bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/queries/QueryExecutor2.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.layer0.utils.queries;
  13
  14 import org.simantics.db.AsyncReadGraph;
  15 import org.simantics.db.RequestProcessor;
  16 import org.simantics.db.WriteGraph;
  17 import org.simantics.db.common.procedure.adapter.AsyncMultiProcedureAdapter;
  18 import org.simantics.db.common.request.ReadRequest;
  19 import org.simantics.db.exception.DatabaseException;
  20 import org.simantics.db.procedure.AsyncListener;
  21 import org.simantics.db.procedure.AsyncMultiProcedure;
  22 import org.simantics.db.request.AsyncMultiRead;
  23
  24 @Deprecated
  25 public abstract class QueryExecutor2 extends ReadRequest implements AsyncListener<Object> {
  26
  27 //      Object DUMMY = new Object();
  28 //
  29 //      @Override
  30 //      public void perform(SyncReadGraph graph,
  31 //              SingleQueryProcedure4<Object> procedure) {
  32 //              doPerform(graph);
  33 //              procedure.execute(graph, DUMMY);
  34 //
  35 //      }
  36
  37 //      protected abstract void doPerform(SyncReadGraph g);
  38
  39         @Override
  40         public void execute(AsyncReadGraph graph, Object result) {
  41         }
  42
  43         public void execute(WriteGraph graph) throws DatabaseException {
  44                 graph.syncRequest(QueryExecutor2.this, QueryExecutor2.this);
  45         }
  46
  47         public void execute(RequestProcessor processor) throws DatabaseException {
  48
  49                 AsyncMultiRead<Object> request = new AsyncMultiRead<Object>() {
  50
  51                         @Override
  52                         public int threadHash() {
  53                                 return hashCode();
  54                         }
  55
  56                         @Override
  57                         public void perform(AsyncReadGraph graph,
  58                                         AsyncMultiProcedure<Object> callback) {
  59                                 graph.asyncRequest(QueryExecutor2.this, QueryExecutor2.this);
  60                                 callback.finished(graph);
  61                         }
  62
  63                 };
  64
  65                 AsyncMultiProcedureAdapter<Object> procedure = new AsyncMultiProcedureAdapter<Object>() {
  66
  67                         @Override
  68                         public void exception(AsyncReadGraph graph, Throwable t) {
  69                                 t.printStackTrace();
  70                         }
  71
  72                 };
  73
  74                 if(processor instanceof WriteGraph) processor.syncRequest(request, procedure);
  75                 else processor.asyncRequest(request, procedure);
  76
  77         }
  78
  79         @Override
  80         public void exception(AsyncReadGraph graph, Throwable t) {
  81                 t.printStackTrace();
  82         }
  83
  84 }