Source Code Cross Referenced for JDBCAccessLogValve.java in  » Sevlet-Container » tomcat-catalina » org » apache » catalina » valves » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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


001:        /*
002:         * Copyright 1999-2001,2004 The Apache Software Foundation.
003:         * 
004:         * Licensed under the Apache License, Version 2.0 (the "License");
005:         * you may not use this file except in compliance with the License.
006:         * You may obtain a copy of the License at
007:         * 
008:         *      http://www.apache.org/licenses/LICENSE-2.0
009:         * 
010:         * Unless required by applicable law or agreed to in writing, software
011:         * distributed under the License is distributed on an "AS IS" BASIS,
012:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013:         * See the License for the specific language governing permissions and
014:         * limitations under the License.
015:         */
016:
017:        package org.apache.catalina.valves;
018:
019:        import java.io.IOException;
020:        import java.sql.Connection;
021:        import java.sql.Driver;
022:        import java.sql.PreparedStatement;
023:        import java.sql.SQLException;
024:        import java.sql.Timestamp;
025:        import java.util.Properties;
026:
027:        import javax.servlet.ServletException;
028:        import javax.servlet.ServletRequest;
029:        import javax.servlet.http.HttpServletRequest;
030:
031:        import org.apache.catalina.HttpResponse;
032:        import org.apache.catalina.Lifecycle;
033:        import org.apache.catalina.LifecycleException;
034:        import org.apache.catalina.LifecycleListener;
035:        import org.apache.catalina.Request;
036:        import org.apache.catalina.Response;
037:        import org.apache.catalina.ValveContext;
038:        import org.apache.catalina.util.LifecycleSupport;
039:        import org.apache.catalina.util.StringManager;
040:        import org.apache.catalina.Logger;
041:
042:        /**
043:         * <p>
044:         * This Tomcat extension logs server access directly to a database, and can 
045:         * be used instead of the regular file-based access log implemented in 
046:         * AccessLogValve.
047:         * To use, copy into the server/classes directory of the Tomcat installation
048:         * and configure in server.xml as:
049:         * <pre>
050:         * 		&lt;Valve className="AccessLogDBValve"
051:         *        	driverName="<i>your_jdbc_driver</i>"
052:         *        	connectionURL="<i>your_jdbc_url</i>"
053:         *        	pattern="combined" resolveHosts="false"
054:         * 		/&gt;
055:         * </pre>
056:         * </p>
057:         * <p>
058:         * Many parameters can be configured, such as the database connection (with
059:         * <code>driverName</code> and <code>connectionURL</code>),
060:         * the table name (<code>tableName</code>)
061:         * and the field names (corresponding to the get/set method names).
062:         * The same options as AccessLogValve are supported, such as
063:         * <code>resolveHosts</code> and <code>pattern</code> ("common" or "combined" 
064:         * only).
065:         * </p>
066:         * <p>
067:         * When Tomcat is started, a database connection (with autoReconnect option)
068:         * is created and used for all the log activity. When Tomcat is shutdown, the
069:         * database connection is closed.
070:         * This logger can be used at the level of the Engine context (being shared
071:         * by all the defined hosts) or the Host context (one instance of the logger 
072:         * per host, possibly using different databases).
073:         * </p>
074:         * <p>
075:         * The database table can be created with the following command:
076:         * </p>
077:         * <pre>
078:         * CREATE TABLE access (
079:         * id INT UNSIGNED AUTO_INCREMENT NOT NULL,
080:         * ts TIMESTAMP NOT NULL,
081:         * remoteHost CHAR(15) NOT NULL,
082:         * user CHAR(15),
083:         * timestamp TIMESTAMP NOT NULL,
084:         * virtualHost VARCHAR(64) NOT NULL,
085:         * method VARCHAR(8) NOT NULL,
086:         * query VARCHAR(255) NOT NULL,
087:         * status SMALLINT UNSIGNED NOT NULL,
088:         * bytes INT UNSIGNED NOT NULL,
089:         * referer VARCHAR(128),
090:         * userAgent VARCHAR(128),
091:         * PRIMARY KEY (id),
092:         * INDEX (ts),
093:         * INDEX (remoteHost),
094:         * INDEX (virtualHost),
095:         * INDEX (query),
096:         * INDEX (userAgent)
097:         * );
098:         * </pre>
099:         * <p>
100:         * If the table is created as above, its name and the field names don't need 
101:         * to be defined.
