(); |
| } |
| |
| } |
| |
| |
| /** |
| * Deallocate NIO memory pools, and close server socket. |
| */ |
| @Override |
| public void unbind() throws Exception { |
| if (log.isDebugEnabled()) { |
| log.debug("Destroy initiated for "+new InetSocketAddress(getAddress(),getPort())); |
| } |
| if (running) { |
| stop(); |
| } |
| // Close server socket |
| serverSock.socket().close(); |
| serverSock.close(); |
| serverSock = null; |
| sslContext = null; |
| releaseCaches(); |
| selectorPool.close(); |
| if (log.isDebugEnabled()) { |
| log.debug("Destroy completed for "+new InetSocketAddress(getAddress(),getPort())); |
| } |
| } |
| |
| |
| // ------------------------------------------------------ Protected Methods |
| |
| |
| public int getWriteBufSize() { |
| return socketProperties.getTxBufSize(); |
| } |
| |
| public int getReadBufSize() { |
| return socketProperties.getRxBufSize(); |
| } |
| |
| public NioSelectorPool getSelectorPool() { |
| return selectorPool; |
| } |
| |
| @Override |
| public boolean getUseSendfile() { |
| return useSendfile; |
| } |
| |
| public int getOomParachute() { |
| return oomParachute; |
| } |
| |
| public byte[] getOomParachuteData() { |
| return oomParachuteData; |
| } |
| |
| |
| @Override |
| protected AbstractEndpoint.Acceptor createAcceptor() { |
| return new Acceptor(); |
| } |
| |
| |
| /** |
| * Process the specified connection. |
| */ |
| protected boolean setSocketOptions(SocketChannel socket) { |
| // Process the connection |
| try { |
| //disable blocking, APR style, we are gonna be polling it |
| socket.configureBlocking(false); |
| Socket sock = socket.socket(); |
| socketProperties.setProperties(sock); |
| |
| NioChannel channel = nioChannels.pop(); |
| if ( channel == null ) { |
| // SSL setup |
| if (sslContext != null) { |
| SSLEngine engine = createSSLEngine(); |
| int appbufsize = engine.getSession().getApplicationBufferSize(); |
| NioBufferHandler bufhandler = new NioBufferHandler(Math.max(appbufsize,socketProperties.getAppReadBufSize()), |
| Math.max(appbufsize,socketProperties.getAppWriteBufSize()), |
| socketProperties.getDirectBuffer()); |
| channel = new SecureNioChannel(socket, engine, bufhandler, selectorPool); |
| } else { |
| // normal tcp setup |
| NioBufferHandler bufhandler = new NioBufferHandler(socketProperties.getAppReadBufSize(), |
| socketProperties.getAppWriteBufSize(), |
| socketProperties.getDirectBuffer()); |
| |
| channel = new NioChannel(socket, bufhandler); |
| } |
| } else { |
| channel.setIOChannel(socket); |
| if ( channel instanceof SecureNioChannel ) { |
| SSLEngine engine = createSSLEngine(); |
| ((SecureNioChannel)channel).reset(engine); |
| } else { |
| channel.reset(); |
| } |
| } |
| getPoller0().register(channel); |
| } catch (Throwable t) { |
| ExceptionUtils.handleThrowable(t); |
| try { |
| log.error("",t); |
| } catch (Throwable tt) { |
| ExceptionUtils.handleThrowable(tt); |
| } |
| // Tell to close the socket |
| return false; |
| } |
| return true; |
| } |
| |
| protected SSLEngine createSSLEngine() { |
| SSLEngine engine = sslContext.createSSLEngine(); |
| if ("false".equals(getClientAuth())) { |
| engine.setNeedClientAuth(false); |
| engine.setWantClientAuth(false); |
| } else if ("true".equals(getClientAuth()) || "yes".equals(getClientAuth())){ |
| engine.setNeedClientAuth(true); |
| } else if ("want".equals(getClientAuth())) { |
| engine.setWantClientAuth(true); |
| } |
| engine.setUseClientMode(false); |
| engine.setEnabledCipherSuites(enabledCiphers); |
| engine.setEnabledProtocols(enabledProtocols); |
| |
| configureUseServerCipherSuitesOrder(engine); |
| |
| return engine; |
| } |
| |
| |
| /** |
| * Returns true if a worker thread is available for processing. |
| * @return boolean |
| */ |
| protected boolean isWorkerAvailable() { |
| return true; |
| } |
| |
| |
| @Override |
| public void processSocket(SocketWrapper<NioChannel> socketWrapper, |
| SocketStatus socketStatus, boolean dispatch) { |
| processSocket((KeyAttachment) socketWrapper, socketStatus, dispatch); |
| } |
| |
| protected boolean processSocket(KeyAttachment attachment, SocketStatus status, boolean dispatch) { |
| try { |
| if (attachment == null) { |
| return false; |
| } |
| SocketProcessor sc = processorCache.pop(); |
| if ( sc == null ) sc = new SocketProcessor(attachment, status); |
