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get-safe.go
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get-safe.go
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package config
import "sync"
type safe struct{}
var (
// Concurrent makes concurrency safe get methods available.
Concurrent = &safe{}
)
// GetAsString returns a function that returns the wanted string with high performance.
func (cs *safe) GetAsString(name string, fallback string) StringOption {
valid := getValidityFlag()
option, valueCache := getValueCache(name, nil, OptTypeString)
value := fallback
if valueCache != nil {
value = valueCache.stringVal
}
var lock sync.Mutex
return func() string {
lock.Lock()
defer lock.Unlock()
if !valid.IsSet() {
valid = getValidityFlag()
option, valueCache = getValueCache(name, option, OptTypeString)
if valueCache != nil {
value = valueCache.stringVal
} else {
value = fallback
}
}
return value
}
}
// GetAsStringArray returns a function that returns the wanted string with high performance.
func (cs *safe) GetAsStringArray(name string, fallback []string) StringArrayOption {
valid := getValidityFlag()
option, valueCache := getValueCache(name, nil, OptTypeStringArray)
value := fallback
if valueCache != nil {
value = valueCache.stringArrayVal
}
var lock sync.Mutex
return func() []string {
lock.Lock()
defer lock.Unlock()
if !valid.IsSet() {
valid = getValidityFlag()
option, valueCache = getValueCache(name, option, OptTypeStringArray)
if valueCache != nil {
value = valueCache.stringArrayVal
} else {
value = fallback
}
}
return value
}
}
// GetAsInt returns a function that returns the wanted int with high performance.
func (cs *safe) GetAsInt(name string, fallback int64) IntOption {
valid := getValidityFlag()
option, valueCache := getValueCache(name, nil, OptTypeInt)
value := fallback
if valueCache != nil {
value = valueCache.intVal
}
var lock sync.Mutex
return func() int64 {
lock.Lock()
defer lock.Unlock()
if !valid.IsSet() {
valid = getValidityFlag()
option, valueCache = getValueCache(name, option, OptTypeInt)
if valueCache != nil {
value = valueCache.intVal
} else {
value = fallback
}
}
return value
}
}
// GetAsBool returns a function that returns the wanted int with high performance.
func (cs *safe) GetAsBool(name string, fallback bool) BoolOption {
valid := getValidityFlag()
option, valueCache := getValueCache(name, nil, OptTypeBool)
value := fallback
if valueCache != nil {
value = valueCache.boolVal
}
var lock sync.Mutex
return func() bool {
lock.Lock()
defer lock.Unlock()
if !valid.IsSet() {
valid = getValidityFlag()
option, valueCache = getValueCache(name, option, OptTypeBool)
if valueCache != nil {
value = valueCache.boolVal
} else {
value = fallback
}
}
return value
}
}