Source Code Cross Referenced for AjpAprProtocol.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.URLEncoder;
022:        import java.util.Hashtable;
023:        import java.util.Iterator;
024:        import java.util.concurrent.ConcurrentLinkedQueue;
025:        import java.util.concurrent.Executor;
026:        import java.util.concurrent.atomic.AtomicInteger;
027:        import java.util.concurrent.atomic.AtomicLong;
028:
029:        import javax.management.MBeanRegistration;
030:        import javax.management.MBeanServer;
031:        import javax.management.ObjectName;
032:
033:        import org.apache.coyote.ActionCode;
034:        import org.apache.coyote.ActionHook;
035:        import org.apache.coyote.Adapter;
036:        import org.apache.coyote.ProtocolHandler;
037:        import org.apache.coyote.RequestGroupInfo;
038:        import org.apache.coyote.RequestInfo;
039:        import org.apache.tomcat.util.modeler.Registry;
040:        import org.apache.tomcat.util.net.AprEndpoint;
041:        import org.apache.tomcat.util.net.SocketStatus;
042:        import org.apache.tomcat.util.net.AprEndpoint.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 AjpAprProtocol implements  ProtocolHandler,
054:                MBeanRegistration {
055:
056:            protected static org.apache.juli.logging.Log log = org.apache.juli.logging.LogFactory
057:                    .getLog(AjpAprProtocol.class);
058:
059:            /**
060:             * The string manager for this package.
061:             */
062:            protected static StringManager sm = StringManager
063:                    .getManager(Constants.Package);
064:
065:            // ------------------------------------------------------------ Constructor
066:
067:            public AjpAprProtocol() {
068:                cHandler = new AjpConnectionHandler(this );
069:                setSoLinger(Constants.DEFAULT_CONNECTION_LINGER);
070:                setSoTimeout(Constants.DEFAULT_CONNECTION_TIMEOUT);
071:                //setServerSoTimeout(Constants.DEFAULT_SERVER_SOCKET_TIMEOUT);
072:                setTcpNoDelay(Constants.DEFAULT_TCP_NO_DELAY);
073:            }
074:
075:            // ----------------------------------------------------- Instance Variables
076:
077:            protected ObjectName tpOname;
078:
079:            protected ObjectName rgOname;
080:
081:            /**
082:             * Associated APR endpoint.
083:             */
084:            protected AprEndpoint endpoint = new AprEndpoint();
085:
086:            /**
087:             * Configuration attributes.
088:             */
089:            protected Hashtable attributes = new Hashtable();
090:
091:            /**
092:             * Adapter which will process the requests recieved by this endpoint.
093:             */
094:            private Adapter adapter;
095:
096:            /**
097:             * Connection handler for AJP.
098:             */
099:            private AjpConnectionHandler cHandler;
100:
101:            // --------------------------------------------------------- Public Methods
102:
103:            /** 
104:             * Pass config info
105:             */
106:            public void setAttribute(String name, Object value) {
107:                if (log.isTraceEnabled()) {
108:                    log.trace(sm.getString("ajpprotocol.setattribute", name,
109:                            value));
110:                }
111:                attributes.put(name, value);
112:            }
113:
114:            public Object getAttribute(String key) {
115:                if (log.isTraceEnabled()) {
116:                    log.trace(sm.getString("ajpprotocol.getattribute", key));
117:                }
118:                return attributes.get(key);
119:            }
120:
121:            public Iterator getAttributeNames() {
122:                return attributes.keySet().iterator();
123:            }
124:
125:            /**
126:             * Set a property.
