Package expvar
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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 Handler ¶ 1.8
func Handler() http.Handler
Handler returns the expvar HTTP Handler.
This is only needed to install the handler in a non-standard location.
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.
type Float ¶
Float is a 64-bit float variable that satisfies the Var interface.
type Float struct {
// contains filtered or unexported fields
}
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
func (*Float) Value ¶ 1.8
func (v *Float) Value() float64
type Func ¶
Func implements Var by calling the function and formatting the returned value using JSON.
type Func func() any
func (Func) String ¶
func (f Func) String() string
func (Func) Value ¶ 1.8
func (f Func) Value() any
type Int ¶
Int is a 64-bit integer variable that satisfies the Var interface.
type Int struct {
// contains filtered or unexported fields
}
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
func (*Int) Value ¶ 1.8
func (v *Int) Value() int64
type KeyValue ¶
KeyValue represents a single entry in a Map.
type KeyValue struct {
Key string
Value Var
}
type Map ¶
Map is a string-to-Var map variable that satisfies the Var interface.
type Map struct {
// contains filtered or unexported fields
}
func NewMap ¶
func NewMap(name string) *Map
func (*Map) Add ¶
func (v *Map) Add(key string, delta int64)
Add adds delta to the *Int value stored under the given map key.
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) Delete ¶ 1.12
func (v *Map) Delete(key string)
Delete deletes the given key from the map.
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
Init removes all keys from the map.
func (*Map) Set ¶
func (v *Map) Set(key string, av Var)
func (*Map) String ¶
func (v *Map) String() string
type String ¶
String is a string variable, and satisfies the Var interface.
type String struct {
// contains filtered or unexported fields
}
func NewString ¶
func NewString(name string) *String
func (*String) Set ¶
func (v *String) Set(value string)
func (*String) String ¶
func (v *String) String() string
String implements the Var interface. To get the unquoted string use String.Value.
func (*String) Value ¶ 1.8
func (v *String) Value() string
type Var ¶
Var is an abstract type for all exported variables.
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
}
func Get ¶
func Get(name string) Var
Get retrieves a named exported variable. It returns nil if the name has not been registered.