opentracing gorm
OpenTracing instrumentation for GORM.
Install
go get -u github.com/smacker/opentracing-gorm
Usage
- Call
otgorm.AddGormCallbacks(db)with an instance of your*gorm.DB. - Clone db
db = otgorm.SetSpanToGorm(ctx, db)with a span.
Example:
var gDB *gorm.DB
func init() {
gDB = initDB()
}
func initDB() *gorm.DB {
db, err := gorm.Open("sqlite3", ":memory:")
if err != nil {
panic(err)
}
// register callbacks must be called for a root instance of your gorm.DB
otgorm.AddGormCallbacks(db)
return db
}
func Handler(ctx context.Context) {
span, ctx := opentracing.StartSpanFromContext(ctx, "handler")
defer span.Finish()
// clone db with proper context
db := otgorm.SetSpanToGorm(ctx, gDB)
// sql query
db.First
}Call to the Handler function would create sql span with table name, sql method and sql statement as a child of handler span.