127:             */
128:            public void setProperty(String name, String value) {
129:                setAttribute(name, value);
130:            }
131:
132:            /**
133:             * Get a property
134:             */
135:            public String getProperty(String name) {
136:                return (String) getAttribute(name);
137:            }
138:
139:            /**
140:             * The adapter, used to call the connector
141:             */
142:            public void setAdapter(Adapter adapter) {
143:                this .adapter = adapter;
144:            }
145:
146:            public Adapter getAdapter() {
147:                return adapter;
148:            }
149:
150:            /** Start the protocol
151:             */
152:            public void init() throws Exception {
153:                endpoint.setName(getName());
154:                endpoint.setHandler(cHandler);
155:                endpoint.setUseSendfile(false);
156:
157:                try {
158:                    endpoint.init();
159:                } catch (Exception ex) {
160:                    log.error(sm.getString("ajpprotocol.endpoint.initerror"),
161:                            ex);
162:                    throw ex;
163:                }
164:                if (log.isInfoEnabled()) {
165:                    log.info(sm.getString("ajpprotocol.init", getName()));
166:                }
167:            }
168:
169:            public void start() throws Exception {
170:                if (this .domain != null) {
171:                    try {
172:                        tpOname = new ObjectName(domain + ":"
173:                                + "type=ThreadPool,name=" + getName());
174:                        Registry.getRegistry(null, null).registerComponent(
175:                                endpoint, tpOname, null);
176:                    } catch (Exception e) {
177:                        log.error("Can't register threadpool");
178:                    }
179:                    rgOname = new ObjectName(domain
180:                            + ":type=GlobalRequestProcessor,name=" + getName());
181:                    Registry.getRegistry(null, null).registerComponent(
182:                            cHandler.global, rgOname, null);
183:                }
184:
185:                try {
186:                    endpoint.start();
187:                } catch (Exception ex) {
188:                    log.error(sm.getString("ajpprotocol.endpoint.starterror"),
189:                            ex);
190:                    throw ex;
191:                }
192:                if (log.isInfoEnabled())
193:                    log.info(sm.getString("ajpprotocol.start", getName()));
194:            }
195:
196:            public void pause() throws Exception {
197:                try {
198:                    endpoint.pause();
199:                } catch (Exception ex) {
200:                    log.error(sm.getString("ajpprotocol.endpoint.pauseerror"),
201:                            ex);
202:                    throw ex;
203:                }
204:                if (log.isInfoEnabled())
205:                    log.info(sm.getString("ajpprotocol.pause", getName()));
206:            }
207:
208:            public void resume() throws Exception {
209:                try {
210:                    endpoint.resume();
211:                } catch (Exception ex) {
212:                    log.error(sm.getString("ajpprotocol.endpoint.resumeerror"),
213:                            ex);
214:                    throw ex;
215:                }
216:                if (log.isInfoEnabled())
217:                    log.info(sm.getString("ajpprotocol.resume", getName()));
218:            }
219:
220:            public void destroy() throws Exception {
221:                if (log.isInfoEnabled())
222:                    log.info(sm.getString("ajpprotocol.stop", getName()));
223:                endpoint.destroy();
224:                if (tpOname != null)
225:                    Registry.getRegistry(null, null).unregisterComponent(
226:                            tpOname);
227:                if (rgOname != null)
228:                    Registry.getRegistry(null, null).unregisterComponent(
229:                            rgOname);
230:            }
231:
232:            // *
233:            public String getName() {
234:                String encodedAddr = "";
235:                if (getAddress() != null) {
236:                    encodedAddr = "" + getAddress();
237:                    if (encodedAddr.startsWith("/"))
238:                        encodedAddr = encodedAddr.substring(1);
239:                    encodedAddr = URLEncoder.encode(encodedAddr) + "-";
240:                }
241:                return ("ajp-" + encodedAddr + endpoint.getPort());
242:            }
243:
244:            /**
245:             * Processor cache.
246:             */
247:            protected int processorCache = -1;
248:
249:            public int getProcessorCache() {
250:                return this .processorCache;
251:            }
252:
253:            public void setProcessorCache(int processorCache) {
254:                this .processorCache = processorCache;
255:            }
256:
257:            public Executor getExecutor() {
258:                return endpoint.getExecutor();
259:            }
260:
261:            public void setExecutor(Executor executor) {
262:                endpoint.setExecutor(executor);
263:            }
264:
265:            public int getMaxThreads() {
266:                return endpoint.getMaxThreads();
267:            }
268:
269:            public void setMaxThreads(int maxThreads) {
270:                endpoint.setMaxThreads(maxThreads);
271:            }
272:
273:            public int getThreadPriority() {
274:                return endpoint.getThreadPriority();
275:            }
276:
277:            public void setThreadPriority(int threadPriority) {
278:                endpoint.setThreadPriority(threadPriority);
279:            }
280:
281:            public int getBacklog() {
282:                return endpoint.getBacklog();
283:            }
284:
285:            public void setBacklog(int backlog) {
286:                endpoint.setBacklog(backlog);
287:            }
288:
289:            public int getPort() {
290:                return endpoint.getPort();
291:            }
292:
293:            public void setPort(int port) {
294:                endpoint.setPort(port);
295:            }
296:
297:            public InetAddress getAddress() {
298:                return endpoint.getAddress();
299:            }
300:
301:            public void setAddress(InetAddress ia) {
302:                endpoint.setAddress(ia);
303:            }
304:
305:            public boolean getTcpNoDelay() {
306:                return endpoint.getTcpNoDelay();
307:            }
308:
309:            public void setTcpNoDelay(boolean tcpNoDelay) {
310:                endpoint.setTcpNoDelay(tcpNoDelay);
311:            }
312:
313:            public int getSoLinger() {
314:                return endpoint.getSoLinger();
315:            }
316:
317:            public void setSoLinger(int soLinger) {
318:                endpoint.setSoLinger(soLinger);
319:            }
320:
321:            public int getSoTimeout() {
322:                return endpoint.getSoTimeout();
323:            }
324:
325:            public void setSoTimeout(int soTimeout) {
326:                endpoint.setSoTimeout(soTimeout);
327:            }
328:
329:            /**
330:             * Should authentication be done in the native webserver layer, 
331:             * or in the Servlet container ?
