tests/org.simantics.db.tests/src/org/simantics/db/tests/api/write/request/WriteCancelTest.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.Resource;
  16 import org.simantics.db.WriteGraph;
  17 import org.simantics.db.common.request.WriteRequest;
  18 import org.simantics.db.exception.CancelTransactionException;
  19 import org.simantics.db.exception.DatabaseException;
  20 import org.simantics.db.testing.base.ExistingDatabaseTest;
  21 import org.simantics.layer0.Layer0;
  22
  23 /**
  24  * Checks that unexpected write callback failures do not crash the session and
  25  * that the write request results were correctly committed.
  26  *
  27  * @author Tuukka Lehtonen
  28  */
  29 public class WriteCancelTest extends ExistingDatabaseTest {
  30
  31     private static final String AN_ENTITY = "An entity";
  32     Resource written;
  33     Resource writtenName;
  34
  35         @Test
  36     public void testWriteCancel() throws DatabaseException{
  37
  38         try {
  39             getSession().syncRequest(new WriteRequest() {
  40                 @Override
  41                 public void perform(WriteGraph graph) throws DatabaseException {
  42                     Layer0 b = Layer0.getInstance(graph);
  43                     written = graph.newResource();
  44                     writtenName = graph.newResource();
  45                     graph.claim(written, b.InstanceOf, null, b.Entity);
  46                     graph.claim(writtenName, b.InstanceOf, null, b.String);
  47                     graph.claimValue(writtenName, AN_ENTITY);
  48                     graph.claim(written, b.HasName, writtenName);
  49
  50                     //throw new DatabaseException("Intentional write request cancellation by unexpected exception");
  51                     throw new CancelTransactionException("Intentional write request cancellation");
  52                 }
  53             });
  54         } catch (DatabaseException e) {
  55             if (DEBUG)
  56                 e.printStackTrace();
  57         }
  58
  59         // Make sure that we can at least start a new transaction after the
  60         // cancelled one, but don't do anything yet.
  61         getSession().syncRequest(new WriteRequest() {
  62             @Override
  63             public void perform(WriteGraph graph) throws DatabaseException {
  64             }
  65         });
  66
  67         // Ensure that the previously written data does not exist.
  68         getSession().syncRequest(new WriteRequest() {
  69             @Override
  70             public void perform(WriteGraph graph) throws DatabaseException {
  71                 Layer0 b = Layer0.getInstance(graph);
  72                 assertTrue(!graph.hasStatement(written, b.InstanceOf, b.Entity));
  73                 assertTrue(!graph.hasStatement(written, b.HasName, writtenName));
  74                 assertTrue(!graph.hasStatement(writtenName, b.InstanceOf, b.String));
  75                 assertTrue(!graph.hasValue(writtenName));
  76             }
  77         });
  78     }
  79
  80 }