Package cascading.flow

Interface Summary

FlowCollector	Interface FlowCollector is the base "collector" interface used internally to pass Tuple instances between operations.
FlowElement	Interface FlowElement is a utility interface used internally to simplify DAG management.
FlowListener	Interface FlowListener provides hooks for receiving events on various stages of a Flow execution.
FlowSkipStrategy	Interface FlowSkipStrategy is used to create new strategies that decide when a Flow should be skipped when executed in a Cascade.

Class Summary

ElementGraph	Class ElementGraph represents the executable FlowElement graph.
ElementGraph.Extent
Flow	A Pipe assembly is connected to the necessary number of Tap sinks and sources into a Flow.
Flow.FlowHolder	Class FlowHolder is a helper class for wrapping Flow instances.
FlowConnector	Use the FlowConnector to link source and sink Tap instances with an assembly of Pipe instances into an executable Flow.
FlowMapper	Class FlowMapper is the Hadoop Mapper implementation.
FlowPlanner	Class FlowPlanner is the base class for all planner implementations.
FlowProcess	FlowProcess implementations provide a call-back interface into the current computing system.
FlowReducer	Class FlowReducer is the Hadoop Reducer implementation.
FlowSession	FlowSession implementations provide a call-back interface into the current flow management system, if any.
FlowSkipIfSinkExists	Class FlowSkipIfSinkExists is a FlowSkipStrategy implementation that returns true if the Flow sink exists, regardless if it is stale or not.
FlowSkipIfSinkStale	Class FlowSkipIfSinkStale is a FlowSkipStrategy implementation that returns true if the Flow sink exists and is stale in relation to the Flow sources.
FlowStep	Class FlowStep is an internal representation of a given Job to be executed on a remote cluster.
MapReduceFlow	Class MapReduceFlow is a Flow subclass that supports custom MapReduce jobs preconfigured via the JobConf object.
MapReduceFlowStep	Class MapReduceFlowStep wraps a JobConf and allows it to be executed as a Flow.
MultiMapReducePlanner	Class MultiMapReducePlanner is the core Hadoop MapReduce planner.
Scope	Class Scope is an internal representation of the linkages between operations.
StepGraph	Class StepGraph is an internal representation of FlowStep instances.

Enum Summary

Scope.Kind
StepCounters	Enum FlowCounters lists all counters

Exception Summary

ElementGraphException	Class ElementGraphException is thrown during rendering of a pipe assembly to the Cascading internal "graph" representation.
FlowException	FlowException instances are thrown on errors when executing a Flow.
PlannerException	Class PlannerException is thrown when a job planner fails.