org.apache.tinkerpop.gremlin.process.traversal.strategy.optimization

Class RepeatUnrollStrategy

java.lang.Object

org.apache.tinkerpop.gremlin.process.traversal.strategy.AbstractTraversalStrategy<TraversalStrategy.OptimizationStrategy>

org.apache.tinkerpop.gremlin.process.traversal.strategy.optimization.RepeatUnrollStrategy

All Implemented Interfaces:

Serializable, Comparable<Class<? extends TraversalStrategy>>, TraversalStrategy<TraversalStrategy.OptimizationStrategy>, TraversalStrategy.OptimizationStrategy

public final class RepeatUnrollStrategy
extends AbstractTraversalStrategy<TraversalStrategy.OptimizationStrategy>
implements TraversalStrategy.OptimizationStrategy

RepeatUnrollStrategy is an OLTP-only strategy that unrolls any RepeatStep if it uses a constant number of loops (times(x)) and doesn't emit intermittent elements. If any of the following 3 steps appears within the repeat-traversal, the strategy will not be applied:

• DedupGlobalStep
• LoopsStep
• LambdaHolder

Author:

Marko A. Rodriguez (http://markorodriguez.com)

See Also:

Serialized Form

Example:

     __.repeat(out()).times(2)   // is replaced by __.out().barrier(2500).out().barrier(2500)
 

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy

TraversalStrategy.DecorationStrategy, TraversalStrategy.FinalizationStrategy, TraversalStrategy.OptimizationStrategy, TraversalStrategy.ProviderOptimizationStrategy, TraversalStrategy.VerificationStrategy

Field Summary

Fields

Modifier and Type	Field and Description
protected static int	MAX_BARRIER_SIZE

Fields inherited from interface org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy

STRATEGY

Method Summary

Modifier and Type	Method and Description
void	apply(Traversal.Admin<?,?> traversal)
static RepeatUnrollStrategy	instance()

Methods inherited from class org.apache.tinkerpop.gremlin.process.traversal.strategy.AbstractTraversalStrategy

equals, hashCode, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy.OptimizationStrategy

compareTo, getTraversalCategory

Methods inherited from interface org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy

applyPost, applyPrior, getConfiguration

Field Detail

MAX_BARRIER_SIZE

protected static final int MAX_BARRIER_SIZE

See Also:

Constant Field Values

Method Detail

apply

public void apply(Traversal.Admin<?,?> traversal)

Specified by:

apply in interface TraversalStrategy<TraversalStrategy.OptimizationStrategy>

instance

public static RepeatUnrollStrategy instance()