org.neo4j.internal.kernel.api.Write.nodeSetProperty()方法的使用及代码示例

x33g5p2x  于2022-02-03 转载在 其他  
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本文整理了Java中org.neo4j.internal.kernel.api.Write.nodeSetProperty()方法的一些代码示例，展示了Write.nodeSetProperty()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.nodeSetProperty()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：nodeSetProperty

Write.nodeSetProperty介绍

[英]Set a property on a node
[中]在节点上设置属性

代码示例

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

private void setProperty( long nodeId, int propertyId, Object value ) throws KernelException
{
  transaction.dataWrite().nodeSetProperty( nodeId, propertyId, Values.of( value ) );
}

代码示例来源：origin: neo4j/neo4j

private void createNodeWithProperty( Transaction tx, int propId1 ) throws KernelException
{
  long node = tx.dataWrite().nodeCreate();
  tx.dataWrite().nodeSetProperty( node, propId1, Values.intValue( 42 ) );
}

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

@Test
public void shouldNotWriteWhenSettingPropertyToSameValue() throws Exception
{
  // Given
  Value theValue = stringValue( "The Value" );
  long nodeId = createNodeWithProperty( propertyKey, theValue.asObject() );
  // When
  Transaction tx = beginTransaction();
  int property = tx.token().propertyKeyGetOrCreateForName( propertyKey );
  assertThat( tx.dataWrite().nodeSetProperty( nodeId, property, theValue ), equalTo( theValue ) );
  tx.success();
  assertThat( tx.closeTransaction(), equalTo( Transaction.READ_ONLY ) );
}

代码示例来源：origin: neo4j/neo4j

private long createLabeledNode( Transaction transaction, String label, String key, Object value )
    throws KernelException
{
  long node = createLabeledNode( transaction, label );
  int propertyKeyId = transaction.tokenWrite().propertyKeyGetOrCreateForName( key );
  transaction.dataWrite().nodeSetProperty( node, propertyKeyId, Values.of( value ) );
  return node;
}

代码示例来源：origin: neo4j/neo4j

@Test
public void shouldRollbackSetNodeProperty() throws Exception
{
  // Given
  long node = createNode();
  // When
  try ( Transaction tx = beginTransaction() )
  {
    int token = tx.token().propertyKeyGetOrCreateForName( propertyKey );
    assertThat( tx.dataWrite().nodeSetProperty( node, token, stringValue( "hello" ) ), equalTo( NO_VALUE ) );
    tx.failure();
  }
  // Then
  assertNoProperty( node, propertyKey );
}

代码示例来源：origin: neo4j/neo4j

@Test
public void shouldAddPropertyToNode() throws Exception
{
  // Given
  long node = createNode();
  // When
  try ( Transaction tx = beginTransaction() )
  {
    int token = tx.token().propertyKeyGetOrCreateForName( propertyKey );
    assertThat( tx.dataWrite().nodeSetProperty( node, token, stringValue( "hello" ) ), equalTo( NO_VALUE ) );
    tx.success();
  }
  // Then
  assertProperty( node, propertyKey, "hello" );
}

代码示例来源：origin: neo4j/neo4j

private long createNode( Transaction transaction, String key, Object value ) throws KernelException
{
  long node = transaction.dataWrite().nodeCreate();
  int propertyKeyId = transaction.tokenWrite().propertyKeyGetOrCreateForName( key );
  transaction.dataWrite().nodeSetProperty( node, propertyKeyId, Values.of( value ) );
  return node;
}

代码示例来源：origin: neo4j/neo4j

@Test
public void shouldUpdatePropertyToNode() throws Exception
{
  // Given
  long node = createNodeWithProperty( propertyKey, 42 );
  // When
  try ( Transaction tx = beginTransaction() )
  {
    int token = tx.token().propertyKeyGetOrCreateForName( propertyKey );
    assertThat( tx.dataWrite().nodeSetProperty( node, token, stringValue( "hello" ) ),
        equalTo( intValue( 42 ) ) );
    tx.success();
  }
  // Then
  assertProperty( node, propertyKey, "hello" );
}

