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option.go
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option.go
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package gocql
type queryConfig struct {
serviceName, resourceName string
noDebugStack bool
analyticsRate float64
}
// WrapOption represents an option that can be passed to WrapQuery.
type WrapOption func(*queryConfig)
func defaults(cfg *queryConfig) {
cfg.serviceName = "gocql.query"
// cfg.analyticsRate = globalconfig.AnalyticsRate()
}
// WithServiceName sets the given service name for the returned query.
func WithServiceName(name string) WrapOption {
return func(cfg *queryConfig) {
cfg.serviceName = name
}
}
// WithResourceName sets a custom resource name to be used with the traced query.
// By default, the query statement is extracted automatically. This method should
// be used when a different resource name is desired or in performance critical
// environments. The gocql library returns the query statement using an fmt.Sprintf
// call, which can be costly when called repeatedly. Using WithResourceName will
// avoid that call. Under normal circumstances, it is safe to rely on the default.
func WithResourceName(name string) WrapOption {
return func(cfg *queryConfig) {
cfg.resourceName = name
}
}
// WithAnalytics enables Trace Analytics for all started spans.
func WithAnalytics(on bool) WrapOption {
if on {
return WithAnalyticsRate(1.0)
}
return WithAnalyticsRate(0.0)
}
// WithAnalyticsRate sets the sampling rate for Trace Analytics events
// correlated to started spans.
func WithAnalyticsRate(rate float64) WrapOption {
return func(cfg *queryConfig) {
cfg.analyticsRate = rate
}
}
// NoDebugStack prevents stack traces from being attached to spans finishing
// with an error. This is useful in situations where errors are frequent and
// performance is critical.
func NoDebugStack() WrapOption {
return func(cfg *queryConfig) {
cfg.noDebugStack = true
}
}