| else sc.reset(attachment, status); |
| Executor executor = getExecutor(); |
| if (dispatch && executor != null) { |
| executor.execute(sc); |
| } else { |
| sc.run(); |
| } |
| } catch (RejectedExecutionException ree) { |
| log.warn(sm.getString("endpoint.executor.fail", attachment.getSocket()), ree); |
| return false; |
| } catch (Throwable t) { |
| ExceptionUtils.handleThrowable(t); |
| // This means we got an OOM or similar creating a thread, or that |
| // the pool and its queue are full |
| log.error(sm.getString("endpoint.process.fail"), t); |
| return false; |
| } |
| return true; |
| } |
| |
| @Override |
| protected Log getLog() { |
| return log; |
| } |
| |
| |
| // --------------------------------------------------- Acceptor Inner Class |
| /** |
| * The background thread that listens for incoming TCP/IP connections and |
| * hands them off to an appropriate processor. |
| */ |
| protected class Acceptor extends AbstractEndpoint.Acceptor { |
| |
| @Override |
| public void run() { |
| |
| int errorDelay = 0; |
| |
| // Loop until we receive a shutdown command |
| while (running) { |
| |
| // Loop if endpoint is paused |
| while (paused && running) { |
| state = AcceptorState.PAUSED; |
| try { |
| Thread.sleep(50); |
| } catch (InterruptedException e) { |
| // Ignore |
| } |
| } |
| |
| if (!running) { |
| break; |
| } |
| state = AcceptorState.RUNNING; |
| |
| try { |
| //if we have reached max connections, wait |
| countUpOrAwaitConnection(); |
| |
| SocketChannel socket = null; |
| try { |
| // Accept the next incoming connection from the server |
| // socket |
| socket = serverSock.accept(); |
| } catch (IOException ioe) { |
| //we didn't get a socket |
| countDownConnection(); |
| // Introduce delay if necessary |
| errorDelay = handleExceptionWithDelay(errorDelay); |
| // re-throw |
| throw ioe; |
| } |
| // Successful accept, reset the error delay |
| errorDelay = 0; |
| |
| // setSocketOptions() will add channel to the poller |
| // if successful |
| if (running && !paused) { |
| if (!setSocketOptions(socket)) { |
| countDownConnection(); |
| closeSocket(socket); |
| } |
| } else { |
| countDownConnection(); |
| closeSocket(socket); |
| } |
| } catch (SocketTimeoutException sx) { |
| // Ignore: Normal condition |
| } catch (IOException x) { |
| if (running) { |
| log.error(sm.getString("endpoint.accept.fail"), x); |
| } |
| } catch (OutOfMemoryError oom) { |
| try { |
| oomParachuteData = null; |
| releaseCaches(); |
| log.error("", oom); |
| }catch ( Throwable oomt ) { |
| try { |
| try { |
| System.err.println(oomParachuteMsg); |
| oomt.printStackTrace(); |
| }catch (Throwable letsHopeWeDontGetHere){ |
| ExceptionUtils.handleThrowable(letsHopeWeDontGetHere); |
| } |
| }catch (Throwable letsHopeWeDontGetHere){ |
| ExceptionUtils.handleThrowable(letsHopeWeDontGetHere); |
| } |
| } |
| } catch (Throwable t) { |
| ExceptionUtils.handleThrowable(t); |
| log.error(sm.getString("endpoint.accept.fail"), t); |
| } |
| } |
| state = AcceptorState.ENDED; |
| } |
| } |
| |
| |
| private void closeSocket(SocketChannel socket) { |
| try { |
| socket.socket().close(); |
| } catch (IOException ioe) { |
| if (log.isDebugEnabled()) { |
| log.debug("", ioe); |
| } |
| } |
| try { |
| socket.close(); |
| } catch (IOException ioe) { |
| if (log.isDebugEnabled()) { |
| log.debug("", ioe); |
| } |
| } |
| } |
| |
| |
| // ----------------------------------------------------- Poller Inner Classes |
| |
| /** |
| * |
| * PollerEvent, cacheable object for poller events to avoid GC |
| */ |
| public static class PollerEvent implements Runnable { |
| |
| private NioChannel socket; |
| private int interestOps; |
| private KeyAttachment key; |
| |
| public PollerEvent(NioChannel ch, KeyAttachment k, int intOps) { |
| reset(ch, k, intOps); |
| } |
| |
| public void reset(NioChannel ch, KeyAttachment k, int intOps) { |
| socket = ch; |
| interestOps = intOps; |
| key = k; |
| } |
| |
| public void reset() { |
| reset(null, null, 0); |
| } |
| |
| @Override |
| public void run() { |
| if ( interestOps == OP_REGISTER ) { |
| try { |
| socket.getIOChannel().register(socket.getPoller().getSelector(), SelectionKey.OP_READ, key); |
| } catch (Exception x) { |
| log.error("", x); |
| } |
| } else { |
| final SelectionKey key = socket.getIOChannel().keyFor(socket.getPoller().getSelector()); |
