本文整理了Java中org.neo4j.internal.kernel.api.Write.nodeAddLabel()方法的一些代码示例，展示了Write.nodeAddLabel()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Write.nodeAddLabel()方法的具体详情如下：
包路径：org.neo4j.internal.kernel.api.Write
类名称：Write
方法名：nodeAddLabel

Write.nodeAddLabel介绍

[英]Add a label to a node
[中]将标签添加到节点

代码示例

代码示例来源：origin: neo4j/neo4j

private long createNode( Write write, int... labels ) throws KernelException
  {
    long nodeId = write.nodeCreate();
    for ( int label : labels )
    {
      write.nodeAddLabel( nodeId, label );
    }
    return nodeId;
  }
}

代码示例来源：origin: neo4j/neo4j

private void addLabel( long nodeId, int labelId ) throws KernelException
{
  transaction.dataWrite().nodeAddLabel( nodeId, labelId );
}

代码示例来源：origin: neo4j/neo4j

private long createLabeledNode( int labelId ) throws KernelException
{
  long node = transaction.dataWrite().nodeCreate();
  transaction.dataWrite().nodeAddLabel( node, labelId );
  return node;
}

代码示例来源：origin: neo4j/neo4j

private long createNodeWithValue( Value value ) throws KernelException
{
  Write write = dataWriteInNewTransaction();
  long nodeId = write.nodeCreate();
  write.nodeAddLabel( nodeId, labelId );
  write.nodeSetProperty( nodeId, propertyId1, value );
  commit();
  return nodeId;
}

代码示例来源：origin: neo4j/neo4j

private long createLabeledNode( Transaction transaction, String label ) throws KernelException
{
  long node = transaction.dataWrite().nodeCreate();
  int labelId = transaction.tokenWrite().labelGetOrCreateForName( label );
  transaction.dataWrite().nodeAddLabel( node, labelId );
  return node;
}

代码示例来源：origin: neo4j/neo4j

private long createNodeWithValues( Value value1, Value value2 ) throws KernelException
{
  Write write = dataWriteInNewTransaction();
  long nodeId = write.nodeCreate();
  write.nodeAddLabel( nodeId, labelId );
  write.nodeSetProperty( nodeId, propertyId1, value1 );
  write.nodeSetProperty( nodeId, propertyId2, value2 );
  commit();
  return nodeId;
}

代码示例来源：origin: neo4j/neo4j

@Test
public void shouldNotAddLabelToNonExistingNode() throws Exception
{
  long node = 1337L;
  try ( Transaction tx = beginTransaction() )
  {
    int labelId = tx.token().labelGetOrCreateForName( labelName );
    exception.expect( KernelException.class );
    tx.dataWrite().nodeAddLabel( node, labelId );
  }
}

代码示例来源：origin: neo4j/neo4j

@Test
public void listAllLabels() throws Throwable
{
  // Given
  Transaction transaction = newTransaction( AnonymousContext.writeToken() );
  long nodeId = transaction.dataWrite().nodeCreate();
  int labelId = transaction.tokenWrite().labelGetOrCreateForName( "MyLabel" );
  transaction.dataWrite().nodeAddLabel( nodeId, labelId );
  commit();
  // When
  RawIterator<Object[],ProcedureException> stream =
      procs().procedureCallRead( procs().procedureGet( procedureName( "db", "labels" ) ).id(), new Object[0] );
  // Then
  assertThat( asList( stream ), contains( equalTo( new Object[]{"MyLabel"} ) ) );
}

代码示例来源：origin: neo4j/neo4j

public Node createNode( String... labels ) throws Exception
{
  long node;
  int[] labelIds = new int[labels.length];
  try ( Transaction tx = beginTransaction() )
  {
    Write write = tx.dataWrite();
    node = write.nodeCreate();
    for ( int i = 0; i < labels.length; i++ )
    {
      labelIds[i] = tx.tokenWrite().labelGetOrCreateForName( labels[i] );
      write.nodeAddLabel( node, labelIds[i] );
    }
    tx.success();
  }
  return new Node( node, labelIds );
}

代码示例来源：origin: neo4j/neo4j

@Test
public void createIndexForAnotherLabelWhileHoldingSharedLockOnOtherLabel() throws KernelException
{
  TokenWrite tokenWrite = tokenWriteInNewTransaction();
  int label2 = tokenWrite.labelGetOrCreateForName( "Label2" );
  Write write = dataWriteInNewTransaction();
  long nodeId = write.nodeCreate();
  write.nodeAddLabel( nodeId, label2 );
  schemaWriteInNewTransaction().indexCreate( descriptor );
  commit();
}

代码示例来源：origin: neo4j/neo4j

@Test
public void shouldAllowNoopLabelUpdate() throws KernelException
{
  // given
  long node = constrainedNode( "Label1", "key1", "value1" );
  Transaction transaction = newTransaction( AnonymousContext.writeToken() );
  // when
  int label = transaction.tokenWrite().labelGetOrCreateForName( "Label1" );
  transaction.dataWrite().nodeAddLabel( node, label );
  // then should not throw exception
  commit();
}

