com.clust4j.log.LogTimer.java Source code

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Here is the source code for com.clust4j.log.LogTimer.java

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/*******************************************************************************
 *    Copyright 2015, 2016 Taylor G Smith
 *
 *    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.clust4j.log;

import java.text.SimpleDateFormat;
import java.util.Date;

import org.apache.commons.math3.util.FastMath;

public class LogTimer implements Timer {
    private static final ThreadLocal<SimpleDateFormat> dateFormat = new ThreadLocal<SimpleDateFormat>() {
        @Override
        protected SimpleDateFormat initialValue() {
            return new SimpleDateFormat("dd-MMM HH:mm:ss.SSS");
        }
    };

    private static final ThreadLocal<SimpleDateFormat> shortFormat = new ThreadLocal<SimpleDateFormat>() {
        @Override
        protected SimpleDateFormat initialValue() {
            return new SimpleDateFormat("HH:mm:ss.SSS");
        }
    };

    public final long _start = System.currentTimeMillis();
    public final long _nanos = System.nanoTime();

    // Empty constructor
    public LogTimer() {
    }

    /**Return the difference between when the timer was created and the current time. */
    @Override
    public long time() {
        return System.currentTimeMillis() - _start;
    }

    @Override
    public long nanos() {
        return System.nanoTime() - _nanos;
    }

    /**
     * Formats the time differential between {@link #now()} and {@link #_start}
     * @return the formatted time as a String
     */
    public String formatTime() {
        return formatTime(now() - _start);
    }

    /**
     * Formats the time differential between timeEnd and timeStart
     * @param timeStart
     * @param timeEnd
     * @return the formatted time as a String
     */
    public String formatTime(long timeStart, long timeEnd) {
        long te = FastMath.max(timeStart, timeEnd);
        long ts = FastMath.min(timeStart, timeEnd);
        return formatTime(te - ts);
    }

    public String formatTime(long millis) {
        return LogTimeFormatter.millis(millis, false);
    }

    @Override
    public String toString() {
        final long now = now();
        return LogTimeFormatter.millis(now - _start, false) + " " + wallMsg(now);
    }

    public String wallMsg() {
        return wallMsg(now());
    }

    private String wallMsg(final long now) {
        return "(Wall: " + wallTime(now) + ") ";
    }

    public String wallTime() {
        return wallTime(now());
    }

    public String wallTime(long now) {
        return dateFormat.get().format(new Date(now));
    }

    /** return the start time of this timer.**/
    @Override
    public String startAsString() {
        return dateFormat.get().format(new Date(_start));
    }

    /** return the start time of this timer.**/
    @Override
    public String startAsShortString() {
        return shortFormat.get().format(new Date(_start));
    }

    /** return the current time of this timer.**/
    @Override
    public String nowAsString() {
        return dateFormat.get().format(new Date(now()));
    }

    /** return the current time of this timer.**/
    @Override
    public String nowAsShortString() {
        return shortFormat.get().format(new Date(now()));
    }

    public long now() {
        return System.currentTimeMillis();
    }
}