pekko/akka-actor/src/main/scala/akka/AkkaException.scala

/**
 * Copyright (C) 2009-2011 Scalable Solutions AB <http://scalablesolutions.se>
 */

package akka

import akka.actor.newUuid
import java.net.{InetAddress, UnknownHostException}

/**
 * Akka base Exception. Each Exception gets:
 * <ul>
 *   <li>a uuid for tracking purposes</li>
 *   <li>toString that includes exception name, message, uuid, and the stacktrace</li>
 * </ul>
 *
 * @author <a href="http://jonasboner.com">Jonas Bon&#233;r</a>
 */
class AkkaException(message: String = "") extends RuntimeException(message) with Serializable {
  val uuid = "%s_%s".format(AkkaException.hostname, newUuid)

  override lazy val toString = {
    val name = getClass.getName
    val trace = stackTraceToString
    "%s: %s\n[%s]\n%s".format(name, message, uuid, trace)
  }

  def stackTraceToString = {
    val trace = getStackTrace
    val sb = new StringBuffer
    for (i <- 0 until trace.length)
      sb.append("\tat %s\n" format trace(i))   
    sb.toString
  }
}

object AkkaException {
  val hostname = try {
    InetAddress.getLocalHost.getHostName
  } catch {
    case e: UnknownHostException => "unknown"
  }
}