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Add Validator interface

Modules can now verify their own configurations
master
Matthew Holt 6 years ago
parent
commit
3eae6d43b6
  1. 16
      modules.go

16
modules.go

@ -138,6 +138,13 @@ func LoadModule(name string, rawMsg json.RawMessage) (interface{}, error) {
return nil, fmt.Errorf("decoding module config: %s: %v", mod.Name, err)
}
if validator, ok := val.(Validator); ok {
err := validator.Validate()
if err != nil {
return nil, fmt.Errorf("%s: invalid configuration: %v", mod.Name, err)
}
}
return val, nil
}
@ -170,6 +177,15 @@ func LoadModuleInlineName(moduleScope string, raw json.RawMessage) (interface{},
return val, nil
}
// Validator is implemented by modules which can verify that their
// configurations are valid. This method will be called after New()
// instantiations of modules (if implemented). Validation should
// always be fast (imperceptible running time) and an error should
// be returned only if the value's configuration is invalid.
type Validator interface {
Validate() error
}
var (
modules = make(map[string]Module)
modulesMu sync.Mutex

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