Source Code Cross Referenced for MemoryUserDatabase.java in  » Sevlet-Container » tomcat-catalina » org » apache » catalina » users » 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.users 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright 2002,2004 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.users;
018:
019:        import java.io.File;
020:        import java.io.FileInputStream;
021:        import java.io.FileOutputStream;
022:        import java.io.IOException;
023:        import java.io.OutputStreamWriter;
024:        import java.io.PrintWriter;
025:        import java.util.HashMap;
026:        import java.util.Iterator;
027:        import org.apache.catalina.Group;
028:        import org.apache.catalina.Role;
029:        import org.apache.catalina.User;
030:        import org.apache.catalina.UserDatabase;
031:        import org.apache.catalina.util.StringManager;
032:        import org.apache.commons.digester.Digester;
033:        import org.apache.commons.digester.ObjectCreationFactory;
034:        import org.xml.sax.Attributes;
035:
036:        /**
037:         * <p>Concrete implementation of {@link UserDatabase} that loads all
038:         * defined users, groups, and roles into an in-memory data structure,
039:         * and uses a specified XML file for its persistent storage.</p>
040:         *
041:         * @author Craig R. McClanahan
042:         * @version $Revision: 1.6 $ $Date: 2004/02/27 14:58:50 $
043:         * @since 4.1
044:         */
045:
046:        public class MemoryUserDatabase implements  UserDatabase {
047:
048:            // ----------------------------------------------------------- Constructors
049:
050:            /**
051:             * Create a new instance with default values.
052:             */
053:            public MemoryUserDatabase() {
054:
055:                super ();
056:
057:            }
058:
059:            /**
060:             * Create a new instance with the specified values.
061:             *
062:             * @param id Unique global identifier of this user database
063:             */
064:            public MemoryUserDatabase(String id) {
065:
066:                super ();
067:                this .id = id;
068:
069:            }
070:
071:            // ----------------------------------------------------- Instance Variables
072:
073:            /**
074:             * The set of {@link Group}s defined in this database, keyed by
075:             * group name.
076:             */
077:            protected HashMap groups = new HashMap();
078:
079:            /**
080:             * The unique global identifier of this user database.
081:             */
082:            protected String id = null;
083:
084:            /**
085:             * The relative (to <code>catalina.base</code>) or absolute pathname to
086:             * the XML file in which we will save our persistent information.
087:             */
088:            protected String pathname = "conf/tomcat-users.xml";
089:
090:            /**
091:             * The relative or absolute pathname to the file in which our old
092:             * information is stored while renaming is in progress.
093:             */
094:            protected String pathnameOld = pathname + ".old";
095:
096:            /**
097:             * The relative or absolute pathname ot the file in which we write
098:             * our new information prior to renaming.
099:             */
100:            protected String pathnameNew = pathname + ".new";
101:
102:            /**
103:             * The set of {@link Role}s defined in this database, keyed by
104:             * role name.
105:             */
106:            protected HashMap roles = new HashMap();
107:
108:            /**
109:             * The string manager for this package.
110:             */
111:            private static StringManager sm = StringManager
112:                    .getManager(Constants.Package);
113:
114:            /**
115:             * The set of {@link User}s defined in this database, keyed by
116:             * user name.
117:             */
118:            protected HashMap users = new HashMap();
119:
120:            // ------------------------------------------------------------- Properties
121:
122:            /**
123:             * Return the set of {@link Group}s defined in this user database.
124:             */
125:            public Iterator getGroups() {
126:
127:                synchronized (groups) {
128:                    return (groups.values().iterator());
129:                }
130:
131:            }
132:
133:            /**
134:             * Return the unique global identifier of this user database.
135:             */
136:            public String getId() {
137:
138:                return (this .id);
139:
140:            }
141:
142:            /**
143:             * Return the relative or absolute pathname to the persistent storage file.
144:             */
145:            public String getPathname() {
146:
147:                return (this .pathname);
148:
149:            }
150:
151:            /**
152:             * Set the relative or absolute pathname to the persistent storage file.
