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/*
* 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;
}
}
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