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

接口 HsSubpartitionFileReader

所有超级接口:

Comparable<HsSubpartitionFileReader>, HsDataView

所有已知实现类:

HsSubpartitionFileReaderImpl

public interface HsSubpartitionFileReader
extends Comparable<HsSubpartitionFileReader>, HsDataView

This component is responsible for reading data from disk for a specific subpartition.

In order to access the disk as sequentially as possible HsSubpartitionFileReader need to be able to compare priorities.

嵌套类概要

嵌套类

限定符和类型	接口和说明
static interface	HsSubpartitionFileReader.Factory Factory to create HsSubpartitionFileReader.

方法概要

限定符和类型	方法和说明
void	fail(Throwable failureCause) Fail this HsSubpartitionFileReader caused by failureCause.
void	prepareForScheduling() Do prep work before this HsSubpartitionFileReader is scheduled to read data.
void	readBuffers(Queue<org.apache.flink.core.memory.MemorySegment> buffers, BufferRecycler recycler) Read data from disk.

从接口继承的方法 java.lang.Comparable

compareTo

从接口继承的方法 org.apache.flink.runtime.io.network.partition.hybrid.HsDataView

consumeBuffer, getBacklog, peekNextToConsumeDataType, releaseDataView

方法详细资料

prepareForScheduling

void prepareForScheduling()

Do prep work before this HsSubpartitionFileReader is scheduled to read data.

readBuffers

void readBuffers(Queue<org.apache.flink.core.memory.MemorySegment> buffers,
                 BufferRecycler recycler)
          throws IOException

Read data from disk.

参数:

buffers - for reading, note that the ownership of the buffer taken out from the queue is transferred to this class, and the unused buffer must be returned.

recycler - to return buffer to read buffer pool.

抛出:

IOException

fail

void fail(Throwable failureCause)

Fail this HsSubpartitionFileReader caused by failureCause.

参数:

failureCause - represents the reason why it failed.