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

x33g5p2x  于2022-01-18 转载在 其他  
字(7.7k)|赞(0)|评价(0)|浏览(179)

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

  1. private long createNode( Map<String, Object> properties )
  2. {
  3.   long nodeId;
  4.   try ( Transaction tx = database.getGraph().beginTx() )
  5.   {
  6.     Node node = database.getGraph().createNode( LABEL );
  7.     for ( Map.Entry<String, Object> entry : properties.entrySet() )
  8.     {
  9.       node.setProperty( entry.getKey(), entry.getValue() );
  10.     }
  11.     nodeId = node.getId();
  12.     tx.success();
  13.   }
  14.   return nodeId;
  15. }

代码示例来源：origin: neo4j/neo4j

  1. private static void removeLogs( NeoServer server )
  2. {
  3.   File logDir = new File( server.getDatabase().getLocation() + File.separator + ".." + File.separator + "log" );
  4.   try
  5.   {
  6.     FileUtils.deleteDirectory( logDir );
  7.   }
  8.   catch ( IOException e )
  9.   {
  10.     throw new RuntimeException( e );
  11.   }
  12. }

代码示例来源：origin: neo4j/neo4j

  1. public boolean isRunning()
  2. {
  3.   return server != null && server.getDatabase() != null && server.getDatabase().isRunning();
  4. }

代码示例来源：origin: neo4j/neo4j

  1. @Test
  2.   public void shouldBeAbleToGetLocation() throws Throwable
  3.   {
  4.     theDatabase.start();
  5.     assertThat( theDatabase.getLocation().getAbsolutePath(),
  6.         is( dbConfig.get( GraphDatabaseSettings.database_path ).getAbsolutePath() ) );
  7.   }
  8. }

代码示例来源：origin: neo4j/neo4j

  1. public Index<Node> createNodeIndex( String named )
  2. {
  3.   try ( Transaction transaction = database.getGraph().beginTransaction( implicit, AUTH_DISABLED ) )
  4.   {
  5.     Index<Node> nodeIndex = database.getGraph().index()
  6.         .forNodes( named );
  7.     transaction.success();
  8.     return nodeIndex;
  9.   }
  10. }

代码示例来源：origin: neo4j/neo4j

  1. public long createNode( Label... labels )
  2. {
  3.   try ( Transaction tx = database.getGraph().beginTransaction( implicit, AnonymousContext.writeToken() ) )
  4.   {
  5.     Node node = database.getGraph().createNode( labels );
  6.     tx.success();
  7.     return node.getId();
  8.   }
  9. }

代码示例来源：origin: neo4j/neo4j

  1. @Test
  2. public void shouldOverwriteExistingProperties() throws PropertyValueException,
  3.     NodeNotFoundException
  4. {
  5.   long nodeId;
  6.   try ( Transaction tx = database.getGraph().beginTx() )
  7.   {
  8.     Node node = database.getGraph().createNode();
  9.     node.setProperty( "remove me", "trash" );
  10.     nodeId = node.getId();
  11.     tx.success();
  12.   }
  13.   Map<String, Object> properties = new HashMap<>();
  14.   properties.put( "foo", "bar" );
  15.   properties.put( "baz", 17 );
  16.   actions.setAllNodeProperties( nodeId, properties );
  17.   try ( Transaction tx = database.getGraph().beginTx() )
  18.   {
  19.     Node node = database.getGraph().getNodeById( nodeId );
  20.     assertHasProperties( node, properties );
  21.     assertNull( node.getProperty( "remove me", null ) );
  22.   }
  23. }

代码示例来源：origin: neo4j/neo4j

  1. @Override
  2. public void start()
  3. {
  4.   DependencyResolver resolver = database.getGraph().getDependencyResolver();
  5.   this.executionEngine = (ExecutionEngine) resolver.resolveDependency( QueryExecutionEngine.class );
  6.   this.service = resolver.resolveDependency( GraphDatabaseQueryService.class );
  7.   this.contextFactory = Neo4jTransactionalContextFactory.create( this.service, locker );
  8. }