153:             *
154:             * @param pathname The new pathname
155:             */
156:            public void setPathname(String pathname) {
157:
158:                this .pathname = pathname;
159:                this .pathnameOld = pathname + ".old";
160:                this .pathnameNew = pathname + ".new";
161:
162:            }
163:
164:            /**
165:             * Return the set of {@link Role}s defined in this user database.
166:             */
167:            public Iterator getRoles() {
168:
169:                synchronized (roles) {
170:                    return (roles.values().iterator());
171:                }
172:
173:            }
174:
175:            /**
176:             * Return the set of {@link User}s defined in this user database.
177:             */
178:            public Iterator getUsers() {
179:
180:                synchronized (users) {
181:                    return (users.values().iterator());
182:                }
183:
184:            }
185:
186:            // --------------------------------------------------------- Public Methods
187:
188:            /**
189:             * Finalize access to this user database.
190:             *
191:             * @exception Exception if any exception is thrown during closing
192:             */
193:            public void close() throws Exception {
194:
195:                save();
196:
197:                synchronized (groups) {
198:                    synchronized (users) {
199:                        users.clear();
200:                        groups.clear();
201:                    }
202:                }
203:
204:            }
205:
206:            /**
207:             * Create and return a new {@link Group} defined in this user database.
208:             *
209:             * @param groupname The group name of the new group (must be unique)
210:             * @param description The description of this group
211:             */
212:            public Group createGroup(String groupname, String description) {
213:
214:                MemoryGroup group = new MemoryGroup(this , groupname,
215:                        description);
216:                synchronized (groups) {
217:                    groups.put(group.getGroupname(), group);
218:                }
219:                return (group);
220:
221:            }
222:
223:            /**
224:             * Create and return a new {@link Role} defined in this user database.
225:             *
226:             * @param rolename The role name of the new group (must be unique)
227:             * @param description The description of this group
228:             */
229:            public Role createRole(String rolename, String description) {
230:
231:                MemoryRole role = new MemoryRole(this , rolename, description);
232:                synchronized (roles) {
233:                    roles.put(role.getRolename(), role);
234:                }
235:                return (role);
236:
237:            }
238:
239:            /**
240:             * Create and return a new {@link User} defined in this user database.
241:             *
242:             * @param username The logon username of the new user (must be unique)
243:             * @param password The logon password of the new user
244:             * @param fullName The full name of the new user
245:             */
246:            public User createUser(String username, String password,
247:                    String fullName) {
248:
249:                MemoryUser user = new MemoryUser(this , username, password,
250:                        fullName);
251:                synchronized (users) {
252:                    users.put(user.getUsername(), user);
253:                }
254:                return (user);
255:
256:            }
257:
258:            /**
259:             * Return the {@link Group} with the specified group name, if any;
260:             * otherwise return <code>null</code>.
261:             *
262:             * @param groupname Name of the group to return
263:             */
264:            public Group findGroup(String groupname) {
265:
266:                synchronized (groups) {
267:                    return ((Group) groups.get(groupname));
268:                }
269:
270:            }
271:
272:            /**
273:             * Return the {@link Role} with the specified role name, if any;
274:             * otherwise return <code>null</code>.
275:             *
276:             * @param rolename Name of the role to return
277:             */
278:            public Role findRole(String rolename) {
279:
280:                synchronized (roles) {
281:                    return ((Role) roles.get(rolename));
282:                }
283:
284:            }
285:
286:            /**
287:             * Return the {@link User} with the specified user name, if any;
288:             * otherwise return <code>null</code>.
289:             *
290:             * @param username Name of the user to return
291:             */
292:            public User findUser(String username) {
293:
294:                synchronized (users) {
295:                    return ((User) users.get(username));
296:                }
297:
298:            }
299:
300:            /**
301:             * Initialize access to this user database.
