org.apache.flink.runtime.iterative.task

类 AbstractIterativeTask<S extends org.apache.flink.api.common.functions.Function,OT>

java.lang.Object

org.apache.flink.runtime.jobgraph.tasks.AbstractInvokable

org.apache.flink.runtime.operators.BatchTask<S,OT>

org.apache.flink.runtime.iterative.task.AbstractIterativeTask<S,OT>

所有已实现的接口:

Terminable, CheckpointableTask, CoordinatedTask, TaskInvokable, TaskContext<S,OT>

直接已知子类:

IterationHeadTask, IterationIntermediateTask, IterationTailTask

public abstract class AbstractIterativeTask<S extends org.apache.flink.api.common.functions.Function,OT>
extends BatchTask<S,OT>
implements Terminable

The abstract base class for all tasks able to participate in an iteration.

字段概要

字段

限定符和类型	字段和说明
protected boolean	isSolutionSetUpdate
protected boolean	isWorksetIteration
protected boolean	isWorksetUpdate
protected org.apache.flink.api.common.aggregators.LongSumAggregator	worksetAggregator
protected BlockingBackChannel	worksetBackChannel

从类继承的字段 org.apache.flink.runtime.operators.BatchTask

accumulatorMap, broadcastInputReaders, broadcastInputSerializers, chainedTasks, config, driver, eventualOutputs, inputComparators, inputIterators, inputReaders, inputs, inputSerializers, iterativeBroadcastInputs, iterativeInputs, localStrategies, LOG, output, resettableInputs, running, runtimeUdfContext, stub, tempBarriers

构造器概要

构造器

构造器和说明
AbstractIterativeTask(Environment environment) Create an Invokable task and set its environment.

方法概要

限定符和类型	方法和说明
String	brokerKey()
void	cancel() This method is called when a task is canceled either as a result of a user abort or an execution failure.
protected void	closeLocalStrategiesAndCaches()
DistributedRuntimeUDFContext	createRuntimeContext(org.apache.flink.metrics.groups.OperatorMetricGroup metrics)
protected org.apache.flink.util.Collector<OT>	createSolutionSetUpdateOutputCollector(org.apache.flink.util.Collector<OT> delegate) Creates a new solution set update output collector.
protected org.apache.flink.util.Collector<OT>	createWorksetUpdateOutputCollector()
protected org.apache.flink.util.Collector<OT>	createWorksetUpdateOutputCollector(org.apache.flink.util.Collector<OT> delegate) Creates a new WorksetUpdateOutputCollector.
protected int	currentIteration()
RuntimeAggregatorRegistry	getIterationAggregators()
protected void	incrementIterationCounter()
protected boolean	inFirstIteration()
protected void	initialize()
void	requestTermination()
void	run()
boolean	terminationRequested()
protected void	verifyEndOfSuperstepState()

从类继承的方法 org.apache.flink.runtime.operators.BatchTask

cancelChainedTasks, clearReaders, clearWriters, closeChainedTasks, closeUserCode, constructLogString, createInputIterator, excludeFromReset, formatLogString, getContainingTask, getDriverComparator, getInput, getInputSerializer, getIOManager, getLastOutputCollector, getLastTasksConfig, getMemoryManager, getMetricGroup, getNumTaskInputs, getOutputCollector, getOutputCollector, getStub, getTaskConfig, getTaskManagerInfo, initBroadcastInputReaders, initBroadcastInputsSerializers, initInputReaders, initInputsSerializersAndComparators, initLocalStrategies, initOutputs, initOutputs, initStub, instantiateUserCode, invoke, logAndThrowException, openChainedTasks, openUserCode, readAndSetBroadcastInput, releaseBroadcastVariables, resetAllInputs, setLastOutputCollector

从类继承的方法 org.apache.flink.runtime.jobgraph.tasks.AbstractInvokable

abortCheckpointOnBarrier, cleanUp, dispatchOperatorEvent, getCurrentNumberOfSubtasks, getEnvironment, getExecutionConfig, getIndexInSubtaskGroup, getJobConfiguration, getTaskConfiguration, getUserCodeClassLoader, isUsingNonBlockingInput, maybeInterruptOnCancel, notifyCheckpointAbortAsync, notifyCheckpointCompleteAsync, notifyCheckpointSubsumedAsync, restore, triggerCheckpointAsync, triggerCheckpointOnBarrier

