LazyBarrierStrategy (Apache TinkerPop 3.7.0-SNAPSHOT API)

java.lang.Object
- org.apache.tinkerpop.gremlin.process.traversal.strategy.AbstractTraversalStrategy<TraversalStrategy.OptimizationStrategy>
- - org.apache.tinkerpop.gremlin.process.traversal.strategy.optimization.LazyBarrierStrategy

All Implemented Interfaces:

Serializable, Comparable<Class<? extends TraversalStrategy>>, TraversalStrategy<TraversalStrategy.OptimizationStrategy>, TraversalStrategy.OptimizationStrategy
```
public final class LazyBarrierStrategy
extends AbstractTraversalStrategy<TraversalStrategy.OptimizationStrategy>
implements TraversalStrategy.OptimizationStrategy
```
LazyBarrierStrategy is an OLTP-only strategy that automatically inserts a NoOpBarrierStep after every FlatMapStep if neither path-tracking nor partial path-tracking is required, and the next step is not the traversal's last step or a Barrier. NoOpBarrierSteps allow traversers to be bulked, thus this strategy is meant to reduce memory requirements and improve the overall query performance.
Author:

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

See Also:

Serialized Form

Example:
```
 __.out().bothE().count()      // is replaced by __.out().barrier(2500).bothE().count()
 __.both().both().valueMap()   // is replaced by __.both().barrier(2500).both().barrier(2500).valueMap()
 
```

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 Description

static String BARRIER_COPY_LABELS

static String BARRIER_PLACEHOLDER

protected static int MAX_BARRIER_SIZE
- Fields inherited from interface org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy
  STRATEGY

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`apply(Traversal.Admin<?,?> traversal)`
`Set<Class<? extends TraversalStrategy.OptimizationStrategy>>`	`applyPrior()`	The set of strategies that must be executed before this strategy is executed.
`static LazyBarrierStrategy`	`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
applyPost, getConfiguration

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

- Field Detail
  - BARRIER_PLACEHOLDER
```
public static final String BARRIER_PLACEHOLDER
```
  - BARRIER_COPY_LABELS
```
public static final String BARRIER_COPY_LABELS
```
  - 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>
  - applyPrior
```
public Set<Class<? extends TraversalStrategy.OptimizationStrategy>> applyPrior()
```
    Description copied from interface: TraversalStrategy
    
    The set of strategies that must be executed before this strategy is executed. If there are no ordering requirements, the default implementation returns an empty set.
    
    Specified by:
    
    applyPrior in interface TraversalStrategy<TraversalStrategy.OptimizationStrategy>
    
    Returns:
    
    the set of strategies that must be executed prior to this one.
  - instance
```
public static LazyBarrierStrategy instance()
```