Source Code Cross Referenced for DbChatService.java in  » ERP-CRM-Financial » sakai » org » sakaiproject » chat » impl » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » ERP CRM Financial » sakai » org.sakaiproject.chat.impl 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /**********************************************************************************
002:         * $URL: https://source.sakaiproject.org/svn/chat/tags/sakai_2-4-1/chat-impl/impl/src/java/org/sakaiproject/chat/impl/DbChatService.java $
003:         * $Id: DbChatService.java 8206 2006-04-24 19:40:15Z ggolden@umich.edu $
004:         ***********************************************************************************
005:         *
006:         * Copyright (c) 2003, 2004, 2005, 2006 The Sakai Foundation.
007:         * 
008:         * Licensed under the Educational Community License, Version 1.0 (the "License"); 
009:         * you may not use this file except in compliance with the License. 
010:         * You may obtain a copy of the License at
011:         * 
012:         *      http://www.opensource.org/licenses/ecl1.php
013:         * 
014:         * Unless required by applicable law or agreed to in writing, software 
015:         * distributed under the License is distributed on an "AS IS" BASIS, 
016:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
017:         * See the License for the specific language governing permissions and 
018:         * limitations under the License.
019:         *
020:         **********************************************************************************/package org.sakaiproject.chat.impl;
021:
022:        import java.sql.Connection;
023:        import java.sql.ResultSet;
024:        import java.util.List;
025:
026:        import org.apache.commons.logging.Log;
027:        import org.apache.commons.logging.LogFactory;
028:        import org.sakaiproject.db.api.SqlReader;
029:        import org.sakaiproject.db.api.SqlService;
030:        import org.sakaiproject.message.api.Message;
031:        import org.sakaiproject.message.api.MessageChannel;
032:        import org.sakaiproject.message.api.MessageChannelEdit;
033:        import org.sakaiproject.message.api.MessageEdit;
034:        import org.sakaiproject.time.api.Time;
035:        import org.sakaiproject.util.BaseDbDoubleStorage;
036:        import org.sakaiproject.util.StorageUser;
037:        import org.sakaiproject.util.Xml;
038:        import org.w3c.dom.Document;
039:        import org.w3c.dom.Element;
040:
041:        /**
042:         * <p>
043:         * DbChatService fills out the BaseChatService with a database implementation.
044:         * </p>
045:         */
046:        public class DbChatService extends BaseChatService {
047:            /** Our logger. */
048:            private static Log M_log = LogFactory.getLog(DbChatService.class);
049:
050:            /** The name of the db table holding chat channels. */
051:            protected String m_cTableName = "CHAT_CHANNEL";
052:
053:            /** The name of the db table holding chat messages. */
054:            protected String m_rTableName = "CHAT_MESSAGE";
055:
056:            /** If true, we do our locks in the remote database, otherwise we do them here. */
057:            protected boolean m_locksInDb = true;
058:
059:            protected static final String[] FIELDS = { "MESSAGE_DATE", "OWNER",
060:                    "DRAFT", "PUBVIEW" };
061:
062:            /**********************************************************************************************************************************************************************************************************************************************************
063:             * Constructors, Dependencies and their setter methods
064:             *********************************************************************************************************************************************************************************************************************************************************/
065:
066:            /** Dependency: SqlService */
067:            protected SqlService m_sqlService = null;
068:
069:            /**
070:             * Dependency: SqlService.
071:             * 
072:             * @param service
073:             *        The SqlService.
074:             */
075:            public void setSqlService(SqlService service) {
076:                m_sqlService = service;
077:            }
078:
079:            /**
080:             * Configuration: set the table name for the container.
081:             * 
082:             * @param path
083:             *        The table name for the container.
084:             */
085:            public void setContainerTableName(String name) {
086:                m_cTableName = name;
087:            }
088:
089:            /**
090:             * Configuration: set the table name for the resource.
091:             * 
092:             * @param path
093:             *        The table name for the resource.
094:             */
095:            public void setResourceTableName(String name) {
096:                m_rTableName = name;
097:            }
098:
099:            /**
100:             * Configuration: set the locks-in-db
101:             * 
102:             * @param path
103:             *        The storage path.
