opentelemetry-go/sdk/trace/config.go

// Copyright 2019, OpenTelemetry Authors
//
// 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 trace

import (
	"go.opentelemetry.io/otel/sdk/resource"
	"go.opentelemetry.io/otel/sdk/trace/internal"
)

// Config represents the global tracing configuration.
type Config struct {
	// DefaultSampler is the default sampler used when creating new spans.
	DefaultSampler Sampler

	// IDGenerator is for internal use only.
	IDGenerator internal.IDGenerator

	// MaxEventsPerSpan is max number of message events per span
	MaxEventsPerSpan int

	// MaxAnnotationEventsPerSpan is max number of attributes per span
	MaxAttributesPerSpan int

	// MaxLinksPerSpan is max number of links per span
	MaxLinksPerSpan int

	// Resource contains attributes representing an entity that produces telemetry.
	Resource *resource.Resource
}

const (
	// DefaultMaxEventsPerSpan is default max number of message events per span
	DefaultMaxEventsPerSpan = 128

	// DefaultMaxAttributesPerSpan is default max number of attributes per span
	DefaultMaxAttributesPerSpan = 32

	// DefaultMaxLinksPerSpan is default max number of links per span
	DefaultMaxLinksPerSpan = 32
)