org.apache.druid.client.cache

Class RedisClusterCache

java.lang.Object

org.apache.druid.client.cache.AbstractRedisCache

org.apache.druid.client.cache.RedisClusterCache

All Implemented Interfaces:

Closeable, AutoCloseable, Cache

public class RedisClusterCache
extends AbstractRedisCache

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.druid.client.cache.Cache

Cache.NamedKey

Method Summary

Modifier and Type	Method and Description
protected void	cleanup()
protected byte[]	getFromRedis(byte[] key)
protected Pair<Integer,Map<Cache.NamedKey,byte[]>>	mgetFromRedis(Iterable<Cache.NamedKey> keys) Jedis does not work if the given keys are distributed among different redis nodes A simple workaround is to group keys by their slots and mget values for each slot.
protected void	putToRedis(byte[] key, byte[] value, RedisCacheConfig.DurationConfig expiration)

Methods inherited from class org.apache.druid.client.cache.AbstractRedisCache

close, close, doMonitor, get, getBulk, getStats, isLocal, put

Methods inherited from class java.lang.Object

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

Method Detail

getFromRedis

protected byte[] getFromRedis(byte[] key)

Specified by:

getFromRedis in class AbstractRedisCache

putToRedis

protected void putToRedis(byte[] key,
                          byte[] value,
                          RedisCacheConfig.DurationConfig expiration)

Specified by:

putToRedis in class AbstractRedisCache

mgetFromRedis

protected Pair<Integer,Map<Cache.NamedKey,byte[]>> mgetFromRedis(Iterable<Cache.NamedKey> keys)

Jedis does not work if the given keys are distributed among different redis nodes A simple workaround is to group keys by their slots and mget values for each slot.

In future, Jedis could be replaced by the Lettuce driver which supports mget operation on a redis cluster

Specified by:

mgetFromRedis in class AbstractRedisCache

cleanup

protected void cleanup()

Specified by:

cleanup in class AbstractRedisCache