org.apache.tinkerpop.gremlin.server.op.traversal

Class TraversalOpProcessor

java.lang.Object

org.apache.tinkerpop.gremlin.server.op.AbstractOpProcessor

org.apache.tinkerpop.gremlin.server.op.traversal.TraversalOpProcessor

All Implemented Interfaces:

AutoCloseable, OpProcessor

public class TraversalOpProcessor
extends AbstractOpProcessor

Simple OpProcessor implementation that iterates remotely submitted serialized Traversal objects.

Author:

Stephen Mallette (http://stephen.genoprime.com)

Field Summary

Fields

Modifier and Type	Field and Description
protected static <any>	cache
static String	CONFIG_CACHE_EXPIRATION_TIME Configuration setting for how long a cached side-effect will be available before it is evicted from the cache.
static String	CONFIG_CACHE_MAX_SIZE Configuration setting for the maximum number of entries the cache will have.
static long	DEFAULT_CACHE_EXPIRATION_TIME Default timeout for a cached side-effect is ten minutes.
static long	DEFAULT_CACHE_MAX_SIZE Default size of the max size of the cache.
static Settings.ProcessorSettings	DEFAULT_SETTINGS
static String	OP_PROCESSOR_NAME
static Timer	traversalOpTimer

Fields inherited from class org.apache.tinkerpop.gremlin.server.op.AbstractOpProcessor

manageTransactions

Constructor Summary

Constructors

Constructor and Description
TraversalOpProcessor()

Method Summary

Modifier and Type	Method and Description
protected void	beforeProcessing(Graph graph, Context ctx)
void	close()
protected Map<String,Object>	generateMetaData(ChannelHandlerContext ctx, RequestMessage msg, ResponseStatusCode code, Iterator itty) Generates meta-data to put on a ResponseMessage.
String	getName() The name of the processor which requests must refer to "processor" field on a request.
protected void	handleIterator(Context context, Iterator itty, Graph graph)
void	init(Settings settings) Initialize the OpProcessor with settings from the server.
protected void	iterateComplete(ChannelHandlerContext ctx, RequestMessage msg, Iterator itty) Called when iteration within AbstractOpProcessor.handleIterator(Context, Iterator) is on its final pass and the final frame is about to be sent back to the client.
protected void	onError(Graph graph, Context ctx)
protected void	onSideEffectSuccess(Graph graph, Context ctx)
protected void	onTraversalSuccess(Graph graph, Context ctx)
ThrowingConsumer<Context>	select(Context ctx) Given the context (which contains the RequestMessage), return back a Consumer function that will be executed with the context.

Methods inherited from class org.apache.tinkerpop.gremlin.server.op.AbstractOpProcessor

attemptCommit, attemptRollback, handleIterator, isForceFlushed, makeFrame, makeFrame

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

OP_PROCESSOR_NAME

public static final String OP_PROCESSOR_NAME

See Also:

Constant Field Values

traversalOpTimer

public static final Timer traversalOpTimer

DEFAULT_SETTINGS

public static final Settings.ProcessorSettings DEFAULT_SETTINGS

CONFIG_CACHE_EXPIRATION_TIME

public static final String CONFIG_CACHE_EXPIRATION_TIME

Configuration setting for how long a cached side-effect will be available before it is evicted from the cache.

See Also:

Constant Field Values

DEFAULT_CACHE_EXPIRATION_TIME

public static final long DEFAULT_CACHE_EXPIRATION_TIME

Default timeout for a cached side-effect is ten minutes.

See Also:

Constant Field Values

CONFIG_CACHE_MAX_SIZE

public static final String CONFIG_CACHE_MAX_SIZE

Configuration setting for the maximum number of entries the cache will have.

See Also:

Constant Field Values

DEFAULT_CACHE_MAX_SIZE

public static final long DEFAULT_CACHE_MAX_SIZE

Default size of the max size of the cache.

See Also:

Constant Field Values

cache

protected static <any> cache

Constructor Detail

TraversalOpProcessor

public TraversalOpProcessor()

Method Detail

getName

public String getName()

Description copied from interface: OpProcessor

The name of the processor which requests must refer to "processor" field on a request.

close

public void close()
           throws Exception

Throws:

Exception

init

public void init(Settings settings)

Description copied from interface: OpProcessor

Initialize the OpProcessor with settings from the server. This method should only be called once at server startup by a single thread.

select

public ThrowingConsumer<Context> select(Context ctx)
                                 throws OpProcessorException

Description copied from interface: OpProcessor

Given the context (which contains the RequestMessage), return back a Consumer function that will be executed with the context. A typical implementation will simply check the "op" field on the RequestMessage and return the Consumer function for that particular operation.

Throws:

OpProcessorException

iterateComplete

protected void iterateComplete(ChannelHandlerContext ctx,
                               RequestMessage msg,
                               Iterator itty)

Description copied from class: AbstractOpProcessor

Called when iteration within AbstractOpProcessor.handleIterator(Context, Iterator) is on its final pass and the final frame is about to be sent back to the client. This method only gets called on successful iteration of the entire result.

Overrides:

iterateComplete in class AbstractOpProcessor

beforeProcessing

protected void beforeProcessing(Graph graph,
                                Context ctx)

onError

protected void onError(Graph graph,
                       Context ctx)

onTraversalSuccess

protected void onTraversalSuccess(Graph graph,
                                  Context ctx)

onSideEffectSuccess

protected void onSideEffectSuccess(Graph graph,
                                   Context ctx)

generateMetaData

protected Map<String,Object> generateMetaData(ChannelHandlerContext ctx,
                                              RequestMessage msg,
                                              ResponseStatusCode code,
                                              Iterator itty)

Description copied from class: AbstractOpProcessor

Generates meta-data to put on a ResponseMessage.

Overrides:

generateMetaData in class AbstractOpProcessor

itty - a reference to the current Iterator of results - it is not meant to be forwarded in this method

handleIterator

protected void handleIterator(Context context,
                              Iterator itty,
                              Graph graph)
                       throws TimeoutException,
                              InterruptedException

Throws:

TimeoutException

InterruptedException