332:             */
333:            protected boolean tomcatAuthentication = true;
334:
335:            public boolean getTomcatAuthentication() {
336:                return tomcatAuthentication;
337:            }
338:
339:            public void setTomcatAuthentication(boolean tomcatAuthentication) {
340:                this .tomcatAuthentication = tomcatAuthentication;
341:            }
342:
343:            /**
344:             * Required secret.
345:             */
346:            protected String requiredSecret = null;
347:
348:            public void setRequiredSecret(String requiredSecret) {
349:                this .requiredSecret = requiredSecret;
350:            }
351:
352:            /**
353:             * AJP packet size.
354:             */
355:            protected int packetSize = Constants.MAX_PACKET_SIZE;
356:
357:            public int getPacketSize() {
358:                return packetSize;
359:            }
360:
361:            public void setPacketSize(int packetSize) {
362:                this .packetSize = packetSize;
363:            }
364:
365:            /**
366:             * The number of seconds Tomcat will wait for a subsequent request
367:             * before closing the connection.
368:             */
369:            public int getKeepAliveTimeout() {
370:                return endpoint.getKeepAliveTimeout();
371:            }
372:
373:            public void setKeepAliveTimeout(int timeout) {
374:                endpoint.setKeepAliveTimeout(timeout);
375:            }
376:
377:            public boolean getUseSendfile() {
378:                return endpoint.getUseSendfile();
379:            }
380:
381:            public void setUseSendfile(boolean useSendfile) { /* No sendfile for AJP */
382:            }
383:
384:            public int getPollTime() {
385:                return endpoint.getPollTime();
386:            }
387:
388:            public void setPollTime(int pollTime) {
389:                endpoint.setPollTime(pollTime);
390:            }
391:
392:            public void setPollerSize(int pollerSize) {
393:                endpoint.setPollerSize(pollerSize);
394:            }
395:
396:            public int getPollerSize() {
397:                return endpoint.getPollerSize();
398:            }
399:
400:            // --------------------------------------  AjpConnectionHandler Inner Class
401:
402:            protected static class AjpConnectionHandler implements  Handler {
403:
404:                protected AjpAprProtocol proto;
405:                protected AtomicLong registerCount = new AtomicLong(0);
406:                protected RequestGroupInfo global = new RequestGroupInfo();
407:
408:                protected ConcurrentLinkedQueue<AjpAprProcessor> recycledProcessors = new ConcurrentLinkedQueue<AjpAprProcessor>() {
409:                    protected AtomicInteger size = new AtomicInteger(0);
410:
411:                    public boolean offer(AjpAprProcessor processor) {
412:                        boolean offer = (proto.processorCache == -1) ? true
413:                                : (size.get() < proto.processorCache);
414:                        //avoid over growing our cache or add after we have stopped
415:                        boolean result = false;
416:                        if (offer) {
417:                            result = super .offer(processor);
418:                            if (result) {
419:                                size.incrementAndGet();
420:                            }
421:                        }
422:                        if (!result)
423:                            unregister(processor);
424:                        return result;
425:                    }
426:
427:                    public AjpAprProcessor poll() {
428:                        AjpAprProcessor result = super .poll();
429:                        if (result != null) {
430:                            size.decrementAndGet();
431:                        }
432:                        return result;
433:                    }
434:
435:                    public void clear() {
436:                        AjpAprProcessor next = poll();
437:                        while (next != null) {
438:                            unregister(next);
439:                            next = poll();
440:                        }
441:                        super .clear();
442:                        size.set(0);
443:                    }
444:                };
445:
446:                public AjpConnectionHandler(AjpAprProtocol proto) {
447:                    this .proto = proto;
448:                }
449:
450:                // FIXME: Support for this could be added in AJP as well
451:                public SocketState event(long socket, SocketStatus status) {
452:                    return SocketState.CLOSED;
453:                }
454:
455:                public SocketState process(long socket) {
456:                    AjpAprProcessor processor = recycledProcessors.poll();
457:                    try {
458:
459:                        if (processor == null) {
460:                            processor = createProcessor();
461:                        }
462:
463:                        if (processor instanceof  ActionHook) {
464:                            ((ActionHook) processor).action(
465:                                    ActionCode.ACTION_START, null);
466:                        }
467:
468:                        if (processor.process(socket)) {
469:                            return SocketState.OPEN;
470:                        } else {
471:                            return SocketState.CLOSED;
472:                        }
473:
474:                    } catch (java.net.SocketException e) {
475:                        // SocketExceptions are normal
476:                        AjpAprProtocol.log
477:                                .debug(
478:                                        sm
479:                                                .getString("ajpprotocol.proto.socketexception.debug"),
480:                                        e);
481:                    } catch (java.io.IOException e) {
482:                        // IOExceptions are normal
483:                        AjpAprProtocol.log
484:                                .debug(
485:                                        sm
486:                                                .getString("ajpprotocol.proto.ioexception.debug"),
487:                                        e);
488:                    }
489:                    // Future developers: if you discover any other
490:                    // rare-but-nonfatal exceptions, catch them here, and log as
491:                    // above.
