org.apache.beam.runners.flink.translation.functions

Class ImpulseSourceFunction

java.lang.Object

org.apache.beam.runners.flink.translation.functions.ImpulseSourceFunction

All Implemented Interfaces:

java.io.Serializable, org.apache.flink.api.common.functions.Function, org.apache.flink.streaming.api.checkpoint.CheckpointedFunction, org.apache.flink.streaming.api.functions.source.SourceFunction<org.apache.beam.sdk.util.WindowedValue<byte[]>>

public class ImpulseSourceFunction
extends java.lang.Object
implements org.apache.flink.streaming.api.functions.source.SourceFunction<org.apache.beam.sdk.util.WindowedValue<byte[]>>, org.apache.flink.streaming.api.checkpoint.CheckpointedFunction

Source function which sends a single global impulse to a downstream operator. It may keep the source alive although its work is already done. It will only shutdown when the streaming job is cancelled.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.flink.streaming.api.functions.source.SourceFunction

org.apache.flink.streaming.api.functions.source.SourceFunction.SourceContext<T>

Constructor Summary

Constructors

Constructor and Description
ImpulseSourceFunction(long idleTimeoutMs)

Method Summary

Modifier and Type	Method and Description
void	cancel()
void	initializeState(org.apache.flink.runtime.state.FunctionInitializationContext context)
void	run(org.apache.flink.streaming.api.functions.source.SourceFunction.SourceContext<org.apache.beam.sdk.util.WindowedValue<byte[]>> sourceContext)
void	snapshotState(org.apache.flink.runtime.state.FunctionSnapshotContext context)

Methods inherited from class java.lang.Object

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

Constructor Detail

ImpulseSourceFunction

public ImpulseSourceFunction(long idleTimeoutMs)

Method Detail

run

public void run(org.apache.flink.streaming.api.functions.source.SourceFunction.SourceContext<org.apache.beam.sdk.util.WindowedValue<byte[]>> sourceContext)
         throws java.lang.Exception

Specified by:

run in interface org.apache.flink.streaming.api.functions.source.SourceFunction<org.apache.beam.sdk.util.WindowedValue<byte[]>>

Throws:

java.lang.Exception

cancel

public void cancel()

Specified by:

cancel in interface org.apache.flink.streaming.api.functions.source.SourceFunction<org.apache.beam.sdk.util.WindowedValue<byte[]>>

snapshotState

public void snapshotState(org.apache.flink.runtime.state.FunctionSnapshotContext context)

Specified by:

snapshotState in interface org.apache.flink.streaming.api.checkpoint.CheckpointedFunction

initializeState

public void initializeState(org.apache.flink.runtime.state.FunctionInitializationContext context)
                     throws java.lang.Exception

Specified by:

initializeState in interface org.apache.flink.streaming.api.checkpoint.CheckpointedFunction

Throws:

java.lang.Exception