Class: Gitlab::Database::Migrations::Instrumentation

Inherits:
Object
  • Object
show all
Defined in:
lib/gitlab/database/migrations/instrumentation.rb

Constant Summary collapse

STATS_FILENAME = 
'migration-stats.json'

Instance Method Summary collapse

Constructor Details

#initialize(result_dir:, observer_classes: ::Gitlab::Database::Migrations::Observers.all_observers) ⇒ Instrumentation

Returns a new instance of Instrumentation.



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# File 'lib/gitlab/database/migrations/instrumentation.rb', line 9

def initialize(result_dir:, observer_classes: ::Gitlab::Database::Migrations::Observers.all_observers)
  @observer_classes = observer_classes
  @result_dir = result_dir
end

Instance Method Details

#observe(version:, name:, connection:, meta: {}, &block) ⇒ Object 



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# File 'lib/gitlab/database/migrations/instrumentation.rb', line 14

def observe(version:, name:, connection:, meta: {}, &block)
  observation = Observation.new(version: version, name: name, success: false, meta: meta)

  per_migration_result_dir = File.join(@result_dir, name)

  FileUtils.mkdir_p(per_migration_result_dir)

  observers = observer_classes.map { |c| c.new(observation, per_migration_result_dir, connection) }

  on_each_observer(observers) { |observer| observer.before }

  start = Process.clock_gettime(Process::CLOCK_MONOTONIC)

  yield

  observation.success = true

  observation
rescue StandardError => error
  observation.error_message = error.message

  raise
ensure
  observation.walltime = Process.clock_gettime(Process::CLOCK_MONOTONIC) - start

  on_each_observer(observers) { |observer| observer.after }
  on_each_observer(observers) { |observer| observer.record }

  record_observation(observation, destination_dir: per_migration_result_dir)
end