gotosocial/vendor/go.opentelemetry.io/otel/trace/config.go
2023-05-09 18:19:48 +01:00

333 lines
9.8 KiB
Go

// 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/trace"
import (
"time"
"go.opentelemetry.io/otel/attribute"
)
// TracerConfig is a group of options for a Tracer.
type TracerConfig struct {
instrumentationVersion string
// Schema URL of the telemetry emitted by the Tracer.
schemaURL string
attrs attribute.Set
}
// InstrumentationVersion returns the version of the library providing instrumentation.
func (t *TracerConfig) InstrumentationVersion() string {
return t.instrumentationVersion
}
// InstrumentationAttributes returns the attributes associated with the library
// providing instrumentation.
func (t *TracerConfig) InstrumentationAttributes() attribute.Set {
return t.attrs
}
// SchemaURL returns the Schema URL of the telemetry emitted by the Tracer.
func (t *TracerConfig) SchemaURL() string {
return t.schemaURL
}
// NewTracerConfig applies all the options to a returned TracerConfig.
func NewTracerConfig(options ...TracerOption) TracerConfig {
var config TracerConfig
for _, option := range options {
config = option.apply(config)
}
return config
}
// TracerOption applies an option to a TracerConfig.
type TracerOption interface {
apply(TracerConfig) TracerConfig
}
type tracerOptionFunc func(TracerConfig) TracerConfig
func (fn tracerOptionFunc) apply(cfg TracerConfig) TracerConfig {
return fn(cfg)
}
// SpanConfig is a group of options for a Span.
type SpanConfig struct {
attributes []attribute.KeyValue
timestamp time.Time
links []Link
newRoot bool
spanKind SpanKind
stackTrace bool
}
// Attributes describe the associated qualities of a Span.
func (cfg *SpanConfig) Attributes() []attribute.KeyValue {
return cfg.attributes
}
// Timestamp is a time in a Span life-cycle.
func (cfg *SpanConfig) Timestamp() time.Time {
return cfg.timestamp
}
// StackTrace checks whether stack trace capturing is enabled.
func (cfg *SpanConfig) StackTrace() bool {
return cfg.stackTrace
}
// Links are the associations a Span has with other Spans.
func (cfg *SpanConfig) Links() []Link {
return cfg.links
}
// NewRoot identifies a Span as the root Span for a new trace. This is
// commonly used when an existing trace crosses trust boundaries and the
// remote parent span context should be ignored for security.
func (cfg *SpanConfig) NewRoot() bool {
return cfg.newRoot
}
// SpanKind is the role a Span has in a trace.
func (cfg *SpanConfig) SpanKind() SpanKind {
return cfg.spanKind
}
// NewSpanStartConfig applies all the options to a returned SpanConfig.
// No validation is performed on the returned SpanConfig (e.g. no uniqueness
// checking or bounding of data), it is left to the SDK to perform this
// action.
func NewSpanStartConfig(options ...SpanStartOption) SpanConfig {
var c SpanConfig
for _, option := range options {
c = option.applySpanStart(c)
}
return c
}
// NewSpanEndConfig applies all the options to a returned SpanConfig.
// No validation is performed on the returned SpanConfig (e.g. no uniqueness
// checking or bounding of data), it is left to the SDK to perform this
// action.
func NewSpanEndConfig(options ...SpanEndOption) SpanConfig {
var c SpanConfig
for _, option := range options {
c = option.applySpanEnd(c)
}
return c
}
// SpanStartOption applies an option to a SpanConfig. These options are applicable
// only when the span is created.
type SpanStartOption interface {
applySpanStart(SpanConfig) SpanConfig
}
type spanOptionFunc func(SpanConfig) SpanConfig
func (fn spanOptionFunc) applySpanStart(cfg SpanConfig) SpanConfig {
return fn(cfg)
}
// SpanEndOption applies an option to a SpanConfig. These options are
// applicable only when the span is ended.
type SpanEndOption interface {
applySpanEnd(SpanConfig) SpanConfig
}
// EventConfig is a group of options for an Event.
type EventConfig struct {
attributes []attribute.KeyValue
timestamp time.Time
stackTrace bool
}
// Attributes describe the associated qualities of an Event.
func (cfg *EventConfig) Attributes() []attribute.KeyValue {
return cfg.attributes
}
// Timestamp is a time in an Event life-cycle.
func (cfg *EventConfig) Timestamp() time.Time {
return cfg.timestamp
}
// StackTrace checks whether stack trace capturing is enabled.
func (cfg *EventConfig) StackTrace() bool {
return cfg.stackTrace
}
// NewEventConfig applies all the EventOptions to a returned EventConfig. If no
// timestamp option is passed, the returned EventConfig will have a Timestamp
// set to the call time, otherwise no validation is performed on the returned
// EventConfig.
