| /* |
| * Copyright (C) 2010 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 com.android.server.wifi; |
| |
| import android.annotation.IntDef; |
| import android.os.BatteryStatsManager; |
| import android.util.ArrayMap; |
| import android.util.Log; |
| |
| import java.lang.annotation.Retention; |
| import java.lang.annotation.RetentionPolicy; |
| import java.util.Map; |
| import java.util.concurrent.RejectedExecutionException; |
| |
| /** |
| * This class is used to track WifiState to update BatteryStats |
| */ |
| public class WifiStateTracker { |
| private static final String TAG = "WifiStateTracker"; |
| |
| @IntDef(value = { |
| INVALID, |
| SCAN_MODE, |
| DISCONNECTED, |
| CONNECTED, |
| SOFT_AP, |
| }) |
| @Retention(RetentionPolicy.SOURCE) |
| public @interface WifiStateTrackerState {} |
| |
| public static final int INVALID = -1; |
| public static final int SCAN_MODE = 1; // unused |
| public static final int DISCONNECTED = 2; |
| public static final int CONNECTED = 3; |
| public static final int SOFT_AP = 4; // unused |
| |
| /** |
| * String key: interface name |
| * int value: last wifi state, one of the {@link WifiStateTrackerState} values. |
| */ |
| private final Map<String, Integer> mIfaceToWifiState = new ArrayMap<>(); |
| private final BatteryStatsManager mBatteryStatsManager; |
| |
| public WifiStateTracker(BatteryStatsManager batteryStatsManager) { |
| mBatteryStatsManager = batteryStatsManager; |
| } |
| |
| @WifiStateTrackerState |
| private int mLastReportedState = INVALID; |
| |
| private void informWifiStateBatteryStats(@WifiStateTrackerState int state) { |
| if (state == mLastReportedState) { |
| return; |
| } |
| mLastReportedState = state; |
| |
| int batteryStatsState = internalToBatteryStatsWifiState(state); |
| if (batteryStatsState == INVALID) { |
| return; |
| } |
| |
| try { |
| mBatteryStatsManager.reportWifiState(batteryStatsState, null); |
| } catch (RejectedExecutionException e) { |
| Log.e(TAG, "Battery stats executor is being shutdown " + e.getMessage()); |
| } |
| } |
| |
| /** |
| * Reports the most active state among Wifi ifaces. e.g. Connected is more active than |
| * disconnected. |
| */ |
| @WifiStateTrackerState |
| private int getHighestPriorityState() { |
| int highest = INVALID; |
| for (int i : mIfaceToWifiState.values()) { |
| highest = Math.max(highest, i); |
| } |
| return highest; |
| } |
| |
| /** |
| * Inform the WifiState to this tracker to translate into the |
| * WifiState corresponding to BatteryStatsManager. |
| * @param ifaceName iface name whose state has changed |
| * @param state state corresponding to the ClientModeImpl state, one of the |
| * {@link WifiStateTrackerState} values. |
| */ |
| public void updateState(String ifaceName, @WifiStateTrackerState int state) { |
| mIfaceToWifiState.put(ifaceName, state); |
| int highestPriorityState = getHighestPriorityState(); |
| informWifiStateBatteryStats(highestPriorityState); |
| } |
| |
| private static int internalToBatteryStatsWifiState(@WifiStateTrackerState int internal) { |
| switch (internal) { |
| case SCAN_MODE: |
| return BatteryStatsManager.WIFI_STATE_OFF_SCANNING; |
| case DISCONNECTED: |
| return BatteryStatsManager.WIFI_STATE_ON_DISCONNECTED; |
| case CONNECTED: |
| return BatteryStatsManager.WIFI_STATE_ON_CONNECTED_STA; |
| case SOFT_AP: |
| return BatteryStatsManager.WIFI_STATE_SOFT_AP; |
| case INVALID: |
| default: |
| return INVALID; |
| } |
| } |
| } |