| try { |
| if (key == null) { |
| // The key was cancelled (e.g. due to socket closure) |
| // and removed from the selector while it was being |
| // processed. Count down the connections at this point |
| // since it won't have been counted down when the socket |
| // closed. |
| socket.getPoller().getEndpoint().countDownConnection(); |
| } else { |
| final KeyAttachment att = (KeyAttachment) key.attachment(); |
| if ( att!=null ) { |
| att.access();//to prevent timeout |
| //we are registering the key to start with, reset the fairness counter. |
| int ops = key.interestOps() | interestOps; |
| att.interestOps(ops); |
| key.interestOps(ops); |
| } else { |
| socket.getPoller().cancelledKey(key, SocketStatus.ERROR); |
| } |
| } |
| } catch (CancelledKeyException ckx) { |
| try { |
| socket.getPoller().cancelledKey(key, SocketStatus.DISCONNECT); |
| } catch (Exception ignore) {} |
| } |
| }//end if |
| }//run |
| |
| @Override |
| public String toString() { |
| return super.toString()+"[intOps="+this.interestOps+"]"; |
| } |
| } |
| |
| /** |
| * Poller class. |
| */ |
| public class Poller implements Runnable { |
| |
| private Selector selector; |
| private final SynchronizedQueue<PollerEvent> events = |
| new SynchronizedQueue<>(); |
| |
| private volatile boolean close = false; |
| private long nextExpiration = 0;//optimize expiration handling |
| |
| private AtomicLong wakeupCounter = new AtomicLong(0); |
| |
| private volatile int keyCount = 0; |
| |
| public Poller() throws IOException { |
| synchronized (Selector.class) { |
| // Selector.open() isn't thread safe |
| // http://bugs.sun.com/view_bug.do?bug_id=6427854 |
| // Affects 1.6.0_29, fixed in 1.7.0_01 |
| this.selector = Selector.open(); |
| } |
| } |
| |
| public int getKeyCount() { return keyCount; } |
| |
| public Selector getSelector() { return selector;} |
| |
| NioEndpoint getEndpoint() { |
| return NioEndpoint.this; |
| } |
| |
| /** |
| * Destroy the poller. |
| */ |
| protected void destroy() { |
| // Wait for polltime before doing anything, so that the poller threads |
| // exit, otherwise parallel closure of sockets which are still |
| // in the poller can cause problems |
| close = true; |
| selector.wakeup(); |
| } |
| |
| private void addEvent(PollerEvent event) { |
| events.offer(event); |
| if ( wakeupCounter.incrementAndGet() == 0 ) selector.wakeup(); |
| } |
| |
| /** |
| * Add specified socket and associated pool to the poller. The socket will |
| * be added to a temporary array, and polled first after a maximum amount |
| * of time equal to pollTime (in most cases, latency will be much lower, |
| * however). |
| * |
| * @param socket to add to the poller |
| */ |
| public void add(final NioChannel socket) { |
| add(socket,SelectionKey.OP_READ); |
| } |
| |
| public void add(final NioChannel socket, final int interestOps) { |
| PollerEvent r = eventCache.pop(); |
| if ( r==null) r = new PollerEvent(socket,null,interestOps); |
| else r.reset(socket,null,interestOps); |
| addEvent(r); |
| if (close) { |
| NioEndpoint.KeyAttachment ka = (NioEndpoint.KeyAttachment)socket.getAttachment(); |
| processSocket(ka, SocketStatus.STOP, false); |
| } |
| } |
| |
| /** |
| * Processes events in the event queue of the Poller. |
| * |
| * @return <code>true</code> if some events were processed, |
| * <code>false</code> if queue was empty |
| */ |
| public boolean events() { |
| boolean result = false; |
| |
| PollerEvent pe = null; |
| for (int i = 0, size = events.size(); i < size && (pe = events.poll()) != null; i++ ) { |
| result = true; |
| try { |
| pe.run(); |
| pe.reset(); |
| if (running && !paused) { |
| eventCache.push(pe); |
| } |
| } catch ( Throwable x ) { |
| log.error("",x); |
| } |
| } |
| |
| return result; |
| } |
| |
| /** |
| * Registers a newly created socket with the poller. |
| * |
| * @param socket The newly created socket |
| */ |
| public void register(final NioChannel socket) { |
| socket.setPoller(this); |
| KeyAttachment ka = new KeyAttachment(socket); |
| ka.setPoller(this); |
| ka.setTimeout(getSocketProperties().getSoTimeout()); |
| ka.setKeepAliveLeft(NioEndpoint.this.getMaxKeepAliveRequests()); |
| ka.setSecure(isSSLEnabled()); |
| PollerEvent r = eventCache.pop(); |
| ka.interestOps(SelectionKey.OP_READ);//this is what OP_REGISTER turns into. |
