124 lines
3.7 KiB
Java
124 lines
3.7 KiB
Java
/*
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* Copyright (C) 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.os;
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import android.annotation.NonNull;
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import android.annotation.Nullable;
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import android.annotation.SystemApi;
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import android.annotation.SystemApi.Client;
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/**
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* Provides a way to register and obtain the system service binder objects managed by the stats
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* service.
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*
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* <p> Only the statsd mainline module will be able to access an instance of this class.
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* @hide
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*/
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@SystemApi(client = Client.MODULE_LIBRARIES)
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public class StatsServiceManager {
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/**
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* @hide
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*/
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public StatsServiceManager() {}
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/**
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* A class that exposes the methods to register and obtain each system service.
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*/
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public static final class ServiceRegisterer {
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private final String mServiceName;
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/**
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* @hide
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*/
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public ServiceRegisterer(String serviceName) {
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mServiceName = serviceName;
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}
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/**
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* Get the system server binding object for StatsManagerService.
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*
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* <p> This blocks until the service instance is ready.
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* or a timeout happens, in which case it returns null.
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*/
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@Nullable
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public IBinder get() {
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return ServiceManager.getService(mServiceName);
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}
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/**
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* Get the system server binding object for a service.
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*
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* <p>This blocks until the service instance is ready,
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* or a timeout happens, in which case it throws {@link ServiceNotFoundException}.
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*/
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@Nullable
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public IBinder getOrThrow() throws ServiceNotFoundException {
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try {
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return ServiceManager.getServiceOrThrow(mServiceName);
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} catch (ServiceManager.ServiceNotFoundException e) {
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throw new ServiceNotFoundException(mServiceName);
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}
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}
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/**
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* Get the system server binding object for a service. If the specified service is
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* not available, it returns null.
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*/
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@Nullable
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private IBinder tryGet() {
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return ServiceManager.checkService(mServiceName);
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}
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}
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/**
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* See {@link ServiceRegisterer#getOrThrow()}
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*/
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public static class ServiceNotFoundException extends ServiceManager.ServiceNotFoundException {
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/**
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* Constructor
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*
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* @param name the name of the binder service that cannot be found.
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*/
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public ServiceNotFoundException(@NonNull String name) {
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super(name);
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}
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}
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/**
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* Returns {@link ServiceRegisterer} for the "statscompanion" service.
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*/
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@NonNull
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public ServiceRegisterer getStatsCompanionServiceRegisterer() {
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return new ServiceRegisterer("statscompanion");
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}
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/**
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* Returns {@link ServiceRegisterer} for the "statsmanager" service.
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*/
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@NonNull
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public ServiceRegisterer getStatsManagerServiceRegisterer() {
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return new ServiceRegisterer("statsmanager");
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}
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/**
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* Returns {@link ServiceRegisterer} for the "statsd" service.
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*/
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@NonNull
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public ServiceRegisterer getStatsdServiceRegisterer() {
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return new ServiceRegisterer("stats");
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}
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}
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