judoscale-node-core/src/metrics-store.js

Core dependencies for NodeJS adapters for the JudoScale autoscaling add-on for Heroku

const Metric = require('./metric')

class MetricsStore {
  constructor() {
    this.metrics = []
    this.flushedAt = new Date()
  }

  push(identifier, value, time = new Date(), queueName = null) {
    if (this.flushedAt && this.flushedAt < new Date(new Date() - 120000)) {
      return false
    }

    const metric = new Metric(identifier, time, value, queueName)

    this.metrics.push(metric)

    return true
  }

  flush() {
    this.flushedAt = new Date()

    const flushedMetrics = []

    let metric = null

    while ((metric = this.metrics.shift())) {
      flushedMetrics.push(metric)
    }

    return flushedMetrics
  }

  clear() {
    this.metrics = []
  }
}

module.exports = MetricsStore