Package org.apache.iceberg.flink.maintenance.operator

Class LockRemover

java.lang.Object

org.apache.flink.streaming.api.operators.AbstractStreamOperator<Void>

org.apache.iceberg.flink.maintenance.operator.LockRemover

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.state.CheckpointListener, org.apache.flink.streaming.api.operators.Input<TaskResult>, org.apache.flink.streaming.api.operators.KeyContext, org.apache.flink.streaming.api.operators.KeyContextHandler, org.apache.flink.streaming.api.operators.OneInputStreamOperator<TaskResult,Void>, org.apache.flink.streaming.api.operators.StreamOperator<Void>, org.apache.flink.streaming.api.operators.StreamOperatorStateHandler.CheckpointedStreamOperator, org.apache.flink.streaming.api.operators.YieldingOperator<Void>

@Internal
public class LockRemover
extends org.apache.flink.streaming.api.operators.AbstractStreamOperator<Void>
implements org.apache.flink.streaming.api.operators.OneInputStreamOperator<TaskResult,Void>

Manages locks and collect Metric for the Maintenance Tasks.

The assumptions about the locks are the following:

• Every TaskResult is followed by a Watermark for normal Triggers
• For the Trigger.recovery(long) Watermark there is no element to process

When processing the inputs there are 3 possibilities:

• Normal execution - we receive a TaskResult and then a Watermark - unlocking the lock is handled by the processElement(StreamRecord)
• Recovery without ongoing execution (unlocking the recoveryLock) - we receive the Trigger.recovery(long) Watermark without any TaskResult - unlocking the TriggerLockFactory.createRecoveryLock() and a possible TriggerLockFactory.createLock() is handled by the processWatermark(Watermark) (the lastProcessedTaskStartEpoch is 0 in this case)
• Recovery with an ongoing execution - we receive a TaskResult and then a Watermark - unlocking the TriggerLockFactory.createLock() is handled by the processElement(StreamRecord), unlocking the TriggerLockFactory.createRecoveryLock() is handled by the processWatermark(Watermark) (the lastProcessedTaskStartEpoch is the start time of the old task)

See Also:

• Serialized Form

Field Summary

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

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

Constructor Summary

Constructors

Constructor	Description
LockRemover(String tableName, TriggerLockFactory lockFactory, List<String> maintenanceTaskNames)

Method Summary

Modifier and Type	Method	Description
void	open()
void	processElement(org.apache.flink.streaming.runtime.streamrecord.StreamRecord<TaskResult> streamRecord)
void	processWatermark(org.apache.flink.streaming.api.watermark.Watermark mark)

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

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

notifyCheckpointAborted, notifyCheckpointComplete

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.KeyContext

getCurrentKey, setCurrentKey

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

hasKeyContext

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, prepareSnapshotPreBarrier, setKeyContextElement1, setKeyContextElement2, snapshotState

Constructor Details

LockRemover

public LockRemover(String tableName,
 TriggerLockFactory lockFactory,
 List<String> maintenanceTaskNames)

Method Details

open

public void open()
          throws Exception

Specified by:

open in interface org.apache.flink.streaming.api.operators.StreamOperator<Void>

Overrides:

open in class org.apache.flink.streaming.api.operators.AbstractStreamOperator<Void>

Throws:

Exception

processElement

public void processElement(org.apache.flink.streaming.runtime.streamrecord.StreamRecord<TaskResult> streamRecord)

Specified by:

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

processWatermark

public void processWatermark(org.apache.flink.streaming.api.watermark.Watermark mark)

Specified by:

processWatermark in interface org.apache.flink.streaming.api.operators.Input<TaskResult>

Overrides:

processWatermark in class org.apache.flink.streaming.api.operators.AbstractStreamOperator<Void>