Estoy usando Ehcache para almacenar en la memoria caché objetos que son muy caros de cargar en mi aplicación. En la puesta en marcha, guardo en la memoria caché todos los objetos necesarios y se actualizan una vez al día mediante un proceso por separado.Ehcache perder objetos
Sin embargo, parece que poco después de agregar objetos a la memoria caché, desaparecen. No se informa de nada como desalojado, pero los objetos no duran en la memoria caché por alguna razón. Cuando corro ObjectLoader.loadCache() esta es la salida que estoy recibiendo:
2012-09-01 17:25:37,121 [main] DEBUG ObjectLoader.getObject():65 - ************************************
2012-09-01 17:25:37,121 [main] DEBUG ObjectLoader.getObject():66 - Number of objects in cache: 0
2012-09-01 17:25:37,121 [main] DEBUG ObjectLoader.getObject():72 - Object not in cache | 501
2012-09-01 17:26:17,271 [main] DEBUG ObjectLoader.getObject():80 - Number of objects in cache: 1
2012-09-01 17:26:17,271 [main] DEBUG ObjectLoader.getObject():81 - Number of objects evicted from cache: 0
2012-09-01 17:26:17,274 [main] DEBUG ObjectLoader.getObject():83 - Object key found: 501
2012-09-01 17:26:17,274 [main] DEBUG ObjectLoader.getObject():65 - ************************************
2012-09-01 17:26:17,274 [main] DEBUG ObjectLoader.getObject():66 - Number of objects in cache: 1
2012-09-01 17:26:17,274 [main] DEBUG ObjectLoader.getObject():72 - Object not in cache | 518
2012-09-01 17:26:35,894 [main] DEBUG ObjectLoader.getObject():80 - Number of objects in cache: 1
2012-09-01 17:26:35,895 [main] DEBUG ObjectLoader.getObject():81 - Number of objects evicted from cache: 0
2012-09-01 17:26:35,895 [main] DEBUG ObjectLoader.getObject():83 - Object key found: 518
2012-09-01 17:26:35,895 [main] DEBUG ObjectLoader.getObject():65 - ************************************
2012-09-01 17:26:35,895 [main] DEBUG ObjectLoader.getObject():66 - Number of objects in cache: 1
2012-09-01 17:26:35,895 [main] DEBUG ObjectLoader.getObject():72 - Object not in cache | 516
2012-09-01 17:27:31,997 [main] DEBUG ObjectLoader.getObject():80 - Number of objects in cache: 1
2012-09-01 17:27:31,998 [main] DEBUG ObjectLoader.getObject():81 - Number of objects evicted from cache: 0
2012-09-01 17:27:31,998 [main] DEBUG ObjectLoader.getObject():83 - Object key found: 516
2012-09-01 17:27:31,998 [main] DEBUG ObjectLoader.getObject():65 - ************************************
2012-09-01 17:27:31,998 [main] DEBUG ObjectLoader.getObject():66 - Number of objects in cache: 1
2012-09-01 17:27:31,998 [main] DEBUG ObjectLoader.getObject():72 - Object not in cache | 515
2012-09-01 17:28:20,343 [main] DEBUG ObjectLoader.getObject():80 - Number of objects in cache: 1
2012-09-01 17:28:20,343 [main] DEBUG ObjectLoader.getObject():81 - Number of objects evicted from cache: 0
2012-09-01 17:28:20,344 [main] DEBUG ObjectLoader.getObject():83 - Object key found: 515
2012-09-01 17:28:20,344 [main] DEBUG ObjectLoader.getObject():65 - ************************************
2012-09-01 17:28:20,344 [main] DEBUG ObjectLoader.getObject():66 - Number of objects in cache: 1
2012-09-01 17:28:20,344 [main] DEBUG ObjectLoader.getObject():72 - Object not in cache | 525
2012-09-01 17:29:05,616 [main] DEBUG ObjectLoader.getObject():80 - Number of objects in cache: 1
2012-09-01 17:29:05,617 [main] DEBUG ObjectLoader.getObject():81 - Number of objects evicted from cache: 0
2012-09-01 17:29:05,617 [main] DEBUG ObjectLoader.getObject():83 - Object key found: 525
2012-09-01 17:29:05,617 [main] DEBUG ObjectLoader.getObject():65 - ************************************
2012-09-01 17:29:05,617 [main] DEBUG ObjectLoader.getObject():66 - Number of objects in cache: 1
2012-09-01 17:29:05,618 [main] DEBUG ObjectLoader.getObject():72 - Object not in cache | 512
2012-09-01 17:29:38,790 [main] DEBUG ObjectLoader.getObject():80 - Number of objects in cache: 1
2012-09-01 17:29:38,790 [main] DEBUG ObjectLoader.getObject():81 - Number of objects evicted from cache: 0
2012-09-01 17:29:38,790 [main] DEBUG ObjectLoader.getObject():83 - Object key found: 512
qué tengo Ehcache configurado mal o tengo un error en mi código? Cualquier ayuda sería apreciada. Gracias.
