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metrics.go
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metrics.go
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// Copyright © 2022 Weald Technology Trading.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package batch
import (
"context"
"github.com/pkg/errors"
"github.com/prometheus/client_golang/prometheus"
"github.com/wealdtech/execd/services/metrics"
)
var metricsNamespace = "execd"
var latestBlock prometheus.Gauge
var blocksProcessed prometheus.Gauge
func registerMetrics(ctx context.Context, monitor metrics.Service) error {
if latestBlock != nil {
// Already registered.
return nil
}
if monitor == nil {
// No monitor.
return nil
}
if monitor.Presenter() == "prometheus" {
return registerPrometheusMetrics(ctx)
}
return nil
}
func registerPrometheusMetrics(ctx context.Context) error {
latestBlock = prometheus.NewGauge(prometheus.GaugeOpts{
Namespace: metricsNamespace,
Subsystem: "balances",
Name: "latest",
Help: "Latest block processed",
})
if err := prometheus.Register(latestBlock); err != nil {
return errors.Wrap(err, "failed to register latest block")
}
blocksProcessed = prometheus.NewGauge(prometheus.GaugeOpts{
Namespace: metricsNamespace,
Subsystem: "balances",
Name: "processed",
Help: "Number of blocks processed",
})
if err := prometheus.Register(blocksProcessed); err != nil {
return errors.Wrap(err, "failed to register blocks processed")
}
return nil
}
func monitorBlocksProcessed(blocks int, height uint32) {
if blocksProcessed != nil {
blocksProcessed.Add(float64(blocks))
latestBlock.Set(float64(height))
}
}