public class CompactOperator<T> extends AbstractStreamOperator<PartitionCommitInfo> implements OneInputStreamOperator<CompactMessages.CoordinatorOutput,PartitionCommitInfo>, BoundedOneInput
Use BulkFormat to read and use BucketWriter to write.
STATE: This operator stores expired files in state, after the checkpoint completes successfully, We can ensure that these files will not be used again and they can be deleted from the file system.
| Modifier and Type | Field and Description |
|---|---|
static String |
COMPACTED_PREFIX |
static String |
UNCOMPACTED_PREFIX |
chainingStrategy, config, latencyStats, LOG, metrics, output, processingTimeService| Constructor and Description |
|---|
CompactOperator(SupplierWithException<FileSystem,IOException> fsFactory,
CompactReader.Factory<T> readerFactory,
CompactWriter.Factory<T> writerFactory) |
| Modifier and Type | Method and Description |
|---|---|
static Path |
convertFromUncompacted(Path path) |
static String |
convertToUncompacted(String path) |
void |
endInput()
It is notified that no more data will arrive on the input.
|
void |
initializeState(StateInitializationContext context)
Stream operators with state which can be restored need to override this hook method.
|
void |
notifyCheckpointComplete(long checkpointId)
Notifies the listener that the checkpoint with the given
checkpointId completed and
was committed. |
void |
processElement(StreamRecord<CompactMessages.CoordinatorOutput> element)
Processes one element that arrived on this input of the
MultipleInputStreamOperator. |
void |
snapshotState(StateSnapshotContext context)
Stream operators with state, which want to participate in a snapshot need to override this
hook method.
|
close, dispose, getChainingStrategy, getContainingTask, getCurrentKey, getExecutionConfig, getInternalTimerService, getKeyedStateBackend, getKeyedStateStore, getMetricGroup, getOperatorConfig, getOperatorID, getOperatorName, getOperatorStateBackend, getOrCreateKeyedState, getPartitionedState, getPartitionedState, getProcessingTimeService, getRuntimeContext, getTimeServiceManager, getUserCodeClassloader, initializeState, isUsingCustomRawKeyedState, notifyCheckpointAborted, open, prepareSnapshotPreBarrier, processLatencyMarker, processLatencyMarker1, processLatencyMarker2, processWatermark, processWatermark1, processWatermark2, reportOrForwardLatencyMarker, setChainingStrategy, setCurrentKey, setKeyContextElement1, setKeyContextElement2, setProcessingTimeService, setup, snapshotStateclone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitsetKeyContextElementclose, dispose, getMetricGroup, getOperatorID, initializeState, open, prepareSnapshotPreBarrier, setKeyContextElement1, setKeyContextElement2, snapshotStatenotifyCheckpointAbortedgetCurrentKey, setCurrentKeyprocessLatencyMarker, processWatermarkpublic static final String UNCOMPACTED_PREFIX
public static final String COMPACTED_PREFIX
public CompactOperator(SupplierWithException<FileSystem,IOException> fsFactory, CompactReader.Factory<T> readerFactory, CompactWriter.Factory<T> writerFactory)
public void initializeState(StateInitializationContext context) throws Exception
AbstractStreamOperatorinitializeState in interface StreamOperatorStateHandler.CheckpointedStreamOperatorinitializeState in class AbstractStreamOperator<PartitionCommitInfo>context - context that allows to register different states.Exceptionpublic void processElement(StreamRecord<CompactMessages.CoordinatorOutput> element) throws Exception
InputMultipleInputStreamOperator.
This method is guaranteed to not be called concurrently with other methods of the operator.processElement in interface Input<CompactMessages.CoordinatorOutput>Exceptionpublic void snapshotState(StateSnapshotContext context) throws Exception
AbstractStreamOperatorsnapshotState in interface StreamOperatorStateHandler.CheckpointedStreamOperatorsnapshotState in class AbstractStreamOperator<PartitionCommitInfo>context - context that provides information and means required for taking a snapshotExceptionpublic void notifyCheckpointComplete(long checkpointId)
throws Exception
CheckpointListenercheckpointId completed and
was committed.
These notifications are "best effort", meaning they can sometimes be skipped. To behave
properly, implementers need to follow the "Checkpoint Subsuming Contract". Please see the
class-level JavaDocs for details.
Please note that checkpoints may generally overlap, so you cannot assume that the notifyCheckpointComplete() call is always for the latest prior checkpoint (or snapshot) that
was taken on the function/operator implementing this interface. It might be for a checkpoint
that was triggered earlier. Implementing the "Checkpoint Subsuming Contract" (see above)
properly handles this situation correctly as well.
Please note that throwing exceptions from this method will not cause the completed checkpoint to be revoked. Throwing exceptions will typically cause task/job failure and trigger recovery.
notifyCheckpointComplete in interface CheckpointListenernotifyCheckpointComplete in class AbstractStreamOperator<PartitionCommitInfo>checkpointId - The ID of the checkpoint that has been completed.Exception - This method can propagate exceptions, which leads to a failure/recovery for
the task. Not that this will NOT lead to the checkpoint being revoked.public void endInput()
throws Exception
BoundedOneInputendInput in interface BoundedOneInputExceptionCopyright © 2014–2021 The Apache Software Foundation. All rights reserved.