org.scalatest.concurrent.Interruptor.scala Maven / Gradle / Ivy

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ScalaTest is a free, open-source testing toolkit for Scala and Java programmers.

There is a newer version: 2.0.M6-SNAP4

/*
 * Copyright 2001-2012 Artima, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.scalatest.concurrent

/**
 * Strategy for interrupting an operation after a timeout expires.
 *
 * 
 * An instance of this trait is used for configuration when using traits
 * Timeouts and TimeLimitedTests.
 * 
 */
trait Interruptor extends Function1[Thread, Unit] { thisInterruptor =>

  /**
   * Interrupts an operation.
   *
   * 
   * This method may do anything to attempt to interrupt an operation, or even do nothing.
   * When called by failAfter method of trait Timeouts, the passed
   * Thread will represent the main test thread. This Thread is
   * passed in case it is useful, but need not be used by implementations of this method.
   * 
   */
  def apply(testThread: Thread): Unit

/*
  override def compose[U](g: U => Thread): Interruptor =
    new Interruptor {
      def apply(u: U) = thisInterruptor.apply(g(u))
    }
*/
}

/**
 * Companion object that provides a factory method for an Interruptor defined
 * in terms of a function from a function of type Thread to Unit.
 */
object Interruptor {

  /**
   * Factory method for an Interruptor defined in terms of a function from a function of
   * type Thread to Unit.
   *
   * When this apply method is invoked, it will invoke the passed function's apply
   * method, forwarding along the passed Thread.
   *
   * @param fun the function representing the interruption strategy
   */
  def apply(fun: Thread => Unit) =
    new Interruptor {
      def apply(testThread: Thread) { fun(testThread) }
    }
}