package com.coderising.download;
import java.io.RandomAccessFile;
import java.util.concurrent.CyclicBarrier;
import com.coderising.download.api.Connection;
public class DownloadThread extends Thread{
Connection conn;
int startPos;
int endPos;
CyclicBarrier barrier;
String localFile;
public DownloadThread( Connection conn, int startPos, int endPos, String localFile, CyclicBarrier barrier){
this.conn = conn;
this.startPos = startPos;
this.endPos = endPos;
this.localFile = localFile;
this.barrier = barrier;
}
public void run(){
try {
System.out.println("Begin to read [" + startPos +"-"+endPos+"]");
//调用read
byte[] data = conn.read(startPos, endPos);
RandomAccessFile file = new RandomAccessFile(localFile,"rw");
//类似指针指到开始处
file.seek(startPos);
//把数据写入
file.write(data);
file.close();
conn.close();
barrier.await(); //等待别的线程完成
} catch (Exception e) {
e.printStackTrace();
}
}
}