org.apache.flink.runtime.io.network.partition.hybrid

接口 HsDataView

所有已知子接口:

HsSubpartitionFileReader

所有已知实现类:

HsSubpartitionFileReaderImpl, HsSubpartitionMemoryDataManager

public interface HsDataView

A view for HsSubpartitionView to find out what data exists in memory or disk and polling the data.

方法概要

限定符和类型	方法和说明
Optional<ResultSubpartition.BufferAndBacklog>	consumeBuffer(int nextBufferToConsume) Try to consume next buffer.
int	getBacklog() Get the number of buffers backlog.
Buffer.DataType	peekNextToConsumeDataType(int nextBufferToConsume) Get dataType of next buffer to consume.
void	releaseDataView() Release this HsDataView when related subpartition view is releasing.

方法详细资料

consumeBuffer

Optional<ResultSubpartition.BufferAndBacklog> consumeBuffer(int nextBufferToConsume)
                                                     throws Throwable

Try to consume next buffer.

Only invoked by consumer thread.

参数:

nextBufferToConsume - next buffer index to consume.

返回:

If the target buffer does exist, return buffer and next buffer's backlog, otherwise return Optional.empty().

抛出:

Throwable

peekNextToConsumeDataType

Buffer.DataType peekNextToConsumeDataType(int nextBufferToConsume)

Get dataType of next buffer to consume.

参数:

nextBufferToConsume - next buffer index to consume

返回:

next buffer's dataType. If not found in memory, return Buffer.DataType.NONE.

getBacklog

int getBacklog()

Get the number of buffers backlog.

返回:

backlog of this view's corresponding subpartition.

releaseDataView

void releaseDataView()

Release this HsDataView when related subpartition view is releasing.