2705ca5bf3
Layered configuration management (defaults → file → env → flags) with viper backend, YAML persistence via go-io Medium, and framework service. Moved from forge.lthn.ai/core/go/pkg/config to standalone module. Co-Authored-By: Virgil <virgil@lethean.io>
83 lines
2.1 KiB
Go
83 lines
2.1 KiB
Go
package config
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import (
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"context"
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coreerr "forge.lthn.ai/core/go-log"
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"forge.lthn.ai/core/go-io"
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core "forge.lthn.ai/core/go/pkg/framework/core"
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)
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// Service wraps Config as a framework service with lifecycle support.
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type Service struct {
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*core.ServiceRuntime[ServiceOptions]
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config *Config
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}
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// ServiceOptions holds configuration for the config service.
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type ServiceOptions struct {
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// Path overrides the default config file path.
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Path string
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// Medium overrides the default storage medium.
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Medium io.Medium
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}
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// NewConfigService creates a new config service factory for the Core framework.
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// Register it with core.WithService(config.NewConfigService).
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func NewConfigService(c *core.Core) (any, error) {
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svc := &Service{
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ServiceRuntime: core.NewServiceRuntime(c, ServiceOptions{}),
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}
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return svc, nil
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}
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// OnStartup loads the configuration file during application startup.
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func (s *Service) OnStartup(_ context.Context) error {
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opts := s.Opts()
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var configOpts []Option
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if opts.Path != "" {
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configOpts = append(configOpts, WithPath(opts.Path))
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}
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if opts.Medium != nil {
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configOpts = append(configOpts, WithMedium(opts.Medium))
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}
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cfg, err := New(configOpts...)
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if err != nil {
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return err
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}
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s.config = cfg
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return nil
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}
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// Get retrieves a configuration value by key.
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func (s *Service) Get(key string, out any) error {
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if s.config == nil {
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return coreerr.E("config.Service.Get", "config not loaded", nil)
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}
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return s.config.Get(key, out)
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}
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// Set stores a configuration value by key.
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func (s *Service) Set(key string, v any) error {
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if s.config == nil {
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return coreerr.E("config.Service.Set", "config not loaded", nil)
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}
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return s.config.Set(key, v)
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}
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// LoadFile merges a configuration file into the central configuration.
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func (s *Service) LoadFile(m io.Medium, path string) error {
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if s.config == nil {
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return coreerr.E("config.Service.LoadFile", "config not loaded", nil)
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}
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return s.config.LoadFile(m, path)
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}
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// Ensure Service implements core.Config and Startable at compile time.
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var (
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_ core.Config = (*Service)(nil)
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_ core.Startable = (*Service)(nil)
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)
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