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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.flink.runtime.testingUtils

import akka.actor.ActorRef
import org.apache.flink.api.common.JobID
import org.apache.flink.runtime.deployment.TaskDeploymentDescriptor
import org.apache.flink.runtime.executiongraph.ExecutionAttemptID
import org.apache.flink.runtime.taskmanager.Task

/**
 * Additional messages that the [[TestingTaskManager]] understands.
 */
object TestingTaskManagerMessages {
  
  case class NotifyWhenTaskRemoved(executionID: ExecutionAttemptID)

  case class NotifyWhenTaskIsRunning(executionID: ExecutionAttemptID)
  
  case class ResponseRunningTasks(tasks: Map[ExecutionAttemptID, Task]){
    import collection.JavaConverters._
    def asJava: java.util.Map[ExecutionAttemptID, Task] = tasks.asJava
  }
  
  case class ResponseBroadcastVariablesWithReferences(number: Int)

  case object RequestNumActiveConnections
  case class ResponseNumActiveConnections(number: Int)
  
  case object RequestRunningTasks
  
  case object RequestBroadcastVariablesWithReferences

  case class NotifyWhenJobManagerTerminated(jobManager: ActorRef)

  case class JobManagerTerminated(jobManager: ActorRef)

  case class NotifyWhenRegisteredAtJobManager(resourceManager: ActorRef)

  /**
   * Message to give a hint to the task manager that accumulator values were updated in the task.
   * This message is forwarded to the job manager which knows that it needs to notify listeners
   * of accumulator updates.
   */
  case class AccumulatorsChanged(jobID: JobID)

  /**
    * Registers a listener for all [[org.apache.flink.runtime.messages.TaskMessages.SubmitTask]]
    * messages of the given job.
    *
    * If a task is submitted with the given job ID the task deployment
    * descriptor is forwarded to the listener.
    *
    * @param jobId The job ID to listen for.
    */
  case class RegisterSubmitTaskListener(jobId: JobID)

  /**
    * A response to a listened job ID containing the submitted task deployment descriptor.
    *
    * @param tdd The submitted task deployment descriptor.
    */
  case class ResponseSubmitTaskListener(tdd: TaskDeploymentDescriptor)

  // --------------------------------------------------------------------------
  // Utility methods to allow simpler case object access from Java
  // --------------------------------------------------------------------------
  
  def getRequestRunningTasksMessage: AnyRef = {
    RequestRunningTasks
  }
  
  def getRequestBroadcastVariablesWithReferencesMessage: AnyRef = {
    RequestBroadcastVariablesWithReferences
  }

}





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