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