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/*
* 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.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.Iterator;
import java.util.Set;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.CountDownLatch;
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.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:
*
*
Socket acceptor thread
*
Socket poller thread
*
Worker threads pool
*
*
* When switching to Java 5, there's an opportunity to use the virtual
* machine's thread pool.
*
* @author Mladen Turk
* @author Remy Maucherat
* @author Filip Hanik
*/
public class NioEndpoint extends AbstractEndpoint {
// -------------------------------------------------------------- Constants
private static final Log log = LogFactory.getLog(NioEndpoint.class);
public static final int OP_REGISTER = 0x100; //register interest op
public static final int OP_CALLBACK = 0x200; //callback interest op
// ----------------------------------------------------------------- Fields
protected NioSelectorPool selectorPool = new NioSelectorPool();
/**
* Server socket "pointer".
*/
protected ServerSocketChannel serverSock = null;
/**
* use send file
*/
protected boolean useSendfile = true;
/**
* The size of the OOM parachute.
*/
protected 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.
*/
protected byte[] oomParachuteData = null;
/**
* Make sure this string has already been allocated
*/
protected static final String oomParachuteMsg =
"SEVERE:Memory usage is low, parachute is non existent, your system may start failing.";
/**
* Keep track of OOM warning messages.
*/
long lastParachuteCheck = System.currentTimeMillis();
/**
*
*/
protected volatile CountDownLatch stopLatch = null;
/**
* Cache for SocketProcessor objects
*/
protected ConcurrentLinkedQueue processorCache = new ConcurrentLinkedQueue() {
private static final long serialVersionUID = 1L;
protected AtomicInteger size = new AtomicInteger(0);
@Override
public boolean offer(SocketProcessor sc) {
sc.reset(null,null);
boolean offer = socketProperties.getProcessorCache()==-1?true:size.get() keyCache = new ConcurrentLinkedQueue() {
private static final long serialVersionUID = 1L;
protected AtomicInteger size = new AtomicInteger(0);
@Override
public boolean offer(KeyAttachment ka) {
ka.reset();
boolean offer = socketProperties.getKeyCache()==-1?true:size.get() eventCache = new ConcurrentLinkedQueue() {
private static final long serialVersionUID = 1L;
protected AtomicInteger size = new AtomicInteger(0);
@Override
public boolean offer(PollerEvent pe) {
pe.reset();
boolean offer = socketProperties.getEventCache()==-1?true:size.get() nioChannels = new ConcurrentLinkedQueue() {
private static final long serialVersionUID = 1L;
protected AtomicInteger size = new AtomicInteger(0);
protected AtomicInteger bytes = new AtomicInteger(0);
@Override
public boolean offer(NioChannel socket) {
boolean offer = socketProperties.getBufferPool()==-1?true:size.get()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.keyCache.clear();
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; i0) 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 0 ) engine.setEnabledCipherSuites(getCiphersArray());
if ( getSslEnabledProtocolsArray().length > 0 ) engine.setEnabledProtocols(getSslEnabledProtocolsArray());
return engine;
}
/**
* Returns true if a worker thread is available for processing.
* @return boolean
*/
protected boolean isWorkerAvailable() {
return true;
}
public boolean processSocket(NioChannel socket, SocketStatus status, boolean dispatch) {
try {
KeyAttachment attachment = (KeyAttachment)socket.getAttachment(false);
attachment.setCometNotify(false); //will get reset upon next reg
SocketProcessor sc = processorCache.poll();
if ( sc == null ) sc = new SocketProcessor(socket,status);
else sc.reset(socket,status);
if ( dispatch && getExecutor()!=null ) getExecutor().execute(sc);
else sc.run();
} catch (RejectedExecutionException rx) {
log.warn("Socket processing request was rejected for:"+socket,rx);
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
/**
* Server socket acceptor thread.
*/
protected class Acceptor implements Runnable {
/**
* The background thread that listens for incoming TCP/IP connections and
* hands them off to an appropriate processor.
