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.sql.DatabaseConnection;\r
  33 import cx.fbn.nevernote.utilities.ApplicationLogger;\r
  34 import cx.fbn.nevernote.utilities.Pair;\r
  35 \r
  36 public class SaveRunner extends QObject implements Runnable {\r
  37          \r
  38         private final ApplicationLogger         logger;\r
  39         private volatile boolean                        keepRunning;\r
  40         public QMutex                                           threadLock;\r
  41         private final DatabaseConnection        conn;\r
  42         private boolean                                         idle;\r
  43         private final int                                       threadID;\r
  44 \r
  45         private volatile LinkedBlockingQueue<Pair<String, String>> workQueue = new LinkedBlockingQueue<Pair<String, String>>();\r
  46         \r
  47         \r
  48         //*********************************************\r
  49         //* Constructor                               *\r
  50         //*********************************************\r
  51         public SaveRunner(String logname) {\r
  52                 logger = new ApplicationLogger(logname);\r
  53                 threadID = Global.saveThreadId;\r
  54                 conn = new DatabaseConnection(logger, threadID);\r
  55                 threadLock = new QMutex();\r
  56                 keepRunning = true;\r
  57         }\r
  58         \r
  59         \r
  60         \r
  61         //*********************************************\r
  62         //* Run unit                                  *\r
  63         //*********************************************\r
  64         @Override\r
  65         public void run() {\r
  66                 thread().setPriority(Thread.MIN_PRIORITY);\r
  67                 boolean keepRunning = true;\r
  68                 \r
  69                 while(keepRunning) {\r
  70                         try {\r
  71                                 Pair<String, String> content;\r
  72                                 idle = true;\r
  73                                 content = workQueue.take();\r
  74                                 if (!content.getFirst().equalsIgnoreCase("stop")) {                                             \r
  75                                         idle = false;\r
  76                                         \r
  77                                         // This is a bit of a hack.  It causes this thread to pause for 0.2 seconds.\r
  78                                         // This helps make sure that the main thread gets to the\r
  79                                         // database first when switching notes, othrewise it really \r
  80                                         // slows things down when fetching new notes.\r
  81                                         GregorianCalendar now = new GregorianCalendar();\r
  82                                         long prev = now.getTimeInMillis();\r
  83                                         prev = prev+200;\r
  84                                         while (prev>now.getTimeInMillis()) {\r
  85                                                 now = new GregorianCalendar();                                          \r
  86                                         }\r
  87                                         \r
  88                                         updateNoteContent(content.getFirst(), content.getSecond());\r
  89                                 } else {\r
  90                                         return;\r
  91                                 }\r
  92                                 threadLock.unlock();\r
  93                         } catch (InterruptedException e) { }\r
  94                 }\r
  95         }\r
  96         \r
  97         \r
  98         public synchronized void addWork(String guid, String content) {\r
  99                 while(workQueue.size() > 0) {}\r
 100                 Pair<String, String> pair = new Pair<String, String>(guid, content);\r
 101                 workQueue.offer(pair);\r
 102         }\r
 103         \r
 104         public synchronized void release(String guid, String content) {\r
 105                 Pair<String, String> pair = new Pair<String, String>(guid, content);\r
 106                 workQueue.add(pair);\r
 107         }\r
 108         \r
 109         public synchronized int getWorkQueueSize() {\r
 110                 return workQueue.size();\r
 111         }\r
 112 \r
 113         \r
 114         //*********************************************\r
 115         //* Getter & Setter method to tell the thread *\r
 116         //* to keep running.                          *\r
 117         //*********************************************\r
 118         public void setKeepRunning(boolean b) {\r
 119                 keepRunning = b;\r
 120         }\r
 121         public boolean keepRunning() {\r
 122                 return keepRunning;\r
 123         }\r
 124         \r
 125         public boolean isIdle() {\r
 126                 return idle;\r
 127         }\r
 128         \r
 129         \r
 130         //*********************************************\r
 131         //* Do the actual work                                *\r
 132         //*********************************************\r
 133         public void updateNoteContent(String guid, String content) {\r
 134                 logger.log(logger.HIGH, "Entering ListManager.updateNoteContent");\r
 135                 \r
 136                 // Actually save the content\r
 137                 EnmlConverter enml = new EnmlConverter(logger);\r
 138                 String newContent = enml.convert(guid, content);\r
 139                 String fixedContent = enml.fixEnXMLCrap(newContent);\r
 140                 conn.getNoteTable().updateNoteContent(guid, fixedContent);\r
 141 \r
 142 \r
 143                 logger.log(logger.EXTREME, "Saving new note resources");\r
 144                 List<Resource> oldResources = conn.getNoteTable().noteResourceTable.getNoteResources(guid, false);\r
 145                 List<String> newResources = enml.getResources();\r
 146                 removeObsoleteResources(oldResources, newResources);\r
 147                 \r
 148                 logger.log(logger.HIGH, "Leaving ListManager.updateNoteContent");\r
 149         }\r
 150         \r
 151         // Remove resources that are no longer needed\r
 152         private void removeObsoleteResources(List<Resource> oldResources, List<String> newResources) {\r
 153                 if (oldResources == null || oldResources.size() == 0)\r
 154                         return;\r
 155                 if (newResources == null || newResources.size() == 0) {\r
 156                         for (int i=0; i<oldResources.size(); i++) {\r
 157                                 conn.getNoteTable().noteResourceTable.expungeNoteResource(oldResources.get(i).getGuid());\r
 158                         }\r
 159                 }\r
 160                 for (int i=0; i<oldResources.size(); i++) {\r
 161                         boolean matchFound = false;\r
 162                         for (int j=0; j<newResources.size(); j++) {\r
 163                                 if (newResources.get(j).equalsIgnoreCase(oldResources.get(i).getGuid())) \r
 164                                         matchFound = true;\r
 165                                 if (Global.resourceMap.get(newResources.get(j))!= null) {\r
 166                                         if (Global.resourceMap.get(newResources.get(j)).equalsIgnoreCase(oldResources.get(i).getGuid())) \r
 167                                                 matchFound = true;\r
 168                                 }\r
 169                                 if (matchFound)\r
 170                                         j = newResources.size();\r
 171                         }\r
 172                         if (!matchFound)\r
 173                                 conn.getNoteTable().noteResourceTable.expungeNoteResource(oldResources.get(i).getGuid());\r
 174                 }\r
 175         }\r
 176 }\r