threadLocal的試用

package com.zwy.myThread;


import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
/*TradLocal這個類很有意思,這個類會把當前的執行緒和當前類放入的資料形成一一對應的關係.
這個一一對應關係的維護已經由類來幫我們維護了.
比如:執行緒1,在threadLocal放入了 data1
    執行緒2,在threadLocal中亂入了data2
    執行緒1從thradLocal中取出來的資料就是data1
    執行緒2從threadLocal中取出來的資料就是data2
    hibernate在獲取資料庫的連線的時候必須使得同一個執行緒獲取的的連線是一樣的,試用的就是threadLocal
 */
public class ThreadLocalTest {


	public static void main(String[] args) {
		// TODO Auto-generated method stub		
		ExecutorService service = Executors.newFixedThreadPool(2);
		Runnable run = new Runnable(){
			public void run(){
                //執行緒放入資料
				myPool.setConnect(Thread.currentThread().getName());
				//myPool.setsPool(Math.random()*1000);
                //執行緒取出資料
				new runA().out();
				new runB().out();
				//new runA().out2();
				//new runB().out2();
			}
		};
		service.execute(run);
		service.execute(run);
	}


}
class myPool{
	private static ThreadLocal<String> connnectPool = new ThreadLocal<String>();
	private static ThreadLocal sPool = new ThreadLocal();
	public static String getConnect(){
		
		return	connnectPool.get();		
		//return connect;
		
	}
	public static void setConnect(String con){
		connnectPool.set(con);		
		return ;	
	}
	public static double getsPool(){		
		return	(Double)sPool.get();		
		//return connect;
		
	}
	public static void setsPool(double d){
		sPool.set(d);		
		return ;	
	}
}
class runA{
	public void out(){
		System.out.println(Thread.currentThread().getName()+": runA connect " + myPool.getConnect());
	}
	public void out2(){
		System.out.println(Thread.currentThread().getName()+": runA connect " + myPool.getsPool());
	}
}
class runB{
	public void out(){
		System.out.println(Thread.currentThread().getName()+": runB connect " + myPool.getConnect());
	}
	public void out2(){
		System.out.println(Thread.currentThread().getName()+": runB connect " + myPool.getsPool());
	}
}