| if ( r==null) r = new PollerEvent(socket,ka,OP_REGISTER); |
| else r.reset(socket,ka,OP_REGISTER); |
| addEvent(r); |
| } |
| |
| public KeyAttachment cancelledKey(SelectionKey key, SocketStatus status) { |
| KeyAttachment ka = null; |
| try { |
| if ( key == null ) return null;//nothing to do |
| ka = (KeyAttachment) key.attachment(); |
| if (ka != null && ka.isComet() && status != null) { |
| ka.setComet(false);//to avoid a loop |
| if (status == SocketStatus.TIMEOUT ) { |
| if (processSocket(ka, status, true)) { |
| return null; // don't close on comet timeout |
| } |
| } else { |
| // Don't dispatch if the lines below are cancelling the key |
| processSocket(ka, status, false); |
| } |
| } |
| ka = (KeyAttachment) key.attach(null); |
| if (ka!=null) handler.release(ka); |
| else handler.release((SocketChannel)key.channel()); |
| if (key.isValid()) key.cancel(); |
| // If it is available, close the NioChannel first which should |
| // in turn close the underlying SocketChannel. The NioChannel |
| // needs to be closed first, if available, to ensure that TLS |
| // connections are shut down cleanly. |
| if (ka != null) { |
| try { |
| ka.getSocket().close(true); |
| } catch (Exception e){ |
| if (log.isDebugEnabled()) { |
| log.debug(sm.getString( |
| "endpoint.debug.socketCloseFail"), e); |
| } |
| } |
| } |
| // The SocketChannel is also available via the SelectionKey. If |
| // it hasn't been closed in the block above, close it now. |
| if (key.channel().isOpen()) { |
| try { |
| key.channel().close(); |
| } catch (Exception e) { |
| if (log.isDebugEnabled()) { |
| log.debug(sm.getString( |
| "endpoint.debug.channelCloseFail"), e); |
| } |
| } |
| } |
| try { |
| if (ka != null && ka.getSendfileData() != null |
| && ka.getSendfileData().fchannel != null |
| && ka.getSendfileData().fchannel.isOpen()) { |
| ka.getSendfileData().fchannel.close(); |
| } |
| } catch (Exception ignore) { |
| } |
| if (ka != null) { |
| countDownConnection(); |
| } |
| } catch (Throwable e) { |
| ExceptionUtils.handleThrowable(e); |
| if (log.isDebugEnabled()) log.error("",e); |
| } |
| return ka; |
| } |
| /** |
| * The background thread that listens for incoming TCP/IP connections and |
| * hands them off to an appropriate processor. |
| */ |
| @Override |
| public void run() { |
| // Loop until destroy() is called |
| while (true) { |
| try { |
| // Loop if endpoint is paused |
| while (paused && (!close) ) { |
| try { |
| Thread.sleep(100); |
| } catch (InterruptedException e) { |
| // Ignore |
| } |
| } |
| |
| boolean hasEvents = false; |
| |
| // Time to terminate? |
| if (close) { |
| events(); |
| timeout(0, false); |
| try { |
| selector.close(); |
| } catch (IOException ioe) { |
| log.error(sm.getString( |
| "endpoint.nio.selectorCloseFail"), ioe); |
| } |
| break; |
| } else { |
| hasEvents = events(); |
| } |
| try { |
| if ( !close ) { |
| if (wakeupCounter.getAndSet(-1) > 0) { |
| //if we are here, means we have other stuff to do |
| //do a non blocking select |
| keyCount = selector.selectNow(); |
| } else { |
| keyCount = selector.select(selectorTimeout); |
| } |
| wakeupCounter.set(0); |
| } |
| if (close) { |
| events(); |
| timeout(0, false); |
| try { |
| selector.close(); |
| } catch (IOException ioe) { |
| log.error(sm.getString( |
| "endpoint.nio.selectorCloseFail"), ioe); |
| } |
| break; |
| } |
| } catch (Throwable x) { |
| ExceptionUtils.handleThrowable(x); |
| log.error("",x); |
| continue; |
| } |
| //either we timed out or we woke up, process events first |
| if ( keyCount == 0 ) hasEvents = (hasEvents | events()); |
| |
| Iterator<SelectionKey> iterator = |
| keyCount > 0 ? selector.selectedKeys().iterator() : null; |
| // Walk through the collection of ready keys and dispatch |
| // any active event. |
| while (iterator != null && iterator.hasNext()) { |
| SelectionKey sk = iterator.next(); |
| KeyAttachment attachment = (KeyAttachment)sk.attachment(); |
| // Attachment may be null if another thread has called |
| // cancelledKey() |
| if (attachment == null) { |
| iterator.remove(); |
| } else { |
| attachment.access(); |
| iterator.remove(); |
| processKey(sk, attachment); |
| } |
| }//while |
| |
| //process timeouts |
| timeout(keyCount,hasEvents); |
| if ( oomParachute > 0 && oomParachuteData == null ) checkParachute(); |
