/**
 * Logback: the reliable, generic, fast and flexible logging framework.
 * Copyright (C) 1999-2011, QOS.ch. All rights reserved.
 *
 * This program and the accompanying materials are dual-licensed under
 * either the terms of the Eclipse Public License v1.0 as published by
 * the Eclipse Foundation
 *
 *   or (per the licensee's choosing)
 *
 * under the terms of the GNU Lesser General Public License version 2.1
 * as published by the Free Software Foundation.
 */
package ch.qos.logback.classic.issue.lbclassic36;

import junit.framework.TestCase;
import junit.framework.Test;
import junit.framework.TestSuite;

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

import org.joda.time.format.DateTimeFormatter;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.DateTime;

public class DateFormatOriginal_tzest extends TestCase {
  public static final String ISO8601_PATTERN = "yyyy-MM-dd HH:mm:ss,SSS";
  static final long NANOS_IN_ONE_SEC = 1000 * 1000 * 1000L;

  /**
   * Create the test case
   * 
   * @param testName
   *                name of the test case
   */
  public DateFormatOriginal_tzest(String testName) {
    super(testName);
  }

  /**
   * @return the suite of tests being tested
   */
  public static Test suite() {
    return new TestSuite(DateFormatOriginal_tzest.class);
  }

  public static void main(String[] args) {
    junit.textui.TestRunner.run(suite());
  }

  public void setUp() throws Exception {
    super.setUp();
  }

  public void tearDown() throws Exception {
    super.tearDown();
  }

  public void testRaw() throws Exception {
    SimpleDateFormat simpleFormat = new SimpleDateFormat(ISO8601_PATTERN);
    DateTimeFormatter jodaFormat = DateTimeFormat.forPattern(ISO8601_PATTERN);

    Date date = new Date();
    DateTime dateTime = new DateTime(date);

    long start = System.nanoTime();
    for (int i = 0; i < 100000; ++i) {
      jodaFormat.print(dateTime);
    }
    long jodaAvg = (System.nanoTime() - start) / 100000;

    
     start = System.nanoTime();
    for (int i = 0; i < 100000; ++i) {
      simpleFormat.format(date);
    }
    long simpleAvg = (System.nanoTime() - start) / 100000;

    float diff = (((float) (simpleAvg - jodaAvg)) / simpleAvg) * 100;
    System.out.println("Raw - JDK: " + simpleAvg + " ns Joda: " + jodaAvg
        + " ns - Difference: " + diff + "%");
  }

  public void testSynchronized() throws Exception {
    SynchronizedDateFormatter formatter = new SynchronizedDateFormatter();
    int threads = 10;
    int iterations = 10000;
    Thread[] formatThreads = new Thread[threads];
    Date date = new Date();

    for (int i = 0; i < threads; i++) {
      formatThreads[i] = new DateFormatThread(formatter, date, iterations);
    }
    long start = System.nanoTime();
    for (Thread thread : formatThreads) {
      thread.start();
    }
    for (Thread thread : formatThreads) {
      thread.join();
    }
    long end = System.nanoTime();
    double actual = ((double) (end - start)) / NANOS_IN_ONE_SEC;
    System.out.printf("Synchronized DateFormat: %,.4f seconds\n", actual);

  }

  public void testUnSynchronized() throws Exception {
    UnsynchronizedDateFormatter formatter = new UnsynchronizedDateFormatter();
    int threads = 10;
    int iterations = 10000;
    Thread[] formatThreads = new Thread[threads];
    Date date = new Date();

    for (int i = 0; i < threads; i++) {
      formatThreads[i] = new DateFormatThread(formatter, date, iterations);
    }
    long start = System.nanoTime();
    for (Thread thread : formatThreads) {
      thread.start();
    }
    for (Thread thread : formatThreads) {
      thread.join();
    }
    long end = System.nanoTime();
    double actual = ((double) (end - start)) / NANOS_IN_ONE_SEC;
    System.out.printf("Unsynchronized DateFormat: %,.4f seconds\n", actual);

  }

  public void testThreadLocal() throws Exception {
    ThreadLocalDateFormatter formatter = new ThreadLocalDateFormatter();
    int threads = 10;
    int iterations = 10000;
    Thread[] formatThreads = new Thread[threads];
    Date date = new Date();

    for (int i = 0; i < threads; i++) {
      formatThreads[i] = new DateFormatThread(formatter, date, iterations);
    }
    long start = System.nanoTime();
    for (Thread thread : formatThreads) {
      thread.start();
    }
    for (Thread thread : formatThreads) {
      thread.join();
    }
    long end = System.nanoTime();
    double actual = ((double) (end - start)) / NANOS_IN_ONE_SEC;
    System.out.printf("ThreadLocal DateFormat: %,.4f seconds\n", actual);

  }

  public void testDateTimeFormatter() throws Exception {
    int threads = 10;
    int iterations = 10000;
    Thread[] formatThreads = new DateTimeFormatThread[threads];
    JodaFormatter formatter = new JodaFormatter();
    Date date = new Date();
    DateTime dateTime = new DateTime(date);

    for (int i = 0; i < threads; i++) {
      formatThreads[i] = new DateTimeFormatThread(formatter, dateTime,
          iterations);
    }
    long start = System.nanoTime();
    for (Thread thread : formatThreads) {
      thread.start();
    }
    for (Thread thread : formatThreads) {
      thread.join();
    }
    long end = System.nanoTime();
    double actual = ((double) (end - start)) / NANOS_IN_ONE_SEC;
    System.out.printf("Joda DateTimeFormatter: %,.4f seconds\n", actual);

  }

  public static interface Formatter {
    String format(Date date);
  }

  public static class SynchronizedDateFormatter implements Formatter {
    SimpleDateFormat simpleFormat = new SimpleDateFormat(ISO8601_PATTERN);

    public synchronized String format(Date date) {
      return simpleFormat.format(date);
    }
  }

  public static class UnsynchronizedDateFormatter implements Formatter {
    public synchronized String format(Date date) {
      return new SimpleDateFormat(ISO8601_PATTERN).format(date);
    }
  }

  public static class ThreadLocalDateFormatter implements Formatter {
    ThreadLocal<SimpleDateFormat> formatter = new ThreadLocal<SimpleDateFormat>() {
      protected synchronized SimpleDateFormat initialValue() {
        return new SimpleDateFormat(ISO8601_PATTERN);
      }
    };

    public String format(Date date) {
      return formatter.get().format(date);
    }
  }

  public static class JodaFormatter {
    DateTimeFormatter formatter = DateTimeFormat.forPattern(ISO8601_PATTERN);

    public String format(DateTime date) {
      return formatter.print(date);
    }
  }

  public static class DateFormatThread extends Thread {
    Formatter formatter;
    Date date;
    long iterCount;

    public DateFormatThread(Formatter f, Date date, long iterations) {
      this.formatter = f;
      this.date = date;
      this.iterCount = iterations;
    }

    public void run() {
      for (int i = 0; i < iterCount; i++) {
        formatter.format(this.date);
      }
    }
  }

  public static class DateTimeFormatThread extends Thread {
    JodaFormatter formatter;
    DateTime date;
    long iterCount;

    public DateTimeFormatThread(JodaFormatter f, DateTime date, long iterations) {
      this.formatter = f;
      this.date = date;
      this.iterCount = iterations;
    }

    public void run() {
      for (int i = 0; i < iterCount; i++) {
        formatter.format(this.date);
      }
    }
  }
}