*/
@Override
public void run() {
int errorDelay = 0;
// Loop until we receive a shutdown command
while (running) {
// Loop if endpoint is paused
while (paused && running) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// Ignore
}
}
if (!running) {
break;
}
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) {
// Introduce delay if necessary
errorDelay = handleExceptionWithDelay(errorDelay);
// re-throw
throw ioe;
}
// Successful accept, reset the error delay
errorDelay = 0;
// Hand this socket off to an appropriate processor
//TODO FIXME - this is currently a blocking call, meaning we will be blocking
//further accepts until there is a thread available.
if ( running && (!paused) && socket != null ) {
// setSocketOptions() will add channel to the poller
// if successful
if (!setSocketOptions(socket)) {
try {
socket.socket().close();
socket.close();
} catch (IOException ix) {
if (log.isDebugEnabled())
log.debug("", ix);
}
}
}
} catch (SocketTimeoutException sx) {
//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);
}
}//while
}//run
}
// ----------------------------------------------------- Poller Inner Classes
/**
*
* PollerEvent, cacheable object for poller events to avoid GC
*/
public static class PollerEvent implements Runnable {
protected NioChannel socket;
protected int interestOps;
protected 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 {
boolean cancel = false;
if (key != null) {
final KeyAttachment att = (KeyAttachment) key.attachment();
if ( att!=null ) {
//handle callback flag
if (att.getComet() && (interestOps & OP_CALLBACK) == OP_CALLBACK ) {
att.setCometNotify(true);
} else {
att.setCometNotify(false);
}
interestOps = (interestOps & (~OP_CALLBACK));//remove the callback flag
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 {
cancel = true;
}
} else {
cancel = true;
}
if ( cancel ) socket.getPoller().cancelledKey(key,SocketStatus.ERROR,false);
}catch (CancelledKeyException ckx) {
try {
socket.getPoller().cancelledKey(key,SocketStatus.DISCONNECT,true);
}catch (Exception ignore) {}
}
}//end if
}//run
@Override
public String toString() {
return super.toString()+"[intOps="+this.interestOps+"]";
}
}
/**
* Poller class.
*/
public class Poller implements Runnable {
protected Selector selector;
protected ConcurrentLinkedQueue events = new ConcurrentLinkedQueue();
protected volatile boolean close = false;
protected long nextExpiration = 0;//optimize expiration handling
protected AtomicLong wakeupCounter = new AtomicLong(0l);
protected volatile int keyCount = 0;
public Poller() throws IOException {
this.selector = Selector.open();
}
public int getKeyCount() { return keyCount; }
public Selector getSelector() { return selector;}
/**
* 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;
events.clear();
selector.wakeup();
}
public void addEvent(Runnable event) {
events.offer(event);
if ( wakeupCounter.incrementAndGet() == 0 ) selector.wakeup();
}
public void cometInterest(NioChannel socket) {
KeyAttachment att = (KeyAttachment)socket.getAttachment(false);
add(socket,att.getCometOps());
if ( (att.getCometOps()&OP_CALLBACK) == OP_CALLBACK ) {
nextExpiration = 0; //force the check for faster callback
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.poll();
if ( r==null) r = new PollerEvent(socket,null,interestOps);
else r.reset(socket,null,interestOps);
addEvent(r);
}
public boolean events() {
boolean result = false;
Runnable r = null;
result = (events.size() > 0);
while ( (r = events.poll()) != null ) {
try {
r.run();
if ( r instanceof PollerEvent ) {
((PollerEvent)r).reset();
eventCache.offer((PollerEvent)r);
}
} catch ( Throwable x ) {
log.error("",x);
}
}
return result;
}
public void register(final NioChannel socket)
{
socket.setPoller(this);
KeyAttachment key = keyCache.poll();
final KeyAttachment ka = key!=null?key:new KeyAttachment(socket);
ka.reset(this,socket,getSocketProperties().getSoTimeout());
ka.setKeepAliveLeft(NioEndpoint.this.getMaxKeepAliveRequests());
PollerEvent r = eventCache.poll();
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 void cancelledKey(SelectionKey key, SocketStatus status, boolean dispatch) {
try {
if ( key == null ) return;//nothing to do
KeyAttachment ka = (KeyAttachment) key.attachment();
if (ka != null && ka.getComet() && status != null) {
//the comet event takes care of clean up
//processSocket(ka.getChannel(), status, dispatch);
ka.setComet(false);//to avoid a loop
if (status == SocketStatus.TIMEOUT ) {
if (processSocket(ka.getChannel(), status, true)) {
return; // don't close on comet timeout
}
} else {
processSocket(ka.getChannel(), status, false); //don't dispatch if the lines below are cancelling the key
}
}
key.attach(null);
if (ka!=null) handler.release(ka);
else handler.release((SocketChannel)key.channel());
if (key.isValid()) key.cancel();
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.getSocket().close(true);
}
} catch (Exception e){
if (log.isDebugEnabled()) {
log.debug(sm.getString(
"endpoint.debug.socketCloseFail"), 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) {
ka.reset();
countDownConnection();
}
} catch (Throwable e) {
ExceptionUtils.handleThrowable(e);
if (log.isDebugEnabled()) log.error("",e);
}
}
/**
* The background thread that listens for incoming TCP/IP connections and
* hands them off to an appropriate processor.
