content: /*
   * Copyright (C) 2018 The Android Open Source Project
   *
   * 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 com.android.server.job.controllers.idle;
  
  import android.content.Context;
  
  import java.io.PrintWriter;
  
  public interface IdlenessTracker {
      /**
       * One-time initialization:  this method is called once, after construction of
       * the IdlenessTracker instance.  This is when the tracker should actually begin
       * monitoring whatever signals it consumes in deciding when the device is in a
       * non-interacting state.  When the idle state changes thereafter, the given
       * listener must be called to report the new state.
       */
      void startTracking(Context context, IdlenessListener listener);
  
      /**
       * Report whether the device is currently considered "idle" for purposes of
       * running scheduled jobs with idleness constraints.
       *
       * @return {@code true} if the job scheduler should consider idleness
       * constraints to be currently satisfied; {@code false} otherwise.
       */
      boolean isIdle();
  
      /**
       * Dump useful information about tracked idleness-related state in plaintext.
       */
      void dump(PrintWriter pw);
  }
  