代码示例来源：origin: neo4j/neo4j

  1. @Test
  2. public void shouldBeAbleToRemoveNodeProperty() throws Exception
  3. {
  4.   Map<String, Object> properties = new HashMap<>();
  5.   properties.put( "foo", "bar" );
  6.   properties.put( "number", 15 );
  7.   long nodeId = createNode( properties );
  8.   actions.removeNodeProperty( nodeId, "foo" );
  9.   try ( Transaction tx = database.getGraph().beginTx() )
  10.   {
  11.     Node node = database.getGraph().getNodeById( nodeId );
  12.     assertEquals( 15, node.getProperty( "number" ) );
  13.     assertFalse( node.hasProperty( "foo" ) );
  14.     tx.success();
  15.   }
  16. }

代码示例来源：origin: neo4j/neo4j

  1. @Test
  2. public void shouldWorkWithPoint2DArrays() throws Exception
  3. {
  4.   HTTP.Response response =
  5.       runQuery( "create (:Node {points: [point({x:1, y:1}), point({x:2, y:2}), point({x: 3.0, y: 3.0})]})" );
  6.   assertEquals( 200, response.status() );
  7.   assertNoErrors( response );
  8.   GraphDatabaseFacade db = server().getDatabase().getGraph();
  9.   try ( Transaction tx = db.beginTx() )
  10.   {
  11.     for ( Node node : db.getAllNodes() )
  12.     {
  13.       if ( node.hasLabel( label( "Node" ) ) && node.hasProperty( "points" ) )
  14.       {
  15.         Point[] points = (Point[]) node.getProperty( "points" );
  16.         verifyPoint( points[0], Cartesian, 1.0, 1.0 );
  17.         verifyPoint( points[1], Cartesian, 2.0, 2.0 );
  18.         verifyPoint( points[2], Cartesian, 3.0, 3.0 );
  19.       }
  20.     }
  21.     tx.success();
  22.   }
  23. }

代码示例来源：origin: neo4j/neo4j

  1. public long createRelationship( String type, long startNodeId, long endNodeId )
  2. {
  3.   try ( Transaction tx = database.getGraph().beginTransaction( implicit, AnonymousContext.writeToken() ) )
  4.   {
  5.     Node startNode = database.getGraph().getNodeById( startNodeId );
  6.     Node endNode = database.getGraph().getNodeById( endNodeId );
  7.     Relationship relationship = startNode.createRelationshipTo( endNode, RelationshipType.withName( type ) );
  8.     tx.success();
  9.     return relationship.getId();
  10.   }
  11. }

代码示例来源：origin: neo4j/neo4j

  1. public long createRelationship( String type )
  2. {
  3.   try ( Transaction tx = database.getGraph().beginTransaction( implicit, AnonymousContext.writeToken() ) )
  4.   {
  5.     Node startNode = database.getGraph().createNode();
  6.     Node endNode = database.getGraph().createNode();
  7.     Relationship relationship = startNode.createRelationshipTo( endNode,
  8.         RelationshipType.withName( type ) );
  9.     tx.success();
  10.     return relationship.getId();
  11.   }
  12. }

代码示例来源：origin: neo4j/neo4j

  1. public void setNodeProperties( long nodeId, Map<String, Object> properties )
  2. {
  3.   try ( Transaction tx = database.getGraph().beginTransaction( implicit, AnonymousContext.writeToken() ) )
  4.   {
  5.     Node node = database.getGraph().getNodeById( nodeId );
  6.     for ( Map.Entry<String, Object> propertyEntry : properties.entrySet() )
  7.     {
  8.       node.setProperty( propertyEntry.getKey(), propertyEntry.getValue() );
  9.     }
  10.     tx.success();
  11.   }
  12. }