代码示例来源：origin: neo4j/neo4j

@Test
public void shouldAllowRemoveAndAddConflictingDataInOneTransaction_ChangeProperty() throws Exception
{
  // given
  long node = createNodeWithLabelAndProps( label, aValues );
  // when
  newTransaction();
  transaction.dataWrite().nodeSetProperty( node, 0, Values.of( "Alive!" ) );
  long newNode = createLabeledNode( label );
  setProperties( newNode, aValues );
  // then does not fail
  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 shouldAllowNoopPropertyUpdate() throws KernelException
{
  // given
  long node = constrainedNode( "Label1", "key1", "value1" );
  Transaction transaction = newTransaction( AnonymousContext.writeToken() );
  // when
  int key = transaction.tokenWrite().propertyKeyGetOrCreateForName( "key1" );
  transaction.dataWrite().nodeSetProperty( node, key, Values.of( "value1" ) );
  // then should not throw exception
  commit();
}

代码示例来源：origin: neo4j/neo4j

@Test
public void shouldAllowRemoveAndAddConflictingDataInOneTransaction_ChangeProperty() throws Exception
{
  // given
  long node = constrainedNode( "Label1", "key1", "value1" );
  Transaction transaction = newTransaction( AnonymousContext.writeToken() );
  // when
  int propertyKeyId = transaction.tokenWrite().propertyKeyGetOrCreateForName( "key1" );
  transaction.dataWrite().nodeSetProperty( node, propertyKeyId, Values.of( "value2" ) );
  createLabeledNode( transaction, "Label1", "key1", "value1" );
  commit();
}

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

private long createNode()
    throws KernelException
{
  long nodeID;
  try ( Transaction tx = graphDatabaseAPI.beginTx() )
  {
    KernelTransaction ktx = ktx();
    Write write = ktx.dataWrite();
    nodeID = write.nodeCreate();
    write.nodeAddLabel( nodeID, LABEL_ID );
    for ( int propID : index.schema().getPropertyIds() )
    {
      write.nodeSetProperty( nodeID, propID, Values.intValue( propID ) );
    }
    tx.success();
  }
  return nodeID;
}

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

@Test
public void shouldRemoveReSetAndTwiceRemovePropertyOnNode() throws Exception
{
  // given
  long node = createNodeWithProperty( propertyKey, "bar" );
  // when
  try ( Transaction tx = beginTransaction() )
  {
    int prop = tx.token().propertyKeyGetOrCreateForName( propertyKey );
    tx.dataWrite().nodeRemoveProperty( node, prop );
    tx.dataWrite().nodeSetProperty( node, prop, Values.of( "bar" ) );
    tx.dataWrite().nodeRemoveProperty( node, prop );
    tx.dataWrite().nodeRemoveProperty( node, prop );
    tx.success();
  }
  // then
  assertNoProperty( node, propertyKey );
}

代码示例来源：origin: neo4j/neo4j

@Test
public void shouldFindUpdatedNodeInIndexSeek() throws Exception
{
  // Given
  boolean needsValues = false;
  int label = token.nodeLabel( "Node" );
  int prop = token.propertyKey( "prop" );
  IndexReference index = schemaRead.index( label, prop );
  try ( org.neo4j.internal.kernel.api.Transaction tx = beginTransaction();
     NodeValueIndexCursor node = cursors.allocateNodeValueIndexCursor() )
  {
    // when
    tx.dataWrite().nodeSetProperty( strOne, prop, stringValue( "ett" ) );
    tx.dataRead().nodeIndexSeek( index, node, IndexOrder.NONE, needsValues, IndexQuery.exact( prop, "ett" ) );
    // then
    assertTrue( node.next() );
    assertEquals( strOne, node.nodeReference() );
  }
}

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