mirror of
https://github.com/caddyserver/caddy.git
synced 2024-12-15 16:23:38 +08:00
f4bf4e0097
* perf: use zap's Check() to prevent useless allocs * fix * fix * fix * fix * restore previous replacer behavior * fix linter
67 lines
1.8 KiB
Go
67 lines
1.8 KiB
Go
package tracing
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"sync"
|
|
|
|
sdktrace "go.opentelemetry.io/otel/sdk/trace"
|
|
"go.uber.org/zap"
|
|
"go.uber.org/zap/zapcore"
|
|
)
|
|
|
|
// globalTracerProvider stores global tracer provider and is responsible for graceful shutdown when nobody is using it.
|
|
var globalTracerProvider = &tracerProvider{}
|
|
|
|
type tracerProvider struct {
|
|
mu sync.Mutex
|
|
tracerProvider *sdktrace.TracerProvider
|
|
tracerProvidersCounter int
|
|
}
|
|
|
|
// getTracerProvider create or return an existing global TracerProvider
|
|
func (t *tracerProvider) getTracerProvider(opts ...sdktrace.TracerProviderOption) *sdktrace.TracerProvider {
|
|
t.mu.Lock()
|
|
defer t.mu.Unlock()
|
|
|
|
t.tracerProvidersCounter++
|
|
|
|
if t.tracerProvider == nil {
|
|
t.tracerProvider = sdktrace.NewTracerProvider(
|
|
opts...,
|
|
)
|
|
}
|
|
|
|
return t.tracerProvider
|
|
}
|
|
|
|
// cleanupTracerProvider gracefully shutdown a TracerProvider
|
|
func (t *tracerProvider) cleanupTracerProvider(logger *zap.Logger) error {
|
|
t.mu.Lock()
|
|
defer t.mu.Unlock()
|
|
|
|
if t.tracerProvidersCounter > 0 {
|
|
t.tracerProvidersCounter--
|
|
}
|
|
|
|
if t.tracerProvidersCounter == 0 {
|
|
if t.tracerProvider != nil {
|
|
// tracerProvider.ForceFlush SHOULD be invoked according to https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/trace/sdk.md#forceflush
|
|
if err := t.tracerProvider.ForceFlush(context.Background()); err != nil {
|
|
if c := logger.Check(zapcore.ErrorLevel, "forcing flush"); c != nil {
|
|
c.Write(zap.Error(err))
|
|
}
|
|
}
|
|
|
|
// tracerProvider.Shutdown MUST be invoked according to https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/trace/sdk.md#shutdown
|
|
if err := t.tracerProvider.Shutdown(context.Background()); err != nil {
|
|
return fmt.Errorf("tracerProvider shutdown error: %w", err)
|
|
}
|
|
}
|
|
|
|
t.tracerProvider = nil
|
|
}
|
|
|
|
return nil
|
|
}
|