spanmetrics

type Arguments struct {
	// Dimensions defines the list of additional dimensions on top of the provided:
	// - service.name
	// - span.name
	// - span.kind
	// - status.code
	// The dimensions will be fetched from the span's attributes. Examples of some conventionally used attributes:
	// https://github.com/open-telemetry/opentelemetry-collector/blob/main/model/semconv/opentelemetry.go.
	Dimensions        []Dimension `river:"dimension,block,optional"`
	ExcludeDimensions []string    `river:"exclude_dimensions,attr,optional"`

	// DimensionsCacheSize defines the size of cache for storing Dimensions, which helps to avoid cache memory growing
	// indefinitely over the lifetime of the collector.
	DimensionsCacheSize int `river:"dimensions_cache_size,attr,optional"`

	AggregationTemporality string `river:"aggregation_temporality,attr,optional"`

	Histogram HistogramConfig `river:"histogram,block"`

	// MetricsEmitInterval is the time period between when metrics are flushed or emitted to the downstream components.
	MetricsFlushInterval time.Duration `river:"metrics_flush_interval,attr,optional"`

	// Namespace is the namespace of the metrics emitted by the connector.
	Namespace string `river:"namespace,attr,optional"`

	// Exemplars defines the configuration for exemplars.
	Exemplars ExemplarsConfig `river:"exemplars,block,optional"`

	// Output configures where to send processed data. Required.
	Output *otelcol.ConsumerArguments `river:"output,block"`
}

type Dimension struct {
	Name    string  `river:"name,attr"`
	Default *string `river:"default,attr,optional"`
}

type ExemplarsConfig struct {
	Enabled bool `river:"enabled,attr,optional"`
}

type ExplicitHistogramConfig struct {
	// Buckets is the list of durations representing explicit histogram buckets.
	Buckets []time.Duration `river:"buckets,attr,optional"`
}

type ExponentialHistogramConfig struct {
	MaxSize int32 `river:"max_size,attr,optional"`
}

type HistogramConfig struct {
	Disable     bool                        `river:"disable,attr,optional"`
	Unit        string                      `river:"unit,attr,optional"`
	Exponential *ExponentialHistogramConfig `river:"exponential,block,optional"`
	Explicit    *ExplicitHistogramConfig    `river:"explicit,block,optional"`
}