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      1 /*
      2  * Copyright (C) 2010 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 
     17 package com.android.server.wifi;
     18 
     19 import android.os.BatteryStats;
     20 import android.os.RemoteException;
     21 import android.util.Log;
     22 
     23 import com.android.internal.app.IBatteryStats;
     24 
     25 import java.util.concurrent.RejectedExecutionException;
     26 
     27 /**
     28  * This class is used to track WifiState to update BatteryStats
     29  */
     30 public class WifiStateTracker {
     31     private static final String TAG = "WifiStateTracker";
     32 
     33     public static final int INVALID = 0;
     34     public static final int SCAN_MODE = 1;
     35     public static final int DISCONNECTED = 2;
     36     public static final int CONNECTED = 3;
     37     public static final int SOFT_AP = 4;
     38     private int mWifiState;
     39     private IBatteryStats mBatteryStats;
     40 
     41     public WifiStateTracker(IBatteryStats stats) {
     42         mWifiState = INVALID;
     43         mBatteryStats = stats;
     44     }
     45 
     46     private void informWifiStateBatteryStats(int state) {
     47         try {
     48             mBatteryStats.noteWifiState(state, null);
     49         } catch (RemoteException e) {
     50             Log.e(TAG, "Battery stats unreachable " + e.getMessage());
     51         } catch (RejectedExecutionException e) {
     52             Log.e(TAG, "Battery stats executor is being shutdown " + e.getMessage());
     53         }
     54     }
     55 
     56     /**
     57      * Inform the WifiState to this tracker to translate into the
     58      * WifiState corresponding to BatteryStats.
     59      * @param state state corresponding to the WifiStateMachine state
     60      */
     61     public void updateState(int state) {
     62         int reportState = BatteryStats.WIFI_STATE_OFF;
     63         if (state != mWifiState) {
     64             switch(state) {
     65                 case SCAN_MODE:
     66                     reportState = BatteryStats.WIFI_STATE_OFF_SCANNING;
     67                     break;
     68                 case DISCONNECTED:
     69                     reportState = BatteryStats.WIFI_STATE_ON_DISCONNECTED;
     70                     break;
     71                 case CONNECTED:
     72                     reportState = BatteryStats.WIFI_STATE_ON_CONNECTED_STA;
     73                     break;
     74                 case SOFT_AP:
     75                     reportState = BatteryStats.WIFI_STATE_SOFT_AP;
     76                     break;
     77                 case INVALID:
     78                     mWifiState = INVALID;
     79                     /* Fall through */
     80                 default:
     81                     return;
     82             }
     83             mWifiState = state;
     84             informWifiStateBatteryStats(reportState);
     85         }
     86         return;
     87     }
     88 }
     89