java并发 使用ScheduledExecutor的温室控制器--thinking in java 21.7.5
package org.rui.thread.newc;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Collections;
import java.util.List;
import java.util.Random;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
/**
* 温室 控制器
* @author lenovo
*
*/
public class GreenhouseScheduler
{
private volatile boolean light = false;// 光
private volatile boolean water = false;// 水
private String thermostat = "Day";// 自动调温器
public synchronized String getThermostat()
{
return thermostat;
}
public synchronized void setThermostat(String thermostat)
{
this.thermostat = thermostat;
}
// 调度程序
ScheduledThreadPoolExecutor scheduler = new ScheduledThreadPoolExecutor(10);
/**
*
* @param event
* @param delay 延迟
*/
public void scheduler(Runnable event, long delay)
{
/**
* 建并执行在给定延迟后启用的一次性操作。
*/
scheduler.schedule(event, delay, TimeUnit.MILLISECONDS);
}
/**
* 重复
* @param envent
* @param initialDelay
* @param period 连续执行之间的周期 时间越少 执行的越快
*/
public void repeat(Runnable envent, long initialDelay, long period)
{
/**
* 创建并执行一个在给定初始延迟后首次启用的定期操作，后续操作具有给定的周期；也就是将在 initialDelay
* 后开始执行，然后在 initialDelay+period 后执行，接着在 initialDelay + 2 * period 后执行，依此类推。
*/
scheduler.scheduleAtFixedRate(envent, initialDelay, period,
TimeUnit.MILLISECONDS);
}
/**
* inner class
* 打开 灯
*/
class LightOn implements Runnable
{
// put hardware control code here to把硬件控制代码在这里
// physically turn on the light. 身体开灯。
@Override
public void run()
{
//System.out.println("Turning on lights");
System.out.println("打开电灯");
light = true;
}
}
/**
* 关
* @author lenovo
*
*/
class LightOff implements Runnable
{
// put hardware control code here to 把硬件控制代码在这里
// physically turn off the light. 身关灯。
@Override
public void run()
{
System.out.println("旋转 关灯 ");
// System.out.println("Turning off light");
water = true;
}
}
class WaterOn implements Runnable
{
@Override
public void run()
{
//System.out.println("Turning greenhouse water on");
System.out.println("温室水开");
water = true;
}
}
class WaterOff implements Runnable
{
@Override
public void run()
{
System.out.println("温室水关");
//System.out.println("Turning greenhouse water off");
water = false;
}
}
/**
* 控温器 夜晚
* @author lenovo
*
*/
class ThermostatNight implements Runnable
{
@Override
public void run()
{
// put hardware control code here 把硬件控制代码在这里
//System.out.println("thermostat to night setting");
System.out.println("自动控温器 夜晚设置");
setThermostat("Night");
}
}
/**
* 白天
* @author lenovo
*
*/
class ThernostatDay implements Runnable
{
@Override
public void run()
{
// put hardware control code here
System.out.println("温室白天 设置");
// System.out.println("thermostat to day setting");
setThermostat("Day");
}
}
/**
* 钟
* @author lenovo
*
*/
class Bell implements Runnable
{
@Override
public void run()
{
System.out.println("Bing!响铃>>");
}
}
/**
* 终止
* @author lenovo
*
*/
class Terminate implements Runnable
{
@Override
public void run()
{
System.out.println("Terminate》》结束");
scheduler.shutdown();
// must start a separate task to do this job 必须启动一个单独的任务来做这份工作
// since the scheduler has been shut down 自调度器已经关闭
new Thread()
{
public void run()
{
for (DataPoint d : data)
{
System.out.println("DataPoint:"+d);
}
};
}.start();
}
}
/**
* 可以持有并显示单个的数据段
* @author lenovo
*
*/
// inner class
static class DataPoint
{
final Calendar time;
final float temperature;
final float humidity;
/**
* @param time
* @param temperature
* @param humidity
*/
public DataPoint(Calendar time, float temperature, float humidity)
{
this.time = time;
this.temperature = temperature;
this.humidity = humidity;
}
public String toString()
{
DateFormat fd=new SimpleDateFormat("yyyy/MM/dd hh:mm ss");
return fd.format(time.getTime())
+ String.format("temperature:%1$.1f humidity:%2$.2f",
temperature, humidity);
}
}
// //
private Calendar lastTime = Calendar.getInstance();
{
// adjust data to the half hour 调整数据到半个小时
lastTime.set(Calendar.MINUTE, 30);
lastTime.set(Calendar.SECOND, 00);
}
private float lastTemp = 65.0f;//
private int tempDirection = +1;//温度 方位
private float lastHumidity = 50.0f;//最后的 湿度
private int humidityDirection = +1;//湿气 方位
private Random rand = new Random(47);
List data = Collections
.synchronizedList(new ArrayList());
//被调度的任务，它在每次运行时，都可以产生仿真数据，并将其添加到Greenhouse的list中
// ineer class
class CollectData implements Runnable
{
@Override
public void run()
{
System.out.println("CollectData》》》run");
synchronized (GreenhouseScheduler.this)
{
// pretend the interval is longer than it is: 假装间隔时间比是:
lastTime.set(Calendar.MINUTE,
lastTime.get(Calendar.MINUTE) + 30);
// one in 5 chances of reversing the direction:一个在5 扭转方向的机会:
if (rand.nextInt(5) == 4)
{
tempDirection = -tempDirection;// 方向
}
// store previous value: 店前一个值:
lastTemp = lastTemp + tempDirection * (1.0f + rand.nextFloat());
if (rand.nextInt(5) == 4)
{
humidityDirection = -humidityDirection;
}
lastHumidity = lastHumidity + humidityDirection
* rand.nextFloat();
// calendar must be cloned , otherwise all
// dataPoints hold references to the same lastTime.
