Storage

MicroStream's storage can be used as a backing store for the cache. It functions as a CacheWriter as well as a CacheReader, depending on the writeThrough and readThrough configuration. Per default it is used for both.

EmbeddedStorageManager storageManager = EmbeddedStorage.start();
CachingProvider provider = Caching.getCachingProvider();
CacheManager cacheManager = provider.getCacheManager();
CacheConfiguration<Integer, String> configuration = CacheConfiguration
.Builder(Integer.class, String.class, "my-cache", storageManager)
.build();
Cache<Integer, String> cache = cacheManager.createCache("jCache", configuration);

If you prefer an external configuration, you can link the storage configuration:

cache-config.properties
microstream-storage.properties
cache-config.properties
keyType = java.lang.Integer
valueType = java.lang.String
readThrough = true
writeThrough = true
storageConfigurationResourceName = microstream-storage.properties
microstream-storage.properties
baseDirectory = ~/cache-data
channelCount = 4

Or you can embed the storage configuration using the storage. prefix:

cache-config.properties
keyType = java.lang.Integer
valueType = java.lang.String
readThrough = true
writeThrough = true
storage.baseDirectory = ~/cache-data
storage.channelCount = 4

Spring example:

application.properties
application.yml
application.properties
spring.jpa.properties.hibernate.cache.microstream.missing_cache_strategy = create
spring.jpa.properties.hibernate.cache.microstream.readThrough = true
spring.jpa.properties.hibernate.cache.microstreamwriteThrough = true
spring.jpa.properties.hibernate.cache.microstream.storage.baseDirectory = ~/cache-data
spring.jpa.properties.hibernate.cache.microstream.storage.channelCount = 4
spring.jpa.properties.hibernate.cache.region.factory_class = one.microstream.cache.hibernate.CacheRegionFactory
spring.jpa.properties.hibernate.cache.use_query_cache = true
spring.jpa.properties.hibernate.cache.use_second_level_cache = true
application.yml
spring:
jpa:
properties:
hibernate:
cache:
microstream:
missing_cache_strategy: create
readThrough: true
writeThrough: true
storage:
baseDirectory: ~/cache-data
channelCount: 4
region:
factory_class: one.microstream.cache.hibernate.CacheRegionFactory
use_query_cache: true
use_second_level_cache: true