metric

Documentation

Index

• func Do(f func(KeyValue))
• func Publish(name string, v Var)
• type Float
  • func NewFloat(name string) *Float
  • func (v *Float) Add(delta float64)
  • func (v *Float) Set(value float64)
  • func (v *Float) String() string
• type Func
  • func (f Func) String() string
• type Int
  • func NewInt(name string) *Int
  • func (v *Int) Add(delta int64)
  • func (v *Int) Set(value int64)
  • func (v *Int) String() string
• type KeyValue
• type Map
  • func NewMap(name string) *Map
  • func (v *Map) Add(key string, delta int64)
  • func (v *Map) AddFloat(key string, delta float64)
  • func (v *Map) Do(f func(KeyValue))
  • func (v *Map) Get(key string) Var
  • func (v *Map) Init() *Map
  • func (v *Map) Set(key string, av Var)
  • func (v *Map) String() string
• type MetricServer
  • func NewMetricServer(addr, path string) *MetricServer
  • func (s *MetricServer) Start() error
• type String
  • func NewString(name string) *String
  • func (v *String) Set(value string)
  • func (v *String) String() string
• type Var
  • func Get(name string) Var

Functions

func Do

func Do(f func(KeyValue))

Do calls f for each exported variable. The global variable map is locked during the iteration, but existing entries may be concurrently updated.

func Publish

func Publish(name string, v Var)

Publish declares a named exported variable. This should be called from a package's init function when it creates its Vars. If the name is already registered then this will log.Panic.

Types

type Float

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

Float is a 64-bit float variable that satisfies the Var interface.

func NewFloat

func NewFloat(name string) *Float

func (*Float) Add

func (v *Float) Add(delta float64)

Add adds delta to v.

func (*Float) Set

func (v *Float) Set(value float64)

Set sets v to value.

func (*Float) String

func (v *Float) String() string

type Func

type Func func() interface{}

Func implements Var by calling the function and formatting the returned value using JSON.

func (Func) String

func (f Func) String() string

type Int

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

Int is a 64-bit integer variable that satisfies the Var interface.

func NewInt

func NewInt(name string) *Int

func (*Int) Add

func (v *Int) Add(delta int64)

func (*Int) Set

func (v *Int) Set(value int64)

func (*Int) String

func (v *Int) String() string

type KeyValue

type KeyValue struct {
	Key   string
	Value Var
}

KeyValue represents a single entry in a Map.

type Map

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

Map is a string-to-Var map variable that satisfies the Var interface.

func NewMap

func NewMap(name string) *Map

func (*Map) Add

func (v *Map) Add(key string, delta int64)

func (*Map) AddFloat

func (v *Map) AddFloat(key string, delta float64)

AddFloat adds delta to the *Float value stored under the given map key.

func (*Map) Do

func (v *Map) Do(f func(KeyValue))

Do calls f for each entry in the map. The map is locked during the iteration, but existing entries may be concurrently updated.

func (*Map) Get

func (v *Map) Get(key string) Var

func (*Map) Init

func (v *Map) Init() *Map

func (*Map) Set

func (v *Map) Set(key string, av Var)

func (*Map) String

func (v *Map) String() string

type MetricServer

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

func NewMetricServer

func NewMetricServer(addr, path string) *MetricServer

func (*MetricServer) Start

func (s *MetricServer) Start() error

type String

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

String is a string variable, and satisfies the Var interface.

func NewString

func NewString(name string) *String

func (*String) Set

func (v *String) Set(value string)

func (*String) String

func (v *String) String() string

type Var

type Var interface {
	// String returns a valid JSON value for the variable.
	// Types with String methods that do not return valid JSON
	// (such as time.Time) must not be used as a Var.
	String() string
}

Var is an abstract type for all exported variables.

func Get

func Get(name string) Var

Get retrieves a named exported variable. It returns nil if the name has not been registered.