1 /* 2 * Copyright 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.android.bluetooth.btservice; 17 18 import com.android.bluetooth.BluetoothMetricsProto.BluetoothLog; 19 import com.android.bluetooth.BluetoothMetricsProto.ProfileConnectionStats; 20 import com.android.bluetooth.BluetoothMetricsProto.ProfileId; 21 22 import java.util.HashMap; 23 24 /** 25 * Class with static methods for logging metrics data 26 */ 27 public class MetricsLogger { 28 private static final HashMap<ProfileId, Integer> sProfileConnectionCounts = new HashMap<>(); 29 30 /** 31 * Log profile connection event by incrementing an internal counter for that profile. 32 * This log persists over adapter enable/disable and only get cleared when metrics are 33 * dumped or when Bluetooth process is killed. 34 * 35 * @param profileId Bluetooth profile that is connected at this event 36 */ logProfileConnectionEvent(ProfileId profileId)37 public static void logProfileConnectionEvent(ProfileId profileId) { 38 synchronized (sProfileConnectionCounts) { 39 sProfileConnectionCounts.merge(profileId, 1, Integer::sum); 40 } 41 } 42 43 /** 44 * Dump collected metrics into proto using a builder. 45 * Clean up internal data after the dump. 46 * 47 * @param metricsBuilder proto builder for {@link BluetoothLog} 48 */ dumpProto(BluetoothLog.Builder metricsBuilder)49 public static void dumpProto(BluetoothLog.Builder metricsBuilder) { 50 synchronized (sProfileConnectionCounts) { 51 sProfileConnectionCounts.forEach( 52 (key, value) -> metricsBuilder.addProfileConnectionStats( 53 ProfileConnectionStats.newBuilder() 54 .setProfileId(key) 55 .setNumTimesConnected(value) 56 .build())); 57 sProfileConnectionCounts.clear(); 58 } 59 } 60 } 61