Scala example source code file (SocketConnection.scala)

This example Scala source code file (SocketConnection.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Scala tags/keywords

bufferedreader, bufferedreader, couldn't, don't, i/o, int, int, io, ioexception, net, network, printwriter, socket, socket, string, string, unknownhostexception

The Scala SocketConnection.scala source code

/*                     __                                               *\
**     ________ ___   / /  ___     Scala API                            **
**    / __/ __// _ | / /  / _ |    (c) 2002-2011, LAMP/EPFL             **
**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
** /____/\___/_/ |_/____/_/ | |                                         **
**                          |/                                          **
\*                                                                      */


package scala.tools.util

import java.io.{PrintWriter, InputStreamReader, BufferedReader}
import java.io.IOException
import java.net.{Socket, InetAddress}
import java.net.UnknownHostException

/** This class implements the connection to the server.
 *
 *  @author Martin Odersky
 *  @version 1.0
 */
class SocketConnection(hostname: String, port: Int) {

  def this(port: Int) = this(InetAddress.getLocalHost().getHostName(), port)

  private var socket: Socket = _
  var out: PrintWriter = _
  var in: BufferedReader = _
  var errorMessage: String = _

  def open(): Boolean = {
    try {
      socket = new Socket(hostname, port)
      out = new PrintWriter(socket.getOutputStream(), true)
      in = new BufferedReader(new InputStreamReader(socket.getInputStream()))
      true
    } catch {
      case e: UnknownHostException =>
        errorMessage = "Don't know about host: " + hostname + "."
        false
      case e: IOException =>
        errorMessage = "Couldn't get I/O for the connection to: " + hostname + "."
        false
    }
  }

  def close() {
    in.close()
    out.close()
    socket.close()
  }
}