Source Code Cross Referenced for AjpProtocol.java in  » Sevlet-Container » apache-tomcat-6.0.14 » org » apache » coyote » ajp » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Sevlet Container » apache tomcat 6.0.14 » org.apache.coyote.ajp 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *  Licensed to the Apache Software Foundation (ASF) under one or more
003:         *  contributor license agreements.  See the NOTICE file distributed with
004:         *  this work for additional information regarding copyright ownership.
005:         *  The ASF licenses this file to You under the Apache License, Version 2.0
006:         *  (the "License"); you may not use this file except in compliance with
007:         *  the License.  You may obtain a copy of the License at
008:         *
009:         *      http://www.apache.org/licenses/LICENSE-2.0
010:         *
011:         *  Unless required by applicable law or agreed to in writing, software
012:         *  distributed under the License is distributed on an "AS IS" BASIS,
013:         *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014:         *  See the License for the specific language governing permissions and
015:         *  limitations under the License.
016:         */
017:
018:        package org.apache.coyote.ajp;
019:
020:        import java.net.InetAddress;
021:        import java.net.Socket;
022:        import java.net.URLEncoder;
023:        import java.util.Hashtable;
024:        import java.util.Iterator;
025:        import java.util.concurrent.ConcurrentLinkedQueue;
026:        import java.util.concurrent.Executor;
027:        import java.util.concurrent.atomic.AtomicInteger;
028:        import java.util.concurrent.atomic.AtomicLong;
029:
030:        import javax.management.MBeanRegistration;
031:        import javax.management.MBeanServer;
032:        import javax.management.ObjectName;
033:
034:        import org.apache.coyote.ActionCode;
035:        import org.apache.coyote.ActionHook;
036:        import org.apache.coyote.Adapter;
037:        import org.apache.coyote.ProtocolHandler;
038:        import org.apache.coyote.RequestGroupInfo;
039:        import org.apache.coyote.RequestInfo;
040:        import org.apache.tomcat.util.modeler.Registry;
041:        import org.apache.tomcat.util.net.JIoEndpoint;
042:        import org.apache.tomcat.util.net.JIoEndpoint.Handler;
043:        import org.apache.tomcat.util.res.StringManager;
044:
045:        /**
046:         * Abstract the protocol implementation, including threading, etc.
047:         * Processor is single threaded and specific to stream-based protocols,
048:         * will not fit Jk protocols like JNI.
049:         *
050:         * @author Remy Maucherat
051:         * @author Costin Manolache
052:         */
053:        public class AjpProtocol implements  ProtocolHandler, MBeanRegistration {
054:
055:            protected static org.apache.juli.logging.Log log = org.apache.juli.logging.LogFactory
056:                    .getLog(AjpProtocol.class);
057:
058:            /**
059:             * The string manager for this package.
060:             */
061:            protected static StringManager sm = StringManager
062:                    .getManager(Constants.Package);
063:
064:            // ------------------------------------------------------------ Constructor
065:
066:            public AjpProtocol() {
067:                cHandler = new AjpConnectionHandler(this );
068:                setSoLinger(Constants.DEFAULT_CONNECTION_LINGER);
069:                setSoTimeout(Constants.DEFAULT_CONNECTION_TIMEOUT);
070:                //setServerSoTimeout(Constants.DEFAULT_SERVER_SOCKET_TIMEOUT);
071:                setTcpNoDelay(Constants.DEFAULT_TCP_NO_DELAY);
072:            }
073:
074:            // ----------------------------------------------------- Instance Variables
075:
076:            protected ObjectName tpOname;
077:
078:            protected ObjectName rgOname;
079:
080:            /**
081:             * Associated java.io endpoint.
082:             */
083:            protected JIoEndpoint endpoint = new JIoEndpoint();
084:
085:            /**
086:             * Configuration attributes.
087:             */
088:            protected Hashtable attributes = new Hashtable();
089:
090:            /**
091:             * Adapter which will process the requests recieved by this endpoint.
092:             */
093:            private Adapter adapter;
094:
095:            /**
096:             * Connection handler for AJP.
097:             */
098:            private AjpConnectionHandler cHandler;
099:
100:            // --------------------------------------------------------- Public Methods
101:
102:            /** 
103:             * Pass config info
104:             */
105:            public void setAttribute(String name, Object value) {
106:                if (log.isTraceEnabled()) {
107:                    log.trace(sm.getString("ajpprotocol.setattribute", name,
108:                            value));
109:                }
110:                attributes.put(name, value);
111:            }
112:
113:            public Object getAttribute(String key) {
114:                if (log.isTraceEnabled()) {
115:                    log.trace(sm.getString("ajpprotocol.getattribute", key));
116:                }
117:                return attributes.get(key);
118:            }
119:
120:            public Iterator getAttributeNames() {
121:                return attributes.keySet().iterator();
122:            }
123:
124:            /**
125:             * Set a property.
