hms-protocol

The protocol stream that hms uses to communicate between servers and clients

npm install hms-protocol

This is mostly only useful for hms

Usage

Simply pipe the stream to and from a source

var protocol = require('hms-protocol');
var net = require('net');

net.createServer(function(stream) {
    var p = protocol();
    stream.pipe(p).pipe(stream);

    p.on('start', function(id, cb) {
        console.log('we received a start for', id);
        cb();
    });
}).listen(10000, function() {
    var p = protocol();
    var stream = net.connect(10000);
    stream.pipe(p).pipe(stream);

    p.start('test', function(err) {
        console.log('start was received?', err);
    });
});

Send messages

The following messages are supported over the protocol

• p.handshake(opts, cb) send a protocol handhake
• p.ping(cb) ping to see if remote is alive
• p.get(id, cb) get information about a service
• p.add(id, service, cb) add a new service.
• p.update(id, service, cb) update an existing service
• p.remove(id, cb) remove a service
• p.list(cb) list all services
• p.ps(cb) get process information about all services
• p.start(id, cb) start a service
• p.stop(id, cb) stop a service
• p.restart(id, cb) restart a service
• p.sync(id, service, cb) sync service state
• p.subscribe([id], cb) subscribe to service events. omit the id to subscribe to *
• p.unsubscribe([id], cb) unsubscribe from service events. omit the id to unsubscribe *
• p.stdout(id, origin, buffer) send a stdout event
• p.stderr(id, origin, buffer) send a stderr event
• p.spawn(id, origin, pid) send a process spawn event
• p.exit(id, origin, code) send a process exit event
• p.amSubscribing(id) returns true if you are subscribing to id
• p.peerSubscribing(id) returns true if the peer is subscribing to id

The service message can contain the following

{
    start: 'node .',
    build: 'npm install',
    docks: [
        'dock-id-to-run-at'
    ],
    env: {
        FOO: 'bar'
    }
}

Receive messages

Sending any of the above messages will trigger an event of the same for the receiver. I.e. if you do p.start(id, cb) it will result in p.on('start', id, cb) being triggered for the receiver

License

MIT