core/src/test/java/org/apache/shiro/config/HashMapCacheManager.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.shiro.config;

import org.apache.shiro.cache.AbstractCacheManager;
import org.apache.shiro.cache.Cache;
import org.apache.shiro.cache.CacheException;
import org.apache.shiro.cache.MapCache;

import java.util.HashMap;

/**
 * Returns HashMap-backed cache instances for testing only.  NEVER use this in production, as it would cause
 * memory leaks since HashMaps retain strong references.
 *
 * @since 1.0
 */
@SuppressWarnings("checkstyle:JavadocType")
public class HashMapCacheManager<K, V> extends AbstractCacheManager {

    @Override
    protected <K, V> Cache<K, V> createCache(String name) throws CacheException {
        return new HashMapCache<>(name);
    }

    //This class is not strictly necessary - it exists to verify a test case only.

    public class HashMapCache<K, V> extends MapCache<K, V> {
        public HashMapCache(String name) {
            super(name, new HashMap<K, V>());
        }
    }
}