org.neo4j.server.database.Database类的使用及代码示例

x33g5p2x  于2022-01-18 转载在 其他  
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本文整理了Java中org.neo4j.server.database.Database类的一些代码示例，展示了Database类的具体用法。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。Database类的具体详情如下：
包路径：org.neo4j.server.database.Database
类名称：Database

Database介绍

暂无

代码示例

代码示例来源：origin: neo4j/neo4j

private long createNode( Map<String, Object> properties )
{
  long nodeId;
  try ( Transaction tx = database.getGraph().beginTx() )
  {
    Node node = database.getGraph().createNode( LABEL );
    for ( Map.Entry<String, Object> entry : properties.entrySet() )
    {
      node.setProperty( entry.getKey(), entry.getValue() );
    }
    nodeId = node.getId();
    tx.success();
  }
  return nodeId;
}

代码示例来源：origin: neo4j/neo4j

private static void removeLogs( NeoServer server )
{
  File logDir = new File( server.getDatabase().getLocation() + File.separator + ".." + File.separator + "log" );
  try
  {
    FileUtils.deleteDirectory( logDir );
  }
  catch ( IOException e )
  {
    throw new RuntimeException( e );
  }
}

代码示例来源：origin: neo4j/neo4j

public boolean isRunning()
{
  return server != null && server.getDatabase() != null && server.getDatabase().isRunning();
}

代码示例来源：origin: neo4j/neo4j

@Test
  public void shouldBeAbleToGetLocation() throws Throwable
  {
    theDatabase.start();
    assertThat( theDatabase.getLocation().getAbsolutePath(),
        is( dbConfig.get( GraphDatabaseSettings.database_path ).getAbsolutePath() ) );
  }
}

代码示例来源：origin: neo4j/neo4j

public Index<Node> createNodeIndex( String named )
{
  try ( Transaction transaction = database.getGraph().beginTransaction( implicit, AUTH_DISABLED ) )
  {
    Index<Node> nodeIndex = database.getGraph().index()
        .forNodes( named );
    transaction.success();
    return nodeIndex;
  }
}

代码示例来源：origin: neo4j/neo4j

public long createNode( Label... labels )
{
  try ( Transaction tx = database.getGraph().beginTransaction( implicit, AnonymousContext.writeToken() ) )
  {
    Node node = database.getGraph().createNode( labels );
    tx.success();
    return node.getId();
  }
}

代码示例来源：origin: neo4j/neo4j

@Test
public void shouldOverwriteExistingProperties() throws PropertyValueException,
    NodeNotFoundException
{
  long nodeId;
  try ( Transaction tx = database.getGraph().beginTx() )
  {
    Node node = database.getGraph().createNode();
    node.setProperty( "remove me", "trash" );
    nodeId = node.getId();
    tx.success();
  }
  Map<String, Object> properties = new HashMap<>();
  properties.put( "foo", "bar" );
  properties.put( "baz", 17 );
  actions.setAllNodeProperties( nodeId, properties );
  try ( Transaction tx = database.getGraph().beginTx() )
  {
    Node node = database.getGraph().getNodeById( nodeId );
    assertHasProperties( node, properties );
    assertNull( node.getProperty( "remove me", null ) );
  }
}

代码示例来源：origin: neo4j/neo4j

@Override
public void start()
{
  DependencyResolver resolver = database.getGraph().getDependencyResolver();
  this.executionEngine = (ExecutionEngine) resolver.resolveDependency( QueryExecutionEngine.class );
  this.service = resolver.resolveDependency( GraphDatabaseQueryService.class );
  this.contextFactory = Neo4jTransactionalContextFactory.create( this.service, locker );
}

代码示例来源：origin: neo4j/neo4j

@Test
public void shouldBeAbleToRemoveNodeProperty() throws Exception
{
  Map<String, Object> properties = new HashMap<>();
  properties.put( "foo", "bar" );
  properties.put( "number", 15 );
  long nodeId = createNode( properties );
  actions.removeNodeProperty( nodeId, "foo" );
  try ( Transaction tx = database.getGraph().beginTx() )
  {
    Node node = database.getGraph().getNodeById( nodeId );
    assertEquals( 15, node.getProperty( "number" ) );
    assertFalse( node.hasProperty( "foo" ) );
    tx.success();
  }
}

代码示例来源：origin: neo4j/neo4j

@Test
public void shouldWorkWithPoint2DArrays() throws Exception
{
  HTTP.Response response =
      runQuery( "create (:Node {points: [point({x:1, y:1}), point({x:2, y:2}), point({x: 3.0, y: 3.0})]})" );
  assertEquals( 200, response.status() );
  assertNoErrors( response );
  GraphDatabaseFacade db = server().getDatabase().getGraph();
  try ( Transaction tx = db.beginTx() )
  {
    for ( Node node : db.getAllNodes() )
    {
      if ( node.hasLabel( label( "Node" ) ) && node.hasProperty( "points" ) )
      {
        Point[] points = (Point[]) node.getProperty( "points" );
        verifyPoint( points[0], Cartesian, 1.0, 1.0 );
        verifyPoint( points[1], Cartesian, 2.0, 2.0 );
        verifyPoint( points[2], Cartesian, 3.0, 3.0 );
      }
    }
    tx.success();
  }
}

