org.apache.flink.connector.base.source.hybrid

类 HybridSourceSplitEnumerator

java.lang.Object

org.apache.flink.connector.base.source.hybrid.HybridSourceSplitEnumerator

所有已实现的接口:

AutoCloseable, org.apache.flink.api.common.state.CheckpointListener, org.apache.flink.api.connector.source.SplitEnumerator<HybridSourceSplit,HybridSourceEnumeratorState>

public class HybridSourceSplitEnumerator
extends Object
implements org.apache.flink.api.connector.source.SplitEnumerator<HybridSourceSplit,HybridSourceEnumeratorState>

Wraps the actual split enumerators and facilitates source switching. Enumerators are created lazily when source switch occurs to support runtime position conversion.

This enumerator delegates to the current underlying split enumerator and transitions to the next source once all readers have indicated via SourceReaderFinishedEvent that all input was consumed.

Switching between enumerators occurs by creating the new enumerator via Source.createEnumerator(SplitEnumeratorContext). The start position can be fixed at pipeline construction time through the source or supplied at switch time through a converter function by using the end state of the previous enumerator.

During subtask recovery, splits that have been assigned since the last checkpoint will be added back by the source coordinator. These splits may originate from a previous enumerator that is no longer active. In that case HybridSourceSplitEnumerator will suspend forwarding to the current enumerator and replay the returned splits by activating the previous readers. After returned splits were processed, delegation to the current underlying enumerator resumes.

构造器概要

构造器

构造器和说明
HybridSourceSplitEnumerator(org.apache.flink.api.connector.source.SplitEnumeratorContext<HybridSourceSplit> context, List<org.apache.flink.connector.base.source.hybrid.HybridSource.SourceListEntry> sources, int initialSourceIndex, HybridSourceEnumeratorState restoredEnumeratorState)

方法概要

限定符和类型	方法和说明
void	addReader(int subtaskId)
void	addSplitsBack(List<HybridSourceSplit> splits, int subtaskId)
void	close()
void	handleSourceEvent(int subtaskId, org.apache.flink.api.connector.source.SourceEvent sourceEvent)
void	handleSplitRequest(int subtaskId, String requesterHostname)
void	notifyCheckpointAborted(long checkpointId)
void	notifyCheckpointComplete(long checkpointId)
HybridSourceEnumeratorState	snapshotState(long checkpointId)
void	start()

从类继承的方法 java.lang.Object

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

构造器详细资料

HybridSourceSplitEnumerator

public HybridSourceSplitEnumerator(org.apache.flink.api.connector.source.SplitEnumeratorContext<HybridSourceSplit> context,
                                   List<org.apache.flink.connector.base.source.hybrid.HybridSource.SourceListEntry> sources,
                                   int initialSourceIndex,
                                   HybridSourceEnumeratorState restoredEnumeratorState)

方法详细资料

start

public void start()

指定者:

start 在接口中 org.apache.flink.api.connector.source.SplitEnumerator<HybridSourceSplit,HybridSourceEnumeratorState>

handleSplitRequest

public void handleSplitRequest(int subtaskId,
                               String requesterHostname)

指定者:

handleSplitRequest 在接口中 org.apache.flink.api.connector.source.SplitEnumerator<HybridSourceSplit,HybridSourceEnumeratorState>

addSplitsBack

public void addSplitsBack(List<HybridSourceSplit> splits,
                          int subtaskId)

指定者:

addSplitsBack 在接口中 org.apache.flink.api.connector.source.SplitEnumerator<HybridSourceSplit,HybridSourceEnumeratorState>

addReader

public void addReader(int subtaskId)

指定者:

addReader 在接口中 org.apache.flink.api.connector.source.SplitEnumerator<HybridSourceSplit,HybridSourceEnumeratorState>

snapshotState

public HybridSourceEnumeratorState snapshotState(long checkpointId)
                                          throws Exception

指定者:

snapshotState 在接口中 org.apache.flink.api.connector.source.SplitEnumerator<HybridSourceSplit,HybridSourceEnumeratorState>

抛出:

Exception

notifyCheckpointComplete

public void notifyCheckpointComplete(long checkpointId)
                              throws Exception

指定者:

notifyCheckpointComplete 在接口中 org.apache.flink.api.common.state.CheckpointListener

指定者:

notifyCheckpointComplete 在接口中 org.apache.flink.api.connector.source.SplitEnumerator<HybridSourceSplit,HybridSourceEnumeratorState>

抛出:

Exception

notifyCheckpointAborted

public void notifyCheckpointAborted(long checkpointId)
                             throws Exception

指定者:

notifyCheckpointAborted 在接口中 org.apache.flink.api.common.state.CheckpointListener

抛出:

Exception

handleSourceEvent

public void handleSourceEvent(int subtaskId,
                              org.apache.flink.api.connector.source.SourceEvent sourceEvent)

指定者:

handleSourceEvent 在接口中 org.apache.flink.api.connector.source.SplitEnumerator<HybridSourceSplit,HybridSourceEnumeratorState>

close

public void close()
           throws IOException

指定者:

close 在接口中 AutoCloseable

指定者:

close 在接口中 org.apache.flink.api.connector.source.SplitEnumerator<HybridSourceSplit,HybridSourceEnumeratorState>

抛出:

IOException