| /* |
| * Copyright 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 androidx.work.impl.utils.taskexecutor; |
| |
| import android.support.annotation.Nullable; |
| import android.support.annotation.RestrictTo; |
| |
| /** |
| * A static class that serves as a central point to execute common tasks in WorkManager. |
| * This is used for business logic internal to WorkManager and NOT for worker processing. |
| * Adapted from {@link android.arch.core.executor.ArchTaskExecutor} |
| * @hide |
| */ |
| |
| @RestrictTo(RestrictTo.Scope.LIBRARY_GROUP) |
| public class WorkManagerTaskExecutor implements TaskExecutor { |
| private static WorkManagerTaskExecutor sInstance; |
| private final TaskExecutor mDefaultTaskExecutor = new DefaultTaskExecutor(); |
| private TaskExecutor mTaskExecutor = mDefaultTaskExecutor; |
| |
| /** |
| * Returns an instance of the task executor. |
| * @return The singleton WorkManagerTaskExecutor. |
| */ |
| public static synchronized WorkManagerTaskExecutor getInstance() { |
| if (sInstance == null) { |
| sInstance = new WorkManagerTaskExecutor(); |
| } |
| return sInstance; |
| } |
| |
| private WorkManagerTaskExecutor() { |
| } |
| |
| void setTaskExecutor(@Nullable TaskExecutor taskExecutor) { |
| mTaskExecutor = taskExecutor == null ? mDefaultTaskExecutor : taskExecutor; |
| } |
| |
| @Override |
| public void postToMainThread(Runnable r) { |
| mTaskExecutor.postToMainThread(r); |
| } |
| |
| @Override |
| public void executeOnBackgroundThread(Runnable r) { |
| mTaskExecutor.executeOnBackgroundThread(r); |
| } |
| } |