126:             */
127:            public void setProperty(String name, String value) {
128:                setAttribute(name, value);
129:            }
130:
131:            /**
132:             * Get a property
133:             */
134:            public String getProperty(String name) {
135:                return (String) getAttribute(name);
136:            }
137:
138:            /**
139:             * The adapter, used to call the connector
140:             */
141:            public void setAdapter(Adapter adapter) {
142:                this .adapter = adapter;
143:            }
144:
145:            public Adapter getAdapter() {
146:                return adapter;
147:            }
148:
149:            /** Start the protocol
150:             */
151:            public void init() throws Exception {
152:                endpoint.setName(getName());
153:                endpoint.setHandler(cHandler);
154:
155:                try {
156:                    endpoint.init();
157:                } catch (Exception ex) {
158:                    log.error(sm.getString("ajpprotocol.endpoint.initerror"),
159:                            ex);
160:                    throw ex;
161:                }
162:                if (log.isInfoEnabled()) {
163:                    log.info(sm.getString("ajpprotocol.init", getName()));
164:                }
165:            }
166:
167:            public void start() throws Exception {
168:                if (this .domain != null) {
169:                    try {
170:                        tpOname = new ObjectName(domain + ":"
171:                                + "type=ThreadPool,name=" + getName());
172:                        Registry.getRegistry(null, null).registerComponent(
173:                                endpoint, tpOname, null);
174:                    } catch (Exception e) {
175:                        log.error("Can't register threadpool");
176:                    }
177:                    rgOname = new ObjectName(domain
178:                            + ":type=GlobalRequestProcessor,name=" + getName());
179:                    Registry.getRegistry(null, null).registerComponent(
180:                            cHandler.global, rgOname, null);
181:                }
182:
183:                try {
184:                    endpoint.start();
185:                } catch (Exception ex) {
186:                    log.error(sm.getString("ajpprotocol.endpoint.starterror"),
187:                            ex);
188:                    throw ex;
189:                }
190:                if (log.isInfoEnabled())
191:                    log.info(sm.getString("ajpprotocol.start", getName()));
192:            }
193:
194:            public void pause() throws Exception {
195:                try {
196:                    endpoint.pause();
197:                } catch (Exception ex) {
198:                    log.error(sm.getString("ajpprotocol.endpoint.pauseerror"),
199:                            ex);
200:                    throw ex;
201:                }
202:                if (log.isInfoEnabled())
203:                    log.info(sm.getString("ajpprotocol.pause", getName()));
204:            }
205:
206:            public void resume() throws Exception {
207:                try {
208:                    endpoint.resume();
209:                } catch (Exception ex) {
210:                    log.error(sm.getString("ajpprotocol.endpoint.resumeerror"),
211:                            ex);
212:                    throw ex;
213:                }
214:                if (log.isInfoEnabled())
215:                    log.info(sm.getString("ajpprotocol.resume", getName()));
216:            }
217:
218:            public void destroy() throws Exception {
219:                if (log.isInfoEnabled())
220:                    log.info(sm.getString("ajpprotocol.stop", getName()));
221:                endpoint.destroy();
222:                if (tpOname != null)
223:                    Registry.getRegistry(null, null).unregisterComponent(
224:                            tpOname);
225:                if (rgOname != null)
226:                    Registry.getRegistry(null, null).unregisterComponent(
227:                            rgOname);
228:            }
229:
230:            // *
231:            public String getName() {
232:                String encodedAddr = "";
233:                if (getAddress() != null) {
234:                    encodedAddr = "" + getAddress();
235:                    if (encodedAddr.startsWith("/"))
236:                        encodedAddr = encodedAddr.substring(1);
237:                    encodedAddr = URLEncoder.encode(encodedAddr) + "-";
238:                }
239:                return ("ajp-" + encodedAddr + endpoint.getPort());
240:            }
241:
242:            /**
243:             * Processor cache.