102:         * </p>
103:         * <p>
104:         * If the request method is "common", only these fields are used:
105:         * <code>remoteHost, user, timeStamp, query, status, bytes</code>
106:         * </p>
107:         * <p>
108:         * <i>TO DO: provide option for excluding logging of certain MIME types.</i>
109:         * </p>
110:         * 
111:         * @author Andre de Jesus
112:         * @author Peter Rossbach
113:         */
114:
115:        public final class JDBCAccessLogValve extends ValveBase implements 
116:                Lifecycle {
117:
118:            // ----------------------------------------------------------- Constructors
119:
120:            /**
121:             * Class constructor. Initializes the fields with the default values.
122:             * The defaults are:
123:             * <pre>
124:             * 		driverName = null;
125:             * 		connectionURL = null;
126:             * 		tableName = "access";
127:             * 		remoteHostField = "remoteHost";
128:             * 		userField = "user";
129:             * 		timestampField = "timestamp";
130:             * 		virtualHostField = "virtualHost";
131:             * 		methodField = "method";
132:             * 		queryField = "query";
133:             * 		statusField = "status";
134:             * 		bytesField = "bytes";
135:             * 		refererField = "referer";
136:             * 		userAgentField = "userAgent";
137:             * 		pattern = "common";
138:             * 		resolveHosts = false;
139:             * </pre>
140:             */
141:            public JDBCAccessLogValve() {
142:                super ();
143:                driverName = null;
144:                connectionURL = null;
145:                tableName = "access";
146:                remoteHostField = "remoteHost";
147:                userField = "user";
148:                timestampField = "timestamp";
149:                virtualHostField = "virtualHost";
150:                methodField = "method";
151:                queryField = "query";
152:                statusField = "status";
153:                bytesField = "bytes";
154:                refererField = "referer";
155:                userAgentField = "userAgent";
156:                pattern = "common";
157:                resolveHosts = false;
158:                conn = null;
159:                ps = null;
160:                currentTimeMillis = new java.util.Date().getTime();
161:            }
162:
163:            // ----------------------------------------------------- Instance Variables
164:
165:            /**
166:             * The connection username to use when trying to connect to the database.
167:             */
168:            protected String connectionName = null;
169:
170:            /**
171:             * The connection URL to use when trying to connect to the database.
172:             */
173:            protected String connectionPassword = null;
174:
175:            /**
176:             * Instance of the JDBC Driver class we use as a connection factory.
177:             */
178:            protected Driver driver = null;
179:
180:            private String driverName;
181:            private String connectionURL;
182:            private String tableName;
183:            private String remoteHostField;
184:            private String userField;
185:            private String timestampField;
186:            private String virtualHostField;
187:            private String methodField;
188:            private String queryField;
189:            private String statusField;
190:            private String bytesField;
191:            private String refererField;
192:            private String userAgentField;
193:            private String pattern;
194:            private boolean resolveHosts;
195:
196:            private Connection conn;
197:            private PreparedStatement ps;
198:
199:            private long currentTimeMillis;
200:
201:            /**
202:             * The descriptive information about this implementation.
203:             */
204:            protected static String info = "org.apache.catalina.valves.JDBCAccessLogValve/1.0";
205:
206:            /**
207:             * The lifecycle event support for this component.
208:             */
209:            protected LifecycleSupport lifecycle = new LifecycleSupport(this );
210:
211:            /**
212:             * The string manager for this package.
213:             */
214:            private StringManager sm = StringManager
215:                    .getManager(Constants.Package);
216:
217:            /**
218:             * Has this component been started yet?
219:             */
220:            private boolean started = false;
221:
222:            // ------------------------------------------------------------- Properties
223:
224:            /**
225:             * Return the username to use to connect to the database.
226:             *
227:             */
228:            public String getConnectionName() {
229:                return connectionName;
230:            }
231:
232:            /**
233:             * Set the username to use to connect to the database.
234:             *
235:             * @param connectionName Username
236:             */
237:            public void setConnectionName(String connectionName) {
238:                this .connectionName = connectionName;
239:            }
240:
241:            /**
242:             * Sets the database driver name.
243:             * 
244:             * @param driverName The complete name of the database driver class.
245:             */
246:            public void setDriverName(String driverName) {
247:                this .driverName = driverName;
248:            }
249:
250:            /**
251:             * Return the password to use to connect to the database.
252:             *
253:             */
254:            public String getConnectionPassword() {
255:                return connectionPassword;
256:            }
257:
258:            /**
259:             * Set the password to use to connect to the database.
260:             *
261:             * @param connectionPassword User password
262:             */
263:            public void setConnectionPassword(String connectionPassword) {
264:                this .connectionPassword = connectionPassword;
265:            }
266:
267:            /**
268:             * Sets the JDBC URL for the database where the log is stored.
