options_pattern

Documentation

Index

• type Connect
  • func NewConnec(addr string, opts ...Option) (*Connect, error)
• type Connection
  • func NewConnect(addr string, opts *ConnectionOptions) (*Connection, error)
• type Connection1
  • func NewConnect1(addr string) (*Connection1, error)
  • func NewConnectWithOptions(addr string, cache bool, time time.Duration) (*Connection1, error)
• type ConnectionOptions
  • func NewDefaultOptions() *ConnectionOptions
• type Option
  • func WithCaching(cache bool) Option
  • func WithTimeOut(t time.Duration) Option

Types

type Connect

type Connect struct {
	// contains filtered or unexported fields
}

选项模式有很多优点，例如：支持传递多个参数，并且在参数发生变化时保持兼容性； 支持任意顺序传递参数；支持默认值；方便扩展；通过 WithXXX 的函数命名，可以使参数意义更加明确 结构体参数很多，创建结构体时，我们期望创建一个携带默认值的结构体变量，并选择性修改其中一些参数的值。 结构体参数经常变动，变动时我们又不想修改创建实例的函数。例如：结构体新增一个 retry 参数， 但是又不想在 NewConnect 入参列表中添加retry int这样的参数声明。

func NewConnec

func NewConnec(addr string, opts ...Option) (*Connect, error)

type Connection

type Connection struct {
	// contains filtered or unexported fields
}

func NewConnect

func NewConnect(addr string, opts *ConnectionOptions) (*Connection, error)

type Connection1

type Connection1 struct {
	// contains filtered or unexported fields
}

func NewConnect1

func NewConnect1(addr string) (*Connection1, error)

func NewConnectWithOptions

func NewConnectWithOptions(addr string, cache bool, time time.Duration) (*Connection1, error)

type ConnectionOptions

type ConnectionOptions struct {
	Caching bool
	Timeout time.Duration
}

func NewDefaultOptions

func NewDefaultOptions() *ConnectionOptions

type Option

type Option interface {
	// contains filtered or unexported methods
}

func WithCaching

func WithCaching(cache bool) Option

func WithTimeOut

func WithTimeOut(t time.Duration) Option