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CacheManager.java
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CacheManager.java
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/**
* Copyright (C) 2019 Czech Technical University in Prague
*
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details. You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package cz.cvut.kbss.jopa.sessions;
import cz.cvut.kbss.jopa.model.descriptors.Descriptor;
import java.util.Set;
/**
* This interface defines basic methods for accessing the shared live object cache.
*/
public interface CacheManager extends Cache {
/**
* Adds the specified object into the shared session cache.
* <p>
* If the cache already contains object with the specified identifier (and it is in the same repository context),
* it is replaced with the one passed as argument.
*
* @param identifier Identifier of the specified object
* @param entity The object to be added into the cache
* @param descriptor Instance descriptor, contains info about repository context(s) and language tags
*/
void add(Object identifier, Object entity, Descriptor descriptor);
/**
* Gets entity with the specified identifier from the cache.
* <p>
* The entity is searched for in the context specified by {@code descriptor}. Thus all three conditions - class,
* identifier and descriptor must match to return a result.
*
* @param cls Class of the entity
* @param identifier Primary key of the entity
* @param descriptor Instance descriptor, contains info about repository context(s) and language tags
* @return Entity with the specified primary key or {@code null}
*/
<T> T get(Class<T> cls, Object identifier, Descriptor descriptor);
/**
* Removes objects with (possibly) inferred attributes from the cache.
*
* This should be called when changes in the ontology may influence inference results.
*/
void evictInferredObjects();
/**
* Set the inferred classes for this cache manager.
* <p>
* Entities from inferred classes are special in that when anything in the ontology changes, they have to be evicted
* from the cache, since they are reasoned and their attributes may change.
*
* @param inferredClasses Set of inferred classes
*/
void setInferredClasses(Set<Class<?>> inferredClasses);
/**
* Closes the cache.
*/
void close();
}