| } catch (OutOfMemoryError oom) { |
| try { |
| oomParachuteData = null; |
| releaseCaches(); |
| log.error("", oom); |
| }catch ( Throwable oomt ) { |
| try { |
| System.err.println(oomParachuteMsg); |
| oomt.printStackTrace(); |
| }catch (Throwable letsHopeWeDontGetHere){ |
| ExceptionUtils.handleThrowable(letsHopeWeDontGetHere); |
| } |
| } |
| } |
| }//while |
| |
| stopLatch.countDown(); |
| } |
| |
| protected boolean processKey(SelectionKey sk, KeyAttachment attachment) { |
| boolean result = true; |
| try { |
| if ( close ) { |
| cancelledKey(sk, SocketStatus.STOP); |
| } else if ( sk.isValid() && attachment != null ) { |
| attachment.access();//make sure we don't time out valid sockets |
| if (sk.isReadable() || sk.isWritable() ) { |
| if ( attachment.getSendfileData() != null ) { |
| processSendfile(sk,attachment, false); |
| } else { |
| if ( isWorkerAvailable() ) { |
| unreg(sk, attachment, sk.readyOps()); |
| boolean closeSocket = false; |
| // Read goes before write |
| if (sk.isReadable()) { |
| if (!processSocket(attachment, SocketStatus.OPEN_READ, true)) { |
| closeSocket = true; |
| } |
| } |
| if (!closeSocket && sk.isWritable()) { |
| if (!processSocket(attachment, SocketStatus.OPEN_WRITE, true)) { |
| closeSocket = true; |
| } |
| } |
| if (closeSocket) { |
| cancelledKey(sk,SocketStatus.DISCONNECT); |
| } |
| } else { |
| result = false; |
| } |
| } |
| } |
| } else { |
| //invalid key |
| cancelledKey(sk, SocketStatus.ERROR); |
| } |
| } catch ( CancelledKeyException ckx ) { |
| cancelledKey(sk, SocketStatus.ERROR); |
| } catch (Throwable t) { |
| ExceptionUtils.handleThrowable(t); |
| log.error("",t); |
| } |
| return result; |
| } |
| |
| public SendfileState processSendfile(SelectionKey sk, KeyAttachment attachment, |
| boolean calledByProcessor) { |
| NioChannel sc = null; |
| try { |
| unreg(sk, attachment, sk.readyOps()); |
| SendfileData sd = attachment.getSendfileData(); |
| |
| if (log.isTraceEnabled()) { |
| log.trace("Processing send file for: " + sd.fileName); |
| } |
| |
| if (sd.fchannel == null) { |
| // Setup the file channel |
| File f = new File(sd.fileName); |
| @SuppressWarnings("resource") // Closed when channel is closed |
| FileInputStream fis = new FileInputStream(f); |
| sd.fchannel = fis.getChannel(); |
| } |
| |
| // Configure output channel |
| sc = attachment.getSocket(); |
| // TLS/SSL channel is slightly different |
| WritableByteChannel wc = ((sc instanceof SecureNioChannel)?sc:sc.getIOChannel()); |
| |
| // We still have data in the buffer |
| if (sc.getOutboundRemaining()>0) { |
| if (sc.flushOutbound()) { |
| attachment.access(); |
| } |
| } else { |
| long written = sd.fchannel.transferTo(sd.pos,sd.length,wc); |
| if (written > 0) { |
| sd.pos += written; |
| sd.length -= written; |
| attachment.access(); |
| } else { |
| // Unusual not to be able to transfer any bytes |
| // Check the length was set correctly |
| if (sd.fchannel.size() <= sd.pos) { |
| throw new IOException("Sendfile configured to " + |
| "send more data than was available"); |
| } |
| } |
| } |
| if (sd.length <= 0 && sc.getOutboundRemaining()<=0) { |
| if (log.isDebugEnabled()) { |
| log.debug("Send file complete for: "+sd.fileName); |
| } |
| attachment.setSendfileData(null); |
| try { |
| sd.fchannel.close(); |
| } catch (Exception ignore) { |
| } |
| // For calls from outside the Poller, the caller is |
| // responsible for registering the socket for the |
| // appropriate event(s) if sendfile completes. |
| if (!calledByProcessor) { |
| switch (sd.keepAliveState) { |
| case NONE: { |
| if (log.isDebugEnabled()) { |
| log.debug("Send file connection is being closed"); |
| } |
| cancelledKey(sk,SocketStatus.STOP); |
| break; |
| } |
| case PIPELINED: { |
| if (log.isDebugEnabled()) { |
| log.debug("Connection is keep alive, processing pipe-lined data"); |
| } |
| if (!processSocket(attachment, SocketStatus.OPEN_READ, true)) { |
| cancelledKey(sk, SocketStatus.DISCONNECT); |
| } |
| break; |
| } |
| case OPEN: { |
| if (log.isDebugEnabled()) { |
| log.debug("Connection is keep alive, registering back for OP_READ"); |
| } |
| reg(sk, attachment, SelectionKey.OP_READ); |
| break; |
| } |
| } |
| } |
| return SendfileState.DONE; |
| } else { |
| if (log.isDebugEnabled()) { |
| log.debug("OP_WRITE for sendfile: " + sd.fileName); |
