Ejemplo n.º 1
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  @Test
  public void transactionStateShouldReflectRemovingLabelImmediately() throws Exception {
    // GIVEN
    Transaction tx = db.beginTx();
    Statement statement = statementContextProvider.instance();
    Node node = db.createNode();
    int labelId1 = statement.dataWriteOperations().labelGetOrCreateForName("labello1");
    int labelId2 = statement.dataWriteOperations().labelGetOrCreateForName("labello2");
    statement.dataWriteOperations().nodeAddLabel(node.getId(), labelId1);
    statement.dataWriteOperations().nodeAddLabel(node.getId(), labelId2);
    statement.close();
    tx.success();
    tx.finish();
    tx = db.beginTx();
    statement = statementContextProvider.instance();

    // WHEN
    statement.dataWriteOperations().nodeRemoveLabel(node.getId(), labelId2);

    // THEN
    PrimitiveIntIterator labelsIterator = statement.readOperations().nodeGetLabels(node.getId());
    Set<Integer> labels = asSet(labelsIterator);
    assertFalse(statement.readOperations().nodeHasLabel(node.getId(), labelId2));
    assertEquals(asSet(labelId1), labels);
    statement.close();
    tx.success();
    tx.finish();
  }
Ejemplo n.º 2
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  /**
   * While we transition ownership from the Beans API to the Kernel API for core database
   * interactions, there will be a bit of a mess. Our first goal is an architecture like this:
   *
   * <p>Users / \ Beans API Cypher \ / Kernel API | Kernel Implementation
   *
   * <p>But our current intermediate architecture looks like this:
   *
   * <p>Users / \ Beans API <--- Cypher | \ / | Kernel API | | Kernel Implementation
   *
   * <p>Meaning Kernel API and Beans API both manipulate the underlying kernel, causing lots of
   * corner cases. Most notably, those corner cases are related to Transactions, and the interplay
   * between three transaction APIs: - The Beans API - The JTA Transaction Manager API - The Kernel
   * TransactionContext API
   *
   * <p>In the long term, the goal is for JTA compliant stuff to live outside of the kernel, as an
   * addon. The Kernel API will rule supreme over the land of transactions. We are a long way away
   * from there, however, so as a first intermediary step, the JTA transaction manager rules
   * supreme, and the Kernel API piggybacks on it.
   *
   * <p>This test shows us how to use both the Kernel API and the Beans API together in the same
   * transaction, during the transition phase.
   */
  @Test
  public void mixingBeansApiWithKernelAPI() throws Exception {
    // 1: Start your transactions through the Beans API
    Transaction beansAPITx = db.beginTx();

    // 2: Get a hold of a KernelAPI statement context for the *current* transaction this way:
    Statement statement = statementContextProvider.instance();

    // 3: Now you can interact through both the statement context and the kernel API to manipulate
    // the
    //    same transaction.
    Node node = db.createNode();

    int labelId = statement.dataWriteOperations().labelGetOrCreateForName("labello");
    statement.dataWriteOperations().nodeAddLabel(node.getId(), labelId);

    // 4: Close the StatementContext
    statement.close();

    // 5: Commit through the beans API
    beansAPITx.success();
    beansAPITx.finish();

    // NOTE: Transactions are still thread-bound right now, because we use JTA to "own"
    // transactions,
    // meaning if you use
    // both the Kernel API to create transactions while a Beans API transaction is running in the
    // same
    // thread, the results are undefined.

