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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.coyote.http11;
import java.nio.channels.SelectionKey;
import java.nio.channels.SocketChannel;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.Iterator;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.atomic.AtomicInteger;
import javax.management.ObjectName;
import org.apache.coyote.RequestGroupInfo;
import org.apache.coyote.RequestInfo;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.tomcat.util.ExceptionUtils;
import org.apache.tomcat.util.modeler.Registry;
import org.apache.tomcat.util.net.AbstractEndpoint;
import org.apache.tomcat.util.net.NioChannel;
import org.apache.tomcat.util.net.NioEndpoint;
import org.apache.tomcat.util.net.NioEndpoint.Handler;
import org.apache.tomcat.util.net.SSLImplementation;
import org.apache.tomcat.util.net.SecureNioChannel;
import org.apache.tomcat.util.net.SocketStatus;
/**
* Abstract the protocol implementation, including threading, etc.
* Processor is single threaded and specific to stream-based protocols,
* will not fit Jk protocols like JNI.
*
* @author Remy Maucherat
* @author Costin Manolache
* @author Filip Hanik
*/
public class Http11NioProtocol extends AbstractHttp11JsseProtocol {
private static final Log log = LogFactory.getLog(Http11NioProtocol.class);
@Override
protected Log getLog() { return log; }
@Override
protected AbstractEndpoint.Handler getHandler() {
return cHandler;
}
public Http11NioProtocol() {
endpoint=new NioEndpoint();
cHandler = new Http11ConnectionHandler(this);
((NioEndpoint) endpoint).setHandler(cHandler);
setSoLinger(Constants.DEFAULT_CONNECTION_LINGER);
setSoTimeout(Constants.DEFAULT_CONNECTION_TIMEOUT);
setTcpNoDelay(Constants.DEFAULT_TCP_NO_DELAY);
setProcessorCache(200);
}
public NioEndpoint getEndpoint() {
return ((NioEndpoint)endpoint);
}
// -------------------- Properties--------------------
private int socketCloseDelay=-1;
private Http11ConnectionHandler cHandler;
// -------------------- Pool setup --------------------
public void setPollerThreadCount(int count) {
((NioEndpoint)endpoint).setPollerThreadCount(count);
}
public int getPollerThreadCount() {
return ((NioEndpoint)endpoint).getPollerThreadCount();
}
public void setSelectorTimeout(long timeout) {
((NioEndpoint)endpoint).setSelectorTimeout(timeout);
}
public long getSelectorTimeout() {
return ((NioEndpoint)endpoint).getSelectorTimeout();
}
// *
public void setAcceptorThreadPriority(int threadPriority) {
((NioEndpoint)endpoint).setAcceptorThreadPriority(threadPriority);
}
public void setPollerThreadPriority(int threadPriority) {
((NioEndpoint)endpoint).setPollerThreadPriority(threadPriority);
}
public int getAcceptorThreadPriority() {
return ((NioEndpoint)endpoint).getAcceptorThreadPriority();
}
public int getPollerThreadPriority() {
return ((NioEndpoint)endpoint).getThreadPriority();
}
public boolean getUseSendfile() {
return ((NioEndpoint)endpoint).getUseSendfile();
}
public void setUseSendfile(boolean useSendfile) {
((NioEndpoint)endpoint).setUseSendfile(useSendfile);
}
// -------------------- Tcp setup --------------------
public int getSocketCloseDelay() {
return socketCloseDelay;
}
public void setSocketCloseDelay( int d ) {
socketCloseDelay=d;
}
public void setOomParachute(int oomParachute) {
((NioEndpoint)endpoint).setOomParachute(oomParachute);
}
// ----------------------------------------------------- JMX related methods
@Override
protected String getNamePrefix() {
return ("http-nio");
}
// -------------------- Connection handler --------------------
static class Http11ConnectionHandler implements Handler {
protected Http11NioProtocol proto;
protected static int count = 0;
protected RequestGroupInfo global = new RequestGroupInfo();
protected ConcurrentHashMap connections =
new ConcurrentHashMap();
protected ConcurrentLinkedQueue recycledProcessors = new ConcurrentLinkedQueue() {
private static final long serialVersionUID = 1L;
protected AtomicInteger size = new AtomicInteger(0);
@Override
public boolean offer(Http11NioProcessor processor) {
boolean offer = proto.getProcessorCache()==-1?true:size.get() < proto.getProcessorCache();
//avoid over growing our cache or add after we have stopped
boolean result = false;
if ( offer ) {
result = super.offer(processor);
if ( result ) {
size.incrementAndGet();
}
}
if (!result) deregister(processor);
return result;
}
@Override
public Http11NioProcessor poll() {
Http11NioProcessor result = super.poll();
if ( result != null ) {
size.decrementAndGet();
}
return result;
}
@Override
public void clear() {
Http11NioProcessor next = poll();
while ( next != null ) {
deregister(next);
next = poll();
}
super.clear();
size.set(0);
}
};
Http11ConnectionHandler(Http11NioProtocol proto) {
this.proto = proto;
}
@Override
public Object getGlobal() {
return global;
}
@Override
public void recycle() {
recycledProcessors.clear();
}
@Override
public SSLImplementation getSslImplementation() {
return proto.sslImplementation;
}
@Override
public void release(SocketChannel socket) {
if (log.isDebugEnabled())
log.debug("Iterating through our connections to release a socket channel:"+socket);
boolean released = false;
Iterator> it = connections.entrySet().iterator();
while (it.hasNext()) {
java.util.Map.Entry entry = it.next();
if (entry.getKey().getIOChannel()==socket) {
it.remove();
Http11NioProcessor result = entry.getValue();
result.recycle();
deregister(result);
released = true;
break;
}
}
if (log.isDebugEnabled())
log.debug("Done iterating through our connections to release a socket channel:"+socket +" released:"+released);
}
/**
* Use this only if the processor is not available, otherwise use
* {@link #release(NioChannel, Http11NioProcessor).
