WorkManagerTaskExecutor.java
/*
* 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.os.Handler;
import android.os.Looper;
import androidx.annotation.NonNull;
import androidx.annotation.RestrictTo;
import androidx.work.impl.utils.SerialExecutor;
import java.util.concurrent.Executor;
/**
* Default Task Executor for executing common tasks in WorkManager
* @hide
*/
@RestrictTo(RestrictTo.Scope.LIBRARY_GROUP)
public class WorkManagerTaskExecutor implements TaskExecutor {
private final SerialExecutor mBackgroundExecutor;
public WorkManagerTaskExecutor(@NonNull Executor backgroundExecutor) {
// Wrap it with a serial executor so we have ordering guarantees on commands
// being executed.
mBackgroundExecutor = new SerialExecutor(backgroundExecutor);
}
private final Handler mMainThreadHandler = new Handler(Looper.getMainLooper());
private final Executor mMainThreadExecutor = new Executor() {
@Override
public void execute(@NonNull Runnable command) {
postToMainThread(command);
}
};
@Override
public void postToMainThread(Runnable r) {
mMainThreadHandler.post(r);
}
@Override
public Executor getMainThreadExecutor() {
return mMainThreadExecutor;
}
@Override
public void executeOnBackgroundThread(Runnable r) {
mBackgroundExecutor.execute(r);
}
@Override
@NonNull
public SerialExecutor getBackgroundExecutor() {
return mBackgroundExecutor;
}
}