    // When the Kernel API implementation is done, the Kernel API transaction implementation is not
    // meant
    // to be bound to threads.
  }
Ejemplo n.º 3
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  @Test
  public void labelShouldBeRemovedAfterCommit() throws Exception {
    // GIVEN
    Transaction tx = db.beginTx();
    Statement statement = statementContextProvider.instance();
    Node node = db.createNode();
    int labelId1 = statement.dataWriteOperations().labelGetOrCreateForName("labello1");
    statement.dataWriteOperations().nodeAddLabel(node.getId(), labelId1);
    statement.close();
    tx.success();
    tx.finish();

    // WHEN
    tx = db.beginTx();
    statement = statementContextProvider.instance();
    statement.dataWriteOperations().nodeRemoveLabel(node.getId(), labelId1);
    statement.close();
    tx.success();
    tx.finish();

    // THEN
    tx = db.beginTx();
    statement = statementContextProvider.instance();
    PrimitiveIntIterator labels = statement.readOperations().nodeGetLabels(node.getId());
    statement.close();
    tx.success();
    tx.finish();

    assertThat(asSet(labels), equalTo(Collections.<Integer>emptySet()));
  }
Ejemplo n.º 4
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  @Test
  public void shouldNotBeAbleToCommitIfFailedTransactionContext() throws Exception {
    Transaction tx = db.beginTx();
    Statement statement = statementContextProvider.instance();

    // WHEN
    Node node = null;
    int labelId = -1;
    try {
      node = db.createNode();
      labelId = statement.dataWriteOperations().labelGetOrCreateForName("labello");
      statement.dataWriteOperations().nodeAddLabel(node.getId(), labelId);
      statement.close();
      tx.failure();
      tx.success();
      tx.finish();
      fail("Should have failed");
    } catch (TransactionFailureException e) { // Expected
    }

    // THEN
    tx = db.beginTx();
    statement = statementContextProvider.instance();
    try {
      statement.readOperations().nodeHasLabel(node.getId(), labelId);
      fail("should have thrown exception");
    } catch (EntityNotFoundException e) {
      // Yay!
    }
    tx.finish();
  }
Ejemplo n.º 5
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  @Test
  public void mixingBeansApiWithKernelAPIForNestedTransaction() throws Exception {
    // GIVEN
    Transaction outerTx = db.beginTx();
    Statement statement = statementContextProvider.instance();

    // WHEN
    Node node = db.createNode();
    int labelId = statement.dataWriteOperations().labelGetOrCreateForName("labello");
    statement.dataWriteOperations().nodeAddLabel(node.getId(), labelId);
    statement.close();
    outerTx.finish();
  }
 private long createNode(
     Statement statement, String labelName, String propertyKeyName, Object value)
     throws KernelException {
   int labelId = statement.tokenWriteOperations().labelGetOrCreateForName(labelName);
   int propertyKeyId =
       statement.tokenWriteOperations().propertyKeyGetOrCreateForName(propertyKeyName);
   long nodeId = statement.dataWriteOperations().nodeCreate();
   statement.dataWriteOperations().nodeAddLabel(nodeId, labelId);
   statement
       .dataWriteOperations()
       .nodeSetProperty(nodeId, Property.property(propertyKeyId, value));
   return nodeId;
 }
Ejemplo n.º 7
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  @Test
  public void deletingNodeWithLabelsShouldHaveThoseLabelRemovalsReflectedInTransaction()
      throws Exception {
    // GIVEN
    Transaction tx = db.beginTx();
    Label label = label("labello");
    Node node = db.createNode(label);
    tx.success();
    tx.finish();

    tx = db.beginTx();
    Statement statement = statementContextProvider.instance();

    // WHEN
    statement.dataWriteOperations().nodeDelete(node.getId());

    // Then
    int labelId = statement.readOperations().labelGetForName(label.name());
    Set<Integer> labels = asSet(statement.readOperations().nodeGetLabels(node.getId()));
    boolean labelIsSet = statement.readOperations().nodeHasLabel(node.getId(), labelId);
    Set<Long> nodes = asSet(statement.readOperations().nodesGetForLabel(labelId));

    statement.close();

    tx.success();
    tx.finish();

