jmsg 
Jmsg is a simple module to communicate with another instance across a stream or other kind of message channel. Communication is two-way, and messages are mixed action / reply and events.
Installing
$ npm install --save jmsg
Usage
const jmsg = require('jmsg');
jmsg.stream(socket, {
foobar(obj) {
/* ... */
}
});
The jmsg.stream(stream, handlers) method takes a duplex stream, like a
socket, and an object with message handlers.
There's also jmsg.cluster([worker], handlers), which uses the IPC channel
from the cluster module. The worker argument is only used on the master side.
Finally, the main jmsg(writeFn, handlers) export is the low-level interface,
where writeFn is a function that takes a JSON object to be transmitted to the
dispatch(obj) handle method on the side.
Each of these returns a handle, with the following properties:
-
send(type, [value], [callback]), method to send a message. Whether a callback is specified determines whether the message expects a reply (an action) or not (an event). -
handlers, the object containing message handlers. -
timeout, the timeout in milliseconds to wait for a reply to an action, before the callback is called with an error.
Hacking the code
git clone https://github.com/Two-Screen/jmsg.git
cd jmsg
npm install
npm test