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/**
 * Copyright (c) 2013-2021 Nikita Koksharov
 *
 * 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 com.github.lontime.shaded.org.redisson.cache;

import java.lang.ref.ReferenceQueue;

import com.github.lontime.shaded.org.redisson.cache.ReferenceCachedValue.Type;

/**
 * 
 * @author Nikita Koksharov
 *
 * @param  key
 * @param  value
 */
public class ReferenceCacheMap extends AbstractCacheMap {

    private final ReferenceQueue queue = new ReferenceQueue();
    
    private final ReferenceCachedValue.Type type;
    
    public static  ReferenceCacheMap weak(long timeToLiveInMillis, long maxIdleInMillis) {
        return new ReferenceCacheMap(timeToLiveInMillis, maxIdleInMillis, Type.WEAK);
    }
    
    public static  ReferenceCacheMap soft(long timeToLiveInMillis, long maxIdleInMillis) {
        return new ReferenceCacheMap(timeToLiveInMillis, maxIdleInMillis, Type.SOFT);
    }
    
    ReferenceCacheMap(long timeToLiveInMillis, long maxIdleInMillis, ReferenceCachedValue.Type type) {
        super(0, timeToLiveInMillis, maxIdleInMillis);
        this.type = type;
    }

    @Override
    protected CachedValue create(K key, V value, long ttl, long maxIdleTime) {
        return new ReferenceCachedValue(key, value, ttl, maxIdleTime, queue, type);
    }
    
    @Override
    protected boolean isFull(K key) {
        return true;
    }

    @Override
    protected boolean removeExpiredEntries() {
        while (true) {
            CachedValueReference value = (CachedValueReference) queue.poll();
            if (value == null) {
                break;
            }
            map.remove(value.getOwner().getKey(), value.getOwner());
        }
        return super.removeExpiredEntries();
    }
    
    @Override
    protected void onMapFull() {
    }
    
}