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.apache.flink.runtime.operators.TaskContext

getExecutionConfig, getUserCodeClassLoader

字段详细资料

worksetAggregator

protected org.apache.flink.api.common.aggregators.LongSumAggregator worksetAggregator

worksetBackChannel

protected BlockingBackChannel worksetBackChannel

isWorksetIteration

protected boolean isWorksetIteration

isWorksetUpdate

protected boolean isWorksetUpdate

isSolutionSetUpdate

protected boolean isSolutionSetUpdate

构造器详细资料

AbstractIterativeTask

public AbstractIterativeTask(Environment environment)

Create an Invokable task and set its environment.

参数:

environment - The environment assigned to this invokable.

方法详细资料

initialize

protected void initialize()
                   throws Exception

覆盖:

initialize 在类中 BatchTask<S extends org.apache.flink.api.common.functions.Function,OT>

抛出:

Exception

run

public void run()
         throws Exception

覆盖:

run 在类中 BatchTask<S extends org.apache.flink.api.common.functions.Function,OT>

抛出:

Exception

closeLocalStrategiesAndCaches

protected void closeLocalStrategiesAndCaches()

覆盖:

closeLocalStrategiesAndCaches 在类中 BatchTask<S extends org.apache.flink.api.common.functions.Function,OT>

createRuntimeContext

public DistributedRuntimeUDFContext createRuntimeContext(org.apache.flink.metrics.groups.OperatorMetricGroup metrics)

覆盖:

createRuntimeContext 在类中 BatchTask<S extends org.apache.flink.api.common.functions.Function,OT>

inFirstIteration

protected boolean inFirstIteration()

currentIteration

protected int currentIteration()

incrementIterationCounter

protected void incrementIterationCounter()

brokerKey

public String brokerKey()

getIterationAggregators

public RuntimeAggregatorRegistry getIterationAggregators()

verifyEndOfSuperstepState

protected void verifyEndOfSuperstepState()
                                  throws IOException

抛出:

IOException

terminationRequested

public boolean terminationRequested()

指定者:

terminationRequested 在接口中 Terminable

requestTermination

public void requestTermination()

指定者:

requestTermination 在接口中 Terminable

cancel

public void cancel()
            throws Exception

从接口复制的说明: TaskInvokable

This method is called when a task is canceled either as a result of a user abort or an execution failure. It can be overwritten to respond to shut down the user code properly.

指定者:

cancel 在接口中 TaskInvokable

覆盖:

cancel 在类中 BatchTask<S extends org.apache.flink.api.common.functions.Function,OT>

抛出:

Exception

createWorksetUpdateOutputCollector

protected org.apache.flink.util.Collector<OT> createWorksetUpdateOutputCollector(org.apache.flink.util.Collector<OT> delegate)

Creates a new WorksetUpdateOutputCollector.

This collector is used by IterationIntermediateTask or IterationTailTask to update the workset.

If a non-null delegate is given, the new Collector will write to the solution set and also call collect(T) of the delegate.

参数:

delegate - null -OR- the delegate on which to call collect() by the newly created collector

返回:

a new WorksetUpdateOutputCollector

createWorksetUpdateOutputCollector

protected org.apache.flink.util.Collector<OT> createWorksetUpdateOutputCollector()

createSolutionSetUpdateOutputCollector

protected org.apache.flink.util.Collector<OT> createSolutionSetUpdateOutputCollector(org.apache.flink.util.Collector<OT> delegate)

Creates a new solution set update output collector.

This collector is used by IterationIntermediateTask or IterationTailTask to update the solution set of workset iterations. Depending on the task configuration, either a fast (non-probing) SolutionSetFastUpdateOutputCollector or normal (re-probing) SolutionSetUpdateOutputCollector is created.

If a non-null delegate is given, the new Collector will write back to the solution set and also call collect(T) of the delegate.

参数:

delegate - null -OR- a delegate collector to be called by the newly created collector

返回:

a new SolutionSetFastUpdateOutputCollector or SolutionSetUpdateOutputCollector