/
metrics_router.go
69 lines (59 loc) · 1.81 KB
/
metrics_router.go
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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package connector // import "go.opentelemetry.io/collector/connector"
import (
"fmt"
"go.uber.org/multierr"
"go.opentelemetry.io/collector/component"
"go.opentelemetry.io/collector/consumer"
"go.opentelemetry.io/collector/internal/fanoutconsumer"
)
// MetricsRouterAndConsumer feeds the first consumer.Metrics in each of the specified pipelines.
type MetricsRouterAndConsumer interface {
consumer.Metrics
Consumer(...component.ID) (consumer.Metrics, error)
PipelineIDs() []component.ID
privateFunc()
}
type metricsRouter struct {
consumer.Metrics
consumers map[component.ID]consumer.Metrics
}
func NewMetricsRouter(cm map[component.ID]consumer.Metrics) MetricsRouterAndConsumer {
consumers := make([]consumer.Metrics, 0, len(cm))
for _, cons := range cm {
consumers = append(consumers, cons)
}
return &metricsRouter{
Metrics: fanoutconsumer.NewMetrics(consumers),
consumers: cm,
}
}
func (r *metricsRouter) PipelineIDs() []component.ID {
ids := make([]component.ID, 0, len(r.consumers))
for id := range r.consumers {
ids = append(ids, id)
}
return ids
}
func (r *metricsRouter) Consumer(pipelineIDs ...component.ID) (consumer.Metrics, error) {
if len(pipelineIDs) == 0 {
return nil, fmt.Errorf("missing consumers")
}
consumers := make([]consumer.Metrics, 0, len(pipelineIDs))
var errors error
for _, pipelineID := range pipelineIDs {
c, ok := r.consumers[pipelineID]
if ok {
consumers = append(consumers, c)
} else {
errors = multierr.Append(errors, fmt.Errorf("missing consumer: %q", pipelineID))
}
}
if errors != nil {
// TODO potentially this could return a NewMetrics with the valid consumers
return nil, errors
}
return fanoutconsumer.NewMetrics(consumers), nil
}
func (r *metricsRouter) privateFunc() {}