Tracegen
Generates interface decorators with opentracing support.
Installation
go get github.com/gojuno/tracegen
Example
type Cache interface {
Set(ctx context.Context, key, value []byte) error
Get(ctx context.Context, key []byte) (value []byte, err error)
}tracegen -i Cache -o example/cache_trace.go example
Will generate:
type CacheTracer struct {
next Cache
prefix string
}
func NewCacheTracer(next Cache, prefix string) *CacheTracer {
return &CacheTracer{
next: next,
prefix: prefix,
}
}
func (t *CacheTracer) Get(ctx context.Context, key []byte) (value []byte, err error) {
span, ctx := opentracing.StartSpanFromContext(ctx, t.prefix+".Cache.Get")
defer span.Finish()
return t.next.Get(ctx, key)
}
func (t *CacheTracer) Set(ctx context.Context, key []byte, value []byte) error {
span, ctx := opentracing.StartSpanFromContext(ctx, t.prefix+".Cache.Set")
defer span.Finish()
return t.next.Set(ctx, key, value)
}