| } |
| if (calledByProcessor) { |
| add(attachment.getSocket(),SelectionKey.OP_WRITE); |
| } else { |
| reg(sk,attachment,SelectionKey.OP_WRITE); |
| } |
| return SendfileState.PENDING; |
| } |
| }catch ( IOException x ) { |
| if ( log.isDebugEnabled() ) log.debug("Unable to complete sendfile request:", x); |
| if (!calledByProcessor) { |
| cancelledKey(sk,SocketStatus.ERROR); |
| } |
| return SendfileState.ERROR; |
| }catch ( Throwable t ) { |
| log.error("",t); |
| if (!calledByProcessor) { |
| cancelledKey(sk, SocketStatus.ERROR); |
| } |
| return SendfileState.ERROR; |
| } |
| } |
| |
| protected void unreg(SelectionKey sk, KeyAttachment attachment, int readyOps) { |
| //this is a must, so that we don't have multiple threads messing with the socket |
| reg(sk,attachment,sk.interestOps()& (~readyOps)); |
| } |
| |
| protected void reg(SelectionKey sk, KeyAttachment attachment, int intops) { |
| sk.interestOps(intops); |
| attachment.interestOps(intops); |
| } |
| |
| protected void timeout(int keyCount, boolean hasEvents) { |
| long now = System.currentTimeMillis(); |
| // This method is called on every loop of the Poller. Don't process |
| // timeouts on every loop of the Poller since that would create too |
| // much load and timeouts can afford to wait a few seconds. |
| // However, do process timeouts if any of the following are true: |
| // - the selector simply timed out (suggests there isn't much load) |
| // - the nextExpiration time has passed |
| // - the server socket is being closed |
| if (nextExpiration > 0 && (keyCount > 0 || hasEvents) && (now < nextExpiration) && !close) { |
| return; |
| } |
| //timeout |
| Set<SelectionKey> keys = selector.keys(); |
| int keycount = 0; |
| try { |
| for (Iterator<SelectionKey> iter = keys.iterator(); iter.hasNext();) { |
| SelectionKey key = iter.next(); |
| keycount++; |
| try { |
| KeyAttachment ka = (KeyAttachment) key.attachment(); |
| if ( ka == null ) { |
| cancelledKey(key, SocketStatus.ERROR); //we don't support any keys without attachments |
| } else if ((ka.interestOps()&SelectionKey.OP_READ) == SelectionKey.OP_READ || |
| (ka.interestOps()&SelectionKey.OP_WRITE) == SelectionKey.OP_WRITE) { |
| //only timeout sockets that we are waiting for a read from |
| long delta = now - ka.getLastAccess(); |
| long timeout = ka.getTimeout(); |
| boolean isTimedout = timeout > 0 && delta > timeout; |
| if ( close ) { |
| key.interestOps(0); |
| ka.interestOps(0); //avoid duplicate stop calls |
| processKey(key,ka); |
| } else if (isTimedout) { |
| key.interestOps(0); |
| ka.interestOps(0); //avoid duplicate timeout calls |
| cancelledKey(key, SocketStatus.TIMEOUT); |
| } |
| } else if (ka.isAsync() || ka.isComet()) { |
| if (close) { |
| key.interestOps(0); |
| ka.interestOps(0); //avoid duplicate stop calls |
| processKey(key,ka); |
| } else if (!ka.isAsync() || ka.getTimeout() > 0) { |
| // Async requests with a timeout of 0 or less never timeout |
| long delta = now - ka.getLastAccess(); |
| long timeout = (ka.getTimeout()==-1)?((long) socketProperties.getSoTimeout()):(ka.getTimeout()); |
| boolean isTimedout = delta > timeout; |
| if (isTimedout) { |
| // Prevent subsequent timeouts if the timeout event takes a while to process |
| ka.access(Long.MAX_VALUE); |
| processSocket(ka, SocketStatus.TIMEOUT, true); |
| } |
| } |
| }//end if |
| } catch ( CancelledKeyException ckx ) { |
| cancelledKey(key, SocketStatus.ERROR); |
| } |
| }//for |
| } catch (ConcurrentModificationException cme) { |
| // See https://bz.apache.org/bugzilla/show_bug.cgi?id=57943 |
| log.warn(sm.getString("endpoint.nio.timeoutCme"), cme); |
| } |
| long prevExp = nextExpiration; //for logging purposes only |
| nextExpiration = System.currentTimeMillis() + |
| socketProperties.getTimeoutInterval(); |
| if (log.isTraceEnabled()) { |
| log.trace("timeout completed: keys processed=" + keycount + |
| "; now=" + now + "; nextExpiration=" + prevExp + |
| "; keyCount=" + keyCount + "; hasEvents=" + hasEvents + |
| "; eval=" + ((now < prevExp) && (keyCount>0 || hasEvents) && (!close) )); |
| } |
| |
| } |
| } |
| |
| // ----------------------------------------------------- Key Attachment Class |
| public static class KeyAttachment extends SocketWrapper<NioChannel> { |
| |
| public KeyAttachment(NioChannel channel) { |
| super(channel); |