244:             */
245:            protected int processorCache = -1;
246:
247:            public int getProcessorCache() {
248:                return this .processorCache;
249:            }
250:
251:            public void setProcessorCache(int processorCache) {
252:                this .processorCache = processorCache;
253:            }
254:
255:            public Executor getExecutor() {
256:                return endpoint.getExecutor();
257:            }
258:
259:            public void setExecutor(Executor executor) {
260:                endpoint.setExecutor(executor);
261:            }
262:
263:            public int getMaxThreads() {
264:                return endpoint.getMaxThreads();
265:            }
266:
267:            public void setMaxThreads(int maxThreads) {
268:                endpoint.setMaxThreads(maxThreads);
269:            }
270:
271:            public int getThreadPriority() {
272:                return endpoint.getThreadPriority();
273:            }
274:
275:            public void setThreadPriority(int threadPriority) {
276:                endpoint.setThreadPriority(threadPriority);
277:            }
278:
279:            public int getBacklog() {
280:                return endpoint.getBacklog();
281:            }
282:
283:            public void setBacklog(int backlog) {
284:                endpoint.setBacklog(backlog);
285:            }
286:
287:            public int getPort() {
288:                return endpoint.getPort();
289:            }
290:
291:            public void setPort(int port) {
292:                endpoint.setPort(port);
293:            }
294:
295:            public InetAddress getAddress() {
296:                return endpoint.getAddress();
297:            }
298:
299:            public void setAddress(InetAddress ia) {
300:                endpoint.setAddress(ia);
301:            }
302:
303:            public boolean getTcpNoDelay() {
304:                return endpoint.getTcpNoDelay();
305:            }
306:
307:            public void setTcpNoDelay(boolean tcpNoDelay) {
308:                endpoint.setTcpNoDelay(tcpNoDelay);
309:            }
310:
311:            public int getSoLinger() {
312:                return endpoint.getSoLinger();
313:            }
314:
315:            public void setSoLinger(int soLinger) {
316:                endpoint.setSoLinger(soLinger);
317:            }
318:
319:            public int getSoTimeout() {
320:                return endpoint.getSoTimeout();
321:            }
322:
323:            public void setSoTimeout(int soTimeout) {
324:                endpoint.setSoTimeout(soTimeout);
325:            }
326:
327:            /**
328:             * Should authentication be done in the native webserver layer, 
329:             * or in the Servlet container ?
330:             */
331:            protected boolean tomcatAuthentication = true;
332:
333:            public boolean getTomcatAuthentication() {
334:                return tomcatAuthentication;
335:            }
336:
337:            public void setTomcatAuthentication(boolean tomcatAuthentication) {
338:                this .tomcatAuthentication = tomcatAuthentication;
339:            }
340:
341:            /**
342:             * Required secret.
343:             */
344:            protected String requiredSecret = null;
345:
346:            public void setRequiredSecret(String requiredSecret) {
347:                this .requiredSecret = requiredSecret;
348:            }
349:
350:            /**
351:             * AJP packet size.
352:             */
353:            protected int packetSize = Constants.MAX_PACKET_SIZE;
354:
355:            public int getPacketSize() {
356:                return packetSize;
357:            }
358:
359:            public void setPacketSize(int packetSize) {
360:                this .packetSize = packetSize;
361:            }
362:
363:            /**
364:             * The number of seconds Tomcat will wait for a subsequent request
365:             * before closing the connection.
366:             */
367:            protected int keepAliveTimeout = -1;
368:
369:            public int getKeepAliveTimeout() {
370:                return keepAliveTimeout;
371:            }
372:
373:            public void setKeepAliveTimeout(int timeout) {
374:                keepAliveTimeout = timeout;
375:            }
376:
377:            // --------------------------------------  AjpConnectionHandler Inner Class
378:
379:            protected static class AjpConnectionHandler implements  Handler {
380:
381:                protected AjpProtocol proto;
382:                protected AtomicLong registerCount = new AtomicLong(0);
383:                protected RequestGroupInfo global = new RequestGroupInfo();
384:
385:                protected ConcurrentLinkedQueue<AjpProcessor> recycledProcessors = new ConcurrentLinkedQueue<AjpProcessor>() {
386:                    protected AtomicInteger size = new AtomicInteger(0);
387:
388:                    public boolean offer(AjpProcessor processor) {
389:                        boolean offer = (proto.processorCache == -1) ? true
390:                                : (size.get() < proto.processorCache);
391:                        //avoid over growing our cache or add after we have stopped
392:                        boolean result = false;
393:                        if (offer) {
394:                            result = super .offer(processor);
395:                            if (result) {
396:                                size.incrementAndGet();
397:                            }
398:                        }
399:                        if (!result)
400:                            unregister(processor);
401:                        return result;
402:                    }
403:
404:                    public AjpProcessor poll() {
405:                        AjpProcessor result = super .poll();
406:                        if (result != null) {
407:                            size.decrementAndGet();
408:                        }
409:                        return result;
410:                    }
411:
412:                    public void clear() {
413:                        AjpProcessor next = poll();
414:                        while (next != null) {
415:                            unregister(next);
416:                            next = poll();
417:                        }
418:                        super .clear();
419:                        size.set(0);
420:                    }
421:                };
422:
423:                public AjpConnectionHandler(AjpProtocol proto) {
424:                    this .proto = proto;
425:                }
426:
427:                public boolean process(Socket socket) {
428:                    AjpProcessor processor = recycledProcessors.poll();
429:                    try {
430:
431:                        if (processor == null) {
432:                            processor = createProcessor();
433:                        }
434:
435:                        if (processor instanceof  ActionHook) {
436:                            ((ActionHook) processor).action(
437:                                    ActionCode.ACTION_START, null);
438:                        }
439:
440:                        return processor.process(socket);
441:
442:                    } catch (java.net.SocketException e) {
443:                        // SocketExceptions are normal
444:                        AjpProtocol.log
445:                                .debug(
446:                                        sm
447:                                                .getString("ajpprotocol.proto.socketexception.debug"),
448:                                        e);
449:                    } catch (java.io.IOException e) {
450:                        // IOExceptions are normal
451:                        AjpProtocol.log
452:                                .debug(
453:                                        sm
454:                                                .getString("ajpprotocol.proto.ioexception.debug"),
455:                                        e);
456:                    }
457:                    // Future developers: if you discover any other
458:                    // rare-but-nonfatal exceptions, catch them here, and log as
459:                    // above.