代码示例来源：origin: neo4j/neo4j

  1. public Index<Relationship> createRelationshipIndex( String named )
  2. {
  3.   try ( Transaction transaction = database.getGraph().beginTransaction( implicit, AUTH_DISABLED ) )
  4.   {
  5.     RelationshipIndex relationshipIndex = database.getGraph().index()
  6.         .forRelationships( named );
  7.     transaction.success();
  8.     return relationshipIndex;
  9.   }
  10. }

代码示例来源：origin: neo4j/neo4j

  1. @Test
  2. public void shouldBeAbleToGetPropertiesOnRelationship() throws Exception
  3. {
  4.   long relationshipId;
  5.   Map<String, Object> properties = new HashMap<>();
  6.   properties.put( "foo", "bar" );
  7.   properties.put( "neo", "Thomas A. Anderson" );
  8.   properties.put( "number", 15L );
  9.   try ( Transaction tx = database.getGraph().beginTx() )
  10.   {
  11.     Node startNode = database.getGraph().createNode();
  12.     Node endNode = database.getGraph().createNode();
  13.     Relationship relationship = startNode.createRelationshipTo( endNode,
  14.         RelationshipType.withName( "knows" ) );
  15.     for ( Map.Entry<String, Object> entry : properties.entrySet() )
  16.     {
  17.       relationship.setProperty( entry.getKey(), entry.getValue() );
  18.     }
  19.     relationshipId = relationship.getId();
  20.     tx.success();
  21.   }
  22.   try ( Transaction transaction = graph.beginTx() )
  23.   {
  24.     assertEquals( properties, serialize( actions.getAllRelationshipProperties( relationshipId ) ) );
  25.   }
  26. }

代码示例来源：origin: neo4j/neo4j

  1. private long createNode()
  2. {
  3.   GraphDatabaseService graphdb = server().getDatabase().getGraph();
  4.   try ( Transaction tx = graphdb.beginTx() )
  5.   {
  6.     Node node = graphdb.createNode();
  7.     tx.success();
  8.     return node.getId();
  9.   }
  10. }

代码示例来源：origin: neo4j/neo4j

  1. public void deleteNode( long id )
  2. {
  3.   try ( Transaction tx = database.getGraph().beginTransaction( implicit, AnonymousContext.write() ) )
  4.   {
  5.     Node node = database.getGraph().getNodeById( id );
  6.     node.delete();
  7.     tx.success();
  8.   }
  9. }

代码示例来源：origin: neo4j/neo4j

  1. public Relationship getRelationship( long relationshipId )
  2. {
  3.   try ( Transaction tx = database.getGraph().beginTransaction( implicit, AnonymousContext.read() ) )
  4.   {
  5.     Relationship relationship = database.getGraph().getRelationshipById( relationshipId );
  6.     tx.success();
  7.     return relationship;
  8.   }
  9. }

代码示例来源：origin: neo4j/neo4j

  1. public IndexDefinition createSchemaIndex( String labelName, String propertyKey )
  2. {
  3.   try ( Transaction tx = database.getGraph().beginTransaction( implicit, AUTH_DISABLED ) )
  4.   {
  5.     IndexDefinition index = database.getGraph().schema().indexFor( label( labelName ) ).on( propertyKey ).create();
  6.     tx.success();
  7.     return index;
  8.   }
  9. }

代码示例来源：origin: neo4j/neo4j

  1. public void addLabelToNode( long node, String labelName )
  2. {
  3.   try ( Transaction tx = database.getGraph().beginTransaction( implicit, AnonymousContext.writeToken() ) )
  4.   {
  5.     database.getGraph().getNodeById( node ).addLabel( label( labelName ) );
  6.     tx.success();
  7.   }
  8. }

内容来源于网络，如有侵权，请联系作者删除！

Database

相关文章

    查看更多

    热门标签

    更多
    JavaquerypythonNode开发语言requestUtil数据库Table后端算法LoggerMessageElementParser

    最新文章

    更多
    • 蜀ICP备13028337号-1 大数据知识库 https://www.saoniuhuo.com © All rights reserved
    • 本站内容来源互联网,如果侵犯您的权益请联系我们删除, 联系方式：448109455@qq.com