*/
@Override
public void run() {
// Loop until we receive a shutdown command
while (running) {
try {
// Loop if endpoint is paused
while (paused && (!close) ) {
try {
Thread.sleep(100);
} catch (InterruptedException e) {
// Ignore
}
}
boolean hasEvents = events();
// Time to terminate?
if (close) {
timeout(0, false);
break;
}
try {
if ( !close ) {
if (wakeupCounter.get()>0) {
//if we are here, means we have other stuff to do
//do a non blocking select
keyCount = selector.selectNow();
}else {
keyCount = selector.keys().size();
wakeupCounter.set(-1);
keyCount = selector.select(selectorTimeout);
}
wakeupCounter.set(0);
}
if (close) {
timeout(0, false);
selector.close();
break;
}
} catch ( NullPointerException x ) {
//sun bug 5076772 on windows JDK 1.5
if ( log.isDebugEnabled() ) log.debug("Possibly encountered sun bug 5076772 on windows JDK 1.5",x);
if ( wakeupCounter == null || selector == null ) throw x;
continue;
} catch ( CancelledKeyException x ) {
//sun bug 5076772 on windows JDK 1.5
if ( log.isDebugEnabled() ) log.debug("Possibly encountered sun bug 5076772 on windows JDK 1.5",x);
if ( wakeupCounter == null || selector == null ) throw x;
continue;
} 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 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
synchronized (this) {
this.notifyAll();
}
stopLatch.countDown();
}
protected boolean processKey(SelectionKey sk, KeyAttachment attachment) {
boolean result = true;
try {
if ( close ) {
cancelledKey(sk, SocketStatus.STOP, false);
} else if ( sk.isValid() && attachment != null ) {
attachment.access();//make sure we don't time out valid sockets
sk.attach(attachment);//cant remember why this is here
NioChannel channel = attachment.getChannel();
if (sk.isReadable() || sk.isWritable() ) {
if ( attachment.getSendfileData() != null ) {
processSendfile(sk,attachment,true, false);
} else if ( attachment.getComet() ) {
//check if thread is available
if ( isWorkerAvailable() ) {
//set interest ops to 0 so we don't get multiple
//Invocations for both read and write on separate threads
reg(sk, attachment, 0);
//read goes before write
if (sk.isReadable()) {
//read notification
if (!processSocket(channel, SocketStatus.OPEN, true))
processSocket(channel, SocketStatus.DISCONNECT, true);
} else {
//future placement of a WRITE notif
if (!processSocket(channel, SocketStatus.OPEN, true))
processSocket(channel, SocketStatus.DISCONNECT, true);
}
} else {
result = false;
}
} else {
//later on, improve latch behavior
if ( isWorkerAvailable() ) {
unreg(sk, attachment,sk.readyOps());
boolean close = (!processSocket(channel, null, true));
if (close) {
cancelledKey(sk,SocketStatus.DISCONNECT,false);
}
} else {
result = false;
}
}
}
} else {
//invalid key
cancelledKey(sk, SocketStatus.ERROR,false);
}
} catch ( CancelledKeyException ckx ) {
cancelledKey(sk, SocketStatus.ERROR,false);
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
log.error("",t);
}
return result;
}
public boolean processSendfile(SelectionKey sk, KeyAttachment attachment, boolean reg, boolean event) {
NioChannel sc = null;
try {
//unreg(sk,attachment);//only do this if we do process send file on a separate thread
SendfileData sd = attachment.getSendfileData();
if ( sd.fchannel == null ) {
File f = new File(sd.fileName);
if ( !f.exists() ) {
cancelledKey(sk,SocketStatus.ERROR,false);
return false;
}
sd.fchannel = new FileInputStream(f).getChannel();
}
sc = attachment.getChannel();
sc.setSendFile(true);
WritableByteChannel wc = ((sc instanceof SecureNioChannel)?sc:sc.getIOChannel());
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){}
if ( sd.keepAlive ) {
if (reg) {
if (log.isDebugEnabled()) {
log.debug("Connection is keep alive, registering back for OP_READ");
}
if (event) {
this.add(attachment.getChannel(),SelectionKey.OP_READ);
} else {
reg(sk,attachment,SelectionKey.OP_READ);
}
}
} else {
if (log.isDebugEnabled()) {
log.debug("Send file connection is being closed");
