/**
 * 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 com.alibaba.jstorm.utils;

import java.io.Serializable;
import java.util.concurrent.atomic.AtomicLong;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class TpsCounter implements Serializable {
    
    private static final long serialVersionUID = 2177944366059817622L;
    private AtomicLong        total            = new AtomicLong(0);
    private AtomicLong        times            = new AtomicLong(0);
    private AtomicLong        values           = new AtomicLong(0);
    
    private IntervalCheck intervalCheck;
    
    private final String id;
    private final Logger LOG;
    
    public TpsCounter() {
        this("", TpsCounter.class);
    }
    
    public TpsCounter(String id) {
        this(id, TpsCounter.class);
    }
    
    public TpsCounter(Class tclass) {
        this("", tclass);
    }
    
    public TpsCounter(String id, Class tclass) {
        this.id = id;
        this.LOG = LoggerFactory.getLogger(tclass);
        
        intervalCheck = new IntervalCheck();
        intervalCheck.setInterval(60);
    }
    
    public Double count(long value) {
        long totalValue = total.incrementAndGet();
        long timesValue = times.incrementAndGet();
        long v = values.addAndGet(value);
        
        Double pass = intervalCheck.checkAndGet();
        if (pass != null) {
            times.set(0);
            values.set(0);
            
            Double tps = timesValue / pass;
            
            StringBuilder sb = new StringBuilder();
            sb.append(id);
            sb.append(", tps:" + tps);
            sb.append(", avg:" + ((double) v) / timesValue);
            sb.append(", total:" + totalValue);
            LOG.info(sb.toString());
            
            return tps;
        }
        
        return null;
    }
    
    public Double count() {
        return count(1L);
    }
    
    public void cleanup() {
        LOG.info(id + ", total:" + total);
    }
    
    public IntervalCheck getIntervalCheck() {
        return intervalCheck;
    }
}