/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.server.wifi.util;
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import android.annotation.NonNull;
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import android.os.Message;
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import com.android.internal.annotations.VisibleForTesting;
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import com.android.internal.util.AsyncChannel;
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import com.android.server.wifi.WifiInjector;
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import com.android.server.wifi.WifiLog;
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/**
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* This class subclasses AsyncChannel and adds logging
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* to the sendMessage() API
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*/
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public class WifiAsyncChannel extends AsyncChannel {
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private static final String LOG_TAG = "WifiAsyncChannel";
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private WifiLog mLog;
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private String mTag;
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/**
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* AsyncChannelWithLogging constructor
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*/
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public WifiAsyncChannel(String serviceTag) {
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mTag = LOG_TAG + "." + serviceTag;
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}
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@NonNull
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private WifiLog getOrInitLog() {
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// Lazy initization of mLog
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if (mLog == null) {
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mLog = WifiInjector.getInstance().makeLog(mTag);
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}
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return mLog;
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}
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/**
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* Send a message to the destination handler.
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*
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* @param msg
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*/
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@Override
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public void sendMessage(Message msg) {
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getOrInitLog().trace("sendMessage message=%")
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.c(msg.what)
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.flush();
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super.sendMessage(msg);
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}
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/**
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* Reply to srcMsg
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*
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* @param srcMsg
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* @param dstMsg
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*/
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@Override
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public void replyToMessage(Message srcMsg, Message dstMsg) {
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getOrInitLog()
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.trace("replyToMessage recvdMessage=% sendingUid=% sentMessage=%")
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.c(srcMsg.what)
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.c(srcMsg.sendingUid)
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.c(dstMsg.what)
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.flush();
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super.replyToMessage(srcMsg, dstMsg);
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}
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/**
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* Send the Message synchronously.
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*
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* @param msg to send
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* @return reply message or null if an error.
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*/
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@Override
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public Message sendMessageSynchronously(Message msg) {
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getOrInitLog().trace("sendMessageSynchronously.send message=%")
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.c(msg.what)
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.flush();
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Message replyMessage = super.sendMessageSynchronously(msg);
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if (replyMessage != null) {
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getOrInitLog().trace("sendMessageSynchronously.recv message=% sendingUid=%")
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.c(replyMessage.what)
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.c(replyMessage.sendingUid)
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.flush();
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}
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return replyMessage;
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}
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@VisibleForTesting
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public void setWifiLog(WifiLog log) {
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mLog = log;
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}
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}
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