Package org.apache.wayang.flink.channels

Class DataSetChannel

java.lang.Object

org.apache.wayang.core.plan.executionplan.Channel

org.apache.wayang.flink.channels.DataSetChannel

public class DataSetChannel
extends Channel

Describes the situation where one DataSet is operated on, producing a further DataSet.

NB: We might be more specific: Distinguish between cached/uncached and pipelined/aggregated.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	DataSetChannel.Instance	ChannelInstance implementation for DataSets.

Field Summary

Fields

Modifier and Type	Field	Description
static ChannelDescriptor	DESCRIPTOR
static ChannelDescriptor	DESCRIPTOR_MANY

Fields inherited from class org.apache.wayang.core.plan.executionplan.Channel

logger

Constructor Summary

Constructors

Constructor	Description
DataSetChannel(ChannelDescriptor descriptor, OutputSlot<?> outputSlot)

Method Summary

Modifier and Type	Method	Description
Channel	copy()	Create a copy of this instance.
DataSetChannel.Instance	createInstance(Executor executor, OptimizationContext.OperatorContext producerOperatorContext, int producerOutputIndex)	Create a ChannelInstance for this instance.

Methods inherited from class org.apache.wayang.core.plan.executionplan.Channel

addConsumer, addSibling, getCardinalityEstimate, getConsumers, getCorrespondingSlots, getDataSetType, getDescriptor, getOriginal, getProducer, getProducerOperator, getProducerSlot, getSiblings, isBetweenStages, isCopy, isExecutionBreaker, isMarkedForInstrumentation, isReusable, isSuitableForBreakpoint, markForInstrumentation, mergeIntoOriginal, removeSiblings, removeSiblingsWhere, retain, toString, withSiblings

Methods inherited from class java.lang.Object

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

Field Detail

DESCRIPTOR

public static final ChannelDescriptor DESCRIPTOR

DESCRIPTOR_MANY

public static final ChannelDescriptor DESCRIPTOR_MANY

Constructor Detail

DataSetChannel

public DataSetChannel(ChannelDescriptor descriptor,
                      OutputSlot<?> outputSlot)

Method Detail

copy

public Channel copy()

Description copied from class: Channel

Create a copy of this instance. Mimics everything apart from the consumers. Also delimits already executed ExecutionTasks and those that are not executed yet. Be careful when revising this invariant.

Specified by:

copy in class Channel

createInstance

public DataSetChannel.Instance createInstance(Executor executor,
                                              OptimizationContext.OperatorContext producerOperatorContext,
                                              int producerOutputIndex)

Description copied from class: Channel

Create a ChannelInstance for this instance.

Specified by:

createInstance in class Channel

Parameters:

executor - that manages the resource or null if none