org.springframework.data.redis.cache

Interface RedisCacheWriter

All Superinterfaces:

CacheStatisticsProvider

public interface RedisCacheWriter
extends CacheStatisticsProvider

RedisCacheWriter provides low level access to Redis commands (SET, SETNX, GET, EXPIRE,...) used for caching.
The RedisCacheWriter may be shared by multiple cache implementations and is responsible for writing / reading binary data to / from Redis. The implementation honors potential cache lock flags that might be set.

Since:

2.0

Author:

Christoph Strobl, Mark Paluch

Method Summary

Modifier and Type	Method and Description
void	clean(String name, byte[] pattern) Remove all keys following the given pattern.
void	clearStatistics(String name) Reset all statistics counters and gauges for this cache.
byte[]	get(String name, byte[] key) Get the binary value representation from Redis stored for the given key.
static RedisCacheWriter	lockingRedisCacheWriter(RedisConnectionFactory connectionFactory) Create new RedisCacheWriter with locking behavior.
static RedisCacheWriter	nonLockingRedisCacheWriter(RedisConnectionFactory connectionFactory) Create new RedisCacheWriter without locking behavior.
void	put(String name, byte[] key, byte[] value, Duration ttl) Write the given key/value pair to Redis an set the expiration time if defined.
byte[]	putIfAbsent(String name, byte[] key, byte[] value, Duration ttl) Write the given value to Redis if the key does not already exist.
void	remove(String name, byte[] key) Remove the given key from Redis.
RedisCacheWriter	withStatisticsCollector(CacheStatisticsCollector cacheStatisticsCollector) Obtain a RedisCacheWriter using the given CacheStatisticsCollector to collect metrics.

Methods inherited from interface org.springframework.data.redis.cache.CacheStatisticsProvider

getCacheStatistics

Method Detail

nonLockingRedisCacheWriter

static RedisCacheWriter nonLockingRedisCacheWriter(RedisConnectionFactory connectionFactory)

Create new RedisCacheWriter without locking behavior.

Parameters:

connectionFactory - must not be null.

Returns:

new instance of DefaultRedisCacheWriter.

lockingRedisCacheWriter

static RedisCacheWriter lockingRedisCacheWriter(RedisConnectionFactory connectionFactory)

Create new RedisCacheWriter with locking behavior.

Parameters:

connectionFactory - must not be null.

Returns:

new instance of DefaultRedisCacheWriter.

put

void put(String name,
         byte[] key,
         byte[] value,
         @Nullable
         Duration ttl)

Write the given key/value pair to Redis an set the expiration time if defined.

Parameters:

name - The cache name must not be null.

key - The key for the cache entry. Must not be null.

value - The value stored for the key. Must not be null.

ttl - Optional expiration time. Can be null.

get

@Nullable
byte[] get(String name,
                     byte[] key)

Get the binary value representation from Redis stored for the given key.

Parameters:

name - must not be null.

key - must not be null.

Returns:

null if key does not exist.

putIfAbsent

@Nullable
byte[] putIfAbsent(String name,
                             byte[] key,
                             byte[] value,
                             @Nullable
                             Duration ttl)

Write the given value to Redis if the key does not already exist.

Parameters:

name - The cache name must not be null.

key - The key for the cache entry. Must not be null.

value - The value stored for the key. Must not be null.

ttl - Optional expiration time. Can be null.

Returns:

null if the value has been written, the value stored for the key if it already exists.

remove

void remove(String name,
            byte[] key)

Remove the given key from Redis.

Parameters:

name - The cache name must not be null.

key - The key for the cache entry. Must not be null.

clean

void clean(String name,
           byte[] pattern)

Remove all keys following the given pattern.

Parameters:

name - The cache name must not be null.

pattern - The pattern for the keys to remove. Must not be null.

clearStatistics

void clearStatistics(String name)

Reset all statistics counters and gauges for this cache.

Since:

2.4

withStatisticsCollector

RedisCacheWriter withStatisticsCollector(CacheStatisticsCollector cacheStatisticsCollector)

Obtain a RedisCacheWriter using the given CacheStatisticsCollector to collect metrics.

Parameters:

cacheStatisticsCollector - must not be null.

Returns:

new instance of RedisCacheWriter.