org.apache.flink.connector.file.src.util

类 CheckpointedPosition

java.lang.Object

org.apache.flink.connector.file.src.util.CheckpointedPosition

所有已实现的接口:

Serializable

@PublicEvolving
public final class CheckpointedPosition
extends Object
implements Serializable

The position of a reader, to be stored in a checkpoint. The position consists of a record offset and a number of records to skip after that offset. The offset is optional, it may take the value NO_OFFSET, in which case only the records-to-skip count is used.

The combination of offset and records-to-skip makes it possible to represent the position of a wide variety of readers. In the simplest case, readers might store no offset and only store how many records they previously returned. On the other hand, readers that can precisely point to each record via a position can store that in the checkpoint. Readers that have occasional addressable positions (like sync markers, block starts, etc.) can store those together with the records skipped after the last marker.

另请参阅:

序列化表格

字段概要

字段

限定符和类型	字段和说明
static long	NO_OFFSET Constant for the offset, reflecting that the position does not contain any offset information.

构造器概要

构造器

构造器和说明
CheckpointedPosition(long offset, long recordsAfterOffset) Creates a new CheckpointedPosition for given offset and records-to-skip.

方法概要

限定符和类型	方法和说明
boolean	equals(Object o)
long	getOffset() Gets the offset that the reader will seek to when restored from this checkpoint.
long	getRecordsAfterOffset() Gets the records to skip after the offset.
int	hashCode()
String	toString()

从类继承的方法 java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

字段详细资料

NO_OFFSET

public static final long NO_OFFSET

Constant for the offset, reflecting that the position does not contain any offset information. It is used in positions that are defined only by a number of records to skip.

另请参阅:

常量字段值

构造器详细资料

CheckpointedPosition

public CheckpointedPosition(long offset,
                            long recordsAfterOffset)

Creates a new CheckpointedPosition for given offset and records-to-skip.

参数:

offset - The offset that the reader will seek to when restored from this checkpoint.

recordsAfterOffset - The records to skip after the offset.

方法详细资料

getOffset

public long getOffset()

Gets the offset that the reader will seek to when restored from this checkpoint.

getRecordsAfterOffset

public long getRecordsAfterOffset()

Gets the records to skip after the offset.

equals

public boolean equals(Object o)

覆盖:

equals 在类中 Object

hashCode

public int hashCode()

覆盖:

hashCode 在类中 Object

toString

public String toString()

覆盖:

toString 在类中 Object