代码示例来源：origin: neo4j/neo4j

public long createRelationship( String type, long startNodeId, long endNodeId )
{
  try ( Transaction tx = database.getGraph().beginTransaction( implicit, AnonymousContext.writeToken() ) )
  {
    Node startNode = database.getGraph().getNodeById( startNodeId );
    Node endNode = database.getGraph().getNodeById( endNodeId );
    Relationship relationship = startNode.createRelationshipTo( endNode, RelationshipType.withName( type ) );
    tx.success();
    return relationship.getId();
  }
}

代码示例来源：origin: neo4j/neo4j

public long createRelationship( String type )
{
  try ( Transaction tx = database.getGraph().beginTransaction( implicit, AnonymousContext.writeToken() ) )
  {
    Node startNode = database.getGraph().createNode();
    Node endNode = database.getGraph().createNode();
    Relationship relationship = startNode.createRelationshipTo( endNode,
        RelationshipType.withName( type ) );
    tx.success();
    return relationship.getId();
  }
}

代码示例来源：origin: neo4j/neo4j

public void setNodeProperties( long nodeId, Map<String, Object> properties )
{
  try ( Transaction tx = database.getGraph().beginTransaction( implicit, AnonymousContext.writeToken() ) )
  {
    Node node = database.getGraph().getNodeById( nodeId );
    for ( Map.Entry<String, Object> propertyEntry : properties.entrySet() )
    {
      node.setProperty( propertyEntry.getKey(), propertyEntry.getValue() );
    }
    tx.success();
  }
}

代码示例来源：origin: neo4j/neo4j

public Index<Relationship> createRelationshipIndex( String named )
{
  try ( Transaction transaction = database.getGraph().beginTransaction( implicit, AUTH_DISABLED ) )
  {
    RelationshipIndex relationshipIndex = database.getGraph().index()
        .forRelationships( named );
    transaction.success();
    return relationshipIndex;
  }
}

代码示例来源：origin: neo4j/neo4j

@Test
public void shouldBeAbleToGetPropertiesOnRelationship() throws Exception
{
  long relationshipId;
  Map<String, Object> properties = new HashMap<>();
  properties.put( "foo", "bar" );
  properties.put( "neo", "Thomas A. Anderson" );
  properties.put( "number", 15L );
  try ( Transaction tx = database.getGraph().beginTx() )
  {
    Node startNode = database.getGraph().createNode();
    Node endNode = database.getGraph().createNode();
    Relationship relationship = startNode.createRelationshipTo( endNode,
        RelationshipType.withName( "knows" ) );
    for ( Map.Entry<String, Object> entry : properties.entrySet() )
    {
      relationship.setProperty( entry.getKey(), entry.getValue() );
    }
    relationshipId = relationship.getId();
    tx.success();
  }
  try ( Transaction transaction = graph.beginTx() )
  {
    assertEquals( properties, serialize( actions.getAllRelationshipProperties( relationshipId ) ) );
  }
}

代码示例来源：origin: neo4j/neo4j

private long createNode()
{
  GraphDatabaseService graphdb = server().getDatabase().getGraph();
  try ( Transaction tx = graphdb.beginTx() )
  {
    Node node = graphdb.createNode();
    tx.success();
    return node.getId();
  }
}

代码示例来源：origin: neo4j/neo4j

public void deleteNode( long id )
{
  try ( Transaction tx = database.getGraph().beginTransaction( implicit, AnonymousContext.write() ) )
  {
    Node node = database.getGraph().getNodeById( id );
    node.delete();
    tx.success();
  }
}

代码示例来源：origin: neo4j/neo4j

public Relationship getRelationship( long relationshipId )
{
  try ( Transaction tx = database.getGraph().beginTransaction( implicit, AnonymousContext.read() ) )
  {
    Relationship relationship = database.getGraph().getRelationshipById( relationshipId );
    tx.success();
    return relationship;
  }
}

代码示例来源：origin: neo4j/neo4j

public IndexDefinition createSchemaIndex( String labelName, String propertyKey )
{
  try ( Transaction tx = database.getGraph().beginTransaction( implicit, AUTH_DISABLED ) )
  {
    IndexDefinition index = database.getGraph().schema().indexFor( label( labelName ) ).on( propertyKey ).create();
    tx.success();
    return index;
  }
}

代码示例来源：origin: neo4j/neo4j

public void addLabelToNode( long node, String labelName )
{
  try ( Transaction tx = database.getGraph().beginTransaction( implicit, AnonymousContext.writeToken() ) )
  {
    database.getGraph().getNodeById( node ).addLabel( label( labelName ) );
    tx.success();
  }
}

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