学习进度笔记23
模拟器代码
import java.io.{PrintWriter}
import java.net.ServerSocket
import scala.io.Source
object StreamingSimulation {
// 定义随机获取整数的方法
def index(length: Int) = {
import java.util.Random
val rdm = new Random
rdm.nextInt(length)
}
def main(args: Array[String]) {
// 调用该模拟器需要三个参数，分为为文件路径、端口号和间隔时间（单位：毫秒）
if (args.length != 3) {
System.err.println("Usage: <filename> <port> <millisecond>")
System.exit(1)
}
// 获取指定文件总的行数
val filename = args(0)
val lines = Source.fromFile(filename).getLines.toList
val filerow = lines.length
// 指定监听某端口，当外部程序请求时建立连接
val listener = new ServerSocket(args(1).toInt)
while (true) {
val socket = listener.accept()
new Thread() {
override def run = {
println("Got client connected from: " + socket.getInetAddress)
val out = new PrintWriter(socket.getOutputStream(), true)
while (true) {
Thread.sleep(args(2).toLong)
// 当该端口接受请求时，随机获取某行数据发送给对方
val content = lines(index(filerow))
println(content)
out.write(content + ' ')
out.flush()
}
socket.close()
}
}.start()
}
}
}