302:             *
303:             * @exception Exception if any exception is thrown during opening
304:             */
305:            public void open() throws Exception {
306:
307:                synchronized (groups) {
308:                    synchronized (users) {
309:
310:                        // Erase any previous groups and users
311:                        users.clear();
312:                        groups.clear();
313:                        roles.clear();
314:
315:                        // Construct a reader for the XML input file (if it exists)
316:                        File file = new File(pathname);
317:                        if (!file.isAbsolute()) {
318:                            file = new File(
319:                                    System.getProperty("catalina.base"),
320:                                    pathname);
321:                        }
322:                        if (!file.exists()) {
323:                            return;
324:                        }
325:                        FileInputStream fis = new FileInputStream(file);
326:
327:                        // Construct a digester to read the XML input file
328:                        Digester digester = new Digester();
329:                        digester.addFactoryCreate("tomcat-users/group",
330:                                new MemoryGroupCreationFactory(this ));
331:                        digester.addFactoryCreate("tomcat-users/role",
332:                                new MemoryRoleCreationFactory(this ));
333:                        digester.addFactoryCreate("tomcat-users/user",
334:                                new MemoryUserCreationFactory(this ));
335:
336:                        // Parse the XML input file to load this database
337:                        try {
338:                            digester.parse(fis);
339:                            fis.close();
340:                        } catch (Exception e) {
341:                            try {
342:                                fis.close();
343:                            } catch (Throwable t) {
344:                                ;
345:                            }
346:                            throw e;
347:                        }
348:
349:                    }
350:                }
351:
352:            }
353:
354:            /**
355:             * Remove the specified {@link Group} from this user database.
356:             *
357:             * @param group The group to be removed
358:             */
359:            public void removeGroup(Group group) {
360:
361:                synchronized (groups) {
362:                    Iterator users = getUsers();
363:                    while (users.hasNext()) {
364:                        User user = (User) users.next();
365:                        user.removeGroup(group);
366:                    }
367:                    groups.remove(group.getGroupname());
368:                }
369:
370:            }
371:
372:            /**
373:             * Remove the specified {@link Role} from this user database.
374:             *
375:             * @param role The role to be removed
376:             */
377:            public void removeRole(Role role) {
378:
379:                synchronized (roles) {
380:                    Iterator groups = getGroups();
381:                    while (groups.hasNext()) {
382:                        Group group = (Group) groups.next();
383:                        group.removeRole(role);
384:                    }
385:                    Iterator users = getUsers();
386:                    while (users.hasNext()) {
387:                        User user = (User) users.next();
388:                        user.removeRole(role);
389:                    }
390:                    roles.remove(role.getRolename());
391:                }
392:
393:            }
394:
395:            /**
396:             * Remove the specified {@link User} from this user database.
397:             *
398:             * @param user The user to be removed
399:             */
400:            public void removeUser(User user) {
401:
402:                synchronized (users) {
403:                    users.remove(user.getUsername());
404:                }
405:
406:            }
407:
408:            /**
409:             * Save any updated information to the persistent storage location for
410:             * this user database.