// for a basic object like calendar,clone() is ok.
data.add(new DataPoint((Calendar) lastTime.clone(), lastTemp,
lastHumidity));
}
}
}
// //////////////main
public static void main(String[] args)
{
GreenhouseScheduler gh = new GreenhouseScheduler();
//延迟多少时间 关闭
gh.scheduler(gh.new Terminate(), 5000);
// former restart class not necessary:前重启类没有必要:
gh.repeat(gh.new Bell(), 0, 1000);//响铃
gh.repeat(gh.new ThermostatNight(), 0, 2000);//夜晚 2秒执行
gh.repeat(gh.new LightOn(), 0, 200);//灯
gh.repeat(gh.new LightOff(), 0, 400);
gh.repeat(gh.new WaterOn(), 0, 600);//水
gh.repeat(gh.new WaterOff(), 0, 800);
//
gh.repeat(gh.new ThernostatDay(), 0, 1400);//白天
gh.repeat(gh.new CollectData(), 500, 500);
}
}
/***
* output:
* Bing!响铃>>
自动控温器 夜晚设置
打开电灯
旋转 关灯
温室水开
温室水关
温室白天 设置
打开电灯
打开电灯
旋转 关灯
CollectData》》》run
温室水开
打开电灯
打开电灯
旋转 关灯
温室水关
Bing!响铃>>
打开电灯
CollectData》》》run
打开电灯
温室水开
旋转 关灯
打开电灯
温室白天 设置
CollectData》》》run
打开电灯
温室水关
旋转 关灯
打开电灯
温室水开
Bing!响铃>>
CollectData》》》run
旋转 关灯
打开电灯
自动控温器 夜晚设置
打开电灯
打开电灯
旋转 关灯
温室水开
温室水关
CollectData》》》run
打开电灯
打开电灯
旋转 关灯
温室白天 设置
打开电灯
CollectData》》》run
温室水开
Bing!响铃>>
旋转 关灯
温室水关
打开电灯
打开电灯
CollectData》》》run
旋转 关灯
温室水开
打开电灯
打开电灯
Bing!响铃>>
自动控温器 夜晚设置
旋转 关灯
温室水关
CollectData》》》run
打开电灯
打开电灯
温室水开
温室白天 设置
打开电灯
旋转 关灯
CollectData》》》run
打开电灯
打开电灯
温室水关
温室水开
旋转 关灯
Bing!响铃>>
打开电灯
CollectData》》》run
Terminate》》结束
DataPoint:2015/07/19 09:00 00temperature:66.4 humidity:50.05
DataPoint:2015/07/19 09:30 00temperature:68.0 humidity:50.47
DataPoint:2015/07/19 10:00 00temperature:69.7 humidity:51.42
DataPoint:2015/07/19 10:30 00temperature:70.8 humidity:50.87
DataPoint:2015/07/19 11:00 00temperature:72.0 humidity:50.32
DataPoint:2015/07/19 11:30 00temperature:73.2 humidity:49.92
DataPoint:2015/07/20 12:00 00temperature:71.9 humidity:49.81
DataPoint:2015/07/20 12:30 00temperature:70.1 humidity:50.25
DataPoint:2015/07/20 01:00 00temperature:68.9 humidity:51.00
DataPoint:2015/07/20 01:30 00temperature:67.7 humidity:50.21
*/
作者：liangrui1988 发表于2015/7/19 20:26:22 原文链接
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