Kotlin ehcache example

kotlin-ehcache.kt

val cacheManager = CacheManagerBuilder.newCacheManagerBuilder()
            .with(CacheManagerPersistenceConfiguration(storagePath))
            .withCache("kweetsCache",
                    CacheConfigurationBuilder.newCacheConfigurationBuilder<Int, Kweet>()
                            .withResourcePools(ResourcePoolsBuilder.newResourcePoolsBuilder()
                                    .heap(1000, EntryUnit.ENTRIES)
                                    .offheap(10, MemoryUnit.MB)
                                    .disk(100, MemoryUnit.MB, true)
                            )
                            .buildConfig(Int::class.javaObjectType, Kweet::class.java))
            .build(true)

Notice Int::class.javaObjectType that is required for ehcache to avoid the following

Caused by: java.lang.IllegalStateException: Cache 'kweetsCache' creation in EhcacheManager failed.
    at org.ehcache.EhcacheManager.createCache(EhcacheManager.java:226)
    at org.ehcache.EhcacheManager.init(EhcacheManager.java:464)
    ... 17 more
Caused by: java.lang.RuntimeException: org.ehcache.spi.serialization.UnsupportedTypeException: No serializer found for type 'int'
    at org.ehcache.EhcacheManager.createNewEhcache(EhcacheManager.java:305)
    at org.ehcache.EhcacheManager.createCache(EhcacheManager.java:202)
    ... 18 more
Caused by: org.ehcache.spi.serialization.UnsupportedTypeException: No serializer found for type 'int'
    at org.ehcache.spi.serialization.DefaultSerializationProvider$AbstractProvider.getClassFor(DefaultSerializationProvider.java:244)
    at org.ehcache.spi.serialization.DefaultSerializationProvider$PersistentProvider.createSerializer(DefaultSerializationProvider.java:165)
    at org.ehcache.spi.serialization.DefaultSerializationProvider$AbstractProvider.createKeySerializer(DefaultSerializationProvider.java:202)
    at org.ehcache.spi.serialization.DefaultSerializationProvider.createKeySerializer(DefaultSerializationProvider.java:77)
    at org.ehcache.EhcacheManager.createNewEhcache(EhcacheManager.java:295)
    ... 19 more

Not necessarily Int::class.javaObjectType but your Entity's primary key.