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/*
* Copyright (C) 2016 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.util;
import android.annotation.NonNull;
import android.os.Message;
import com.android.internal.annotations.VisibleForTesting;
import com.android.internal.util.AsyncChannel;
import com.android.server.wifi.WifiInjector;
import com.android.server.wifi.WifiLog;
/**
* This class subclasses AsyncChannel and adds logging
* to the sendMessage() API
*/
public class WifiAsyncChannel extends AsyncChannel {
private static final String LOG_TAG = "WifiAsyncChannel";
private WifiLog mLog;
private String mTag;
/**
* AsyncChannelWithLogging constructor
*/
public WifiAsyncChannel(String serviceTag) {
mTag = LOG_TAG + "." + serviceTag;
}
@NonNull
private WifiLog getOrInitLog() {
// Lazy initization of mLog
if (mLog == null) {
mLog = WifiInjector.getInstance().makeLog(mTag);
}
return mLog;
}
/**
* Send a message to the destination handler.
*
* @param msg
*/
@Override
public void sendMessage(Message msg) {
getOrInitLog().trace("sendMessage message=%")
.c(msg.what)
.flush();
super.sendMessage(msg);
}
/**
* Reply to srcMsg
*
* @param srcMsg
* @param dstMsg
*/
@Override
public void replyToMessage(Message srcMsg, Message dstMsg) {
getOrInitLog()
.trace("replyToMessage recvdMessage=% sendingUid=% sentMessage=%")
.c(srcMsg.what)
.c(srcMsg.sendingUid)
.c(dstMsg.what)
.flush();
super.replyToMessage(srcMsg, dstMsg);
}
/**
* Send the Message synchronously.
*
* @param msg to send
* @return reply message or null if an error.
*/
@Override
public Message sendMessageSynchronously(Message msg) {
getOrInitLog().trace("sendMessageSynchronously.send message=%")
.c(msg.what)
.flush();
Message replyMessage = super.sendMessageSynchronously(msg);
if (replyMessage != null) {
getOrInitLog().trace("sendMessageSynchronously.recv message=% sendingUid=%")
.c(replyMessage.what)
.c(replyMessage.sendingUid)
.flush();
}
return replyMessage;
}
@VisibleForTesting
public void setWifiLog(WifiLog log) {
mLog = log;
}
}
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