plasmid/test.js

A low-level implementation of the anti-entropy gossip protocol scuttlebutt.

Error.stackTraceLimit = Infinity;

var Host = require('./lib/').Host

var opts = { syncHistory: true, peerSelection: 'random', gossipRate: 30 }

var a = new Host('A', opts)
a.set('a', 'A')

var b = new Host('B', opts)
b.set('b', 'B')

var c = new Host('C', opts)
c.set('c', 'C')

var as = a.createStream({ end: false })
as.pipe(b.exchange())
  .pipe(as)

var bs = b.createStream({ end: false })
bs.pipe(c.exchange())
  .pipe(bs)

var cs = c.createStream({ end: false })
cs.pipe(a.exchange())
  .pipe(cs)


function gossip() {
  as.gossip()
  bs.gossip()
  cs.gossip()
}

repeat(gossip, 6, function() {
  console.log(a.state.states)
  console.log(b.state.states)
  console.log(c.state.states)
})

// net.createServer(function (socket) {
//
//   // digest -> deltas
//   socket.pipe(b).pipe(socket)
//   b.createDigestStream().pipe(socket).pipe(b)
//
// }).listen(8000, function () {
//
//   var socket = net.connect(8000)
//   // deltas -> update
//   a.createDigestStream().pipe(socket).pipe(a)
//
// })

// var as = a.createStream()
// var bs = b.createStream()
// var cs = c.createStream()
//
// as.pipe(b.createStream()).pipe(as)
// bs.pipe(c.createStream()).pipe(bs)
// cs.pipe(a.createStream()).pipe(cs)
//
// setTimeout(function() {
//   a.end()
//   b.end()
//   c.end()
//
//   console.log(a.states)
//   console.log(b.states)
//   console.log(c.states)
// }, 7000)


function repeat(fn, times, callback) {
  fn()
  setImmediate(function() {
    if (--times > 1) {
      repeat(fn, times, callback)
    } else {
      callback()
    }
  })
}