net.sf.ehcache.store.NullStore Maven / Gradle / Ivy
/**
* Copyright 2003-2010 Terracotta, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.sf.ehcache.store;
import net.sf.ehcache.CacheException;
import net.sf.ehcache.Element;
import net.sf.ehcache.Status;
import net.sf.ehcache.writer.CacheWriterManager;
import java.io.IOException;
import java.util.Collections;
import java.util.List;
import java.util.Set;
/**
* A store implementation which does not store anything.
*
* @author Ludovic Orban
*/
public final class NullStore extends AbstractStore implements TierableStore {
private NullStore() {
}
/**
* Create a new NullStore instance.
* @return a NullStore instance
*/
public static NullStore create() {
return new NullStore();
}
/**
* {@inheritDoc}
*/
public void unpinAll() {
}
/**
* {@inheritDoc}
*/
public boolean isPinned(Object key) {
return false;
}
/**
* {@inheritDoc}
*/
public void setPinned(Object key, boolean pinned) {
}
/**
* {@inheritDoc}
*/
public boolean put(Element element) throws CacheException {
return false;
}
/**
* {@inheritDoc}
*/
public boolean putWithWriter(Element element, CacheWriterManager writerManager) throws CacheException {
return false;
}
/**
* {@inheritDoc}
*/
public Element get(Object key) {
return null;
}
/**
* {@inheritDoc}
*/
public Element getQuiet(Object key) {
return null;
}
/**
* {@inheritDoc}
*/
public List getKeys() {
return Collections.emptyList();
}
/**
* {@inheritDoc}
*/
public Element remove(Object key) {
return null;
}
/**
* {@inheritDoc}
*/
public void removeNoReturn(Object key) {
}
/**
* {@inheritDoc}
*/
public boolean isTierPinned() {
return false;
}
/**
* {@inheritDoc}
*/
public Set getPresentPinnedKeys() {
return Collections.emptySet();
}
/**
* {@inheritDoc}
*/
public boolean isPersistent() {
return false;
}
/**
* {@inheritDoc}
*/
public Element removeWithWriter(Object key, CacheWriterManager writerManager) throws CacheException {
return null;
}
/**
* {@inheritDoc}
*/
public void removeAll() throws CacheException {
}
/**
* {@inheritDoc}
*/
public Element putIfAbsent(Element element) throws NullPointerException {
return null;
}
/**
* {@inheritDoc}
*/
public Element removeElement(Element element, ElementValueComparator comparator) throws NullPointerException {
return null;
}
/**
* {@inheritDoc}
*/
public boolean replace(Element old, Element element, ElementValueComparator comparator) throws NullPointerException, IllegalArgumentException {
return false;
}
/**
* {@inheritDoc}
*/
public Element replace(Element element) throws NullPointerException {
return null;
}
/**
* {@inheritDoc}
*/
public void dispose() {
}
/**
* {@inheritDoc}
*/
public int getSize() {
return 0;
}
/**
* {@inheritDoc}
*/
public int getInMemorySize() {
return 0;
}
/**
* {@inheritDoc}
*/
public int getOffHeapSize() {
return 0;
}
/**
* {@inheritDoc}
*/
public int getOnDiskSize() {
return 0;
}
/**
* {@inheritDoc}
*/
public int getTerracottaClusteredSize() {
return 0;
}
/**
* {@inheritDoc}
*/
public long getInMemorySizeInBytes() {
return 0;
}
/**
* {@inheritDoc}
*/
public long getOffHeapSizeInBytes() {
return 0;
}
/**
* {@inheritDoc}
*/
public long getOnDiskSizeInBytes() {
return 0;
}
/**
* {@inheritDoc}
*/
public Status getStatus() {
return null;
}
/**
* {@inheritDoc}
*/
public boolean containsKey(Object key) {
return false;
}
/**
* {@inheritDoc}
*/
public boolean containsKeyOnDisk(Object key) {
return false;
}
/**
* {@inheritDoc}
*/
public boolean containsKeyOffHeap(Object key) {
return false;
}
/**
* {@inheritDoc}
*/
public boolean containsKeyInMemory(Object key) {
return false;
}
/**
* {@inheritDoc}
*/
public void expireElements() {
}
/**
* {@inheritDoc}
*/
public void flush() throws IOException {
}
/**
* {@inheritDoc}
*/
public boolean bufferFull() {
return false;
}
/**
* {@inheritDoc}
*/
public Policy getInMemoryEvictionPolicy() {
return null;
}
/**
* {@inheritDoc}
*/
public void setInMemoryEvictionPolicy(Policy policy) {
}
/**
* {@inheritDoc}
*/
public Object getInternalContext() {
return null;
}
/**
* {@inheritDoc}
*/
public Object getMBean() {
return null;
}
/**
* {@inheritDoc}
*/
public void fill(Element e) {
//no-op
}
/**
* {@inheritDoc}
*/
public boolean removeIfTierNotPinned(final Object key) {
return remove(key) != null;
}
/**
* {@inheritDoc}
*/
public void recalculateSize(Object key) {
// no-op
}
}