| /* |
| * Copyright 2019 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 androidx.work.impl.background.greedy; |
| |
| import androidx.annotation.NonNull; |
| import androidx.annotation.RestrictTo; |
| import androidx.work.Logger; |
| import androidx.work.RunnableScheduler; |
| import androidx.work.impl.model.WorkSpec; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| |
| /** |
| * Keeps track of {@link androidx.work.WorkRequest}s that have a timing component in a |
| * {@link GreedyScheduler}. |
| * |
| */ |
| @RestrictTo(RestrictTo.Scope.LIBRARY_GROUP) |
| public class DelayedWorkTracker { |
| |
| // Synthetic access |
| @SuppressWarnings("WeakerAccess") |
| static final String TAG = Logger.tagWithPrefix("DelayedWorkTracker"); |
| |
| // Synthetic access |
| @SuppressWarnings("WeakerAccess") |
| final GreedyScheduler mGreedyScheduler; |
| |
| private final RunnableScheduler mRunnableScheduler; |
| private final Map<String, Runnable> mRunnables; |
| |
| public DelayedWorkTracker( |
| @NonNull GreedyScheduler scheduler, |
| @NonNull RunnableScheduler runnableScheduler) { |
| |
| mGreedyScheduler = scheduler; |
| mRunnableScheduler = runnableScheduler; |
| mRunnables = new HashMap<>(); |
| } |
| |
| /** |
| * Cancels the existing instance of a {@link Runnable} if any, and schedules a new |
| * {@link Runnable}; which eventually calls {@link GreedyScheduler#schedule(WorkSpec...)} at |
| * the {@link WorkSpec}'s scheduled run time. |
| * |
| * @param workSpec The {@link WorkSpec} corresponding to the {@link androidx.work.WorkRequest} |
| * @param nextRunTime time when work should be executed |
| */ |
| public void schedule(@NonNull final WorkSpec workSpec, long nextRunTime) { |
| Runnable existing = mRunnables.remove(workSpec.id); |
| if (existing != null) { |
| mRunnableScheduler.cancel(existing); |
| } |
| |
| Runnable runnable = new Runnable() { |
| @Override |
| public void run() { |
| Logger.get().debug(TAG, "Scheduling work " + workSpec.id); |
| mGreedyScheduler.schedule(workSpec); |
| } |
| }; |
| |
| mRunnables.put(workSpec.id, runnable); |
| long now = System.currentTimeMillis(); |
| long delay = nextRunTime - now; |
| mRunnableScheduler.scheduleWithDelay(delay, runnable); |
| } |
| |
| /** |
| * Cancels the existing instance of a {@link Runnable} if any. |
| * |
| * @param workSpecId The {@link androidx.work.WorkRequest} id |
| */ |
| public void unschedule(@NonNull String workSpecId) { |
| Runnable runnable = mRunnables.remove(workSpecId); |
| if (runnable != null) { |
| mRunnableScheduler.cancel(runnable); |
| } |
| } |
| } |
