src/cx/fbn/nevernote/threads/SaveRunner.java

   1 /*\r
   2  * This file is part of NeverNote \r
   3  * Copyright 2009 Randy Baumgarte\r
   4  * \r
   5  * This file may be licensed under the terms of of the\r
   6  * GNU General Public License Version 2 (the ``GPL'').\r
   7  *\r
   8  * Software distributed under the License is distributed\r
   9  * on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either\r
  10  * express or implied. See the GPL for the specific language\r
  11  * governing rights and limitations.\r
  12  *\r
  13  * You should have received a copy of the GPL along with this\r
  14  * program. If not, go to http://www.gnu.org/licenses/gpl.html\r
  15  * or write to the Free Software Foundation, Inc.,\r
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.\r
  17  *\r
  18 */\r
  19 \r
  20 package cx.fbn.nevernote.threads;\r
  21 \r
  22 import java.util.GregorianCalendar;\r
  23 import java.util.List;\r
  24 import java.util.concurrent.LinkedBlockingQueue;\r
  25 \r
  26 import com.evernote.edam.type.Resource;\r
  27 import com.trolltech.qt.core.QMutex;\r
  28 import com.trolltech.qt.core.QObject;\r
  29 \r
  30 import cx.fbn.nevernote.Global;\r
  31 import cx.fbn.nevernote.evernote.EnmlConverter;\r
  32 import cx.fbn.nevernote.signals.NoteSignal;\r
  33 import cx.fbn.nevernote.sql.DatabaseConnection;\r
  34 import cx.fbn.nevernote.utilities.ApplicationLogger;\r
  35 import cx.fbn.nevernote.utilities.Pair;\r
  36 \r
  37 public class SaveRunner extends QObject implements Runnable {\r
  38          \r
  39         private final ApplicationLogger         logger;\r
  40         public volatile boolean                         keepRunning;\r
  41         public QMutex                                           threadLock;\r
  42         private final DatabaseConnection        conn;\r
  43         private boolean                                         idle;\r
  44         public NoteSignal                                       noteSignals;\r
  45 \r
  46         private volatile LinkedBlockingQueue<Pair<String, String>> workQueue = new LinkedBlockingQueue<Pair<String, String>>();\r
  47         \r
  48         \r
  49         //*********************************************\r
  50         //* Constructor                               *\r
  51         //*********************************************\r
  52         public SaveRunner(String logname, String u, String uid, String pswd, String cpswd) {\r
  53                 logger = new ApplicationLogger(logname);\r
  54                 conn = new DatabaseConnection(logger, u, uid, pswd, cpswd, 0);\r
  55                 threadLock = new QMutex();\r
  56                 keepRunning = true;\r
  57                 noteSignals = new NoteSignal();\r
  58         }\r
  59         \r
  60         \r
  61         \r
  62         //*********************************************\r
  63         //* Run unit                                  *\r
  64         //*********************************************\r
  65         @Override\r
  66         public void run() {\r
  67                 thread().setPriority(Thread.MIN_PRIORITY);\r
  68                 boolean keepRunning = true;\r
  69                 \r
  70                 while(keepRunning) {\r
  71                         try {\r
  72                                 Pair<String, String> content;\r
  73                                 idle = true;\r
  74                                 content = workQueue.take();\r
  75                                 if (!content.getFirst().equalsIgnoreCase("stop")) {                                             \r
  76                                         idle = false;\r
  77                                         \r
  78                                         // This is a bit of a hack.  It causes this thread to pause for 0.2 seconds.\r
  79                                         // This helps make sure that the main thread gets to the\r
  80                                         // database first when switching notes, othrewise it really \r
  81                                         // slows things down when fetching new notes.\r
  82                                         GregorianCalendar now = new GregorianCalendar();\r
  83                                         long prev = now.getTimeInMillis();\r
  84                                         prev = prev+200;\r
  85                                         while (prev>now.getTimeInMillis()) {\r
  86                                                 now = new GregorianCalendar();                                          \r
  87                                         }\r
  88                                         \r
  89                                         updateNoteContent(content.getFirst(), content.getSecond());\r
  90                                 } else {\r