411:             *
412:             * @exception Exception if any exception is thrown during saving
413:             */
414:            public void save() throws Exception {
415:
416:                // Write out contents to a temporary file
417:                File fileNew = new File(pathnameNew);
418:                if (!fileNew.isAbsolute()) {
419:                    fileNew = new File(System.getProperty("catalina.base"),
420:                            pathnameNew);
421:                }
422:                PrintWriter writer = null;
423:                try {
424:
425:                    // Configure our PrintWriter
426:                    FileOutputStream fos = new FileOutputStream(fileNew);
427:                    OutputStreamWriter osw = new OutputStreamWriter(fos, "UTF8");
428:                    writer = new PrintWriter(osw);
429:
430:                    // Print the file prolog
431:                    writer.println("<?xml version='1.0' encoding='utf-8'?>");
432:                    writer.println("<tomcat-users>");
433:
434:                    // Print entries for each defined role, group, and user
435:                    Iterator values = null;
436:                    values = getRoles();
437:                    while (values.hasNext()) {
438:                        writer.print("  ");
439:                        writer.println(values.next());
440:                    }
441:                    values = getGroups();
442:                    while (values.hasNext()) {
443:                        writer.print("  ");
444:                        writer.println(values.next());
445:                    }
446:                    values = getUsers();
447:                    while (values.hasNext()) {
448:                        writer.print("  ");
449:                        writer.println(values.next());
450:                    }
451:
452:                    // Print the file epilog
453:                    writer.println("</tomcat-users>");
454:
455:                    // Check for errors that occurred while printing
456:                    if (writer.checkError()) {
457:                        writer.close();
458:                        fileNew.delete();
459:                        throw new IOException(sm.getString(
460:                                "memoryUserDatabase.writeException", fileNew
461:                                        .getAbsolutePath()));
462:                    }
463:                    writer.close();
464:                } catch (IOException e) {
465:                    if (writer != null) {
466:                        writer.close();
467:                    }
468:                    fileNew.delete();
469:                    throw e;
470:                }
471:
472:                // Perform the required renames to permanently save this file
473:                File fileOld = new File(pathnameOld);
474:                if (!fileOld.isAbsolute()) {
475:                    fileOld = new File(System.getProperty("catalina.base"),
476:                            pathnameOld);
477:                }
478:                fileOld.delete();
479:                File fileOrig = new File(pathname);
480:                if (!fileOrig.isAbsolute()) {
481:                    fileOrig = new File(System.getProperty("catalina.base"),
482:                            pathname);
483:                }
484:                if (fileOrig.exists()) {
485:                    fileOld.delete();
486:                    if (!fileOrig.renameTo(fileOld)) {
487:                        throw new IOException(sm.getString(
488:                                "memoryUserDatabase.renameOld", fileOld
489:                                        .getAbsolutePath()));
490:                    }
491:                }
492:                if (!fileNew.renameTo(fileOrig)) {
493:                    if (fileOld.exists()) {
494:                        fileOld.renameTo(fileOrig);
495:                    }
496:                    throw new IOException(sm.getString(
497:                            "memoryUserDatabase.renameNew", fileOrig
498:                                    .getAbsolutePath()));
499:                }
500:                fileOld.delete();
501:
502:            }
503:
504:            /**
505:             * Return a String representation of this UserDatabase.
506:             */
507:            public String toString() {
508:
509:                StringBuffer sb = new StringBuffer("MemoryUserDatabase[id=");
510:                sb.append(this .id);
511:                sb.append(",pathname=");
512:                sb.append(pathname);
513:                sb.append(",groupCount=");
514:                sb.append(this .groups.size());
515:                sb.append(",roleCount=");
516:                sb.append(this .roles.size());
517:                sb.append(",userCount=");
518:                sb.append(this .users.size());
519:                sb.append("]");
520:                return (sb.toString());
521:
522:            }
523:
524:            // -------------------------------------------------------- Package Methods
525:
526:            /**
527:             * Return the <code>StringManager</code> for use in looking up messages.
528:             */
529:            StringManager getStringManager() {
530:
531:                return (sm);
532:
533:            }
534:
535:        }
536:
537:        /**
538:         * Digester object creation factory for group instances.
539:         */
540:        class MemoryGroupCreationFactory implements  ObjectCreationFactory {
541:
542:            public MemoryGroupCreationFactory(MemoryUserDatabase database) {
543:                this .database = database;
544:            }
545:
546:            public Object createObject(Attributes attributes) {
547:                String groupname = attributes.getValue("groupname");
548:                if (groupname == null) {
549:                    groupname = attributes.getValue("name");
550:                }
551:                String description = attributes.getValue("description");
552:                String roles = attributes.getValue("roles");
553:                Group group = database.createGroup(groupname, description);
554:                if (roles != null) {
555:                    while (roles.length() > 0) {
556:                        String rolename = null;
557:                        int comma = roles.indexOf(',');
558:                        if (comma >= 0) {
559:                            rolename = roles.substring(0, comma).trim();
560:                            roles = roles.substring(comma + 1);
561:                        } else {
562:                            rolename = roles.trim();
563:                            roles = "";
564:                        }
565:                        if (rolename.length() > 0) {
566:                            Role role = database.findRole(rolename);
567:                            if (role == null) {
568:                                role = database.createRole(rolename, null);
569:                            }
570:                            group.addRole(role);
571:                        }
572:                    }
573:                }
574:                return (group);
575:            }
576:
577:            private MemoryUserDatabase database = null;
578:
579:            private Digester digester = null;
580:
581:            public Digester getDigester() {
582:                return (this .digester);
583:            }
584:
585:            public void setDigester(Digester digester) {
586:                this .digester = digester;
587:            }
588:
589:        }
590:
591:        /**
592:         * Digester object creation factory for role instances.
