bundles/org.simantics.diagram/src/org/simantics/diagram/synchronization/graph/ModificationProcessRequest.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.diagram.synchronization.graph;
  13
  14 import org.simantics.db.VirtualGraph;
  15 import org.simantics.db.WriteGraph;
  16 import org.simantics.db.common.request.WriteRequest;
  17 import org.simantics.db.exception.DatabaseException;
  18 import org.simantics.db.request.Write;
  19 import org.simantics.diagram.internal.DebugPolicy;
  20 import org.simantics.diagram.internal.timing.GTask;
  21 import org.simantics.diagram.internal.timing.Timing;
  22 import org.simantics.diagram.synchronization.ErrorHandler;
  23 import org.simantics.diagram.synchronization.IModification;
  24
  25 /**
  26  * A graph database write request that composes several {@link IModification}
  27  * instances into a single {@link Write} request.
  28  *
  29  * @author Tuukka Lehtonen
  30  *
  31  * @see IModification
  32  */
  33 public class ModificationProcessRequest extends WriteRequest {
  34
  35     ErrorHandler    errorHandler;
  36     IModification[] modifications;
  37
  38     public ModificationProcessRequest(ErrorHandler errorHandler, IModification[] modifications) {
  39         this.errorHandler = errorHandler;
  40         this.modifications = modifications;
  41     }
  42
  43     public ModificationProcessRequest(ErrorHandler errorHandler, IModification[] modifications, VirtualGraph provider) {
  44         super(provider);
  45         this.errorHandler = errorHandler;
  46         this.modifications = modifications;
  47     }
  48
  49
  50     @Override
  51     public void perform(final WriteGraph g) throws DatabaseException {
  52         g.markUndoPoint();
  53         if (DebugPolicy.DEBUG_GRAPH_WRITEBACK)
  54             System.out.println(Thread.currentThread() + " Performing " + modifications.length + " modifications");
  55         Timing.timed("" + modifications.length + " MODIFICATIONS", new GTask() {
  56             @Override
  57             public void run() throws DatabaseException {
  58                 for (IModification m : modifications) {
  59                     if (m != null) {
  60                         modification(g, m);
  61                     }
  62                 }
  63             }
  64         });
  65     }
  66
  67     public void modification(final WriteGraph g, final IModification m) throws DatabaseException {
  68         Timing.timed(m.toString(), new GTask() {
  69             @Override
  70             public void run() throws DatabaseException {
  71                 synchronized (m) {
  72                     try {
  73                         if (DebugPolicy.DEBUG_GRAPH_WRITEBACK_MODIFICATION)
  74                             System.out.println(Thread.currentThread() + "  Performing modification: " + m);
  75                         m.perform(g);
  76                     } catch (Exception e) {
  77                         m.setException(e);
  78                         errorHandler.error(e.getMessage(), e);
  79                     } catch (Error e) {
  80                         m.setException(e);
  81                         errorHandler.error(e.getMessage(), e);
  82                     } finally {
  83                         m.markComplete();
  84                         m.notifyAll();
  85                     }
  86                 }
  87             }
  88         });
  89     }
  90
  91 }