bundles/org.simantics.db.services/src/org/simantics/db/services/activation/ActivationManager.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
   3  * in Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.db.services.activation;\r
  13 \r
  14 import org.simantics.db.Disposable;\r
  15 import org.simantics.db.ReadGraph;\r
  16 import org.simantics.db.Resource;\r
  17 import org.simantics.db.Session;\r
  18 import org.simantics.db.WriteGraph;\r
  19 import org.simantics.db.common.CommentMetadata;\r
  20 import org.simantics.db.common.request.WriteRequest;\r
  21 import org.simantics.db.common.utils.CommonDBUtils;\r
  22 import org.simantics.db.common.utils.Logger;\r
  23 import org.simantics.db.common.utils.NameUtils;\r
  24 import org.simantics.db.exception.DatabaseException;\r
  25 import org.simantics.layer0.utils.queries.QueryExecutor2;\r
  26 import org.simantics.layer0.utils.triggers.IActivation;\r
  27 import org.simantics.layer0.utils.triggers.IActivationManager;\r
  28 import org.simantics.layer0.utils.triggers.IModification;\r
  29 import org.simantics.layer0.utils.triggers.ITrigger;\r
  30 import org.simantics.operation.Layer0X;\r
  31 import org.simantics.utils.logging.TimeLogger;\r
  32 import org.simantics.utils.threads.logger.IThreadLogger;\r
  33 import org.simantics.utils.threads.logger.ThreadLogger;\r
  34 \r
  35 @SuppressWarnings("deprecation") // No replacement given so now way to fix this error.\r
  36 public class ActivationManager implements IActivationManager, Disposable {\r
  37 \r
  38         Session session;\r
  39         static IThreadLogger threadLogger = ThreadLogger.getInstance();\r
  40 \r
  41         class Activation extends QueryExecutor2 implements IActivation {\r
  42                 final boolean DEBUG = false;\r
  43                 final boolean BREAK_INFINITE_ACTIVATION_LOOPS = true;\r
  44 \r
  45                 /**\r
  46                  * After {@value InfiniteLoop} the activation will be forcibly\r
  47                  * deactivated if {@link #BREAK_INFINITE_ACTIVATION_LOOPS} is\r
  48                  * <code>true</code>.\r
  49                  */\r
  50                 final int INFINITE_LOOP_COUNT = 100;\r
  51 \r
  52                 Resource resource;\r
  53                 int transactionCount = 0;\r
  54                 boolean disposed = false;\r
  55                 boolean runOnce = false;\r
  56 \r
  57                 public Activation(Resource resource) {\r
  58                         this.resource = resource;\r
  59                 }\r
  60 \r
  61                 public void runOnceAndDeactivate() {\r
  62                         runOnce = true;\r
  63                 }\r
  64 \r
  65                 @Override\r
  66                 public void run(ReadGraph g) throws DatabaseException {\r
  67 //                      ITask task = threadLogger.begin("Activation.perform");\r
  68                         Layer0X L0X = Layer0X.getInstance(g);\r
  69                         for(Resource r : g.getObjects(resource, L0X.HasTrigger))\r
  70                                 if(calcModification(g, r) != null)\r
  71                                         execute(g, r);\r
  72 //                      task.finish();\r
  73                 }\r
  74 \r
  75                 private IModification calcModification(ReadGraph g, Resource trigger) throws DatabaseException {\r
  76 //                      new Exception().printStackTrace();\r
  77                         //ITask task = ThreadLogger.getInstance().begin("Activation.calcModification");\r
  78                         IModification modi = g.syncRequest(g.adapt(trigger, ITrigger.class));\r
  79                         //task.finish();\r
  80                         return modi;\r
  81                 }\r
  82 \r
  83                 private WriteRequest getRequest(final Resource trigger) {\r
  84                         return new WriteRequest() {\r
  85                 @Override\r
  86                 public void perform(WriteGraph g) throws DatabaseException {\r
  87                     int count = 0;\r
  88                     while (true) {\r
  89                         \r
  90                         CommonDBUtils.selectClusterSet(g, trigger);\r
  91                         \r
  92                         TimeLogger.log("ActivationManager: start calculating modification");\r
  93                         IModification modification = calcModification(g, trigger);\r
  94                         TimeLogger.log("ActivationManager: finished calculating modification");\r
  95                         if (modification != null)\r
  96                             ++count;\r
  97                         else {\r
  98                             if (count > 0) {\r
  99                                 CommentMetadata cm = g.getMetadata(CommentMetadata.class);\r
