org.apache.tinkerpop.gremlin.structure

Interface Graph.Features.GraphFeatures

All Superinterfaces:

Graph.Features.FeatureSet

All Known Implementing Classes:

EmptyGraph.EmptyGraphFeatures.EmptyGraphGraphFeatures, Neo4jGraph.Neo4jGraphFeatures.Neo4jGraphGraphFeatures, RemoteGraph.RemoteGraphFeatures, TinkerGraph.TinkerGraphGraphFeatures

Enclosing interface:

Graph.Features

public static interface Graph.Features.GraphFeatures
extends Graph.Features.FeatureSet

Features specific to a operations of a "graph".

Field Summary

Fields

Modifier and Type	Field and Description
static String	FEATURE_COMPUTER
static String	FEATURE_CONCURRENT_ACCESS
static String	FEATURE_IO_READ
static String	FEATURE_IO_WRITE
static String	FEATURE_PERSISTENCE
static String	FEATURE_THREADED_TRANSACTIONS
static String	FEATURE_TRANSACTIONS

Method Summary

Modifier and Type	Method and Description
default boolean	supportsComputer() Determines if the Graph implementation supports GraphComputer based processing.
default boolean	supportsConcurrentAccess() Determines if the Graph implementation supports more than one connection to the same instance at the same time.
default boolean	supportsIoRead() Determines if the Graph implementations supports read operations as executed with the GraphTraversalSource.io(String) step.
default boolean	supportsIoWrite() Determines if the Graph implementations supports write operations as executed with the GraphTraversalSource.io(String) step.
default boolean	supportsPersistence() Determines if the Graph implementation supports persisting it's contents natively to disk.
default boolean	supportsThreadedTransactions() Determines if the Graph implementation supports threaded transactions which allow a transaction to be executed across multiple threads via Transaction.createThreadedTx().
default boolean	supportsTransactions() Determines if the Graph implementations supports transactions.
default Graph.Features.VariableFeatures	variables() Gets the features related to "graph sideEffects" operation.

Field Detail

FEATURE_COMPUTER

static final String FEATURE_COMPUTER

See Also:

Constant Field Values

FEATURE_TRANSACTIONS

static final String FEATURE_TRANSACTIONS

See Also:

Constant Field Values

FEATURE_PERSISTENCE

static final String FEATURE_PERSISTENCE

See Also:

Constant Field Values

FEATURE_THREADED_TRANSACTIONS

static final String FEATURE_THREADED_TRANSACTIONS

See Also:

Constant Field Values

FEATURE_CONCURRENT_ACCESS

static final String FEATURE_CONCURRENT_ACCESS

See Also:

Constant Field Values

FEATURE_IO_READ

static final String FEATURE_IO_READ

See Also:

Constant Field Values

FEATURE_IO_WRITE

static final String FEATURE_IO_WRITE

See Also:

Constant Field Values

Method Detail

supportsComputer

default boolean supportsComputer()

Determines if the Graph implementation supports GraphComputer based processing.

supportsPersistence

default boolean supportsPersistence()

Determines if the Graph implementation supports persisting it's contents natively to disk. This feature does not refer to every graph's ability to write to disk via the Gremlin IO packages (.e.g. GraphML), unless the graph natively persists to disk via those options somehow. For example, TinkerGraph does not support this feature as it is a pure in-sideEffects graph.

supportsConcurrentAccess

default boolean supportsConcurrentAccess()

Determines if the Graph implementation supports more than one connection to the same instance at the same time. For example, Neo4j embedded does not support this feature because concurrent access to the same database files by multiple instances is not possible. However, Neo4j HA could support this feature as each new Graph instance coordinates with the Neo4j cluster allowing multiple instances to operate on the same database.

supportsTransactions

default boolean supportsTransactions()

Determines if the Graph implementations supports transactions.

supportsThreadedTransactions

default boolean supportsThreadedTransactions()

Determines if the Graph implementation supports threaded transactions which allow a transaction to be executed across multiple threads via Transaction.createThreadedTx().

supportsIoRead

default boolean supportsIoRead()

Determines if the Graph implementations supports read operations as executed with the GraphTraversalSource.io(String) step. Graph implementations will generally support this by default as any graph that can support direct mutation through the Structure API will by default accept data from the standard TinkerPop GraphReader implementations. However, some graphs like HadoopGraph don't accept direct mutations but can still do reads from that io() step.

supportsIoWrite

default boolean supportsIoWrite()

Determines if the Graph implementations supports write operations as executed with the GraphTraversalSource.io(String) step. Graph implementations will generally support this by default given the standard TinkerPop GraphWriter implementations. However, some graphs like HadoopGraph will use a different approach to handle writes.

variables

default Graph.Features.VariableFeatures variables()

Gets the features related to "graph sideEffects" operation.