io.ray.streaming.runtime.context.impl

Class MemoryContextBackend

java.lang.Object

io.ray.streaming.runtime.context.impl.MemoryContextBackend

All Implemented Interfaces:

ContextBackend

public class MemoryContextBackend
extends Object
implements ContextBackend

This context backend uses memory and doesn't supports failover. Data will be lost after worker died.

Constructor Summary

Constructors

Constructor and Description
MemoryContextBackend(ContextBackendConfig config)

Method Summary

Modifier and Type	Method and Description
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

Methods inherited from class java.lang.Object

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

Constructor Detail

MemoryContextBackend

public MemoryContextBackend(ContextBackendConfig config)

Method Detail

exists

public boolean exists(String key)

Description copied from interface: ContextBackend

check if key exists in state

Specified by:

exists in interface ContextBackend

Returns:

true if exists

get

public byte[] get(String key)

Description copied from interface: ContextBackend

get content by key

Specified by:

get in interface ContextBackend

Parameters:

key - key

Returns:

the StateBackend

put

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

Description copied from interface: ContextBackend

put content by key

Specified by:

put in interface ContextBackend

Parameters:

key - key

value - content

remove

public void remove(String key)

Description copied from interface: ContextBackend

remove content by key

Specified by:

remove in interface ContextBackend

Parameters:

key - key