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/*
* 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);
}
}