269:             * 
270:             * @param connectionURL The JDBC URL of the database.
271:             */
272:            public void setConnectionURL(String connectionURL) {
273:                this .connectionURL = connectionURL;
274:            }
275:
276:            /**
277:             * Sets the name of the table where the logs are stored.
278:             * 
279:             * @param tableName The name of the table.
280:             */
281:            public void setTableName(String tableName) {
282:                this .tableName = tableName;
283:            }
284:
285:            /**
286:             * Sets the name of the field containing the remote host.
287:             * 
288:             * @param remoteHostField The name of the remote host field.
289:             */
290:            public void setRemoteHostField(String remoteHostField) {
291:                this .remoteHostField = remoteHostField;
292:            }
293:
294:            /**
295:             * Sets the name of the field containing the remote user name.
296:             * 
297:             * @param userField The name of the remote user field.
298:             */
299:            public void setUserField(String userField) {
300:                this .userField = userField;
301:            }
302:
303:            /**
304:             * Sets the name of the field containing the server-determined timestamp.
305:             * 
306:             * @param timestampField The name of the server-determined timestamp field.
307:             */
308:            public void setTimestampField(String timestampField) {
309:                this .timestampField = timestampField;
310:            }
311:
312:            /**
313:             * Sets the name of the field containing the virtual host information 
314:             * (this is in fact the server name).
315:             * 
316:             * @param virtualHostField The name of the virtual host field.
317:             */
318:            public void setVirtualHostField(String virtualHostField) {
319:                this .virtualHostField = virtualHostField;
320:            }
321:
322:            /**
323:             * Sets the name of the field containing the HTTP request method.
324:             * 
325:             * @param methodField The name of the HTTP request method field.
326:             */
327:            public void setMethodField(String methodField) {
328:                this .methodField = methodField;
329:            }
330:
331:            /**
332:             * Sets the name of the field containing the URL part of the HTTP query.
333:             * 
334:             * @param queryField The name of the field containing the URL part of 
335:             * the HTTP query.
336:             */
337:            public void setQueryField(String queryField) {
338:                this .queryField = queryField;
339:            }
340:
341:            /**
342:             * Sets the name of the field containing the HTTP response status code.
343:             * 
344:             * @param statusField The name of the HTTP response status code field.
345:             */
346:            public void setStatusField(String statusField) {
347:                this .statusField = statusField;
348:            }
349:
350:            /**
351:             * Sets the name of the field containing the number of bytes returned.
352:             * 
353:             * @param bytesField The name of the returned bytes field.
354:             */
355:            public void setBytesField(String bytesField) {
356:                this .bytesField = bytesField;
357:            }
358:
359:            /**
360:             * Sets the name of the field containing the referer.
361:             * 
362:             * @param refererField The referer field name.
363:             */
364:            public void setRefererField(String refererField) {
365:                this .refererField = refererField;
366:            }
367:
368:            /**
369:             * Sets the name of the field containing the user agent.
370:             * 
371:             * @param userAgentField The name of the user agent field.
372:             */
373:            public void setUserAgentField(String userAgentField) {
374:                this .userAgentField = userAgentField;
375:            }
376:
377:            /**
378:             * Sets the logging pattern. The patterns supported correspond to the 
379:             * file-based "common" and "combined". These are translated into the use 
380:             * of tables containing either set of fields.
381:             * <P><I>TO DO: more flexible field choices.</I></P>
382:             * 
383:             * @param pattern The name of the logging pattern.
384:             */
385:            public void setPattern(String pattern) {
386:                this .pattern = pattern;
387:            }
388:
389:            /**
390:             * Determines whether IP host name resolution is done.
391:             * 
392:             * @param resolveHosts "true" or "false", if host IP resolution 
393:             * is desired or not.
394:             */
395:            public void setResolveHosts(String resolveHosts) {
396:                this .resolveHosts = new Boolean(resolveHosts).booleanValue();
397:            }
398:
399:            // --------------------------------------------------------- Public Methods
400:
401:            /**
402:             * This method is invoked by Tomcat on each query.
403:             * 
404:             * @param request The Request object.
405:             * @param response The Response object.
406:             * @param context The ValveContext object.
407:             * @exception IOException Should not be thrown.
408:             * @exception ServletException Database SQLException is wrapped 
409:             * in a ServletException.