  91                                         return;\r
  92                                 }\r
  93                                 threadLock.unlock();\r
  94                         } catch (InterruptedException e) { }\r
  95                 }\r
  96                 conn.dbShutdown();\r
  97         }\r
  98         \r
  99         \r
 100         public synchronized void addWork(String guid, String content) {\r
 101                 while(workQueue.size() > 0) {}\r
 102                 Pair<String, String> pair = new Pair<String, String>(guid, content);\r
 103                 workQueue.offer(pair);\r
 104         }\r
 105         \r
 106         public synchronized void release(String guid, String content) {\r
 107                 Pair<String, String> pair = new Pair<String, String>(guid, content);\r
 108                 workQueue.add(pair);\r
 109         }\r
 110         \r
 111         public synchronized int getWorkQueueSize() {\r
 112                 return workQueue.size();\r
 113         }\r
 114 \r
 115         \r
 116         //*********************************************\r
 117         //* Getter & Setter method to tell the thread *\r
 118         //* to keep running.                          *\r
 119         //*********************************************\r
 120         public void setKeepRunning(boolean b) {\r
 121                 keepRunning = b;\r
 122         }\r
 123         public boolean keepRunning() {\r
 124                 return keepRunning;\r
 125         }\r
 126         \r
 127         public boolean isIdle() {\r
 128                 return idle;\r
 129         }\r
 130         \r
 131         \r
 132         //*********************************************\r
 133         //* Do the actual work                                *\r
 134         //*********************************************\r
 135         public void updateNoteContent(String guid, String content) {\r
 136                 logger.log(logger.HIGH, "Entering ListManager.updateNoteContent");\r
 137                 \r
 138                 // Actually save the content\r
 139                 EnmlConverter enml = new EnmlConverter(logger);\r
 140                 String newContent = enml.convert(guid, content);\r
 141                 String fixedContent = enml.fixEnXMLCrap(newContent);\r
 142                 if (fixedContent != null) {\r
 143                         conn.getNoteTable().updateNoteContent(guid, fixedContent);\r
 144                         logger.log(logger.EXTREME, "Saving new note resources");\r
 145                         List<Resource> oldResources = conn.getNoteTable().noteResourceTable.getNoteResources(guid, false);\r
 146                         List<String> newResources = enml.getResources();\r
 147                         removeObsoleteResources(oldResources, newResources);\r
 148                 } else {\r
 149                         noteSignals.noteSaveRunnerError.emit(guid, null);\r
 150                 }\r
 151                 logger.log(logger.HIGH, "Leaving ListManager.updateNoteContent");\r
 152         }\r
 153         \r
 154         // Remove resources that are no longer needed\r
 155         private void removeObsoleteResources(List<Resource> oldResources, List<String> newResources) {\r
 156                 if (oldResources == null || oldResources.size() == 0)\r
 157                         return;\r
 158                 if (newResources == null || newResources.size() == 0) {\r
 159                         for (int i=0; i<oldResources.size(); i++) {\r
 160                                 conn.getNoteTable().noteResourceTable.expungeNoteResource(oldResources.get(i).getGuid());\r
 161                         }\r
 162                 }\r
 163                 for (int i=0; i<oldResources.size(); i++) {\r
 164                         boolean matchFound = false;\r
 165                         for (int j=0; j<newResources.size(); j++) {\r
 166                                 if (newResources.get(j).equalsIgnoreCase(oldResources.get(i).getGuid())) \r
 167                                         matchFound = true;\r
 168                                 if (Global.resourceMap.get(newResources.get(j))!= null) {\r
 169                                         if (Global.resourceMap.get(newResources.get(j)).equalsIgnoreCase(oldResources.get(i).getGuid())) \r
 170                                                 matchFound = true;\r
 171                                 }\r
 172                                 if (matchFound)\r
 173                                         j = newResources.size();\r
 174                         }\r
 175                         if (!matchFound)\r
 176                                 conn.getNoteTable().noteResourceTable.expungeNoteResource(oldResources.get(i).getGuid());\r
 177                 }\r
 178         }\r
 179 }\r