renamed akka-actor to akka-core

akka-core/src/main/scala/stm/ResultOrFailure.scala

@@ -0,0 +1,60 @@
+/**
+ * Copyright (C) 2009 Scalable Solutions.
+ */
+
+package se.scalablesolutions.akka.util
+
+import stm.Transaction
+
+/**
+ * Reference that can hold either a typed value or an exception.
+ *
+ * Usage:
+ * <pre>
+ * scala> ResultOrFailure(1)
+ * res0: ResultOrFailure[Int] = ResultOrFailure@a96606
+ *  
+ * scala> res0()
+ * res1: Int = 1
+ *
+ * scala> res0() = 3
+ *
+ * scala> res0()
+ * res3: Int = 3
+ * 
+ * scala> res0() = { println("Hello world"); 3}
+ * Hello world
+ *
+ * scala> res0()
+ * res5: Int = 3
+ *  
+ * scala> res0() = error("Lets see what happens here...")
+ *
+ * scala> res0()
+ * java.lang.RuntimeException: Lets see what happens here...
+ * 	at ResultOrFailure.apply(RefExcept.scala:11)
+ * 	at .<init>(<console>:6)
+ * 	at .<clinit>(<console>)
+ * 	at Re...
+ * </pre>
+ *
+ * @author <a href="http://jonasboner.com">Jonas Bon&#233;r</a>
+ */
+class ResultOrFailure[Payload](payload: Payload, val tx: Option[Transaction]) {
+  private[this] var contents: Either[Throwable, Payload] = Right(payload)
+
+  def update(value: => Payload) = {
+    contents = try { Right(value) } catch { case (e : Throwable) => Left(e) }
+  }
+
+  def apply() = contents match {
+    case Right(payload) => payload
+    case Left(e) => throw e
+  }
+
+  override def toString(): String = "ResultOrFailure[" + contents + "]"
+}
+object ResultOrFailure {
+  def apply[Payload](payload: Payload, tx: Option[Transaction]) = new ResultOrFailure(payload, tx)
+  def apply[AnyRef](tx: Option[Transaction]) = new ResultOrFailure(new Object, tx)
+}