*/
@Override
public void release(NioChannel socket) {
Http11NioProcessor result = connections.remove(socket);
if ( result != null ) {
result.recycle();
recycledProcessors.offer(result);
}
}
public void release(NioChannel socket, Http11NioProcessor processor) {
connections.remove(socket);
processor.recycle();
recycledProcessors.offer(processor);
}
@Override
public SocketState event(NioChannel socket, SocketStatus status) {
Http11NioProcessor processor = connections.get(socket);
NioEndpoint.KeyAttachment att = (NioEndpoint.KeyAttachment)socket.getAttachment(false);
att.setAsync(false); //no longer check for timeout
SocketState state = SocketState.CLOSED;
if (processor != null) {
if (log.isDebugEnabled()) log.debug("Http11NioProcessor.error="+processor.error);
// Call the appropriate event
try {
if (processor.comet) {
state = processor.event(status);
} else {
state = processor.asyncDispatch(status);
}
} catch (java.net.SocketException e) {
// SocketExceptions are normal
Http11NioProtocol.log.debug
(sm.getString
("http11protocol.proto.socketexception.debug"), e);
} catch (java.io.IOException e) {
// IOExceptions are normal
Http11NioProtocol.log.debug
(sm.getString
("http11protocol.proto.ioexception.debug"), e);
}
// Future developers: if you discover any other
// rare-but-nonfatal exceptions, catch them here, and log as
// above.
catch (Throwable e) {
ExceptionUtils.handleThrowable(e);
// any other exception or error is odd. Here we log it
// with "ERROR" level, so it will show up even on
// less-than-verbose logs.
Http11NioProtocol.log.error
(sm.getString("http11protocol.proto.error"), e);
} finally {
if (processor.isAsync()) {
state = processor.asyncPostProcess();
}
if (state == SocketState.OPEN || state == SocketState.CLOSED) {
release(socket, processor);
if (state == SocketState.OPEN) {
socket.getPoller().add(socket);
}
} else if (state == SocketState.LONG) {
if (processor.isAsync()) {
att.setAsync(true); // Re-enable timeouts
} else {
// Comet
if (log.isDebugEnabled()) log.debug("Keeping processor["+processor);
// May receive more data from client
SelectionKey key = socket.getIOChannel().keyFor(socket.getPoller().getSelector());
key.interestOps(SelectionKey.OP_READ);
att.interestOps(SelectionKey.OP_READ);
}
} else {
// state == SocketState.ASYNC_END
// No further work required
}
}
}
return state;
}
@Override
public SocketState process(NioChannel socket) {
Http11NioProcessor processor = connections.remove(socket);
try {
if (processor == null) {
processor = recycledProcessors.poll();
}
if (processor == null) {
processor = createProcessor();
}
if (proto.isSSLEnabled() &&
(proto.sslImplementation != null)
&& (socket instanceof SecureNioChannel)) {
SecureNioChannel ch = (SecureNioChannel)socket;
processor.setSslSupport(
proto.sslImplementation.getSSLSupport(
ch.getSslEngine().getSession()));
} else {
processor.setSslSupport(null);
}
SocketState state = processor.process(socket);
if (state == SocketState.LONG) {
// In the middle of processing a request/response. Keep the
// socket associated with the processor.
