org.apache.flink.connector.file.src.reader

接口 StreamFormat.Reader<T>

所有超级接口:

AutoCloseable, Closeable

所有已知实现类:

TextLineInputFormat.Reader

封闭接口:

StreamFormat<T>

@PublicEvolving
public static interface StreamFormat.Reader<T>
extends Closeable

The actual reader that reads the records.

方法概要

限定符和类型	方法和说明
void	close() Closes the reader to release all resources.
default CheckpointedPosition	getCheckpointedPosition() Optionally returns the current position of the reader.
T	read() Reads the next record.

方法详细资料

read

@Nullable
T read()
          throws IOException

Reads the next record. Returns null when the input has reached its end.

抛出:

IOException

close

void close()
    throws IOException

Closes the reader to release all resources.

指定者:

close 在接口中 AutoCloseable

指定者:

close 在接口中 Closeable

抛出:

IOException

getCheckpointedPosition

@Nullable
default CheckpointedPosition getCheckpointedPosition()

Optionally returns the current position of the reader. This can be implemented by readers that want to speed up recovery from a checkpoint.

The current position of the reader is the position of the next record that will be returned in a call to read(). This can be implemented by readers that want to speed up recovery from a checkpoint.

See the top-level class comment (section "Checkpointing") for details.