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87 lines
2.5 KiB
Go
87 lines
2.5 KiB
Go
// Copyright 2018, OpenCensus Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package trace
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import (
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"sync"
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"go.opencensus.io/trace/internal"
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)
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// Config represents the global tracing configuration.
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type Config struct {
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// DefaultSampler is the default sampler used when creating new spans.
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DefaultSampler Sampler
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// IDGenerator is for internal use only.
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IDGenerator internal.IDGenerator
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// MaxAnnotationEventsPerSpan is max number of annotation events per span
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MaxAnnotationEventsPerSpan int
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// MaxMessageEventsPerSpan is max number of message events per span
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MaxMessageEventsPerSpan int
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// MaxAnnotationEventsPerSpan is max number of attributes per span
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MaxAttributesPerSpan int
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// MaxLinksPerSpan is max number of links per span
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MaxLinksPerSpan int
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}
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var configWriteMu sync.Mutex
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const (
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// DefaultMaxAnnotationEventsPerSpan is default max number of annotation events per span
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DefaultMaxAnnotationEventsPerSpan = 32
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// DefaultMaxMessageEventsPerSpan is default max number of message events per span
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DefaultMaxMessageEventsPerSpan = 128
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// DefaultMaxAttributesPerSpan is default max number of attributes per span
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DefaultMaxAttributesPerSpan = 32
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// DefaultMaxLinksPerSpan is default max number of links per span
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DefaultMaxLinksPerSpan = 32
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)
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// ApplyConfig applies changes to the global tracing configuration.
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//
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// Fields not provided in the given config are going to be preserved.
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func ApplyConfig(cfg Config) {
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configWriteMu.Lock()
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defer configWriteMu.Unlock()
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c := *config.Load().(*Config)
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if cfg.DefaultSampler != nil {
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c.DefaultSampler = cfg.DefaultSampler
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}
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if cfg.IDGenerator != nil {
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c.IDGenerator = cfg.IDGenerator
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}
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if cfg.MaxAnnotationEventsPerSpan > 0 {
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c.MaxAnnotationEventsPerSpan = cfg.MaxAnnotationEventsPerSpan
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}
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if cfg.MaxMessageEventsPerSpan > 0 {
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c.MaxMessageEventsPerSpan = cfg.MaxMessageEventsPerSpan
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}
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if cfg.MaxAttributesPerSpan > 0 {
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c.MaxAttributesPerSpan = cfg.MaxAttributesPerSpan
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}
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if cfg.MaxLinksPerSpan > 0 {
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c.MaxLinksPerSpan = cfg.MaxLinksPerSpan
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}
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config.Store(&c)
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}
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