| } |
| |
| public Poller getPoller() { return poller;} |
| public void setPoller(Poller poller){this.poller = poller;} |
| @Deprecated // Unused. NO-OP. Will be removed in Tomcat 8.5.x |
| public void setCometNotify(@SuppressWarnings("unused") boolean notify) { /* NO-OP */ } |
| @Deprecated // Unused. Always returns false. Will be removed in Tomcat 8.5.x |
| public boolean getCometNotify() { return false; } |
| public int interestOps() { return interestOps;} |
| public int interestOps(int ops) { this.interestOps = ops; return ops; } |
| public CountDownLatch getReadLatch() { return readLatch; } |
| public CountDownLatch getWriteLatch() { return writeLatch; } |
| protected CountDownLatch resetLatch(CountDownLatch latch) { |
| if ( latch==null || latch.getCount() == 0 ) return null; |
| else throw new IllegalStateException("Latch must be at count 0"); |
| } |
| public void resetReadLatch() { readLatch = resetLatch(readLatch); } |
| public void resetWriteLatch() { writeLatch = resetLatch(writeLatch); } |
| |
| protected CountDownLatch startLatch(CountDownLatch latch, int cnt) { |
| if ( latch == null || latch.getCount() == 0 ) { |
| return new CountDownLatch(cnt); |
| } |
| else throw new IllegalStateException("Latch must be at count 0 or null."); |
| } |
| public void startReadLatch(int cnt) { readLatch = startLatch(readLatch,cnt);} |
| public void startWriteLatch(int cnt) { writeLatch = startLatch(writeLatch,cnt);} |
| |
| protected void awaitLatch(CountDownLatch latch, long timeout, TimeUnit unit) throws InterruptedException { |
| if ( latch == null ) throw new IllegalStateException("Latch cannot be null"); |
| // Note: While the return value is ignored if the latch does time |
| // out, logic further up the call stack will trigger a |
| // SocketTimeoutException |
| latch.await(timeout,unit); |
| } |
| public void awaitReadLatch(long timeout, TimeUnit unit) throws InterruptedException { awaitLatch(readLatch,timeout,unit);} |
| public void awaitWriteLatch(long timeout, TimeUnit unit) throws InterruptedException { awaitLatch(writeLatch,timeout,unit);} |
| |
| public void setSendfileData(SendfileData sf) { this.sendfileData = sf;} |
| public SendfileData getSendfileData() { return this.sendfileData;} |
| |
| public void setWriteTimeout(long writeTimeout) { |
| this.writeTimeout = writeTimeout; |
| } |
| public long getWriteTimeout() {return this.writeTimeout;} |
| |
| private Poller poller = null; |
| private int interestOps = 0; |
| private CountDownLatch readLatch = null; |
| private CountDownLatch writeLatch = null; |
| private volatile SendfileData sendfileData = null; |
| private long writeTimeout = -1; |
| |
| } |
| |
| // ------------------------------------------------ Application Buffer Handler |
| public static class NioBufferHandler implements ApplicationBufferHandler { |
| private ByteBuffer readbuf = null; |
| private ByteBuffer writebuf = null; |
| |
| public NioBufferHandler(int readsize, int writesize, boolean direct) { |
| if ( direct ) { |
| readbuf = ByteBuffer.allocateDirect(readsize); |
| writebuf = ByteBuffer.allocateDirect(writesize); |
| }else { |
| readbuf = ByteBuffer.allocate(readsize); |
| writebuf = ByteBuffer.allocate(writesize); |
| } |
| } |
| |
| @Override |
| public ByteBuffer expand(ByteBuffer buffer, int remaining) {return buffer;} |
| @Override |
| public ByteBuffer getReadBuffer() {return readbuf;} |
| @Override |
| public ByteBuffer getWriteBuffer() {return writebuf;} |
| |
| } |
| |
| // ------------------------------------------------ Handler Inner Interface |
| |
| |
| /** |
| * Bare bones interface used for socket processing. Per thread data is to be |
| * stored in the ThreadWithAttributes extra folders, or alternately in |
| * thread local fields. |
| */ |
| public interface Handler extends AbstractEndpoint.Handler { |
| public SocketState process(SocketWrapper<NioChannel> socket, |
| SocketStatus status); |
| public void release(SocketWrapper<NioChannel> socket); |
| public void release(SocketChannel socket); |
| public SSLImplementation getSslImplementation(); |
| } |
| |
| |
| // ---------------------------------------------- SocketProcessor Inner Class |
| /** |
| * This class is the equivalent of the Worker, but will simply use in an |
| * external Executor thread pool. |
| */ |
