content: /*
   * Copyright (C) 2017 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;
  
  import android.app.job.JobInfo;
  import android.app.job.JobParameters;
  import android.app.job.JobScheduler;
  import android.app.job.JobService;
  import android.content.ComponentName;
  import android.content.Context;
  import android.content.res.Resources;
  import android.os.Environment;
  import android.os.SystemProperties;
  import android.util.Slog;
  import android.util.TimeUtils;
  
  import com.android.internal.R;
  
  import java.util.concurrent.TimeUnit;
  
  /**
   * {@link JobService} that marks
   * {@link Environment#getDataPreloadsFileCacheDirectory() preloaded file cache} as expired after a
   * pre-configured timeout.
   */
  public class PreloadsFileCacheExpirationJobService extends JobService {
      private static final boolean DEBUG = false; // Do not submit with true
      private static final String TAG = "PreloadsFileCacheExpirationJobService";
  
      // TODO move all JOB_IDs into a single class to avoid collisions
      private static final int JOB_ID = 100500;
  
      private static final String PERSIST_SYS_PRELOADS_FILE_CACHE_EXPIRED
              = "persist.sys.preloads.file_cache_expired";
  
      public static void schedule(Context context) {
          int keepPreloadsMinDays = Resources.getSystem().getInteger(
                  R.integer.config_keepPreloadsMinDays); // Default is 1 week
          long keepPreloadsMinTimeoutMs = DEBUG ? TimeUnit.MINUTES.toMillis(2)
                  : TimeUnit.DAYS.toMillis(keepPreloadsMinDays);
          long keepPreloadsMaxTimeoutMs = DEBUG ? TimeUnit.MINUTES.toMillis(3)
                  : TimeUnit.DAYS.toMillis(keepPreloadsMinDays + 1);
  
          if (DEBUG) {
              StringBuilder sb = new StringBuilder("Scheduling expiration job to run in ");
              TimeUtils.formatDuration(keepPreloadsMinTimeoutMs, sb);
              Slog.i(TAG, sb.toString());
          }
          JobInfo expirationJob = new JobInfo.Builder(JOB_ID,
                  new ComponentName(context, PreloadsFileCacheExpirationJobService.class))
                  .setPersisted(true)
                  .setMinimumLatency(keepPreloadsMinTimeoutMs)
                  .setOverrideDeadline(keepPreloadsMaxTimeoutMs)
                  .build();
  
          JobScheduler jobScheduler = context.getSystemService(JobScheduler.class);
          jobScheduler.schedule(expirationJob);
      }
  
      @Override
      public boolean onStartJob(JobParameters params) {
          SystemProperties.set(PERSIST_SYS_PRELOADS_FILE_CACHE_EXPIRED, "1");
          Slog.i(TAG, "Set " + PERSIST_SYS_PRELOADS_FILE_CACHE_EXPIRED + "=1");
          return false;
      }
  
      @Override
      public boolean onStopJob(JobParameters params) {
          return false;
      }
  }
  