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tracing.go
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tracing.go
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package mortar
import (
"context"
confkeys "github.com/go-masonry/mortar/interfaces/cfg/keys"
"github.com/go-masonry/bjaeger"
"github.com/go-masonry/mortar/interfaces/cfg"
"github.com/go-masonry/mortar/interfaces/log"
opentracing "github.com/opentracing/opentracing-go"
"go.uber.org/fx"
)
func TracerFxOption() fx.Option {
return fx.Provide(JaegerBuilder)
}
// JaegerBuilder constructor assumes you have JAEGER environment variables set
//
// https://github.com/jaegertracing/jaeger-client-go#environment-variables
//
// Once built it will register Lifecycle hooks (connect on start, close on stop)
func JaegerBuilder(lc fx.Lifecycle, config cfg.Config, logger log.Logger) (opentracing.Tracer, error) {
openTracer, err := bjaeger.Builder().
SetServiceName(config.Get(confkeys.ApplicationName).String()).
AddOptions(bjaeger.BricksLoggerOption(logger)). // verbose logging,
Build()
if err != nil {
return nil, err
}
lc.Append(fx.Hook{
OnStart: func(ctx context.Context) error {
return openTracer.Connect(ctx)
},
OnStop: func(ctx context.Context) error {
return openTracer.Close(ctx)
},
})
return openTracer.Tracer(), nil
}