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      1 /*
      2  * Copyright 2018 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 
     17 package androidx.work.impl.utils;
     18 
     19 import android.support.annotation.RestrictTo;
     20 
     21 import androidx.work.impl.WorkDatabase;
     22 import androidx.work.impl.WorkManagerImpl;
     23 import androidx.work.impl.model.WorkSpecDao;
     24 
     25 /**
     26  * A Runnable that prunes work in the background.  Pruned work meets the following criteria:
     27  * - Is finished (succeeded, failed, or cancelled)
     28  * - Has zero unfinished dependents
     29  *
     30  * @hide
     31  */
     32 @RestrictTo(RestrictTo.Scope.LIBRARY_GROUP)
     33 public class PruneWorkRunnable implements Runnable {
     34 
     35     private WorkManagerImpl mWorkManagerImpl;
     36 
     37     public PruneWorkRunnable(WorkManagerImpl workManagerImpl) {
     38         mWorkManagerImpl = workManagerImpl;
     39     }
     40 
     41     @Override
     42     public void run() {
     43         WorkDatabase workDatabase = mWorkManagerImpl.getWorkDatabase();
     44         WorkSpecDao workSpecDao = workDatabase.workSpecDao();
     45         workSpecDao.pruneFinishedWorkWithZeroDependentsIgnoringKeepForAtLeast();
     46     }
     47 }
     48