WifiHandler.java revision 7275c974c1d7b9451d1e67ae8d56a9d57742303c 
1/*
2 * Copyright (C) 2016 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
17package com.android.server.wifi.util;
18
19import android.annotation.NonNull;
20import android.os.Handler;
21import android.os.Looper;
22import android.os.Message;
23
24import com.android.internal.annotations.VisibleForTesting;
25
26import com.android.server.wifi.WifiInjector;
27import com.android.server.wifi.WifiLog;
28
29/**
30 * This class subclasses Handler to log incoming messages
31 */
32public class WifiHandler extends Handler {
33    private static final String LOG_TAG = "WifiHandler";
34    private WifiLog mLog;
35    private String mTag;
36
37    public WifiHandler(String tag, Looper looper) {
38        super(looper);
39        mTag = LOG_TAG + "." + tag;
40    }
41
42    @NonNull
43    private WifiLog getOrInitLog() {
44        // Lazy initialization of mLog
45        if (mLog == null) {
46            mLog = WifiInjector.getInstance().makeLog(mTag);
47        }
48        return mLog;
49    }
50
51    @Override
52    public void handleMessage(Message msg) {
53        getOrInitLog().trace("Received message=%d sendingUid=%")
54                .c(msg.what)
55                .c(msg.sendingUid)
56                .flush();
57    }
58
59    /**
60     * @hide
61     */
62    @VisibleForTesting
63    public void setWifiLog(WifiLog wifiLog) {
64        // TODO WifiInjector should be passed as a variable in the constructor
65        // b/33308811 tracks removing lazy initializations of mLog
66        mLog = wifiLog;
67    }
68}
69