func NewEventConfig(options ...EventOption) EventConfig {
var c EventConfig
for _, option := range options {
c = option.applyEvent(c)
}
if c.timestamp.IsZero() {
c.timestamp = time.Now()
}
return c
}
// EventOption applies span event options to an EventConfig.
type EventOption interface {
applyEvent(EventConfig) EventConfig
}
// SpanOption are options that can be used at both the beginning and end of a span.
type SpanOption interface {
SpanStartOption
SpanEndOption
}
// SpanStartEventOption are options that can be used at the start of a span, or with an event.
type SpanStartEventOption interface {
SpanStartOption
EventOption
}
// SpanEndEventOption are options that can be used at the end of a span, or with an event.
type SpanEndEventOption interface {
SpanEndOption
EventOption
}
type attributeOption []attribute.KeyValue
func (o attributeOption) applySpan(c SpanConfig) SpanConfig {
c.attributes = append(c.attributes, []attribute.KeyValue(o)...)
return c
}
func (o attributeOption) applySpanStart(c SpanConfig) SpanConfig { return o.applySpan(c) }
func (o attributeOption) applyEvent(c EventConfig) EventConfig {
c.attributes = append(c.attributes, []attribute.KeyValue(o)...)
return c
}
var _ SpanStartEventOption = attributeOption{}
// WithAttributes adds the attributes related to a span life-cycle event.
// These attributes are used to describe the work a Span represents when this
// option is provided to a Span's start or end events. Otherwise, these
// attributes provide additional information about the event being recorded
// (e.g. error, state change, processing progress, system event).
//
// If multiple of these options are passed the attributes of each successive
// option will extend the attributes instead of overwriting. There is no
// guarantee of uniqueness in the resulting attributes.
func WithAttributes(attributes ...attribute.KeyValue) SpanStartEventOption {
return attributeOption(attributes)
}
// SpanEventOption are options that can be used with an event or a span.
type SpanEventOption interface {
SpanOption
EventOption
}
type timestampOption time.Time
func (o timestampOption) applySpan(c SpanConfig) SpanConfig {
c.timestamp = time.Time(o)
return c
}
func (o timestampOption) applySpanStart(c SpanConfig) SpanConfig { return o.applySpan(c) }
func (o timestampOption) applySpanEnd(c SpanConfig) SpanConfig { return o.applySpan(c) }
func (o timestampOption) applyEvent(c EventConfig) EventConfig {
c.timestamp = time.Time(o)
return c
}
var _ SpanEventOption = timestampOption{}
// WithTimestamp sets the time of a Span or Event life-cycle moment (e.g.
// started, stopped, errored).
func WithTimestamp(t time.Time) SpanEventOption {
return timestampOption(t)
}
type stackTraceOption bool
func (o stackTraceOption) applyEvent(c EventConfig) EventConfig {
c.stackTrace = bool(o)
return c
}
func (o stackTraceOption) applySpan(c SpanConfig) SpanConfig {
c.stackTrace = bool(o)
return c
}
func (o stackTraceOption) applySpanEnd(c SpanConfig) SpanConfig { return o.applySpan(c) }
// WithStackTrace sets the flag to capture the error with stack trace (e.g. true, false).
func WithStackTrace(b bool) SpanEndEventOption {
return stackTraceOption(b)
}
// WithLinks adds links to a Span. The links are added to the existing Span
// links, i.e. this does not overwrite. Links with invalid span context are ignored.
func WithLinks(links ...Link) SpanStartOption {
return spanOptionFunc(func(cfg SpanConfig) SpanConfig {
cfg.links = append(cfg.links, links...)
return cfg
})
}
// WithNewRoot specifies that the Span should be treated as a root Span. Any
// existing parent span context will be ignored when defining the Span's trace
// identifiers.
func WithNewRoot() SpanStartOption {
return spanOptionFunc(func(cfg SpanConfig) SpanConfig {
cfg.newRoot = true
return cfg
})
}
// WithSpanKind sets the SpanKind of a Span.
func WithSpanKind(kind SpanKind) SpanStartOption {
return spanOptionFunc(func(cfg SpanConfig) SpanConfig {
cfg.spanKind = kind
return cfg
})
}
// WithInstrumentationVersion sets the instrumentation version.
func WithInstrumentationVersion(version string) TracerOption {
return tracerOptionFunc(func(cfg TracerConfig) TracerConfig {
cfg.instrumentationVersion = version
return cfg
})
}
// WithInstrumentationAttributes sets the instrumentation attributes.
//
// The passed attributes will be de-duplicated.
func WithInstrumentationAttributes(attr ...attribute.KeyValue) TracerOption {
return tracerOptionFunc(func(config TracerConfig) TracerConfig {
config.attrs = attribute.NewSet(attr...)
return config
})
}
// WithSchemaURL sets the schema URL for the Tracer.
func WithSchemaURL(schemaURL string) TracerOption {
return tracerOptionFunc(func(cfg TracerConfig) TracerConfig {
cfg.schemaURL = schemaURL
return cfg
})
}