Proposed API usage for NeL Network Message Node.js implementation

gistfile1.js

let nnmessage = require('nnmessage');

let server = nnmessage.createServer();

server.onConnected(function(connection) {
  // called whe new client connects
  connection.onMessage(....);
});

server.onDisconnected(function(connection, err) {
  // called when disconnected from a successful connection, err contains disconnection cause
});

server.onMessage("CHAT", function(connection, buffer) { // can set on either server or per connection, per-connection overrides
  // do something
});

server.onRequest("ECHO", function(connection, seq, buffer) {
  connection.sendResponse(seq, buffer);
});

let buf = ...;

connection.sendMessage("CHAT", buf, function(err) {
  // function called when sent successfully, return with error if send fails (due to disconnect)
});

connection.sendRequest("ECHO", buf, function(err, buffer) {
  // api will keep note of the used sequence id, and call the callback when response with the id is received (remove callback from queue)
  // in case server disconnects before response is received, callback is called with err set to disconnect reason, and bufer null
});

server.listen(40000, function(err) {
  // callback on success, or failure with err set
});

server.disconnect(); // immediate disconnect


client = nnmessage.createClient();

client.onDisconnected(function(err) {
  // called when disconnected from a successful connection, err contains disconnection cause
});

client.connect(ip, port, function(err) {
  // ...
});

client.onMessage(...);