    assertEquals(emptySetOf(Long.class), nodes);
    assertEquals(emptySetOf(Integer.class), labels);
    assertFalse("Label should not be set on node here", labelIsSet);
  }
 private void deleteNode(long nodeId) throws KernelException {
   try (Transaction tx = db.beginTx()) {
     Statement statement = bridge.instance();
     statement.dataWriteOperations().nodeDelete(nodeId);
     tx.success();
   }
 }
Ejemplo n.º 9
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  @Test
  public void removingNonExistentLabelFromNodeShouldRespondFalse() throws Exception {
    // GIVEN
    Transaction tx = db.beginTx();
    Node node = db.createNode();
    Statement statement = statementContextProvider.instance();
    int labelId = statement.dataWriteOperations().labelGetOrCreateForName("mylabel");
    statement.close();
    tx.success();
    tx.finish();

    // WHEN
    tx = db.beginTx();
    statement = statementContextProvider.instance();
    boolean removed = statement.dataWriteOperations().nodeRemoveLabel(node.getId(), labelId);

    // THEN
    assertFalse("Shouldn't have been removed now", removed);
    tx.finish();
  }
Ejemplo n.º 10
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  @Test
  public void addingExistingLabelToNodeShouldRespondFalse() throws Exception {
    // GIVEN
    Transaction tx = db.beginTx();
    Node node = db.createNode();
    Statement statement = statementContextProvider.instance();
    int labelId = statement.dataWriteOperations().labelGetOrCreateForName("mylabel");
    statement.close();
    tx.success();
    tx.finish();

    // WHEN
    tx = db.beginTx();
    statement = statementContextProvider.instance();
    boolean added = statement.dataWriteOperations().nodeAddLabel(node.getId(), labelId);

    // THEN
    assertTrue("Should have been added now", added);
    tx.finish();
  }
 private void changeName(long nodeId, String propertyKeyName, Object newValue)
     throws KernelException {
   try (Transaction tx = db.beginTx()) {
     Statement statement = bridge.instance();
     int propertyKeyId =
         statement.tokenWriteOperations().propertyKeyGetOrCreateForName(propertyKeyName);
     statement
         .dataWriteOperations()
         .nodeSetProperty(nodeId, Property.property(propertyKeyId, newValue));
     tx.success();
   }
 }
Ejemplo n.º 12
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  @Test
  public void transactionStateShouldRemovePreviouslyAddedLabel() throws Exception {
    Transaction tx = db.beginTx();
    Statement statement = statementContextProvider.instance();

    // WHEN
    Node node = db.createNode();
    int labelId1 = statement.dataWriteOperations().labelGetOrCreateForName("labello1");
    int labelId2 = statement.dataWriteOperations().labelGetOrCreateForName("labello2");
    statement.dataWriteOperations().nodeAddLabel(node.getId(), labelId1);
    statement.dataWriteOperations().nodeAddLabel(node.getId(), labelId2);
    statement.dataWriteOperations().nodeRemoveLabel(node.getId(), labelId2);
    statement.close();
    tx.success();
    tx.finish();

    // THEN
    tx = db.beginTx();
    statement = statementContextProvider.instance();

    assertEquals(asSet(labelId1), asSet(statement.readOperations().nodeGetLabels(node.getId())));

    tx.finish();
  }
Ejemplo n.º 13
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  @Test
  public void changesInTransactionContextShouldBeRolledBackWhenTxIsRolledBack() throws Exception {
    // GIVEN
    Transaction tx = db.beginTx();
    Statement statement = statementContextProvider.instance();

    // WHEN
    Node node = db.createNode();
    int labelId = statement.dataWriteOperations().labelGetOrCreateForName("labello");
    statement.dataWriteOperations().nodeAddLabel(node.getId(), labelId);
    statement.close();
    tx.finish();

    // THEN
    tx = db.beginTx();
    statement = statementContextProvider.instance();
    try {
      statement.readOperations().nodeHasLabel(node.getId(), labelId);
      fail("should have thrown exception");
    } catch (EntityNotFoundException e) {
      // Yay!
    }
    tx.finish();
  }