package service // import "go.unistack.org/micro-config-service/v3" import ( "context" "fmt" "github.com/imdario/mergo" pbmicro "go.unistack.org/micro-config-service/v3/micro" pb "go.unistack.org/micro-config-service/v3/proto" "go.unistack.org/micro/v3/client" "go.unistack.org/micro/v3/config" rutil "go.unistack.org/micro/v3/util/reflect" ) var DefaultStructTag = "service" type serviceConfig struct { opts config.Options service string client pbmicro.ConfigClient } func (c *serviceConfig) Options() config.Options { return c.opts } func (c *serviceConfig) Init(opts ...config.Option) error { for _, o := range opts { o(&c.opts) } var cli client.Client if c.opts.Context != nil { if v, ok := c.opts.Context.Value(serviceKey{}).(string); ok && v != "" { c.service = v } if v, ok := c.opts.Context.Value(clientKey{}).(client.Client); ok { cli = v } } if cli == nil { err := fmt.Errorf("missing client option") c.opts.Logger.Error(c.opts.Context, err) if !c.opts.AllowFail { return err } return nil } if c.service == "" { err := fmt.Errorf("missing Service option") c.opts.Logger.Error(c.opts.Context, err) if !c.opts.AllowFail { return err } return nil } c.client = pbmicro.NewConfigClient(c.service, cli) return nil } func (c *serviceConfig) Load(ctx context.Context, opts ...config.LoadOption) error { if err := config.DefaultBeforeLoad(ctx, c); err != nil { return err } rsp, err := c.client.Load(ctx, &pb.LoadRequest{Service: c.service}) if err != nil { c.opts.Logger.Errorf(ctx, "service load error: %v", err) if !c.opts.AllowFail { return fmt.Errorf("failed to load config: %w", err) } return config.DefaultAfterLoad(ctx, c) } options := config.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 { err = c.opts.Codec.Unmarshal(rsp.Config, src) if err == nil { err = mergo.Merge(c.opts.Struct, src, mopts...) } } if err != nil { c.opts.Logger.Errorf(ctx, "service load error: %v", err) if !c.opts.AllowFail { return fmt.Errorf("failed to load config: %w", err) } } if err := config.DefaultAfterLoad(ctx, c); err != nil { return err } return nil } func (c *serviceConfig) Save(ctx context.Context, opts ...config.SaveOption) error { if err := config.DefaultBeforeSave(ctx, c); err != nil { return err } buf, err := c.opts.Codec.Marshal(c.opts.Struct) if err == nil { _, err = c.client.Save(ctx, &pb.SaveRequest{Service: c.service, Config: buf}) } if err != nil { c.opts.Logger.Errorf(ctx, "service save error: %v", err) if !c.opts.AllowFail { return fmt.Errorf("failed to save config: %w", err) } } if err := config.DefaultAfterSave(ctx, c); err != nil { return err } return nil } func (c *serviceConfig) String() string { return "service" } func (c *serviceConfig) Name() string { return c.opts.Name } func (c *serviceConfig) Watch(ctx context.Context, opts ...config.WatchOption) (config.Watcher, error) { return nil, fmt.Errorf("not implemented") } func NewConfig(opts ...config.Option) config.Config { options := config.NewOptions(opts...) if len(options.StructTag) == 0 { options.StructTag = DefaultStructTag } return &serviceConfig{opts: options} }