| protected class SocketProcessor implements Runnable { |
| |
| private KeyAttachment ka = null; |
| private SocketStatus status = null; |
| |
| public SocketProcessor(KeyAttachment ka, SocketStatus status) { |
| reset(ka, status); |
| } |
| |
| public void reset(KeyAttachment ka, SocketStatus status) { |
| this.ka = ka; |
| this.status = status; |
| } |
| |
| @Override |
| public void run() { |
| NioChannel socket = ka.getSocket(); |
| |
| // Upgraded connections need to allow multiple threads to access the |
| // connection at the same time to enable blocking IO to be used when |
| // NIO has been configured |
| if (ka.isUpgraded() && SocketStatus.OPEN_WRITE == status) { |
| synchronized (ka.getWriteThreadLock()) { |
| doRun(); |
| } |
| } else { |
| synchronized (socket) { |
| doRun(); |
| } |
| } |
| } |
| |
| private void doRun() { |
| NioChannel socket = ka.getSocket(); |
| SelectionKey key = socket.getIOChannel().keyFor(socket.getPoller().getSelector()); |
| |
| try { |
| int handshake = -1; |
| |
| try { |
| if (key != null) { |
| // For STOP there is no point trying to handshake as the |
| // Poller has been stopped. |
| if (socket.isHandshakeComplete() || |
| status == SocketStatus.STOP) { |
| handshake = 0; |
| } else { |
| handshake = socket.handshake( |
| key.isReadable(), key.isWritable()); |
| // The handshake process reads/writes from/to the |
| // socket. status may therefore be OPEN_WRITE once |
| // the handshake completes. However, the handshake |
| // happens when the socket is opened so the status |
| // must always be OPEN_READ after it completes. It |
| // is OK to always set this as it is only used if |
| // the handshake completes. |
| status = SocketStatus.OPEN_READ; |
| } |
| } |
| } catch (IOException x) { |
| handshake = -1; |
| if (log.isDebugEnabled()) log.debug("Error during SSL handshake",x); |
| } catch (CancelledKeyException ckx) { |
| handshake = -1; |
| } |
| if (handshake == 0) { |
| SocketState state = SocketState.OPEN; |
| // Process the request from this socket |
| if (status == null) { |
| state = handler.process(ka, SocketStatus.OPEN_READ); |
| } else { |
| state = handler.process(ka, status); |
| } |
| if (state == SocketState.CLOSED) { |
| close(socket, key, SocketStatus.ERROR); |
| } |
| } else if (handshake == -1 ) { |
| close(socket, key, SocketStatus.DISCONNECT); |
| } else { |
| ka.getPoller().add(socket,handshake); |
| } |
| } catch (CancelledKeyException cx) { |
| socket.getPoller().cancelledKey(key, null); |
| } catch (OutOfMemoryError oom) { |
| try { |
| oomParachuteData = null; |
| log.error("", oom); |
| socket.getPoller().cancelledKey(key,SocketStatus.ERROR); |
| releaseCaches(); |
| } catch (Throwable oomt) { |
| try { |
| System.err.println(oomParachuteMsg); |
| oomt.printStackTrace(); |
| } catch (Throwable letsHopeWeDontGetHere){ |
| ExceptionUtils.handleThrowable(letsHopeWeDontGetHere); |
| } |
| } |
| } catch (VirtualMachineError vme) { |
| ExceptionUtils.handleThrowable(vme); |
| } catch (Throwable t) { |
| log.error("", t); |
| socket.getPoller().cancelledKey(key,SocketStatus.ERROR); |
| } finally { |
| ka = null; |
| status = null; |
| //return to cache |
| if (running && !paused) { |
| processorCache.push(this); |
| } |
| } |
| } |
| |
| private void close(NioChannel socket, SelectionKey key, SocketStatus socketStatus) { |
| // Close socket and pool |
| try { |
| ka.setComet(false); |
| if (socket.getPoller().cancelledKey(key, socketStatus) != null) { |
| // SocketWrapper (attachment) was removed from the |
| // key - recycle the key. This can only happen once |
| // per attempted closure so it is used to determine |
| // whether or not to return the key to the cache. |
| // We do NOT want to do this more than once - see BZ |
| // 57340 / 57943. |
| if (running && !paused) { |
| nioChannels.push(socket); |
| } |
| } |
| } catch (Exception x) { |
| log.error("",x); |
| } |
| } |
| } |
| |
| // ----------------------------------------------- SendfileData Inner Class |
| /** |
| * SendfileData class. |
| */ |
| public static class SendfileData { |
| // File |
| public volatile String fileName; |
| public volatile FileChannel fchannel; |
| public volatile long pos; |
| public volatile long length; |
| // KeepAlive flag |
| public SendfileKeepAliveState keepAliveState = SendfileKeepAliveState.NONE; |
| } |
| } |
