/*
 * 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.texera.amber.engine.architecture.worker.promisehandlers

import com.twitter.util.Future
import org.apache.texera.amber.engine.architecture.rpc.controlcommands.{
  AsyncRPCContext,
  EmptyRequest
}
import org.apache.texera.amber.engine.architecture.rpc.controlreturns.WorkerStateResponse
import org.apache.texera.amber.engine.architecture.worker.statistics.WorkerState.{PAUSED, RUNNING}
import org.apache.texera.amber.engine.architecture.worker.{
  DataProcessorRPCHandlerInitializer,
  UserPause
}

trait ResumeHandler {
  this: DataProcessorRPCHandlerInitializer =>

  override def resumeWorker(
      request: EmptyRequest,
      ctx: AsyncRPCContext
  ): Future[WorkerStateResponse] = {
    if (dp.stateManager.getCurrentState == PAUSED) {
      dp.pauseManager.resume(UserPause)
      dp.stateManager.transitTo(RUNNING)
      dp.adaptiveBatchingMonitor.resumeAdaptiveBatching()
    }
    WorkerStateResponse(dp.stateManager.getCurrentState)
  }

}
