/*
 * 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.skywalking.oap.server.core.analysis.data;

import org.apache.skywalking.oap.server.core.analysis.indicator.Indicator;

/**
 * @author peng-yongsheng
 */
public class MergeDataCache<INDICATOR extends Indicator> extends Window<INDICATOR> implements DataCache {

    private SWCollection<INDICATOR> lockedMergeDataCollection;

    @Override public SWCollection<INDICATOR> collectionInstance() {
        return new MergeDataCollection<>();
    }

    public boolean containsKey(INDICATOR key) {
        return lockedMergeDataCollection.containsKey(key);
    }

    public Indicator get(INDICATOR key) {
        return lockedMergeDataCollection.get(key);
    }

    public void put(INDICATOR data) {
        lockedMergeDataCollection.put(data);
    }

    @Override public void writing() {
        lockedMergeDataCollection = getCurrentAndWriting();
    }

    @Override public void finishWriting() {
        lockedMergeDataCollection.finishWriting();
        lockedMergeDataCollection = null;
    }
}
