/*
 * Copyright 2001-2008 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.tools

import org.scalatest._
import java.util.concurrent.Executors
import java.util.concurrent.ExecutorService
import java.util.concurrent.LinkedBlockingQueue
import java.util.concurrent.Future

/**
 * This Distributor can be used by multiple threads.
 *
 * @author Bill Venners
 */
private[scalatest] class ConcurrentDistributor(dispatchReporter: DispatchReporter, stopper: Stopper, filter: Filter,
    configMap: Map[String, Any], execSvc: ExecutorService) extends Distributor {

  private val futureQueue = new LinkedBlockingQueue[Future[T] forSome { type T }]

  def apply(suite: Suite, tracker: Tracker) {
    val suiteRunner = new SuiteRunner(suite, dispatchReporter, stopper, filter, configMap, Some(this), tracker)
    val future: Future[_] = execSvc.submit(suiteRunner)
    futureQueue.put(future)
  }

  def poll() = None

  def waitUntilDone() {
    while (futureQueue.peek != null)
      futureQueue.poll().get()
  }
}