 100                                 String msg = "ActivationManager modification count=" + count;\r
 101                                 g.addMetadata(cm.add(msg));\r
 102                                 if (DEBUG)\r
 103                                     System.out.println("DEBUG: " + msg);\r
 104                             }\r
 105                             if(runOnce)\r
 106                                 deactivate();\r
 107                             return;    \r
 108                         }\r
 109                         if (BREAK_INFINITE_ACTIVATION_LOOPS) {\r
 110                             if (count > INFINITE_LOOP_COUNT) {\r
 111                                 deactivate();\r
 112                                 String msg = "Possible dynamic activation loop. Forcing break."\r
 113                                         + "Loop count was " + count\r
 114                                         + ". Activated resource was "\r
 115                                         + NameUtils.getURIOrSafeNameInternal(g, resource) + ".";\r
 116                                 System.out.println("WARNING: " + msg);\r
 117                                 throw new DatabaseException(msg);\r
 118                             }\r
 119                         }\r
 120                         try {\r
 121                             modification.perform(g);\r
 122                             TimeLogger.log("ActivationManager: performed modification");\r
 123                         } catch (DatabaseException e) {\r
 124                             deactivate();\r
 125                             throw e;\r
 126                         }\r
 127                     }\r
 128                 }\r
 129             };\r
 130                 }\r
 131                 \r
 132         private void executeOnce(WriteGraph graph, final Resource trigger) throws DatabaseException {\r
 133             getRequest(trigger).perform(graph);\r
 134 //              graph.syncRequest(getRequest(trigger));\r
 135         }\r
 136 \r
 137                 private void execute(final ReadGraph graph, final Resource trigger) {\r
 138             graph.asyncRequest(getRequest(trigger)); \r
 139         }\r
 140 \r
 141                 @Override\r
 142                 public void deactivate() {\r
 143                         disposed = true;                        \r
 144                 }\r
 145 \r
 146                 @Override\r
 147                 public boolean isDisposed() {\r
 148                         return disposed || session == null;\r
 149                 }\r
 150                 \r
 151         }\r
 152         \r
 153         public ActivationManager(Session session) {\r
 154                 this.session = session;\r
 155         }\r
 156 \r
 157         @Override\r
 158         public IActivation activate(Resource r) {\r
 159             Session s = session;\r
 160             if (s == null)\r
 161                 throw new IllegalStateException("ActivationManager is disposed");\r
 162                 Activation activation = new Activation(r);\r
 163                 try {\r
 164                         activation.execute(session);\r
 165                 } catch (DatabaseException e) {\r
 166                         Logger.defaultLogError(e);\r
 167                 }\r
 168                 return activation;\r
 169         }\r
 170 \r
 171         @Override\r
 172         public IActivation activate(WriteGraph graph, Resource r) throws DatabaseException {\r
 173             Session s = session;\r
 174             if (s == null)\r
 175                 throw new IllegalStateException("ActivationManager is disposed");\r
 176                 Activation activation = new Activation(r);\r
 177                 activation.execute(graph);\r
 178                 return activation;\r
 179         }\r
 180 \r
 181         @Override\r
 182         public void activateOnce(Resource resource) {\r
 183                 activate(resource).runOnceAndDeactivate();              \r
 184         }\r
 185         \r
 186         @Override\r
 187         public void activateOnce(WriteGraph graph, Resource resource) throws DatabaseException {\r
 188                 \r
 189             Session s = session;\r
 190             if (s == null)\r
 191                 throw new IllegalStateException("ActivationManager is disposed");\r
 192             \r
 193             Layer0X L0X = Layer0X.getInstance(graph);\r
 194                 for(Resource r : graph.getObjects(resource, L0X.HasTrigger)) {\r
 195                         new Activation(resource).executeOnce(graph, r);\r
 196                 }\r
 197 \r
 198                 \r
 199         }\r
 200 \r
 201         @Override\r
 202         public void dispose() {\r
 203             session = null;\r
 204         }\r
 205 \r
 206 }\r