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/*
 * 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.wgzhao.addax.common.statistics;

import java.util.concurrent.TimeUnit;

/**
 * PerfTrace 记录 job（local模式），taskGroup（distribute模式），因为这2种都是jvm，即一个jvm里只需要有1个PerfTrace。
 */

public class PerfTrace
{

    private static PerfTrace instance;
    //PHASE => PerfRecord
    private int channelNumber;

    private PerfTrace()
    {
    }

    public static synchronized PerfTrace getInstance()
    {
        if (instance == null) {
            instance = new PerfTrace();
        }
        return instance;
    }

    //缺省传入的时间是nano
    public static String unitTime(long time)
    {
        return unitTime(time, TimeUnit.NANOSECONDS);
    }

    public static String unitTime(long time, TimeUnit timeUnit)
    {
        return String.format("%,.3fs", ((float) timeUnit.toNanos(time)) / 1000000000);
    }

    public void setChannelNumber(int needChannelNumber)
    {
        this.channelNumber = needChannelNumber;
    }
}