}
cancelledKey(sk,SocketStatus.STOP,false);
return false;
}
} else if ( attachment.interestOps() == 0 && reg ) {
if (log.isDebugEnabled()) {
log.debug("OP_WRITE for sendilfe:"+sd.fileName);
}
if (event) {
add(attachment.getChannel(),SelectionKey.OP_WRITE);
} else {
reg(sk,attachment,SelectionKey.OP_WRITE);
}
}
}catch ( IOException x ) {
if ( log.isDebugEnabled() ) log.debug("Unable to complete sendfile request:", x);
cancelledKey(sk,SocketStatus.ERROR,false);
return false;
}catch ( Throwable t ) {
log.error("",t);
cancelledKey(sk, SocketStatus.ERROR, false);
return false;
}finally {
if (sc!=null) sc.setSendFile(false);
}
return true;
}
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);
attachment.setCometOps(intops);
}
protected void timeout(int keyCount, boolean hasEvents) {
long now = System.currentTimeMillis();
//don't process timeouts too frequently, but if the selector simply timed out
//then we can check timeouts to avoid gaps
if ( ((keyCount>0 || hasEvents) ||(now < nextExpiration)) && (!close) ) {
return;
}
long prevExp = nextExpiration; //for logging purposes only
nextExpiration = now + socketProperties.getTimeoutInterval();
//timeout
Set keys = selector.keys();
int keycount = 0;
for (Iterator iter = keys.iterator(); iter.hasNext();) {
SelectionKey key = iter.next();
keycount++;
try {
KeyAttachment ka = (KeyAttachment) key.attachment();
if ( ka == null ) {
cancelledKey(key, SocketStatus.ERROR,false); //we don't support any keys without attachments
} else if ( ka.getError() ) {
cancelledKey(key, SocketStatus.ERROR,true);//TODO this is not yet being used
} else if (ka.getComet() && ka.getCometNotify() ) {
ka.setCometNotify(false);
reg(key,ka,0);//avoid multiple calls, this gets reregistered after invocation
//if (!processSocket(ka.getChannel(), SocketStatus.OPEN_CALLBACK)) processSocket(ka.getChannel(), SocketStatus.DISCONNECT);
if (!processSocket(ka.getChannel(), SocketStatus.OPEN, true)) processSocket(ka.getChannel(), SocketStatus.DISCONNECT, true);
} 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()==-1)?((long) socketProperties.getSoTimeout()):(ka.getTimeout());
boolean isTimedout = 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,true);
} else {
long nextTime = now+(timeout-delta);
nextExpiration = (nextTime < nextExpiration)?nextTime:nextExpiration;
}
} else if (ka.isAsync() || ka.getComet()) {
// Async requests with a timeout of 0 or less never timeout
if (!ka.isAsync() || ka.getTimeout() > 0) {
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.getChannel(), SocketStatus.TIMEOUT, true);
}
}
}//end if
}catch ( CancelledKeyException ckx ) {
cancelledKey(key, SocketStatus.ERROR,false);
}
}//for
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 {
public KeyAttachment(NioChannel channel) {
super(channel);
}
public void reset(Poller poller, NioChannel channel, long soTimeout) {
this.socket = channel;
this.poller = poller;
lastAccess = System.currentTimeMillis();
comet = false;
timeout = soTimeout;
error = false;
lastRegistered = 0;
sendfileData = null;
if ( readLatch!=null ) try {for (int i=0; i<(int)readLatch.getCount();i++) readLatch.countDown();}catch (Exception ignore){}
readLatch = null;
if ( writeLatch!=null ) try {for (int i=0; i<(int)writeLatch.getCount();i++) writeLatch.countDown();}catch (Exception ignore){}
writeLatch = null;
cometNotify = false;
cometOps = SelectionKey.OP_READ;
sendfileData = null;
keepAliveLeft = 100;
async = false;
}
public void reset() {
reset(null,null,-1);
}
public Poller getPoller() { return poller;}
public void setPoller(Poller poller){this.poller = poller;}
public void setComet(boolean comet) { this.comet = comet; }
public boolean getComet() { return comet; }
public void setCometNotify(boolean notify) { this.cometNotify = notify; }
public boolean getCometNotify() { return cometNotify; }
public void setCometOps(int ops) { this.cometOps = ops; }
public int getCometOps() { return cometOps; }