connections.put(socket, processor);
if (processor.isAsync()) {
NioEndpoint.KeyAttachment att = (NioEndpoint.KeyAttachment)socket.getAttachment(false);
att.setAsync(true);
// longPoll may change socket state (e.g. to trigger a
// complete or dispatch)
state = processor.asyncPostProcess();
} else {
// Either:
// - this is comet request
// - the request line/headers have not been completely
// read
SelectionKey key = socket.getIOChannel().keyFor(
socket.getPoller().getSelector());
NioEndpoint.KeyAttachment att =
(NioEndpoint.KeyAttachment)socket.getAttachment(false);
key.interestOps(SelectionKey.OP_READ);
att.interestOps(SelectionKey.OP_READ);
}
}
if (state == SocketState.LONG || state == SocketState.ASYNC_END) {
// Already done all we need to do.
} else if (state == SocketState.OPEN){
// In keep-alive but between requests. OK to recycle
// processor. Continue to poll for the next request.
release(socket, processor);
socket.getPoller().add(socket);
} else {
// Connection closed. OK to recycle the processor.
release(socket, processor);
}
return state;
} catch (java.net.SocketException e) {
// SocketExceptions are normal
log.debug(sm.getString(
"http11protocol.proto.socketexception.debug"), e);
} catch (java.io.IOException e) {
// IOExceptions are normal
log.debug(sm.getString(
"http11protocol.proto.ioexception.debug"), e);
}
// Future developers: if you discover any other
// rare-but-nonfatal exceptions, catch them here, and log as
// above.
catch (Throwable e) {
ExceptionUtils.handleThrowable(e);
// any other exception or error is odd. Here we log it
// with "ERROR" level, so it will show up even on
// less-than-verbose logs.
log.error(sm.getString("http11protocol.proto.error"), e);
}
release(socket, processor);
return SocketState.CLOSED;
}
public Http11NioProcessor createProcessor() {
Http11NioProcessor processor = new Http11NioProcessor(
proto.getMaxHttpHeaderSize(), (NioEndpoint)proto.endpoint,
proto.getMaxTrailerSize());
processor.setAdapter(proto.adapter);
processor.setMaxKeepAliveRequests(proto.getMaxKeepAliveRequests());
processor.setConnectionUploadTimeout(
proto.getConnectionUploadTimeout());
processor.setDisableUploadTimeout(proto.getDisableUploadTimeout());
processor.setCompressionMinSize(proto.getCompressionMinSize());
processor.setCompression(proto.getCompression());
processor.setNoCompressionUserAgents(proto.getNoCompressionUserAgents());
processor.setCompressableMimeTypes(proto.getCompressableMimeTypes());
processor.setRestrictedUserAgents(proto.getRestrictedUserAgents());
processor.setSocketBuffer(proto.getSocketBuffer());
processor.setMaxSavePostSize(proto.getMaxSavePostSize());
processor.setServer(proto.getServer());
register(processor);
return processor;
}
AtomicInteger registerCount = new AtomicInteger(0);
public void register(Http11NioProcessor processor) {
if (proto.getDomain() != null) {
synchronized (this) {
try {
registerCount.addAndGet(1);
if (log.isDebugEnabled()) log.debug("Register ["+processor+"] count="+registerCount.get());
final RequestInfo rp = processor.getRequest().getRequestProcessor();
rp.setGlobalProcessor(global);
final ObjectName rpName = new ObjectName
(proto.getDomain() + ":type=RequestProcessor,worker="
+ proto.getName() + ",name=HttpRequest" + count++);
if (Constants.IS_SECURITY_ENABLED) {
AccessController.doPrivileged(new PrivilegedAction() {
@Override
public Void run() {
try {
Registry.getRegistry(null, null).registerComponent(rp, rpName, null);
} catch (Exception e) {
log.warn("Error registering request");
}
return null;
}
});
} else {
Registry.getRegistry(null, null).registerComponent(rp, rpName, null);
}
rp.setRpName(rpName);
} catch (Exception e) {
log.warn("Error registering request");
}
}
}
}
public void deregister(Http11NioProcessor processor) {
if (proto.getDomain() != null) {
synchronized (this) {
try {
registerCount.addAndGet(-1);
if (log.isDebugEnabled()) log.debug("Deregister ["+processor+"] count="+registerCount.get());
RequestInfo rp = processor.getRequest().getRequestProcessor();
rp.setGlobalProcessor(null);
ObjectName rpName = rp.getRpName();
Registry.getRegistry(null, null).unregisterComponent(rpName);
rp.setRpName(null);
} catch (Exception e) {
log.warn("Error unregistering request", e);
}
}
}
}
}
}