410:             */
411:            public void invoke(Request request, Response response,
412:                    ValveContext context) throws IOException, ServletException {
413:
414:                context.invokeNext(request, response);
415:
416:                ServletRequest req = request.getRequest();
417:                HttpServletRequest hreq = null;
418:                if (req instanceof  HttpServletRequest)
419:                    hreq = (HttpServletRequest) req;
420:                String remoteHost = "";
421:                if (resolveHosts)
422:                    remoteHost = req.getRemoteHost();
423:                else
424:                    remoteHost = req.getRemoteAddr();
425:                String user = "";
426:                if (hreq != null)
427:                    user = hreq.getRemoteUser();
428:                String query = "";
429:                if (hreq != null)
430:                    query = hreq.getRequestURI();
431:                int bytes = response.getContentCount();
432:                if (bytes < 0)
433:                    bytes = 0;
434:                int status = ((HttpResponse) response).getStatus();
435:                if (pattern.equals("combined")) {
436:                    String virtualHost = "";
437:                    if (hreq != null)
438:                        virtualHost = hreq.getServerName();
439:                    String method = "";
440:                    if (hreq != null)
441:                        method = hreq.getMethod();
442:                    String referer = "";
443:                    if (hreq != null)
444:                        referer = hreq.getHeader("referer");
445:                    String userAgent = "";
446:                    if (hreq != null)
447:                        userAgent = hreq.getHeader("user-agent");
448:                }
449:                synchronized (this ) {
450:                    int numberOfTries = 2;
451:                    while (numberOfTries > 0) {
452:                        try {
453:                            open();
454:
455:                            ps.setString(1, remoteHost);
456:                            ps.setString(2, user);
457:                            ps.setTimestamp(3, new Timestamp(
458:                                    getCurrentTimeMillis()));
459:                            ps.setString(4, query);
460:                            ps.setInt(5, status);
461:                            ps.setInt(6, bytes);
462:                            if (pattern.equals("combined")) {
463:
464:                                String virtualHost = "";
465:                                if (hreq != null)
466:                                    virtualHost = hreq.getServerName();
467:                                String method = "";
468:                                if (hreq != null)
469:                                    method = hreq.getMethod();
470:                                String referer = "";
471:                                if (hreq != null)
472:                                    referer = hreq.getHeader("referer");
473:                                String userAgent = "";
474:                                if (hreq != null)
475:                                    userAgent = hreq.getHeader("user-agent");
476:                                ps.setString(7, virtualHost);
477:                                ps.setString(8, method);
478:                                ps.setString(9, referer);
479:                                ps.setString(10, userAgent);
480:                            }
481:                            ps.executeUpdate();
482:                            return;
483:                        } catch (SQLException e) {
484:                            // Log the problem for posterity
485:                            log(sm.getString("jdbcAccessLogValve.exception"), e);
486:
487:                            // Close the connection so that it gets reopened next time
488:                            if (conn != null)
489:                                close();
490:                        }
491:                        numberOfTries--;
492:                    }
493:                }
494:
495:            }
496:
497:            /**
498:             * Adds a Lifecycle listener.
499:             * 
500:             * @param listener The listener to add.
501:             */
502:            public void addLifecycleListener(LifecycleListener listener) {
503:
504:                lifecycle.addLifecycleListener(listener);
505:
506:            }
507:
508:            /**
509:             * Get the lifecycle listeners associated with this lifecycle. If this 
510:             * Lifecycle has no listeners registered, a zero-length array is returned.
511:             */
512:            public LifecycleListener[] findLifecycleListeners() {
513:
514:                return lifecycle.findLifecycleListeners();
515:
516:            }
517:
518:            /**
519:             * Removes a Lifecycle listener.
520:             * 
521:             * @param listener The listener to remove.
522:             */
523:            public void removeLifecycleListener(LifecycleListener listener) {
524:
525:                lifecycle.removeLifecycleListener(listener);
526:
527:            }
528:
529:            /**
530:             * Open (if necessary) and return a database connection for use by
531:             * this AccessLogValve.