593:         */
594:        class MemoryRoleCreationFactory implements  ObjectCreationFactory {
595:
596:            public MemoryRoleCreationFactory(MemoryUserDatabase database) {
597:                this .database = database;
598:            }
599:
600:            public Object createObject(Attributes attributes) {
601:                String rolename = attributes.getValue("rolename");
602:                if (rolename == null) {
603:                    rolename = attributes.getValue("name");
604:                }
605:                String description = attributes.getValue("description");
606:                Role role = database.createRole(rolename, description);
607:                return (role);
608:            }
609:
610:            private MemoryUserDatabase database = null;
611:
612:            private Digester digester = null;
613:
614:            public Digester getDigester() {
615:                return (this .digester);
616:            }
617:
618:            public void setDigester(Digester digester) {
619:                this .digester = digester;
620:            }
621:
622:        }
623:
624:        /**
625:         * Digester object creation factory for user instances.
626:         */
627:        class MemoryUserCreationFactory implements  ObjectCreationFactory {
628:
629:            public MemoryUserCreationFactory(MemoryUserDatabase database) {
630:                this .database = database;
631:            }
632:
633:            public Object createObject(Attributes attributes) {
634:                String username = attributes.getValue("username");
635:                if (username == null) {
636:                    username = attributes.getValue("name");
637:                }
638:                String password = attributes.getValue("password");
639:                String fullName = attributes.getValue("fullName");
640:                if (fullName == null) {
641:                    fullName = attributes.getValue("fullname");
642:                }
643:                String groups = attributes.getValue("groups");
644:                String roles = attributes.getValue("roles");
645:                User user = database.createUser(username, password, fullName);
646:                if (groups != null) {
647:                    while (groups.length() > 0) {
648:                        String groupname = null;
649:                        int comma = groups.indexOf(',');
650:                        if (comma >= 0) {
651:                            groupname = groups.substring(0, comma).trim();
652:                            groups = groups.substring(comma + 1);
653:                        } else {
654:                            groupname = groups.trim();
655:                            groups = "";
656:                        }
657:                        if (groupname.length() > 0) {
658:                            Group group = database.findGroup(groupname);
659:                            if (group == null) {
660:                                group = database.createGroup(groupname, null);
661:                            }
662:                            user.addGroup(group);
663:                        }
664:                    }
665:                }
666:                if (roles != null) {
667:                    while (roles.length() > 0) {
668:                        String rolename = null;
669:                        int comma = roles.indexOf(',');
670:                        if (comma >= 0) {
671:                            rolename = roles.substring(0, comma).trim();
672:                            roles = roles.substring(comma + 1);
673:                        } else {
674:                            rolename = roles.trim();
675:                            roles = "";
676:                        }
677:                        if (rolename.length() > 0) {
678:                            Role role = database.findRole(rolename);
679:                            if (role == null) {
680:                                role = database.createRole(rolename, null);
681:                            }
682:                            user.addRole(role);
683:                        }
684:                    }
685:                }
686:                return (user);
687:            }
688:
689:            private MemoryUserDatabase database = null;
690:
691:            private Digester digester = null;
692:
693:            public Digester getDigester() {
694:                return (this .digester);
695:            }
696:
697:            public void setDigester(Digester digester) {
698:                this.digester = digester;
699:            }
700:
701:        }
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