87 lines
2.5 KiB
Go
87 lines
2.5 KiB
Go
|
// Copyright 2018, OpenCensus 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 (
|
||
|
|
"sync"
|
||
|
|
|
||
|
|
"go.opencensus.io/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
|
||
|
|
|
||
|
|
// MaxAnnotationEventsPerSpan is max number of annotation events per span
|
||
|
|
MaxAnnotationEventsPerSpan int
|
||
|
|
|
||
|
|
// MaxMessageEventsPerSpan is max number of message events per span
|
||
|
|
MaxMessageEventsPerSpan int
|
||
|
|
|
||
|
|
// MaxAnnotationEventsPerSpan is max number of attributes per span
|
||
|
|
MaxAttributesPerSpan int
|
||
|
|
|
||
|
|
// MaxLinksPerSpan is max number of links per span
|
||
|
|
MaxLinksPerSpan int
|
||
|
|
}
|
||
|
|
|
||
|
|
var configWriteMu sync.Mutex
|
||
|
|
|
||
|
|
const (
|
||
|
|
// DefaultMaxAnnotationEventsPerSpan is default max number of annotation events per span
|
||
|
|
DefaultMaxAnnotationEventsPerSpan = 32
|
||
|
|
|
||
|
|
// DefaultMaxMessageEventsPerSpan is default max number of message events per span
|
||
|
|
DefaultMaxMessageEventsPerSpan = 128
|
||
|
|
|
||
|
|
// DefaultMaxAttributesPerSpan is default max number of attributes per span
|
||
|
|
DefaultMaxAttributesPerSpan = 32
|
||
|
|
|
||
|
|
// DefaultMaxLinksPerSpan is default max number of links per span
|
||
|
|
DefaultMaxLinksPerSpan = 32
|
||
|
|
)
|
||
|
|
|
||
|
|
// ApplyConfig applies changes to the global tracing configuration.
|
||
|
|
//
|
||
|
|
// Fields not provided in the given config are going to be preserved.
|
||
|
|
func ApplyConfig(cfg Config) {
|
||
|
|
configWriteMu.Lock()
|
||
|
|
defer configWriteMu.Unlock()
|
||
|
|
c := *config.Load().(*Config)
|
||
|
|
if cfg.DefaultSampler != nil {
|
||
|
|
c.DefaultSampler = cfg.DefaultSampler
|
||
|
|
}
|
||
|
|
if cfg.IDGenerator != nil {
|
||
|
|
c.IDGenerator = cfg.IDGenerator
|
||
|
|
}
|
||
|
|
if cfg.MaxAnnotationEventsPerSpan > 0 {
|
||
|
|
c.MaxAnnotationEventsPerSpan = cfg.MaxAnnotationEventsPerSpan
|
||
|
|
}
|
||
|
|
if cfg.MaxMessageEventsPerSpan > 0 {
|
||
|
|
c.MaxMessageEventsPerSpan = cfg.MaxMessageEventsPerSpan
|
||
|
|
}
|
||
|
|
if cfg.MaxAttributesPerSpan > 0 {
|
||
|
|
c.MaxAttributesPerSpan = cfg.MaxAttributesPerSpan
|
||
|
|
}
|
||
|
|
if cfg.MaxLinksPerSpan > 0 {
|
||
|
|
c.MaxLinksPerSpan = cfg.MaxLinksPerSpan
|
||
|
|
}
|
||
|
|
config.Store(&c)
|
||
|
|
}
|