public NioChannel getChannel() { return getSocket();}
public void setChannel(NioChannel channel) { this.socket = channel;}
protected Poller poller = null;
protected int interestOps = 0;
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");
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 long getLastRegistered() { return lastRegistered; }
public void setLastRegistered(long reg) { lastRegistered = reg; }
public void setSendfileData(SendfileData sf) { this.sendfileData = sf;}
public SendfileData getSendfileData() { return this.sendfileData;}
protected boolean comet = false;
protected int cometOps = SelectionKey.OP_READ;
protected boolean cometNotify = false;
protected CountDownLatch readLatch = null;
protected CountDownLatch writeLatch = null;
protected SendfileData sendfileData = null;
}
// ------------------------------------------------ Application Buffer Handler
public static class NioBufferHandler implements ApplicationBufferHandler {
protected ByteBuffer readbuf = null;
protected 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 socket,
SocketStatus status);
public void release(SocketWrapper 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 {
protected NioChannel socket = null;
protected SocketStatus status = null;
public SocketProcessor(NioChannel socket, SocketStatus status) {
reset(socket,status);
}
public void reset(NioChannel socket, SocketStatus status) {
this.socket = socket;
this.status = status;
}
@Override
public void run() {
boolean launch = false;
synchronized (socket) {
SelectionKey key = null;
try {
key = socket.getIOChannel().keyFor(socket.getPoller().getSelector());
int handshake = -1;
try {
if (key!=null) handshake = socket.handshake(key.isReadable(), key.isWritable());
}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(
(KeyAttachment) key.attachment(),
SocketStatus.OPEN);
} else {
state = handler.process(
(KeyAttachment) key.attachment(),
status);
}
if (state == SocketState.CLOSED) {
// Close socket and pool
try {
KeyAttachment ka = null;
if (key!=null) {
ka = (KeyAttachment) key.attachment();
if (ka!=null) ka.setComet(false);
socket.getPoller().cancelledKey(key, SocketStatus.ERROR, false);
}
if (socket!=null) nioChannels.offer(socket);
socket = null;
if ( ka!=null ) keyCache.offer(ka);
ka = null;
}catch ( Exception x ) {
log.error("",x);
}
}
} else if (handshake == -1 ) {
KeyAttachment ka = null;
if (key!=null) {
ka = (KeyAttachment) key.attachment();
socket.getPoller().cancelledKey(key, SocketStatus.DISCONNECT, false);
}
if (socket!=null) nioChannels.offer(socket);
socket = null;
if ( ka!=null ) keyCache.offer(ka);
ka = null;
} else {
final SelectionKey fk = key;
final int intops = handshake;
final KeyAttachment ka = (KeyAttachment)fk.attachment();
ka.getPoller().add(socket,intops);
}
}catch(CancelledKeyException cx) {
socket.getPoller().cancelledKey(key,null,false);
} catch (OutOfMemoryError oom) {
try {
oomParachuteData = null;
socket.getPoller().cancelledKey(key,SocketStatus.ERROR,false);
releaseCaches();
log.error("", oom);
}catch ( Throwable oomt ) {
try {
System.err.println(oomParachuteMsg);
oomt.printStackTrace();
}catch (Throwable letsHopeWeDontGetHere){
ExceptionUtils.handleThrowable(letsHopeWeDontGetHere);
}
}
}catch ( Throwable t ) {
log.error("",t);
socket.getPoller().cancelledKey(key,SocketStatus.ERROR,false);
} finally {
if (launch) {
try {
getExecutor().execute(new SocketProcessor(socket, SocketStatus.OPEN));
} catch (NullPointerException npe) {
if (running) {
log.error(sm.getString("endpoint.launch.fail"),
npe);
}
}
}
socket = null;
status = null;
//return to cache
processorCache.offer(this);
}
}
}
}
// ----------------------------------------------- SendfileData Inner Class
/**
* SendfileData class.
*/
public static class SendfileData {
// File
public String fileName;
public FileChannel fchannel;
public long pos;
public long length;
// KeepAlive flag
public boolean keepAlive;
}
}