104:             */
105:            public void setLocksInDb(String value) {
106:                m_locksInDb = new Boolean(value).booleanValue();
107:            }
108:
109:            /** Set if we are to run the to-draft/owner conversion. */
110:            protected boolean m_convertToDraft = false;
111:
112:            /**
113:             * Configuration: run the to-draft/owner conversion
114:             * 
115:             * @param value
116:             *        The conversion desired value.
117:             */
118:            public void setConvertDraft(String value) {
119:                m_convertToDraft = new Boolean(value).booleanValue();
120:            }
121:
122:            /** Configuration: to run the ddl on init or not. */
123:            protected boolean m_autoDdl = false;
124:
125:            /**
126:             * Configuration: to run the ddl on init or not.
127:             * 
128:             * @param value
129:             *        the auto ddl value.
130:             */
131:            public void setAutoDdl(String value) {
132:                m_autoDdl = new Boolean(value).booleanValue();
133:            }
134:
135:            /**********************************************************************************************************************************************************************************************************************************************************
136:             * Init and Destroy
137:             *********************************************************************************************************************************************************************************************************************************************************/
138:
139:            /**
140:             * Final initialization, once all dependencies are set.
141:             */
142:            public void init() {
143:                try {
144:                    // if we are auto-creating our schema, check and create
145:                    if (m_autoDdl) {
146:                        m_sqlService.ddl(this .getClass().getClassLoader(),
147:                                "sakai_chat");
148:                    }
149:
150:                    super .init();
151:
152:                    M_log.info("init(): tables: " + m_cTableName + " "
153:                            + m_rTableName + " locks-in-db: " + m_locksInDb);
154:
155:                    // convert?
156:                    if (m_convertToDraft) {
157:                        m_convertToDraft = false;
158:                        convertToDraft();
159:                    }
160:
161:                } catch (Throwable t) {
162:                    M_log.warn("init(): ", t);
163:                }
164:            }
165:
166:            /**********************************************************************************************************************************************************************************************************************************************************
167:             * BaseMessageService extensions
168:             *********************************************************************************************************************************************************************************************************************************************************/
169:
170:            /**
171:             * Construct a Storage object.
172:             * 
173:             * @return The new storage object.
174:             */
175:            protected Storage newStorage() {
176:                return new DbStorage(this );
177:
178:            } // newStorage
179:
180:            /**********************************************************************************************************************************************************************************************************************************************************
181:             * Storage implementation
182:             *********************************************************************************************************************************************************************************************************************************************************/
183:
184:            protected class DbStorage extends BaseDbDoubleStorage implements 
185:                    Storage {
186:                /**
187:                 * Construct.
188:                 * 
189:                 * @param user
190:                 *        The StorageUser class to call back for creation of Resource and Edit objects.
191:                 */
192:                public DbStorage(StorageUser user) {
193:                    super (m_cTableName, "CHANNEL_ID", m_rTableName,
194:                            "MESSAGE_ID", "CHANNEL_ID", "MESSAGE_DATE",
195:                            "OWNER", "DRAFT", "PUBVIEW", FIELDS, m_locksInDb,
196:                            "channel", "message", user, m_sqlService);
197:
198:                } // DbStorage
199:
200:                /** Channels * */
201:
202:                public boolean checkChannel(String ref) {
203:                    return super .getContainer(ref) != null;
204:                }
205:
206:                public MessageChannel getChannel(String ref) {
207:                    return (MessageChannel) super .getContainer(ref);
208:                }
209:
210:                public List getChannels() {
211:                    return super .getAllContainers();
212:                }
213:
214:                public MessageChannelEdit putChannel(String ref) {
215:                    return (MessageChannelEdit) super .putContainer(ref);
216:                }
217:
218:                public MessageChannelEdit editChannel(String ref) {
219:                    return (MessageChannelEdit) super .editContainer(ref);
220:                }
221:
222:                public void commitChannel(MessageChannelEdit edit) {
223:                    super .commitContainer(edit);
224:                }
225:
226:                public void cancelChannel(MessageChannelEdit edit) {
227:                    super .cancelContainer(edit);
228:                }
229:
230:                public void removeChannel(MessageChannelEdit edit) {
231:                    super .removeContainer(edit);
232:                }
233:
234:                public List getChannelIdsMatching(String root) {
235:                    return super .getContainerIdsMatching(root);
236:                }
237:
238:                /** messages * */
239:
240:                public boolean checkMessage(MessageChannel channel, String id) {
241:                    return super .checkResource(channel, id);
242:                }
243:
244:                public Message getMessage(MessageChannel channel, String id) {
245:                    return (Message) super .getResource(channel, id);
246:                }
247:
248:                public List getMessages(MessageChannel channel) {
249:                    return super .getAllResources(channel);
250:                }
251:
252:                public MessageEdit putMessage(MessageChannel channel, String id) {
253:                    return (MessageEdit) super .putResource(channel, id, null);
254:                }
255:
256:                public MessageEdit editMessage(MessageChannel channel, String id) {
257:                    return (MessageEdit) super .editResource(channel, id);
258:                }
259:
260:                public void commitMessage(MessageChannel channel,
261:                        MessageEdit edit) {
262:                    super .commitResource(channel, edit);
263:                }
264:
265:                public void cancelMessage(MessageChannel channel,
266:                        MessageEdit edit) {
267:                    super .cancelResource(channel, edit);
268:                }
269:
270:                public void removeMessage(MessageChannel channel,
271:                        MessageEdit edit) {
272:                    super .removeResource(channel, edit);
273:                }
274:
275:                public List getMessages(MessageChannel channel, Time afterDate,
276:                        int limitedToLatest, String draftsForId,
277:                        boolean pubViewOnly) {
278:                    return super .getResources(channel, afterDate,
279:                            limitedToLatest, draftsForId, pubViewOnly);
280:                }
281:
282:            } // DbStorage
283:
284:            /**
285:             * fill in the draft and owner db fields
286:             */
287:            protected void convertToDraft() {
288:                M_log.info("convertToDraft");
289:
290:                try {
291:                    // get a connection
292:                    final Connection connection = m_sqlService
293:                            .borrowConnection();
294:                    boolean wasCommit = connection.getAutoCommit();
295:                    connection.setAutoCommit(false);
296:
297:                    // read all message records that need conversion
298:                    String sql = "select CHANNEL_ID, MESSAGE_ID, XML from "
299:                            + m_rTableName /* + " where OWNER is null" */;
300:                    m_sqlService.dbRead(connection, sql, null, new SqlReader() {
301:                        private int count = 0;
302:
303:                        public Object readSqlResultRecord(ResultSet result) {
304:                            try {
305:                                // create the Resource from the db xml
306:                                String channelId = result.getString(1);
307:                                String messageId = result.getString(2);
308:                                String xml = result.getString(3);
309:
310:                                // read the xml
311:                                Document doc = Xml.readDocumentFromString(xml);
312:
313:                                // verify the root element
314:                                Element root = doc.getDocumentElement();
315:                                if (!root.getTagName().equals("message")) {
316:                                    M_log
317:                                            .warn("convertToDraft(): XML root element not message: "
318:                                                    + root.getTagName());
319:                                    return null;
320:                                }
321:                                Message m = new BaseMessageEdit(null, root);
322:
323:                                // pick up the fields
324:                                String owner = m.getHeader().getFrom().getId();
325:                                boolean draft = m.getHeader().getDraft();
326:
327:                                // update
328:                                String update = "update "
329:                                        + m_rTableName
330:                                        + " set OWNER = ?, DRAFT = ? where CHANNEL_ID = ? and MESSAGE_ID = ?";
331:                                Object fields[] = new Object[4];
332:                                fields[0] = owner;
333:                                fields[1] = (draft ? "1" : "0");
334:                                fields[2] = channelId;
335:                                fields[3] = messageId;
336:                                boolean ok = m_sqlService.dbWrite(connection,
337:                                        update, fields);
338:
339:                                if (!ok)
340:                                    M_log
341:                                            .info("convertToDraft: channel: "
342:                                                    + channelId + " message: "
343:                                                    + messageId + " owner: "
344:                                                    + owner + " draft: "
345:                                                    + draft + " ok: " + ok);
346:
347:                                count++;
348:                                if (count % 100 == 0) {
349:                                    M_log.info("convertToDraft: " + count);
350:                                }
351:                                return null;
352:                            } catch (Throwable ignore) {
353:                                return null;
354:                            }
355:                        }
356:                    });
357:
358:                    connection.commit();
359:                    connection.setAutoCommit(wasCommit);
360:                    m_sqlService.returnConnection(connection);
361:                } catch (Throwable t) {
362:                    M_log.warn("convertToDraft: failed: " + t);
363:                }
364:
365:                M_log.info("convertToDraft: done");
366:            }
367:        }
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