492:                    catch (Throwable e) {
493:                        // any other exception or error is odd. Here we log it
494:                        // with "ERROR" level, so it will show up even on
495:                        // less-than-verbose logs.
496:                        AjpAprProtocol.log.error(sm
497:                                .getString("ajpprotocol.proto.error"), e);
498:                    } finally {
499:                        if (processor instanceof  ActionHook) {
500:                            ((ActionHook) processor).action(
501:                                    ActionCode.ACTION_STOP, null);
502:                        }
503:                        recycledProcessors.offer(processor);
504:                    }
505:                    return SocketState.CLOSED;
506:                }
507:
508:                protected AjpAprProcessor createProcessor() {
509:                    AjpAprProcessor processor = new AjpAprProcessor(
510:                            proto.packetSize, proto.endpoint);
511:                    processor.setAdapter(proto.adapter);
512:                    processor
513:                            .setTomcatAuthentication(proto.tomcatAuthentication);
514:                    processor.setRequiredSecret(proto.requiredSecret);
515:                    register(processor);
516:                    return processor;
517:                }
518:
519:                protected void register(AjpAprProcessor processor) {
520:                    if (proto.getDomain() != null) {
521:                        synchronized (this ) {
522:                            try {
523:                                long count = registerCount.incrementAndGet();
524:                                RequestInfo rp = processor.getRequest()
525:                                        .getRequestProcessor();
526:                                rp.setGlobalProcessor(global);
527:                                ObjectName rpName = new ObjectName(proto
528:                                        .getDomain()
529:                                        + ":type=RequestProcessor,worker="
530:                                        + proto.getName()
531:                                        + ",name=AjpRequest"
532:                                        + count);
533:                                if (log.isDebugEnabled()) {
534:                                    log.debug("Register " + rpName);
535:                                }
536:                                Registry.getRegistry(null, null)
537:                                        .registerComponent(rp, rpName, null);
538:                                rp.setRpName(rpName);
539:                            } catch (Exception e) {
540:                                log.warn("Error registering request");
541:                            }
542:                        }
543:                    }
544:                }
545:
546:                protected void unregister(AjpAprProcessor processor) {
547:                    if (proto.getDomain() != null) {
548:                        synchronized (this ) {
549:                            try {
550:                                RequestInfo rp = processor.getRequest()
551:                                        .getRequestProcessor();
552:                                rp.setGlobalProcessor(null);
553:                                ObjectName rpName = rp.getRpName();
554:                                if (log.isDebugEnabled()) {
555:                                    log.debug("Unregister " + rpName);
556:                                }
557:                                Registry.getRegistry(null, null)
558:                                        .unregisterComponent(rpName);
559:                                rp.setRpName(null);
560:                            } catch (Exception e) {
561:                                log.warn("Error unregistering request", e);
562:                            }
563:                        }
564:                    }
565:                }
566:
567:            }
568:
569:            // -------------------- Various implementation classes --------------------
570:
571:            protected String domain;
572:            protected ObjectName oname;
573:            protected MBeanServer mserver;
574:
575:            public ObjectName getObjectName() {
576:                return oname;
577:            }
578:
579:            public String getDomain() {
580:                return domain;
581:            }
582:
583:            public ObjectName preRegister(MBeanServer server, ObjectName name)
584:                    throws Exception {
585:                oname = name;
586:                mserver = server;
587:                domain = name.getDomain();
588:                return name;
589:            }
590:
591:            public void postRegister(Boolean registrationDone) {
592:            }
593:
594:            public void preDeregister() throws Exception {
595:            }
596:
597:            public void postDeregister() {
598:            }
599:
600:        }
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