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Add hypertrace instrumentation #74

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Add hypertrace instrumentation #74

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7 changes: 7 additions & 0 deletions index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,7 @@ const Session = require('./lib/session')
const peer = require('./lib/peer')
const { UNKNOWN_COMMAND, INVALID_TOKEN } = require('./lib/errors')
const { PING, PING_NAT, FIND_NODE, DOWN_HINT } = require('./lib/commands')
const { createTracer } = require('hypertrace')

const TMP = b4a.allocUnsafe(32)
const TICK_INTERVAL = 5000
Expand All @@ -26,6 +27,7 @@ class DHT extends EventEmitter {
constructor (opts = {}) {
super()

this.tracer = createTracer(this)
this.bootstrapNodes = opts.bootstrap === false ? [] : (opts.bootstrap || []).map(parseNode)
this.table = new Table(randomBytes(32))
this.nodes = new TOS()
Expand Down Expand Up @@ -113,13 +115,15 @@ class DHT extends EventEmitter {
async suspend () {
await this.io.bind()
if (this.suspended || this.destroyed) return
this.tracer.trace('suspend')
this.suspended = true
this.io.suspend()
this.emit('suspend')
}

async resume () {
if (!this.suspended || this.destroyed) return
this.tracer.trace('resume')
this.suspended = false
this._onwakeup()
await this.io.resume()
Expand Down Expand Up @@ -189,6 +193,7 @@ class DHT extends EventEmitter {

query ({ target, command, value }, opts) {
if (this.destroyed) throw new Error('Node destroyed')
this.tracer.trace('query', { command, value })
this._refreshTicks = REFRESH_TICKS
return new Query(this, target, false, command, value || null, opts)
}
Expand All @@ -203,6 +208,7 @@ class DHT extends EventEmitter {
}

request ({ token = null, command, target = null, value = null }, { host, port }, opts) {
this.tracer.trace('request', { command, value, host, port })
const req = this.io.createRequest({ id: null, host, port }, token, false, command, target, value, (opts && opts.session) || null, (opts && opts.ttl))
return this._requestToPromise(req, opts)
}
Expand Down Expand Up @@ -274,6 +280,7 @@ class DHT extends EventEmitter {
}

async destroy () {
this.tracer.trace('destroy')
const emitClose = !this.destroyed
this.destroyed = true
clearInterval(this._tickInterval)
Expand Down
1 change: 1 addition & 0 deletions package.json
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Expand Up @@ -13,6 +13,7 @@
"compact-encoding-net": "^1.2.0",
"events": "^3.3.0",
"fast-fifo": "^1.1.0",
"hypertrace": "^1.2.1",
"kademlia-routing-table": "^1.0.1",
"nat-sampler": "^1.0.1",
"sodium-universal": "^4.0.0",
Expand Down
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