config: add Save/Load options

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>
This commit is contained in:
Василий Толстов 2021-06-20 23:57:13 +03:00
parent 598dddc476
commit 2a548634fd
3 changed files with 67 additions and 10 deletions

View File

@ -20,25 +20,27 @@ var (
// Config is an interface abstraction for dynamic configuration
type Config interface {
// Name returns name of config
Name() string
// Init the config
Init(opts ...Option) error
// Options in the config
Options() Options
// Load config from sources
Load(context.Context) error
Load(context.Context, ...LoadOption) error
// Save config to sources
Save(context.Context) error
Save(context.Context, ...SaveOption) error
// Watch a value for changes
// Watch(interface{}) (Watcher, error)
//Watch(context.Context) (Watcher, error)
// String returns config type name
String() string
}
// Watcher is the config watcher
// type Watcher interface {
// Next() (, error)
// Stop() error
// }
type Watcher interface {
// Next() (, error)
Stop() error
}
// Load loads config from config sources
func Load(ctx context.Context, cs ...Config) error {

View File

@ -25,18 +25,27 @@ func (c *defaultConfig) Init(opts ...Option) error {
return nil
}
func (c *defaultConfig) Load(ctx context.Context) error {
func (c *defaultConfig) Load(ctx context.Context, opts ...LoadOption) error {
for _, fn := range c.opts.BeforeLoad {
if err := fn(ctx, c); err != nil && !c.opts.AllowFail {
return err
}
}
options := NewLoadOptions(opts...)
mopts := []func(*mergo.Config){mergo.WithTypeCheck}
if options.Override {
mopts = append(mopts, mergo.WithOverride)
}
if options.Append {
mopts = append(mopts, mergo.WithAppendSlice)
}
src, err := rutil.Zero(c.opts.Struct)
if err == nil {
valueOf := reflect.ValueOf(src)
if err = c.fillValues(valueOf); err == nil {
err = mergo.Merge(c.opts.Struct, src, mergo.WithOverride, mergo.WithTypeCheck, mergo.WithAppendSlice)
err = mergo.Merge(c.opts.Struct, src, mopts...)
}
}
@ -232,7 +241,7 @@ func (c *defaultConfig) fillValues(valueOf reflect.Value) error {
return nil
}
func (c *defaultConfig) Save(ctx context.Context) error {
func (c *defaultConfig) Save(ctx context.Context, opts ...SaveOption) error {
for _, fn := range c.opts.BeforeSave {
if err := fn(ctx, c); err != nil && !c.opts.AllowFail {
return err

View File

@ -57,6 +57,52 @@ func NewOptions(opts ...Option) Options {
return options
}
// LoadOption function signature
type LoadOption func(o *LoadOptions)
// LoadOptions struct
type LoadOptions struct {
Override bool
Append bool
}
func NewLoadOptions(opts ...LoadOption) LoadOptions {
options := LoadOptions{}
for _, o := range opts {
o(&options)
}
return options
}
// LoadOverride override values when load
func LoadOverride(b bool) LoadOption {
return func(o *LoadOptions) {
o.Override = b
}
}
// LoadAppend override values when load
func LoadAppend(b bool) LoadOption {
return func(o *LoadOptions) {
o.Append = b
}
}
// SaveOption function signature
type SaveOption func(o *SaveOptions)
// SaveOptions struct
type SaveOptions struct {
}
func NewSaveOptions(opts ...SaveOption) SaveOptions {
options := SaveOptions{}
for _, o := range opts {
o(&options)
}
return options
}
// AllowFail allows config source to fail
func AllowFail(b bool) Option {
return func(o *Options) {