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org.apache.coyote.ajp.AjpProtocol Maven / Gradle / Ivy
/*
* 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.net.InetAddress;
import java.net.Socket;
import java.net.URLEncoder;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.Executor;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;
import javax.management.MBeanRegistration;
import javax.management.MBeanServer;
import javax.management.ObjectName;
import org.apache.coyote.ActionCode;
import org.apache.coyote.Adapter;
import org.apache.coyote.ProtocolHandler;
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.modeler.Registry;
import org.apache.tomcat.util.net.JIoEndpoint;
import org.apache.tomcat.util.net.SocketStatus;
import org.apache.tomcat.util.net.SocketWrapper;
import org.apache.tomcat.util.net.AbstractEndpoint.Handler.SocketState;
import org.apache.tomcat.util.net.JIoEndpoint.Handler;
import org.apache.tomcat.util.res.StringManager;
/**
* 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 AjpProtocol
implements ProtocolHandler, MBeanRegistration {
private static final Log log = LogFactory.getLog(AjpProtocol.class);
/**
* The string manager for this package.
*/
protected static final StringManager sm =
StringManager.getManager(Constants.Package);
// ------------------------------------------------------------ Constructor
public AjpProtocol() {
cHandler = new AjpConnectionHandler(this);
setSoLinger(Constants.DEFAULT_CONNECTION_LINGER);
setSoTimeout(Constants.DEFAULT_CONNECTION_TIMEOUT);
//setServerSoTimeout(Constants.DEFAULT_SERVER_SOCKET_TIMEOUT);
setTcpNoDelay(Constants.DEFAULT_TCP_NO_DELAY);
}
// ----------------------------------------------------- Instance Variables
protected ObjectName tpOname;
protected ObjectName rgOname;
/**
* Associated java.io endpoint.
*/
protected JIoEndpoint endpoint = new JIoEndpoint();
/**
* Configuration attributes.
*/
protected Hashtable attributes =
new Hashtable();
/**
* Adapter which will process the requests received by this endpoint.
*/
private Adapter adapter;
/**
* Connection handler for AJP.
*/
private AjpConnectionHandler cHandler;
// --------------------------------------------------------- Public Methods
/**
* Pass config info
*/
public void setAttribute(String name, Object value) {
if (log.isTraceEnabled()) {
log.trace(sm.getString("ajpprotocol.setattribute", name, value));
}
attributes.put(name, value);
}
public Object getAttribute(String key) {
if (log.isTraceEnabled()) {
log.trace(sm.getString("ajpprotocol.getattribute", key));
}
return attributes.get(key);
}
public Iterator getAttributeNames() {
return attributes.keySet().iterator();
}
/**
* The adapter, used to call the connector
*/
public void setAdapter(Adapter adapter) {
this.adapter = adapter;
}
public Adapter getAdapter() {
return adapter;
}
/** Start the protocol
*/
public void init() throws Exception {
endpoint.setName(getName());
endpoint.setHandler(cHandler);
try {
endpoint.init();
} catch (Exception ex) {
log.error(sm.getString("ajpprotocol.endpoint.initerror"), ex);
throw ex;
}
if (log.isInfoEnabled()) {
log.info(sm.getString("ajpprotocol.init", getName()));
}
}
public void start() throws Exception {
if (this.domain != null ) {
try {
tpOname = new ObjectName
(domain + ":" + "type=ThreadPool,name=" + getName());
Registry.getRegistry(null, null)
.registerComponent(endpoint, tpOname, null );
} catch (Exception e) {
log.error("Can't register threadpool" );
}
rgOname = new ObjectName
(domain + ":type=GlobalRequestProcessor,name=" + getName());
Registry.getRegistry(null, null).registerComponent
(cHandler.global, rgOname, null);
}
try {
endpoint.start();
} catch (Exception ex) {
log.error(sm.getString("ajpprotocol.endpoint.starterror"), ex);
throw ex;
}
if (log.isInfoEnabled())
log.info(sm.getString("ajpprotocol.start", getName()));
}
public void pause() throws Exception {
try {
endpoint.pause();
} catch (Exception ex) {
log.error(sm.getString("ajpprotocol.endpoint.pauseerror"), ex);
throw ex;
}
if (log.isInfoEnabled())
log.info(sm.getString("ajpprotocol.pause", getName()));
}
public void resume() throws Exception {
try {
endpoint.resume();
} catch (Exception ex) {
log.error(sm.getString("ajpprotocol.endpoint.resumeerror"), ex);
throw ex;
}
if (log.isInfoEnabled())
log.info(sm.getString("ajpprotocol.resume", getName()));
}
public void destroy() throws Exception {
if (log.isInfoEnabled())
log.info(sm.getString("ajpprotocol.stop", getName()));
endpoint.destroy();
if (tpOname!=null)
Registry.getRegistry(null, null).unregisterComponent(tpOname);
if (rgOname != null)
Registry.getRegistry(null, null).unregisterComponent(rgOname);
}
// *
public String getName() {
String encodedAddr = "";
if (getAddress() != null) {
encodedAddr = "" + getAddress();
if (encodedAddr.startsWith("/"))
encodedAddr = encodedAddr.substring(1);
encodedAddr = URLEncoder.encode(encodedAddr) + "-";
}
return ("ajp-" + encodedAddr + endpoint.getPort());
}
/**
* Processor cache.
