1 files changed, 26 insertions, 0 deletions
diff --git a/lib/gitlab/usage/metrics/aggregates.rb b/lib/gitlab/usage/metrics/aggregates.rb
new file mode 100644
index 00000000000..a32c413dba8
--- /dev/null
+++ b/lib/gitlab/usage/metrics/aggregates.rb
@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Usage
+    module Metrics
+      module Aggregates
+        UNION_OF_AGGREGATED_METRICS = 'OR'
+        INTERSECTION_OF_AGGREGATED_METRICS = 'AND'
+        ALLOWED_METRICS_AGGREGATIONS = [UNION_OF_AGGREGATED_METRICS, INTERSECTION_OF_AGGREGATED_METRICS].freeze
+        AGGREGATED_METRICS_PATH = Rails.root.join('config/metrics/aggregates/*.yml')
+        AggregatedMetricError = Class.new(StandardError)
+        UnknownAggregationOperator = Class.new(AggregatedMetricError)
+        UnknownAggregationSource = Class.new(AggregatedMetricError)
+        DisallowedAggregationTimeFrame = Class.new(AggregatedMetricError)
+
+        DATABASE_SOURCE = 'database'
+        REDIS_SOURCE = 'redis'
+
+        SOURCES = {
+          DATABASE_SOURCE => Sources::PostgresHll,
+          REDIS_SOURCE => Sources::RedisHll
+        }.freeze
+      end
+    end
+  end
+end