/*
 * Copyright 2002-2018 the original author or authors.
 *
 * 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.
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package org.springframework.cache.support;

import java.util.concurrent.Callable;

import org.springframework.cache.Cache;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;

A no operation Cache implementation suitable for disabling caching.

Will simply accept any items into the cache not actually storing them.

Author:Costin Leau, Stephane Nicoll
Since:4.3.4
/** * A no operation {@link Cache} implementation suitable for disabling caching. * * <p>Will simply accept any items into the cache not actually storing them. * * @author Costin Leau * @author Stephane Nicoll * @since 4.3.4 */
public class NoOpCache implements Cache { private final String name;
Create a NoOpCache instance with the specified name.
Params:
  • name – the name of the cache
/** * Create a {@link NoOpCache} instance with the specified name. * @param name the name of the cache */
public NoOpCache(String name) { Assert.notNull(name, "Cache name must not be null"); this.name = name; } @Override public String getName() { return this.name; } @Override public Object getNativeCache() { return this; } @Override @Nullable public ValueWrapper get(Object key) { return null; } @Override @Nullable public <T> T get(Object key, @Nullable Class<T> type) { return null; } @Override @Nullable public <T> T get(Object key, Callable<T> valueLoader) { try { return valueLoader.call(); } catch (Exception ex) { throw new ValueRetrievalException(key, valueLoader, ex); } } @Override public void put(Object key, @Nullable Object value) { } @Override @Nullable public ValueWrapper putIfAbsent(Object key, @Nullable Object value) { return null; } @Override public void evict(Object key) { } @Override public void clear() { } }