*/
protected int processorCache = -1;
public int getProcessorCache() { return this.processorCache; }
public void setProcessorCache(int processorCache) { this.processorCache = processorCache; }
public Executor getExecutor() { return endpoint.getExecutor(); }
public void setExecutor(Executor executor) { endpoint.setExecutor(executor); }
public int getMaxThreads() { return endpoint.getMaxThreads(); }
public void setMaxThreads(int maxThreads) { endpoint.setMaxThreads(maxThreads); }
public int getThreadPriority() { return endpoint.getThreadPriority(); }
public void setThreadPriority(int threadPriority) { endpoint.setThreadPriority(threadPriority); }
public int getBacklog() { return endpoint.getBacklog(); }
public void setBacklog(int backlog) { endpoint.setBacklog(backlog); }
public int getPort() { return endpoint.getPort(); }
public void setPort(int port) { endpoint.setPort(port); }
public InetAddress getAddress() { return endpoint.getAddress(); }
public void setAddress(InetAddress ia) { endpoint.setAddress(ia); }
public boolean getTcpNoDelay() { return endpoint.getTcpNoDelay(); }
public void setTcpNoDelay(boolean tcpNoDelay) { endpoint.setTcpNoDelay(tcpNoDelay); }
public int getSoLinger() { return endpoint.getSoLinger(); }
public void setSoLinger(int soLinger) { endpoint.setSoLinger(soLinger); }
public int getSoTimeout() { return endpoint.getSoTimeout(); }
public void setSoTimeout(int soTimeout) { endpoint.setSoTimeout(soTimeout); }
/**
* Should authentication be done in the native webserver layer,
* or in the Servlet container ?
*/
protected boolean tomcatAuthentication = true;
public boolean getTomcatAuthentication() { return tomcatAuthentication; }
public void setTomcatAuthentication(boolean tomcatAuthentication) { this.tomcatAuthentication = tomcatAuthentication; }
/**
* Required secret.
*/
protected String requiredSecret = null;
public void setRequiredSecret(String requiredSecret) { this.requiredSecret = requiredSecret; }
/**
* AJP packet size.
*/
protected int packetSize = Constants.MAX_PACKET_SIZE;
public int getPacketSize() { return packetSize; }
public void setPacketSize(int packetSize) {
if(packetSize < Constants.MAX_PACKET_SIZE) {
this.packetSize = Constants.MAX_PACKET_SIZE;
} else {
this.packetSize = packetSize;
}
}
/**
* The number of seconds Tomcat will wait for a subsequent request
* before closing the connection.
*/
protected int keepAliveTimeout = -1;
public int getKeepAliveTimeout() { return keepAliveTimeout; }
public void setKeepAliveTimeout(int timeout) { keepAliveTimeout = timeout; }
// -------------------------------------- AjpConnectionHandler Inner Class
protected static class AjpConnectionHandler implements Handler {
protected AjpProtocol proto;
protected AtomicLong registerCount = new AtomicLong(0);
protected RequestGroupInfo global = new RequestGroupInfo();
protected ConcurrentHashMap, AjpProcessor> connections =
new ConcurrentHashMap, AjpProcessor>();
protected ConcurrentLinkedQueue recycledProcessors =
new ConcurrentLinkedQueue() {
protected AtomicInteger size = new AtomicInteger(0);
@Override
public boolean offer(AjpProcessor 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 AjpProcessor poll() {
AjpProcessor result = super.poll();
if ( result != null ) {
size.decrementAndGet();
}
return result;
}
@Override
public void clear() {
AjpProcessor next = poll();
while ( next != null ) {
unregister(next);
next = poll();
}
super.clear();
size.set(0);
}
};
public AjpConnectionHandler(AjpProtocol proto) {
this.proto = proto;
}
public SocketState process(SocketWrapper socket) {
return process(socket,SocketStatus.OPEN);
}
public SocketState process(SocketWrapper socket, SocketStatus status) {
AjpProcessor processor = connections.remove(socket);
try {
if (processor == null) {
processor = recycledProcessors.poll();
}
if (processor == null) {
processor = createProcessor();
}
processor.action(ActionCode.ACTION_START, null);
SocketState state = socket.isAsync()?processor.asyncDispatch(status):processor.process(socket);
if (state == SocketState.LONG) {
connections.put(socket, processor);
socket.setAsync(true);
} else {
connections.remove(socket);
socket.setAsync(false);
}
return state;
} catch(java.net.SocketException e) {
// SocketExceptions are normal
AjpProtocol.log.debug
(sm.getString
("ajpprotocol.proto.socketexception.debug"), e);
} catch (java.io.IOException e) {
// IOExceptions are normal
AjpProtocol.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) {
// 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.
AjpProtocol.log.error
(sm.getString("ajpprotocol.proto.error"), e);
} finally {
processor.action(ActionCode.ACTION_STOP, null);
recycledProcessors.offer(processor);
}
return SocketState.CLOSED;
}
protected AjpProcessor createProcessor() {
AjpProcessor processor = new AjpProcessor(proto.packetSize, proto.endpoint);
processor.setAdapter(proto.adapter);
processor.setTomcatAuthentication(proto.tomcatAuthentication);
processor.setRequiredSecret(proto.requiredSecret);
processor.setKeepAliveTimeout(proto.keepAliveTimeout);
register(processor);
return processor;
}
protected void register(AjpProcessor 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(AjpProcessor 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);
}
}
}
}
}
// -------------------- Various implementation classes --------------------
protected String domain;
protected ObjectName oname;
protected MBeanServer mserver;
public ObjectName getObjectName() {
return oname;
}
public String getDomain() {
return domain;
}
public ObjectName preRegister(MBeanServer server,
ObjectName name) throws Exception {
oname=name;
mserver=server;
domain=name.getDomain();
return name;
}
public void postRegister(Boolean registrationDone) {
}
public void preDeregister() throws Exception {
}
public void postDeregister() {
}
}