estoy usando la primavera 3.1.0, Ehcache-primavera-anotaciones 1.1.2, y ehcache 2.4.2
ObjectCacheFacade.java
@Component()
public class ObjectCacheFacade {
private static final String CACHE_KEY = "myObjectCache";
@Resource
private CacheManager cacheManager;
private Cache cache;
public ObjectCacheFacade() {
cacheManager = CacheManager.getInstance();
this.cache = cacheManager.getCache(CACHE_KEY);
}
public Object getObjectFromCache(String objectId) {
Object result = null;
Element element = cache.get(objectId);
if (element != null && element.getValue() != null) {
result = element.getObjectValue();
}
return result;
}
public void putObjectIntoCache(String objectId, Object object) {
Element element = new Element(objectId, object);
cache.put(element);
}
public int getSize() {
return cache.getSize();
}
public void removeObjectFromCache(String objectId) {
cache.remove(objectId);
}
public void flushCache() {
cache.removeAll();
}
public Cache getCache() {
return cache;
}
}
ObjectLoader.java
@Service
public class ObjectLoader {
private static final Logger log = Logger.getLogger(ObjectLoader.class);
@Resource
protected ObjectDao objectDao;
@Resource
protected ObjectCacheFacade objectCache;
public void loadCache() {
List<String> objectIds = objectDao.getObjectIds();
for (String objectId : objectIds) {
loadObject(objectId);
}
}
public Object getObject(String objectId) {
log.debug("************************************");
log.debug("Number of objects in cache: " + objectCache.getSize());
Object object = objectCache.getObjectFromCache(objectId);
if (object == null) {
log.debug("Object not in cache | " + objectId);
object = objectDao.getObject(objectId);
if (object != null) {
objectCache.putObjectIntoCache(objectId, object);
log.debug("Number of objects in cache: " + objectCache.getSize());
log.debug("Number of objects evicted from cache: " + objectCache.getCache().getCacheEventNotificationService().getElementsEvictedCounter());
for (Object key : objectCache.getCache().getKeys()) {
log.debug("Object key found: " + key);
}
}
}
return object;
}
}
ehcache.xml
<ehcache>
<diskStore path="java.io.tmpdir"/>
<defaultCache
maxElementsInMemory="1000"
eternal="false"
timeToIdleSeconds="60"
timeToLiveSeconds="300"
overflowToDisk="false"
memoryStoreEvictionPolicy="LRU"
/>
<cache
name="myObjectCache"
maxElementsInMemory="1000"
eternal="true"
timeToIdleSeconds="0"
timeToLiveSeconds="0"
overflowToDisk="false"
diskPersistent="true"
memoryStoreEvictionPolicy="LRU"
/>
</ehcache>
applicationContext.xml
<bean id="cacheManager" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean" />
Sospecho que desea overflowToDisk = "true". Además, si está utilizando EHCache 2.6 o posterior, en su lugar debería usar . Eche un vistazo a http://ehcache.org/documentation/configuration/fast-restart –
GreyBeardedGeek