tests/org.simantics.db.tests/src/org/simantics/db/tests/api/write/request/WriteCancelTest2.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.db.tests.api.write.request;
  13
  14 import org.junit.Test;
  15 import org.simantics.db.ReadGraph;
  16 import org.simantics.db.Resource;
  17 import org.simantics.db.WriteGraph;
  18 import org.simantics.db.common.request.ReadRequest;
  19 import org.simantics.db.common.request.WriteRequest;
  20 import org.simantics.db.exception.CancelTransactionException;
  21 import org.simantics.db.exception.DatabaseException;
  22 import org.simantics.db.service.TransactionSupport;
  23 import org.simantics.db.testing.base.ExistingDatabaseTest;
  24 import org.simantics.layer0.Layer0;
  25
  26 /**
  27  * Checks that asynchronous read requests work correctly with canceled writes
  28  *
  29  * @author Antti Villberg
  30  */
  31 public class WriteCancelTest2 extends ExistingDatabaseTest {
  32
  33     private static final int SIZE = 10000;
  34
  35     Resource[] written = new Resource[SIZE];
  36
  37         @Test
  38     public void testWriteCancel2() throws DatabaseException{
  39
  40         // First create a set of resources for testing
  41         try {
  42
  43             getSession().syncRequest(new WriteRequest() {
  44                 @Override
  45                 public void perform(WriteGraph graph) throws DatabaseException {
  46                     if (DEBUG)
  47                         System.err.println("a");
  48                     for(int i=0;i<SIZE;i++) written[i] = graph.newResource();
  49                     if (DEBUG)
  50                         System.err.println("a2");
  51                 }
  52             });
  53
  54         } catch (DatabaseException e) {
  55             if (DEBUG)
  56                 e.printStackTrace();
  57         }
  58
  59         // Make a decent amount of modifications and cancel them
  60         getSession().asyncRequest(new WriteRequest() {
  61             @Override
  62             public void perform(WriteGraph graph) throws DatabaseException {
  63                 Layer0 L0 = Layer0.getInstance(graph);
  64                 if (DEBUG)
  65                     System.err.println("b");
  66                 for(int i=0;i<SIZE;i++) graph.claim(written[i], L0.IsComposedOf, graph.newResource());
  67                 if (DEBUG)
  68                     System.err.println("b2");
  69                 throw new CancelTransactionException("Intentional write request cancellation");
  70             }
  71         });
  72
  73         // Ensure that the previously written data does not exist.
  74         getSession().asyncRequest(new ReadRequest() {
  75             @Override
  76             public void run(ReadGraph graph) throws DatabaseException {
  77
  78                 Layer0 L0 = Layer0.getInstance(graph);
  79                 if (DEBUG)
  80                     System.err.println("c");
  81                 for(int i=0;i<SIZE;i++)
  82                     assertTrue(!graph.hasStatement(written[i], L0.IsComposedOf));
  83                 if (DEBUG)
  84                     System.err.println("c2");
  85
  86             }
  87         });
  88
  89         // Do not let the test die before asynchronous requests have finished
  90         TransactionSupport support = getSession().getService(TransactionSupport.class);
  91         support.waitCompletion();
  92
  93     }
  94
  95 }