/*
 * 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.apm.collector.analysis.worker.model.impl.data;

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import org.apache.skywalking.apm.collector.core.cache.Collection;
import org.apache.skywalking.apm.collector.core.data.StreamData;

/**
 * @author peng-yongsheng
 */
public class DataCollection<STREAM_DATA extends StreamData> implements Collection<Map<String, STREAM_DATA>> {
    private Map<String, STREAM_DATA> data;
    private volatile boolean writing;
    private volatile boolean reading;

    DataCollection() {
        this.data = new ConcurrentHashMap<>();
        this.writing = false;
        this.reading = false;
    }

    public void finishWriting() {
        writing = false;
    }

    @Override public void writing() {
        writing = true;
    }

    @Override public boolean isWriting() {
        return writing;
    }

    @Override public void finishReading() {
        reading = false;
    }

    @Override public void reading() {
        reading = true;
    }

    @Override public boolean isReading() {
        return reading;
    }

    boolean containsKey(String key) {
        return data.containsKey(key);
    }

    void put(String key, STREAM_DATA value) {
        data.put(key, value);
    }

    public STREAM_DATA get(String key) {
        return data.get(key);
    }

    @Override public int size() {
        return data.size();
    }

    @Override public void clear() {
        data.clear();
    }

    public Map<String, STREAM_DATA> collection() {
        return data;
    }
}
