org.apache.flink.connector.file.table.stream.compact

Class CompactCoordinator

java.lang.Object

org.apache.flink.streaming.api.operators.AbstractStreamOperator<CompactMessages.CoordinatorOutput>

org.apache.flink.connector.file.table.stream.compact.CompactCoordinator

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.state.CheckpointListener, org.apache.flink.streaming.api.operators.Input<CompactMessages.CoordinatorInput>, org.apache.flink.streaming.api.operators.KeyContext, org.apache.flink.streaming.api.operators.KeyContextHandler, org.apache.flink.streaming.api.operators.OneInputStreamOperator<CompactMessages.CoordinatorInput,CompactMessages.CoordinatorOutput>, org.apache.flink.streaming.api.operators.SetupableStreamOperator<CompactMessages.CoordinatorOutput>, org.apache.flink.streaming.api.operators.StreamOperator<CompactMessages.CoordinatorOutput>, org.apache.flink.streaming.api.operators.StreamOperatorStateHandler.CheckpointedStreamOperator, org.apache.flink.streaming.api.operators.YieldingOperator<CompactMessages.CoordinatorOutput>

@Internal
public class CompactCoordinator
extends org.apache.flink.streaming.api.operators.AbstractStreamOperator<CompactMessages.CoordinatorOutput>
implements org.apache.flink.streaming.api.operators.OneInputStreamOperator<CompactMessages.CoordinatorInput,CompactMessages.CoordinatorOutput>

This is the single (non-parallel) monitoring task which coordinate input files to compaction units. - Receives in-flight input files inside checkpoint. - Receives all upstream end input messages after the checkpoint completes successfully, starts coordination.

CompactMessages.CompactionUnit and CompactMessages.EndCompaction must be sent to the downstream in an orderly manner, while CompactMessages.EndCompaction is broadcast emitting, so unit and endCompaction use the broadcast emitting mechanism together. Since unit is broadcast, we want it to be processed by a single task, so we carry the ID in the unit and let the downstream task select its own unit.

NOTE: The coordination is a stable algorithm, which can ensure that the downstream can perform compaction at any time without worrying about fail over.

STATE: This operator stores input files in state, after the checkpoint completes successfully, input files are taken out from the state for coordination.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.flink.streaming.api.operators.AbstractStreamOperator

chainingStrategy, config, lastRecordAttributes1, lastRecordAttributes2, latencyStats, metrics, output, processingTimeService, stateHandler, stateKeySelector1, stateKeySelector2, timeServiceManager

Constructor Summary

Constructors

Constructor and Description
CompactCoordinator(org.apache.flink.util.function.SupplierWithException<org.apache.flink.core.fs.FileSystem,IOException> fsFactory, long targetFileSize)

Method Summary

Modifier and Type	Method and Description
void	initializeState(org.apache.flink.runtime.state.StateInitializationContext context)
void	processElement(org.apache.flink.streaming.runtime.streamrecord.StreamRecord<CompactMessages.CoordinatorInput> element)
void	snapshotState(org.apache.flink.runtime.state.StateSnapshotContext context)

Methods inherited from class org.apache.flink.streaming.api.operators.AbstractStreamOperator

close, finish, getChainingStrategy, getContainingTask, getCurrentKey, getExecutionConfig, getInternalTimerService, getKeyedStateBackend, getKeyedStateStore, getMetricGroup, getOperatorConfig, getOperatorID, getOperatorName, getOperatorStateBackend, getOrCreateKeyedState, getPartitionedState, getPartitionedState, getProcessingTimeService, getRuntimeContext, getStateKeySelector1, getStateKeySelector2, getTimeServiceManager, getUserCodeClassloader, hasKeyContext1, hasKeyContext2, initializeState, isUsingCustomRawKeyedState, notifyCheckpointAborted, notifyCheckpointComplete, open, prepareSnapshotPreBarrier, processLatencyMarker, processLatencyMarker1, processLatencyMarker2, processRecordAttributes, processRecordAttributes1, processRecordAttributes2, processWatermark, processWatermark1, processWatermark2, processWatermarkStatus, processWatermarkStatus1, processWatermarkStatus2, reportOrForwardLatencyMarker, setChainingStrategy, setCurrentKey, setKeyContextElement1, setKeyContextElement2, setMailboxExecutor, setProcessingTimeService, setup, snapshotState, useSplittableTimers

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.flink.streaming.api.operators.OneInputStreamOperator

setKeyContextElement

Methods inherited from interface org.apache.flink.streaming.api.operators.StreamOperator

close, finish, getMetricGroup, getOperatorAttributes, getOperatorID, initializeState, open, prepareSnapshotPreBarrier, setKeyContextElement1, setKeyContextElement2, snapshotState

Methods inherited from interface org.apache.flink.api.common.state.CheckpointListener

notifyCheckpointAborted, notifyCheckpointComplete

Methods inherited from interface org.apache.flink.streaming.api.operators.KeyContext

getCurrentKey, setCurrentKey

Methods inherited from interface org.apache.flink.streaming.api.operators.Input

processLatencyMarker, processRecordAttributes, processWatermark, processWatermarkStatus

Methods inherited from interface org.apache.flink.streaming.api.operators.KeyContextHandler

hasKeyContext

Constructor Detail

CompactCoordinator

public CompactCoordinator(org.apache.flink.util.function.SupplierWithException<org.apache.flink.core.fs.FileSystem,IOException> fsFactory,
                          long targetFileSize)

Method Detail

initializeState

public void initializeState(org.apache.flink.runtime.state.StateInitializationContext context)
                     throws Exception

Specified by:

initializeState in interface org.apache.flink.streaming.api.operators.StreamOperatorStateHandler.CheckpointedStreamOperator

Overrides:

initializeState in class org.apache.flink.streaming.api.operators.AbstractStreamOperator<CompactMessages.CoordinatorOutput>

Throws:

Exception

processElement

public void processElement(org.apache.flink.streaming.runtime.streamrecord.StreamRecord<CompactMessages.CoordinatorInput> element)
                    throws Exception

Specified by:

processElement in interface org.apache.flink.streaming.api.operators.Input<CompactMessages.CoordinatorInput>

Throws:

Exception

snapshotState

public void snapshotState(org.apache.flink.runtime.state.StateSnapshotContext context)
                   throws Exception

Specified by:

snapshotState in interface org.apache.flink.streaming.api.operators.StreamOperatorStateHandler.CheckpointedStreamOperator

Overrides:

snapshotState in class org.apache.flink.streaming.api.operators.AbstractStreamOperator<CompactMessages.CoordinatorOutput>

Throws:

Exception