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This commit applies ormolu to the whole Haskell code base by running `make format`. For in-flight branches, simply merging changes from `main` will result in merge conflicts. To avoid this, update your branch using the following instructions. Replace `<format-commit>` by the hash of *this* commit. $ git checkout my-feature-branch $ git merge <format-commit>^ # and resolve conflicts normally $ make format $ git commit -a -m "reformat with ormolu" $ git merge -s ours post-ormolu https://github.com/hasura/graphql-engine-mono/pull/2404 GitOrigin-RevId: 75049f5c12f430c615eafb4c6b8e83e371e01c8e
85 lines
2.5 KiB
Haskell
85 lines
2.5 KiB
Haskell
module Hasura.Server.Metrics
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( ServerMetricsSpec (..),
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ServerMetrics (..),
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createServerMetrics,
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)
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where
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import Data.Kind (Type)
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import GHC.TypeLits (Symbol)
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import Hasura.Prelude
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import System.Metrics
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import System.Metrics.Distribution (Distribution)
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import System.Metrics.Gauge (Gauge)
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-- | A specification of the metrics tracked by the server.
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--
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-- The use of the "unit" type () for the "tag structure" type parameter of a
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-- metric indicates that we prohibit that metric from being annotated with
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-- tags.
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data
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ServerMetricsSpec ::
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Symbol -> -- Metric name
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MetricType -> -- Metric type, e.g. Counter, Gauge
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Type -> -- Tag structure
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Type
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where
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-- | Current Number of active Warp threads
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WarpThreads ::
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ServerMetricsSpec
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"warp_threads"
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'GaugeType
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()
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-- | Current number of active websocket connections
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WebsocketConnections ::
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ServerMetricsSpec
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"websocket_connections"
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'GaugeType
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()
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-- | Current number of active subscriptions
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ActiveSubscriptions ::
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ServerMetricsSpec
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"active_subscriptions"
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'GaugeType
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()
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-- | Total Number of events fetched from last 'Event Trigger Fetch'
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NumEventsFetchedPerBatch ::
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ServerMetricsSpec
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"events_fetched_per_batch"
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'DistributionType
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()
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-- | Current number of Event trigger's HTTP workers in process
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NumEventHTTPWorkers ::
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ServerMetricsSpec
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"num_event_trigger_http_workers"
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'GaugeType
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()
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-- | Time (in seconds) between the 'Event Trigger Fetch' from DB and the
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-- processing of the event
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EventQueueTime ::
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ServerMetricsSpec
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"event_queue_time"
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'DistributionType
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()
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-- | Mutable references for the server metrics. See `ServerMetricsSpec` for a
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-- description of each metric.
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data ServerMetrics = ServerMetrics
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{ smWarpThreads :: !Gauge,
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smWebsocketConnections :: !Gauge,
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smActiveSubscriptions :: !Gauge,
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smNumEventsFetchedPerBatch :: !Distribution,
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smNumEventHTTPWorkers :: !Gauge,
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smEventQueueTime :: !Distribution
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}
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createServerMetrics :: Store ServerMetricsSpec -> IO ServerMetrics
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createServerMetrics store = do
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smWarpThreads <- createGauge WarpThreads () store
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smWebsocketConnections <- createGauge WebsocketConnections () store
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smActiveSubscriptions <- createGauge ActiveSubscriptions () store
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smNumEventsFetchedPerBatch <- createDistribution NumEventsFetchedPerBatch () store
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smNumEventHTTPWorkers <- createGauge NumEventHTTPWorkers () store
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smEventQueueTime <- createDistribution EventQueueTime () store
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pure ServerMetrics {..}
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