532:             *
533:             * @exception SQLException if a database error occurs
534:             */
535:            protected void open() throws SQLException {
536:
537:                // Do nothing if there is a database connection already open
538:                if (conn != null)
539:                    return;
540:
541:                // Instantiate our database driver if necessary
542:                if (driver == null) {
543:                    try {
544:                        Class clazz = Class.forName(driverName);
545:                        driver = (Driver) clazz.newInstance();
546:                    } catch (Throwable e) {
547:                        throw new SQLException(e.getMessage());
548:                    }
549:                }
550:
551:                // Open a new connection
552:                Properties props = new Properties();
553:                props.put("autoReconnect", "true");
554:                if (connectionName != null)
555:                    props.put("user", connectionName);
556:                if (connectionPassword != null)
557:                    props.put("password", connectionPassword);
558:                conn = driver.connect(connectionURL, props);
559:                conn.setAutoCommit(true);
560:                if (pattern.equals("common")) {
561:                    ps = conn.prepareStatement("INSERT INTO " + tableName
562:                            + " (" + remoteHostField + ", " + userField + ", "
563:                            + timestampField + ", " + queryField + ", "
564:                            + statusField + ", " + bytesField
565:                            + ") VALUES(?, ?, ?, ?, ?, ?)");
566:                } else if (pattern.equals("combined")) {
567:                    ps = conn.prepareStatement("INSERT INTO " + tableName
568:                            + " (" + remoteHostField + ", " + userField + ", "
569:                            + timestampField + ", " + queryField + ", "
570:                            + statusField + ", " + bytesField + ", "
571:                            + virtualHostField + ", " + methodField + ", "
572:                            + refererField + ", " + userAgentField
573:                            + ") VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?)");
574:                }
575:            }
576:
577:            /**
578:             * Close the specified database connection.
579:             */
580:            protected void close() {
581:
582:                // Do nothing if the database connection is already closed
583:                if (conn == null)
584:                    return;
585:
586:                // Close our prepared statements (if any)
587:                try {
588:                    ps.close();
589:                } catch (Throwable f) {
590:                    ;
591:                }
592:                this .ps = null;
593:
594:                // Close this database connection, and log any errors
595:                try {
596:                    conn.close();
597:                } catch (SQLException e) {
598:                    log(sm.getString("jdbcAccessLogValeve.close"), e); // Just log it here            
599:                } finally {
600:                    this .conn = null;
601:                }
602:
603:            }
604:
605:            /**
606:             * Invoked by Tomcat on startup. The database connection is set here.
607:             * 
608:             * @exception LifecycleException Can be thrown on lifecycle 
609:             * inconsistencies or on database errors (as a wrapped SQLException).
610:             */
611:            public void start() throws LifecycleException {
612:
613:                if (started)
614:                    throw new LifecycleException(sm
615:                            .getString("accessLogValve.alreadyStarted"));
616:                lifecycle.fireLifecycleEvent(START_EVENT, null);
617:                started = true;
618:
619:                try {
620:                    open();
621:                } catch (SQLException e) {
622:                    throw new LifecycleException(e);
623:                }
624:
625:            }
626:
627:            /**
628:             * Invoked by tomcat on shutdown. The database connection is closed here.
629:             * 
630:             * @exception LifecycleException Can be thrown on lifecycle 
631:             * inconsistencies or on database errors (as a wrapped SQLException).
632:             */
633:            public void stop() throws LifecycleException {
634:
635:                if (!started)
636:                    throw new LifecycleException(sm
637:                            .getString("accessLogValve.notStarted"));
638:                lifecycle.fireLifecycleEvent(STOP_EVENT, null);
639:                started = false;
640:
641:                close();
642:
643:            }
644:
645:            public long getCurrentTimeMillis() {
646:                long systime = System.currentTimeMillis();
647:                if ((systime - currentTimeMillis) > 1000) {
648:                    currentTimeMillis = new java.util.Date(systime).getTime();
649:                }
650:                return currentTimeMillis;
651:            }
652:
653:            /**
654:             * Log a message on the Logger associated with our Container (if any)
655:             *
656:             * @param message Message to be logged
657:             */
658:            protected void log(String message) {
659:
660:                Logger logger = null;
661:                String name = null;
662:                if (container != null) {
663:                    logger = container.getLogger();
664:                    name = container.getName();
665:                }
666:
667:                if (logger != null) {
668:                    logger.log(connectionURL + "[" + name + "]: " + message);
669:                } else {
670:                    System.out.println(connectionURL + "[" + name + "]: "
671:                            + message);
672:                }
673:
674:            }
675:
676:            /**
677:             * Log a message on the Logger associated with our Container (if any)
678:             *
679:             * @param message Message to be logged
680:             * @param throwable Associated exception
681:             */
682:            protected void log(String message, Throwable throwable) {
683:
684:                Logger logger = null;
685:                String name = null;
686:                if (container != null) {
687:                    logger = container.getLogger();
688:                    name = container.getName();
689:                }
690:
691:                if (logger != null) {
692:                    logger.log(connectionURL + "[" + name + "]: " + message,
693:                            throwable);
694:                } else {
695:                    System.out.println(connectionURL + "[" + name + "]: "
696:                            + message);
697:                    throwable.printStackTrace(System.out);
698:                }
699:            }
700:
701:        }
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