How to use log4jplus with logstash?

I'm new to logstash.
I'm trying to send logs of my C++ application to logstash using log4cplus library. I need to send some json data from my application to logstash. To start with I have written some piece of code that sends a string to logstash.

Below is my logstash configurations

input {
tcp {
port => 5044


output {
stdout {
codec => rubydebug

Below is my code that sends data to logstash and log4cplus configurations.

code :

PropertyConfigurator config(configFile);
std::string msg = "test msg";
Logger root = Logger::getRoot();

log4cplus conf :

log4cplus.rootLogger=INFO, SA

I was expecting "test message" to be printed on logstash console. But i was receiving some garbage data as shown below.

"@version" => "1",
"host" => "localhost",
"message" => "\u0000\u0000\u0000q\u0003\u0001\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0004root\u0000\u0000N \u0000\u0000\u0000\u0000\u0000\u0000\u0000\btest msg\u0000\u0000\u0000\u000F140382836238144Z{\u0014N\u0000\u0004\u0003\xC0\u0000\u0000\u0000\u0013../src/property.cpp\u0000\u0000\u00002\u0000\u0000\u0000\u0015int main(int, char**)",
"@timestamp" => 2018-02-07T14:59:26.284Z,
"port" => 47148

Can i do something in logstash configurations to get actual message ?
Also is it possible to use log4cplus with logstash for logging ?

Log4cplus's SocketAppender apparently serializes the log records in a binary format. Logstash can't interpret it out of the box, but it wouldn't be too hard to write a custom codec for it.

I'm not a fan of log frameworks talking directly to Logstash. How does Log4cplus behave if it can't reach Logstash?

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