/
get.go
174 lines (152 loc) · 4.19 KB
/
get.go
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package config
import (
"github.com/safing/portbase/log"
)
type (
// StringOption defines the returned function by GetAsString.
StringOption func() string
// StringArrayOption defines the returned function by GetAsStringArray.
StringArrayOption func() []string
// IntOption defines the returned function by GetAsInt.
IntOption func() int64
// BoolOption defines the returned function by GetAsBool.
BoolOption func() bool
)
func getValueCache(name string, option *Option, requestedType OptionType) (*Option, *valueCache) {
// get option
if option == nil {
var err error
option, err = GetOption(name)
if err != nil {
log.Errorf("config: request for unregistered option: %s", name)
return nil, nil
}
}
// Check the option type, no locking required as
// OptType is immutable once it is set
if requestedType != option.OptType {
log.Errorf("config: bad type: requested %s as %s, but is %s", name, getTypeName(requestedType), getTypeName(option.OptType))
return option, nil
}
option.Lock()
defer option.Unlock()
// check release level
if option.ReleaseLevel <= getReleaseLevel() && option.activeValue != nil {
return option, option.activeValue
}
if option.activeDefaultValue != nil {
return option, option.activeDefaultValue
}
return option, option.activeFallbackValue
}
// GetAsString returns a function that returns the wanted string with high performance.
func GetAsString(name string, fallback string) StringOption {
valid := getValidityFlag()
option, valueCache := getValueCache(name, nil, OptTypeString)
value := fallback
if valueCache != nil {
value = valueCache.stringVal
}
return func() string {
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 GetAsStringArray(name string, fallback []string) StringArrayOption {
valid := getValidityFlag()
option, valueCache := getValueCache(name, nil, OptTypeStringArray)
value := fallback
if valueCache != nil {
value = valueCache.stringArrayVal
}
return func() []string {
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 GetAsInt(name string, fallback int64) IntOption {
valid := getValidityFlag()
option, valueCache := getValueCache(name, nil, OptTypeInt)
value := fallback
if valueCache != nil {
value = valueCache.intVal
}
return func() int64 {
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 GetAsBool(name string, fallback bool) BoolOption {
valid := getValidityFlag()
option, valueCache := getValueCache(name, nil, OptTypeBool)
value := fallback
if valueCache != nil {
value = valueCache.boolVal
}
return func() bool {
if !valid.IsSet() {
valid = getValidityFlag()
option, valueCache = getValueCache(name, option, OptTypeBool)
if valueCache != nil {
value = valueCache.boolVal
} else {
value = fallback
}
}
return value
}
}
/*
func getAndFindValue(key string) interface{} {
optionsLock.RLock()
option, ok := options[key]
optionsLock.RUnlock()
if !ok {
log.Errorf("config: request for unregistered option: %s", key)
return nil
}
return option.findValue()
}
*/
/*
// findValue finds the preferred value in the user or default config.
func (option *Option) findValue() interface{} {
// lock option
option.Lock()
defer option.Unlock()
if option.ReleaseLevel <= getReleaseLevel() && option.activeValue != nil {
return option.activeValue
}
if option.activeDefaultValue != nil {
return option.activeDefaultValue
}
return option.DefaultValue
}
*/