Learn how to set values.

Assert values

Asserting values works same way like incrementing, but instead of increment, it sets the value. Asserting values runs set on the driver. Every time you assert a value, it will set the metrics.

assert(key: String, at: Time, values: Hash, **options)

• key - string identifier for the metrics
• at - timestamp of the sample (in most cases current timestamp)
• values - hash of values. Can contain only nested hashes and numbers (Integer, Float, BigDecimal). Any other objects will cause an error.
• options - hash of optional arguments:
  • config - optional configuration instance of Trifle::Stats::Configuration. It defaults to global configuration, otherwise uses passed in configuration.

Assert your first values

Trifle::Stats.assert(key: 'event::logs', at: Time.now, values: {count: 1, duration: 2, lines: 241})
=> [{2021-01-25 16:00:00 +0100=>{:count=>1, :duration=>2, :lines=>241}}, {2021-01-25 00:00:00 +0100=>{:count=>1, :duration=>2, :lines=>241}}]

Then do it few more times

Trifle::Stats.assert(key: 'event::logs', at: Time.now, values: {count: 1, duration: 1, lines: 56})
=> [{2021-01-25 16:00:00 +0100=>{:count=>1, :duration=>1, :lines=>56}}, {2021-01-25 00:00:00 +0100=>{:count=>1, :duration=>1, :lines=>56}}]
Trifle::Stats.assert(key: 'event::logs', at: Time.now, values: {count: 1, duration: 5, lines: 361})
=> [{2021-01-25 16:00:00 +0100=>{:count=>1, :duration=>5, :lines=>361}}, {2021-01-25 00:00:00 +0100=>{:count=>1, :duration=>5, :lines=>361}}]

Get values

Retrieve your values for specific range. As you just used assert above, it will return latest value you've asserted.

Trifle::Stats.values(key: 'event::logs', from: Time.now, to: Time.now, range: :day)
=> {:at=>[2021-01-25 00:00:00 +0200], :values=>[{"count"=>1, "duration"=>5, "lines"=>361}]}