Trackers.java
/*
* Copyright (C) 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.constraints.trackers;
import android.content.Context;
import androidx.annotation.NonNull;
import androidx.annotation.RestrictTo;
import androidx.annotation.VisibleForTesting;
import androidx.work.impl.utils.taskexecutor.TaskExecutor;
/**
* A singleton class to hold an instance of each {@link ConstraintTracker}.
* @hide
*/
@RestrictTo(RestrictTo.Scope.LIBRARY_GROUP)
public class Trackers {
private static Trackers sInstance;
/**
* Gets the singleton instance of {@link Trackers}.
*
* @param context The initializing context (we only use the application context)
* @return The singleton instance of {@link Trackers}.
*/
@NonNull
public static synchronized Trackers getInstance(Context context, TaskExecutor taskExecutor) {
if (sInstance == null) {
sInstance = new Trackers(context, taskExecutor);
}
return sInstance;
}
/**
* Sets an instance of the {@link Trackers} for testing.
*/
@VisibleForTesting
public static synchronized void setInstance(@NonNull Trackers trackers) {
sInstance = trackers;
}
private BatteryChargingTracker mBatteryChargingTracker;
private BatteryNotLowTracker mBatteryNotLowTracker;
private NetworkStateTracker mNetworkStateTracker;
private StorageNotLowTracker mStorageNotLowTracker;
private Trackers(@NonNull Context context, @NonNull TaskExecutor taskExecutor) {
Context appContext = context.getApplicationContext();
mBatteryChargingTracker = new BatteryChargingTracker(appContext, taskExecutor);
mBatteryNotLowTracker = new BatteryNotLowTracker(appContext, taskExecutor);
mNetworkStateTracker = new NetworkStateTracker(appContext, taskExecutor);
mStorageNotLowTracker = new StorageNotLowTracker(appContext, taskExecutor);
}
/**
* Gets the tracker used to track the battery charging status.
*
* @return The tracker used to track battery charging status
*/
@NonNull
public BatteryChargingTracker getBatteryChargingTracker() {
return mBatteryChargingTracker;
}
/**
* Gets the tracker used to track if the battery is okay or low.
*
* @return The tracker used to track if the battery is okay or low
*/
@NonNull
public BatteryNotLowTracker getBatteryNotLowTracker() {
return mBatteryNotLowTracker;
}
/**
* Gets the tracker used to track network state changes.
*
* @return The tracker used to track state of the network
*/
@NonNull
public NetworkStateTracker getNetworkStateTracker() {
return mNetworkStateTracker;
}
/**
* Gets the tracker used to track if device storage is okay or low.
*
* @return The tracker used to track if device storage is okay or low.
*/
@NonNull
public StorageNotLowTracker getStorageNotLowTracker() {
return mStorageNotLowTracker;
}
}