| /* |
| * 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 android.util; |
| |
| import android.os.IStatsManager; |
| import android.os.RemoteException; |
| import android.os.ServiceManager; |
| |
| /** |
| * StatsLog provides an API for developers to send events to statsd. The events can be used to |
| * define custom metrics inside statsd. |
| */ |
| public final class StatsLog extends StatsLogInternal { |
| private static final String TAG = "StatsLog"; |
| private static final boolean DEBUG = false; |
| |
| private static IStatsManager sService; |
| |
| private StatsLog() {} |
| |
| /** |
| * Logs a start event. |
| * |
| * @param label developer-chosen label. |
| * @return True if the log request was sent to statsd. |
| */ |
| public static boolean logStart(int label) { |
| synchronized (StatsLog.class) { |
| try { |
| IStatsManager service = getIStatsManagerLocked(); |
| if (service == null) { |
| if (DEBUG) Slog.d(TAG, "Failed to find statsd when logging start"); |
| return false; |
| } |
| service.sendAppBreadcrumbAtom(label, |
| StatsLog.APP_BREADCRUMB_REPORTED__STATE__START); |
| return true; |
| } catch (RemoteException e) { |
| sService = null; |
| if (DEBUG) Slog.d(TAG, "Failed to connect to statsd when logging start"); |
| return false; |
| } |
| } |
| } |
| |
| /** |
| * Logs a stop event. |
| * |
| * @param label developer-chosen label. |
| * @return True if the log request was sent to statsd. |
| */ |
| public static boolean logStop(int label) { |
| synchronized (StatsLog.class) { |
| try { |
| IStatsManager service = getIStatsManagerLocked(); |
| if (service == null) { |
| if (DEBUG) Slog.d(TAG, "Failed to find statsd when logging stop"); |
| return false; |
| } |
| service.sendAppBreadcrumbAtom(label, StatsLog.APP_BREADCRUMB_REPORTED__STATE__STOP); |
| return true; |
| } catch (RemoteException e) { |
| sService = null; |
| if (DEBUG) Slog.d(TAG, "Failed to connect to statsd when logging stop"); |
| return false; |
| } |
| } |
| } |
| |
| /** |
| * Logs an event that does not represent a start or stop boundary. |
| * |
| * @param label developer-chosen label. |
| * @return True if the log request was sent to statsd. |
| */ |
| public static boolean logEvent(int label) { |
| synchronized (StatsLog.class) { |
| try { |
| IStatsManager service = getIStatsManagerLocked(); |
| if (service == null) { |
| if (DEBUG) Slog.d(TAG, "Failed to find statsd when logging event"); |
| return false; |
| } |
| service.sendAppBreadcrumbAtom( |
| label, StatsLog.APP_BREADCRUMB_REPORTED__STATE__UNSPECIFIED); |
| return true; |
| } catch (RemoteException e) { |
| sService = null; |
| if (DEBUG) Slog.d(TAG, "Failed to connect to statsd when logging event"); |
| return false; |
| } |
| } |
| } |
| |
| private static IStatsManager getIStatsManagerLocked() throws RemoteException { |
| if (sService != null) { |
| return sService; |
| } |
| sService = IStatsManager.Stub.asInterface(ServiceManager.getService("stats")); |
| return sService; |
| } |
| } |