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// Copyright The 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/trace"
import "go.opentelemetry.io/otel/sdk/internal/env"
const (
// DefaultAttributeValueLengthLimit is the default maximum allowed
// attribute value length, unlimited.
DefaultAttributeValueLengthLimit = -1
// DefaultAttributeCountLimit is the default maximum number of attributes
// a span can have.
DefaultAttributeCountLimit = 128
// DefaultEventCountLimit is the default maximum number of events a span
// can have.
DefaultEventCountLimit = 128
// DefaultLinkCountLimit is the default maximum number of links a span can
// have.
DefaultLinkCountLimit = 128
// DefaultAttributePerEventCountLimit is the default maximum number of
// attributes a span event can have.
DefaultAttributePerEventCountLimit = 128
// DefaultAttributePerLinkCountLimit is the default maximum number of
// attributes a span link can have.
DefaultAttributePerLinkCountLimit = 128
)
// SpanLimits represents the limits of a span.
type SpanLimits struct {
// AttributeValueLengthLimit is the maximum allowed attribute value length.
//
// This limit only applies to string and string slice attribute values.
// Any string longer than this value will be truncated to this length.
//
// Setting this to a negative value means no limit is applied.
AttributeValueLengthLimit int
// AttributeCountLimit is the maximum allowed span attribute count. Any
// attribute added to a span once this limit is reached will be dropped.
//
// Setting this to zero means no attributes will be recorded.
//
// Setting this to a negative value means no limit is applied.
AttributeCountLimit int
// EventCountLimit is the maximum allowed span event count. Any event
// added to a span once this limit is reached means it will be added but
// the oldest event will be dropped.
//
// Setting this to zero means no events we be recorded.
//
// Setting this to a negative value means no limit is applied.
EventCountLimit int
// LinkCountLimit is the maximum allowed span link count. Any link added
// to a span once this limit is reached means it will be added but the
// oldest link will be dropped.
//
// Setting this to zero means no links we be recorded.
//
// Setting this to a negative value means no limit is applied.
LinkCountLimit int
// AttributePerEventCountLimit is the maximum number of attributes allowed
// per span event. Any attribute added after this limit reached will be
// dropped.
//
// Setting this to zero means no attributes will be recorded for events.
//
// Setting this to a negative value means no limit is applied.
AttributePerEventCountLimit int
// AttributePerLinkCountLimit is the maximum number of attributes allowed
// per span link. Any attribute added after this limit reached will be
// dropped.
//
// Setting this to zero means no attributes will be recorded for links.
//
// Setting this to a negative value means no limit is applied.
AttributePerLinkCountLimit int
}
// NewSpanLimits returns a SpanLimits with all limits set to the value their
// corresponding environment variable holds, or the default if unset.
//
// • AttributeValueLengthLimit: OTEL_SPAN_ATTRIBUTE_VALUE_LENGTH_LIMIT
// (default: unlimited)
//
// • AttributeCountLimit: OTEL_SPAN_ATTRIBUTE_COUNT_LIMIT (default: 128)
//
// • EventCountLimit: OTEL_SPAN_EVENT_COUNT_LIMIT (default: 128)
//
// • AttributePerEventCountLimit: OTEL_EVENT_ATTRIBUTE_COUNT_LIMIT (default:
// 128)
//
// • LinkCountLimit: OTEL_SPAN_LINK_COUNT_LIMIT (default: 128)
//
// • AttributePerLinkCountLimit: OTEL_LINK_ATTRIBUTE_COUNT_LIMIT (default: 128)
func NewSpanLimits() SpanLimits {
return SpanLimits{
AttributeValueLengthLimit: env.SpanAttributeValueLength(DefaultAttributeValueLengthLimit),
AttributeCountLimit: env.SpanAttributeCount(DefaultAttributeCountLimit),
EventCountLimit: env.SpanEventCount(DefaultEventCountLimit),
LinkCountLimit: env.SpanLinkCount(DefaultLinkCountLimit),
AttributePerEventCountLimit: env.SpanEventAttributeCount(DefaultAttributePerEventCountLimit),
AttributePerLinkCountLimit: env.SpanLinkAttributeCount(DefaultAttributePerLinkCountLimit),
}
}
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