460:                    catch (Throwable e) {
461:                        // any other exception or error is odd. Here we log it
462:                        // with "ERROR" level, so it will show up even on
463:                        // less-than-verbose logs.
464:                        AjpProtocol.log.error(sm
465:                                .getString("ajpprotocol.proto.error"), e);
466:                    } finally {
467:                        if (processor instanceof  ActionHook) {
468:                            ((ActionHook) processor).action(
469:                                    ActionCode.ACTION_STOP, null);
470:                        }
471:                        recycledProcessors.offer(processor);
472:                    }
473:                    return false;
474:                }
475:
476:                protected AjpProcessor createProcessor() {
477:                    AjpProcessor processor = new AjpProcessor(proto.packetSize,
478:                            proto.endpoint);
479:                    processor.setAdapter(proto.adapter);
480:                    processor
481:                            .setTomcatAuthentication(proto.tomcatAuthentication);
482:                    processor.setRequiredSecret(proto.requiredSecret);
483:                    processor.setKeepAliveTimeout(proto.keepAliveTimeout);
484:                    register(processor);
485:                    return processor;
486:                }
487:
488:                protected void register(AjpProcessor processor) {
489:                    if (proto.getDomain() != null) {
490:                        synchronized (this ) {
491:                            try {
492:                                long count = registerCount.incrementAndGet();
493:                                RequestInfo rp = processor.getRequest()
494:                                        .getRequestProcessor();
495:                                rp.setGlobalProcessor(global);
496:                                ObjectName rpName = new ObjectName(proto
497:                                        .getDomain()
498:                                        + ":type=RequestProcessor,worker="
499:                                        + proto.getName()
500:                                        + ",name=AjpRequest"
501:                                        + count);
502:                                if (log.isDebugEnabled()) {
503:                                    log.debug("Register " + rpName);
504:                                }
505:                                Registry.getRegistry(null, null)
506:                                        .registerComponent(rp, rpName, null);
507:                                rp.setRpName(rpName);
508:                            } catch (Exception e) {
509:                                log.warn("Error registering request");
510:                            }
511:                        }
512:                    }
513:                }
514:
515:                protected void unregister(AjpProcessor processor) {
516:                    if (proto.getDomain() != null) {
517:                        synchronized (this ) {
518:                            try {
519:                                RequestInfo rp = processor.getRequest()
520:                                        .getRequestProcessor();
521:                                rp.setGlobalProcessor(null);
522:                                ObjectName rpName = rp.getRpName();
523:                                if (log.isDebugEnabled()) {
524:                                    log.debug("Unregister " + rpName);
525:                                }
526:                                Registry.getRegistry(null, null)
527:                                        .unregisterComponent(rpName);
528:                                rp.setRpName(null);
529:                            } catch (Exception e) {
530:                                log.warn("Error unregistering request", e);
531:                            }
532:                        }
533:                    }
534:                }
535:
536:            }
537:
538:            // -------------------- Various implementation classes --------------------
539:
540:            protected String domain;
541:            protected ObjectName oname;
542:            protected MBeanServer mserver;
543:
544:            public ObjectName getObjectName() {
545:                return oname;
546:            }
547:
548:            public String getDomain() {
549:                return domain;
550:            }
551:
552:            public ObjectName preRegister(MBeanServer server, ObjectName name)
553:                    throws Exception {
554:                oname = name;
555:                mserver = server;
556:                domain = name.getDomain();
557:                return name;
558:            }
559:
560:            public void postRegister(Boolean registrationDone) {
561:            }
562:
563:            public void preDeregister() throws Exception {
564:            }
565:
566:            public void postDeregister() {
567:            }
568:
569:        }
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