service

Documentation

Index

• Variables
• type Middleware
  • func InstrumentingMiddleware() Middleware
  • func LoggingMiddleware(logger log.Logger) Middleware
• type StringService
  • func New(logger log.Logger) StringService
  • func NewStringService() StringService

Variables

var ErrEmpty = errors.New("empty string")

ErrEmpty is returned when an input string is empty.

Types

type Middleware

type Middleware func(StringService) StringService

Middleware describes a service (as opposed to endpoint) middleware.

func InstrumentingMiddleware

func InstrumentingMiddleware() Middleware

InstrumentingMiddleware returns a service middleware that count the number of jobs processed, record the duration of requests after they’ve finished and track the number of in-flight operations.

func LoggingMiddleware

func LoggingMiddleware(logger log.Logger) Middleware

LoggingMiddleware takes a logger as a dependency and returns a ServiceMiddleware.

type StringService

type StringService interface {
	Uppercase(string) (string, error)
	Count(string) int
}

StringService provides operations on strings.

func New

func New(logger log.Logger) StringService

New returns a basic Service with all of the expected middlewares wired in.

func NewStringService

func NewStringService() StringService

NewStringService returns a naïve, stateless implementation of StringService.