moderator.java

来自「利用多线程从搜索引擎下载网页并提取数据到数据库。」· Java 代码 · 共 71 行

JAVA
71
字号
import java.util.Date;
import java.util.Queue;
import java.util.LinkedList;

public class Moderator {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub

	}

	public static float maxSpeed;
	public static float minInterval;
	
	private  static float currentSpeed;
	private static Date lastConnection=new Date();
	
	//private static Queue<Date> connections=new LinkedList<Date>();

	public Moderator(float speed,float interval) {
		maxSpeed = speed;
		minInterval=interval;
	}	
	public static synchronized void getQuota() {
		
		refreshSpeed();
		while (currentSpeed > maxSpeed) {
			try {
				Thread.sleep(1000);
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		//return true;
	}

	private static void refreshSpeed() {
		
		
		
	}
	
	public static synchronized void ensureInterval() {
		
		long interval;
		interval=new Date().getTime()-lastConnection.getTime();
		
		if (interval < minInterval*1000) {
			try {
			//	Thread.sleep((long)(minInterval*1000)-interval +(long)(Util.getARand()*100));
				Thread.sleep((long)(minInterval*1000)-interval );
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		
		lastConnection=new Date();
		//return true;
	}


	
	
	
}

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