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      1 /*
      2  * Copyright (C) 2015 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 package com.google.android.car.kitchensink.job;
     17 
     18 import android.app.job.JobParameters;
     19 import android.app.job.JobService;
     20 import android.os.AsyncTask;
     21 import android.os.Handler;
     22 import android.os.Message;
     23 import android.util.Log;
     24 import android.util.SparseArray;
     25 
     26 import java.lang.ref.WeakReference;
     27 
     28 public class DishService extends JobService {
     29     private static final String TAG = "JobScheduler_DishService";
     30     private static final int DELAY_MS = 1000; // wash a plate every second!
     31 
     32     private static final int MSG_FINISHED = 0;
     33     private static final int MSG_RUN_JOB = 1;
     34     private static final int MSG_CANCEL_JOB = 2;
     35 
     36     public static final String EXTRA_DISH_COUNT = "dish_count";
     37 
     38     private final Handler mHandler = new Handler() {
     39         private SparseArray<JobParameters> mTaskMap = new SparseArray<JobParameters>();
     40         @Override
     41         public void handleMessage(Message msg) {
     42             JobParameters job = (JobParameters) msg.obj;
     43             switch (msg.what) {
     44                 case MSG_FINISHED:
     45                     Log.d(TAG, "Job done! " + job.getJobId());
     46                     mTaskMap.remove(job.getJobId());
     47                     jobFinished(job, false);
     48                     break;
     49                 case MSG_RUN_JOB:
     50                     DishWasherTask task = new DishWasherTask(this, job, msg.arg1);
     51                     task.execute();
     52                     mTaskMap.put(job.getJobId(), job);
     53                     break;
     54                 case MSG_CANCEL_JOB:
     55                     JobParameters job1 = mTaskMap.get(job.getJobId());
     56                     if (job1 != null) {
     57                         removeMessages(MSG_RUN_JOB, job1);
     58                         Log.d(TAG, "cancelled job " + job1);
     59                         mTaskMap.remove(job.getJobId());
     60                     }
     61                     break;
     62                 default:
     63                     Log.w(TAG, "Unknown message " + msg.what);
     64             }
     65         }
     66     };
     67 
     68     @Override
     69     public boolean onStopJob(JobParameters jobParameters) {
     70         Log.d(TAG, "onStopJob " + jobParameters);
     71         Message msg = mHandler.obtainMessage(MSG_CANCEL_JOB, 0, 0, jobParameters);
     72         mHandler.sendMessage(msg);
     73         return false;
     74     }
     75 
     76     @Override
     77     public boolean onStartJob(final JobParameters jobParameters) {
     78         Log.d(TAG, "onStartJob " + jobParameters);
     79         Message msg = mHandler.obtainMessage(MSG_RUN_JOB, 0, 0, jobParameters);
     80         mHandler.sendMessage(msg);
     81         return true;
     82     }
     83 
     84     private static final class DishWasherTask extends AsyncTask<Void, Void, Boolean> {
     85         private final WeakReference<Handler> mHandler;
     86         private final JobParameters mJobParameter;
     87         private final int mMyDishNum;
     88 
     89 
     90         public DishWasherTask(Handler handler, JobParameters jobParameters, int dishNum) {
     91             mHandler = new WeakReference<Handler>(handler);
     92             mJobParameter = jobParameters;
     93             mMyDishNum = dishNum;
     94         }
     95 
     96         @Override
     97         protected Boolean doInBackground(Void... infos) {
     98             int dishTotal = mJobParameter.getExtras().getInt(EXTRA_DISH_COUNT);
     99 
    100             Log.d(TAG, "jobId: " + mJobParameter.getJobId() + " totalDish: " + dishTotal
    101                     + " washing: #" + mMyDishNum);
    102             wash();
    103             if (mMyDishNum >= dishTotal - 1) {
    104                 // all done!
    105                 return false;
    106             }
    107             return true;
    108         }
    109 
    110         @Override
    111         protected void onPostExecute(Boolean result) {
    112             if (mHandler.get() == null) {
    113                 return;
    114             }
    115             if (result) {
    116                 Message msg = mHandler.get().obtainMessage(MSG_RUN_JOB,
    117                         mMyDishNum +1, 0, mJobParameter);
    118                 mHandler.get().sendMessageDelayed(msg, DELAY_MS);
    119             } else {
    120                 Message msg = mHandler.get().obtainMessage(MSG_FINISHED, 0,
    121                         0, mJobParameter);
    122                 mHandler.get().sendMessage(msg);
    123             }
    124         }
    125 
    126         private void wash() {
    127             // TODO: add heavy wash tasks here...
    128         }
    129     }
    130 }
    131