Class: Karafka::Web::Tracking::Producers::Sampler

Inherits:
Sampler
  • Object
show all
Includes:
Core::Helpers::Time
Defined in:
lib/karafka/web/tracking/producers/sampler.rb

Overview

Samples for collecting producers related data we’re interested in

Constant Summary collapse

SCHEMA_VERSION =

Current schema version This can be used in the future for detecting incompatible changes and writing migrations

'1.0.0'

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Sampler

#karafka_core_version, #karafka_version, #karafka_web_version, #librdkafka_version, #process_name, #rdkafka_version, #ruby_version, #waterdrop_version

Constructor Details

#initialize ⇒ Sampler

Returns a new instance of Sampler.



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# File 'lib/karafka/web/tracking/producers/sampler.rb', line 19

def initialize
  super

  @errors = []
  @started_at = float_now
end

Instance Attribute Details

#errors ⇒ Object (readonly)

Returns the value of attribute errors.



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# File 'lib/karafka/web/tracking/producers/sampler.rb', line 12

def errors
  @errors
end

Instance Method Details

#clear ⇒ Object

Clears the sampler (for use after data dispatch)



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# File 'lib/karafka/web/tracking/producers/sampler.rb', line 38

def clear
  @errors.clear
end

#track ⇒ Object

We cannot report and track the same time, that is why we use mutex here. To make sure that samples aggregations and counting does not interact with reporter flushing.



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# File 'lib/karafka/web/tracking/producers/sampler.rb', line 28

def track
  # Prevents deadlocks when something producer related fails in the Web UI reporter
  return yield(self) if Reporter::MUTEX.owned?

  Reporter::MUTEX.synchronize do
    yield(self)
  end
end