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module PrometheusAdapter
extend ActiveSupport::Concern
included do
include ReactiveCaching
self.reactive_cache_key = ->(adapter) { [adapter.class.model_name.singular, adapter.id] }
self.reactive_cache_lease_timeout = 30.seconds
self.reactive_cache_refresh_interval = 30.seconds
self.reactive_cache_lifetime = 1.minute
def prometheus_client
raise NotImplementedError
end
def prometheus_client_wrapper
Gitlab::PrometheusClient.new(prometheus_client)
end
def can_query?
prometheus_client.present?
end
def query(query_name, *args)
return unless can_query?
query_class = query_klass_for(query_name)
query_args = build_query_args(*args)
with_reactive_cache(query_class.name, *query_args, &query_class.method(:transform_reactive_result))
end
# Cache metrics for specific environment
def calculate_reactive_cache(query_class_name, *args)
return unless prometheus_client
data = Kernel.const_get(query_class_name).new(prometheus_client_wrapper).query(*args)
{
success: true,
data: data,
last_update: Time.now.utc
}
rescue Gitlab::PrometheusClient::Error => err
{ success: false, result: err.message }
end
def query_klass_for(query_name)
Gitlab::Prometheus::Queries.const_get("#{query_name.to_s.classify}Query")
end
def build_query_args(*args)
args.map(&:id)
end
end
end
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