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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.ajp;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;
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.AprEndpoint;
import org.apache.tomcat.util.net.AprEndpoint.Handler;
import org.apache.tomcat.util.net.SocketStatus;
import org.apache.tomcat.util.net.SocketWrapper;
/**
* 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
*/
public class AjpAprProtocol extends AbstractAjpProtocol {
private static final Log log = LogFactory.getLog(AjpAprProtocol.class);
@Override
protected Log getLog() { return log; }
@Override
protected AbstractEndpoint.Handler getHandler() {
return cHandler;
}
// ------------------------------------------------------------ Constructor
public AjpAprProtocol() {
endpoint = new AprEndpoint();
cHandler = new AjpConnectionHandler(this);
((AprEndpoint) endpoint).setHandler(cHandler);
setSoLinger(Constants.DEFAULT_CONNECTION_LINGER);
setSoTimeout(Constants.DEFAULT_CONNECTION_TIMEOUT);
setTcpNoDelay(Constants.DEFAULT_TCP_NO_DELAY);
setUseSendfile(Constants.DEFAULT_USE_SENDFILE);
}
// ----------------------------------------------------- Instance Variables
/**
* Connection handler for AJP.
*/
private AjpConnectionHandler cHandler;
// --------------------------------------------------------- Public Methods
public boolean getUseSendfile() { return endpoint.getUseSendfile(); }
public void setUseSendfile(@SuppressWarnings("unused") boolean useSendfile) {
/* No sendfile for AJP */
}
public int getPollTime() { return ((AprEndpoint)endpoint).getPollTime(); }
public void setPollTime(int pollTime) { ((AprEndpoint)endpoint).setPollTime(pollTime); }
public void setPollerSize(int pollerSize) { ((AprEndpoint)endpoint).setPollerSize(pollerSize); }
public int getPollerSize() { return ((AprEndpoint)endpoint).getPollerSize(); }
// ----------------------------------------------------- JMX related methods
@Override
protected String getNamePrefix() {
return ("ajp-apr");
}
// -------------------------------------- AjpConnectionHandler Inner Class
protected static class AjpConnectionHandler implements Handler {
protected AjpAprProtocol proto;
protected AtomicLong registerCount = new AtomicLong(0);
protected RequestGroupInfo global = new RequestGroupInfo();
protected ConcurrentHashMap, AjpAprProcessor> connections =
new ConcurrentHashMap, AjpAprProcessor>();
protected ConcurrentLinkedQueue recycledProcessors =
new ConcurrentLinkedQueue() {
private static final long serialVersionUID = 1L;
protected AtomicInteger size = new AtomicInteger(0);
@Override
public boolean offer(AjpAprProcessor processor) {
boolean offer = (proto.processorCache == -1) ? true : (size.get() < proto.processorCache);
//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) unregister(processor);
return result;
}
@Override
public AjpAprProcessor poll() {
AjpAprProcessor result = super.poll();
if ( result != null ) {
size.decrementAndGet();
}
return result;
}
@Override
public void clear() {
AjpAprProcessor next = poll();
while ( next != null ) {
unregister(next);
next = poll();
}
super.clear();
size.set(0);
}
};
public AjpConnectionHandler(AjpAprProtocol proto) {
this.proto = proto;
}
@Override
public Object getGlobal() {
return global;
}
@Override
public void recycle() {
recycledProcessors.clear();
}
// FIXME: Support for this could be added in AJP as well
@Override
public SocketState event(SocketWrapper socket, SocketStatus status) {
return SocketState.CLOSED;
}
@Override
public SocketState process(SocketWrapper socket) {
AjpAprProcessor processor = recycledProcessors.poll();
try {
if (processor == null) {
processor = createProcessor();
}
SocketState state = processor.process(socket);
if (state == SocketState.LONG) {
// Check if the post processing is going to change the state
state = processor.asyncPostProcess();
}
if (state == SocketState.LONG || state == SocketState.ASYNC_END) {
// Need to make socket available for next processing cycle
// but no need for the poller
connections.put(socket, processor);
socket.setAsync(true);
} else {
if (state == SocketState.OPEN) {
connections.put(socket, processor);
}
recycledProcessors.offer(processor);
}
return state;
} catch(java.net.SocketException e) {
// SocketExceptions are normal
log.debug(sm.getString(
"ajpprotocol.proto.socketexception.debug"), e);
} catch (java.io.IOException e) {
// IOExceptions are normal
log.debug(sm.getString(
"ajpprotocol.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("ajpprotocol.proto.error"), e);
}
recycledProcessors.offer(processor);
return SocketState.CLOSED;
}
@Override
public SocketState asyncDispatch(SocketWrapper socket, SocketStatus status) {
AjpAprProcessor result = connections.get(socket);
SocketState state = SocketState.CLOSED;
if (result != null) {
// Call the appropriate event
try {
state = result.asyncDispatch(socket, status);
}
// Future developers: if you discover any other
// rare-but-nonfatal exceptions, catch them here, and log as
// debug.
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.
AjpAprProtocol.log.error
(sm.getString("ajpprotocol.proto.error"), e);
} finally {
if (state == SocketState.LONG && result.isAsync()) {
state = result.asyncPostProcess();
}
if (state != SocketState.LONG && state != SocketState.ASYNC_END) {
connections.remove(socket);
recycledProcessors.offer(result);
if (state == SocketState.OPEN) {
((AprEndpoint)proto.endpoint).getPoller().add(socket.getSocket().longValue());
}
}
}
}
return state;
}
protected AjpAprProcessor createProcessor() {
AjpAprProcessor processor = new AjpAprProcessor(proto.packetSize, (AprEndpoint)proto.endpoint);
processor.setAdapter(proto.adapter);
processor.setTomcatAuthentication(proto.tomcatAuthentication);
processor.setRequiredSecret(proto.requiredSecret);
register(processor);
return processor;
}
protected void register(AjpAprProcessor processor) {
if (proto.getDomain() != null) {
synchronized (this) {
try {
long count = registerCount.incrementAndGet();
RequestInfo rp = processor.getRequest().getRequestProcessor();
rp.setGlobalProcessor(global);
ObjectName rpName = new ObjectName
(proto.getDomain() + ":type=RequestProcessor,worker="
+ proto.getName() + ",name=AjpRequest" + count);
if (log.isDebugEnabled()) {
log.debug("Register " + rpName);
}
Registry.getRegistry(null, null).registerComponent(rp, rpName, null);
rp.setRpName(rpName);
} catch (Exception e) {
log.warn("Error registering request");
}
}
}
}
protected void unregister(AjpAprProcessor processor) {
if (proto.getDomain() != null) {
synchronized (this) {
try {
RequestInfo rp = processor.getRequest().getRequestProcessor();
rp.setGlobalProcessor(null);
ObjectName rpName = rp.getRpName();
if (log.isDebugEnabled()) {
log.debug("Unregister " + rpName);
}
Registry.getRegistry(null, null).unregisterComponent(rpName);
rp.setRpName(null);
} catch (Exception e) {
log.warn("Error unregistering request", e);
}
}
}
}
}
}
