io.ray.streaming.runtime.context.impl

类 LocalFileContextBackend

java.lang.Object

io.ray.streaming.runtime.context.impl.LocalFileContextBackend

所有已实现的接口:

ContextBackend

直接已知子类:

AtomicFsBackend

public class LocalFileContextBackend
extends Object
implements ContextBackend

This context backend uses local file system and doesn't supports failover in cluster. But it supports failover in single node. This is a pure file system backend which doesn't support atomic writing, please don't use this class, instead, use AtomicFsBackend which extends this class.

构造器概要

构造器

构造器和说明
LocalFileContextBackend(ContextBackendConfig config)

方法概要

限定符和类型	方法和说明
boolean	exists(String key) check if key exists in state
byte[]	get(String key) get content by key
void	put(String key, byte[] value) put content by key
void	remove(String key) remove content by key
protected void	rename(String fromKey, String toKey)

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

LocalFileContextBackend

public LocalFileContextBackend(ContextBackendConfig config)

方法详细资料

exists

public boolean exists(String key)

从接口复制的说明: ContextBackend

check if key exists in state

指定者:

exists 在接口中 ContextBackend

返回:

true if exists

get

public byte[] get(String key)
           throws Exception

从接口复制的说明: ContextBackend

get content by key

指定者:

get 在接口中 ContextBackend

参数:

key - key

返回:

the StateBackend

抛出:

Exception

put

public void put(String key,
                byte[] value)
         throws Exception

从接口复制的说明: ContextBackend

put content by key

指定者:

put 在接口中 ContextBackend

参数:

key - key

value - content

抛出:

Exception

remove

public void remove(String key)

从接口复制的说明: ContextBackend

remove content by key

指定者:

remove 在接口中 ContextBackend

参数:

key - key

rename

protected void rename(String fromKey,
                      String toKey)
               throws Exception

抛出:

Exception