Ehcache 란

* EhCache는 경량의 빠른 캐시 엔진으로 확장/분산 기능을 지원하며 높은 품질을 제공.

* xml 설정
<ehcache>
    <diskStore path="java.io.tmpdir"/>
    <cache name="simpleBeanCache"
              maxElementsInMemory="10000"
              eternal="false"
              timeToIdleSeconds="120"
              timeToLiveSeconds="120"
              overflowToDisk="true"
              maxElementsOnDisk="10000000"
              diskPersistent="false"
              diskExpiryThreadIntervalSeconds="120"
              memoryStoreEvictionPolicy="LRU"
    />
</ehcache>

* Cache 조회하기
CacheManager cacheManager = CacheManager.create();
Cache cache = cacheManager.getCache("simpleCacheBean");

* Cache 생성/수정하기
CacheManager cacheManager = CacheManager.create();
Cache cache = cacheManager.getCache("simpleCacheBean");
cache.put(newElement);

* Cache 삭제하기
CacheManager cacheManager = CacheManager.create();
cache.remove("SimpleCacheBean");