代码示例来源：origin: neo4j/neo4j

private Pair<Long,Value> nodeWithProp( Transaction tx, Object value ) throws Exception
{
  Write write = tx.dataWrite();
  long node = write.nodeCreate();
  write.nodeAddLabel( node, tx.tokenWrite().labelGetOrCreateForName( "Node" ) );
  Value val = Values.of( value );
  write.nodeSetProperty( node, tx.tokenWrite().propertyKeyGetOrCreateForName( "prop" ), val );
  return Pair.of( node, val );
}

代码示例来源：origin: neo4j/neo4j

private Pair<Long,Value> nodeWithProp( Transaction tx, Object value ) throws Exception
  {
    Write write = tx.dataWrite();
    long node = write.nodeCreate();
    write.nodeAddLabel( node, tx.tokenWrite().labelGetOrCreateForName( "Node" ) );
    Value val = Values.of( value );
    write.nodeSetProperty( node, tx.tokenWrite().propertyKeyGetOrCreateForName( "prop" ), val );
    return Pair.of( node, val );
  }
}

代码示例来源：origin: neo4j/neo4j

@Test
public void shouldAddLabelNodeOnce() throws Exception
{
  long node = createNodeWithLabel( labelName );
  try ( Transaction tx = beginTransaction() )
  {
    int labelId = tx.token().labelGetOrCreateForName( labelName );
    assertFalse( tx.dataWrite().nodeAddLabel( node, labelId ) );
    tx.success();
  }
  assertLabels( node, labelName );
}

代码示例来源：origin: neo4j/neo4j

private long createPersonNode( KernelTransaction ktx, Object value )
    throws KernelException
{
  int labelId = ktx.tokenWrite().labelGetOrCreateForName( PERSON_LABEL );
  int propertyKeyId = ktx.tokenWrite().propertyKeyGetOrCreateForName( NAME_PROPERTY );
  long nodeId = ktx.dataWrite().nodeCreate();
  ktx.dataWrite().nodeAddLabel( nodeId, labelId );
  ktx.dataWrite().nodeSetProperty( nodeId, propertyKeyId, Values.of( value ) );
  return nodeId;
}

代码示例来源：origin: neo4j/neo4j

@Test
public void shouldAddLabelNode() throws Exception
{
  // Given
  long node = createNode();
  // When
  try ( Transaction tx = beginTransaction() )
  {
    int labelId = tx.token().labelGetOrCreateForName( labelName );
    assertTrue( tx.dataWrite().nodeAddLabel( node, labelId ) );
    tx.success();
  }
  // Then
  assertLabels( node, labelName );
}

代码示例来源：origin: neo4j/neo4j

@Test
public void mixingBeansApiWithKernelAPI() throws Exception
{
  // 1: Start your transactions through the Beans API
  Transaction transaction = db.beginTx();
  // 2: Get a hold of a KernelAPI transaction this way:
  KernelTransaction ktx = statementContextSupplier.getKernelTransactionBoundToThisThread( true );
  // 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 = ktx.tokenWrite().labelGetOrCreateForName( "labello" );
  ktx.dataWrite().nodeAddLabel( node.getId(), labelId );
  // 4: Commit through the beans API
  transaction.success();
  transaction.close();
}

代码示例来源：origin: neo4j/neo4j

@Test
public void shouldCountNewLabelsFromTxState() throws Exception
{
  // Given
  Node node1 = createNode( "label" );
  Node node2 = createNode();
  try ( org.neo4j.internal.kernel.api.Transaction tx = beginTransaction() )
  {
    // when
    tx.dataWrite().nodeAddLabel( node2.node, node1.labels[0] );
    long countTxState = tx.dataRead().countsForNode( node1.labels[0] );
    long countNoTxState = tx.dataRead().countsForNodeWithoutTxState( node1.labels[0] );
    // then
    assertEquals( 2, countTxState );
    assertEquals( 1, countNoTxState );
  }
}

代码示例来源：origin: neo4j/neo4j

private long constrainedNode( String labelName, String propertyKey, Object propertyValue )
    throws KernelException
{
  long node;
  {
    Transaction transaction = newTransaction( AnonymousContext.writeToken() );
    int label = transaction.tokenWrite().labelGetOrCreateForName( labelName );
    node = transaction.dataWrite().nodeCreate();
    transaction.dataWrite().nodeAddLabel( node, label );
    int key = transaction.tokenWrite().propertyKeyGetOrCreateForName( propertyKey );
    transaction.dataWrite().nodeSetProperty( node, key, Values.of( propertyValue ) );
    commit();
  }
  createConstraint( labelName, propertyKey );
  return node;
}

代码示例来源：origin: neo4j/neo4j

@Ignore
public void shouldFindUpdatedNodeInInConjunctionLabelScan() throws Exception
{
  // Given
  Node node = createNode("label1");
  try ( org.neo4j.internal.kernel.api.Transaction tx = beginTransaction();
     NodeLabelIndexCursor cursor = tx.cursors().allocateNodeLabelIndexCursor() )
  {
    // when
    int label2 = tx.tokenWrite().labelGetOrCreateForName( "label2" );
    tx.dataWrite().nodeAddLabel( node.node, label2 );
    tx.dataRead().nodeLabelIntersectionScan( cursor, node.labels[0], label2 );
    // then
    assertTrue( cursor.next() );
    assertEquals( node.node, cursor.nodeReference() );
  }
}