A TCP "Hello World" example that sends a string "Hello World!" to the target server and expects an echo response.
There are three ways of running this example:
Default
The default way is to just run this class with no arguments, which will start a server (
EchoServer) on
an ephemeral port, send a "Hello World!" message to the server and print the response.
If you want to see how
EchoServer work, you can run
EchoServer by yourself and then pass
the port on which the server started to this class as a program argument:
java io.reactivex.netty.examples.tcp.echo.EchoClient [server port]
Existing TCP server
You can also use this client to connect to an already running TCP server (different than
EchoServer) by passing the port and host of the existing server similar to the case above:
java io.reactivex.netty.examples.tcp.echo.EchoClient [server port] [server host]
If the server host is omitted from the above, it defaults to "127.0.0.1"
In all the above usages, this client will print the response received from the server.