cascading.flow.hadoop.planner.rule.expression

Class BalanceNonSafePipeSplitExpression

java.lang.Object

cascading.flow.planner.rule.RuleExpression

cascading.flow.hadoop.planner.rule.expression.BalanceNonSafePipeSplitExpression

public class BalanceNonSafePipeSplitExpression
extends cascading.flow.planner.rule.RuleExpression

Captures a split against a non-safe Operation to prevent the operation from running in parallel mappers.

THis variant allows a non-safe operation to be followed by any Pipe. this assumes other rules enforce splitting to only be on Each or Pipe types.

Field Summary

Fields inherited from class cascading.flow.planner.rule.RuleExpression

contractedMatchExpression, contractionExpression, matchExpression

Constructor Summary

Constructors

Constructor and Description
BalanceNonSafePipeSplitExpression()

Method Summary

Methods inherited from class cascading.flow.planner.rule.RuleExpression

getContractedMatchExpression, getContractionExpression, getExpressionName, getMatchExpression

Methods inherited from class java.lang.Object

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

Constructor Detail

BalanceNonSafePipeSplitExpression

public BalanceNonSafePipeSplitExpression()