org.apache.flink.runtime.state.filesystem

类 FileStateHandle

java.lang.Object

org.apache.flink.runtime.state.filesystem.FileStateHandle

所有已实现的接口:

Serializable, StateObject, StreamStateHandle

public class FileStateHandle
extends Object
implements StreamStateHandle

StreamStateHandle for state that was written to a file stream. The written data is identified by the file path. The state can be read again by calling openInputStream().

另请参阅:

序列化表格

构造器概要

构造器

构造器和说明
FileStateHandle(org.apache.flink.core.fs.Path filePath, long stateSize) Creates a new file state for the given file path.

方法概要

限定符和类型	方法和说明
void	discardState() Discard the state by deleting the file that stores the state.
boolean	equals(Object o)
org.apache.flink.core.fs.Path	getFilePath() Gets the path where this handle's state is stored.
long	getStateSize() Returns the file size in bytes.
int	hashCode()
org.apache.flink.core.fs.FSDataInputStream	openInputStream() Returns an FSDataInputStream that can be used to read back the data that was previously written to the stream.
String	toString()

从类继承的方法 java.lang.Object

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

构造器详细资料

FileStateHandle

public FileStateHandle(org.apache.flink.core.fs.Path filePath,
                       long stateSize)

Creates a new file state for the given file path.

参数:

filePath - The path to the file that stores the state.

方法详细资料

getFilePath

public org.apache.flink.core.fs.Path getFilePath()

Gets the path where this handle's state is stored.

返回:

The path where this handle's state is stored.

openInputStream

public org.apache.flink.core.fs.FSDataInputStream openInputStream()
                                                           throws IOException

从接口复制的说明: StreamStateHandle

Returns an FSDataInputStream that can be used to read back the data that was previously written to the stream.

指定者:

openInputStream 在接口中 StreamStateHandle

抛出:

IOException

discardState

public void discardState()
                  throws Exception

Discard the state by deleting the file that stores the state. If the parent directory of the state is empty after deleting the state file, it is also deleted.

指定者:

discardState 在接口中 StateObject

抛出:

Exception - Thrown, if the file deletion (not the directory deletion) fails.

getStateSize

public long getStateSize()

Returns the file size in bytes.

指定者:

getStateSize 在接口中 StateObject

返回:

The file size in bytes.

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