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config.go
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config.go
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// Copyright (c) 2019 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package models
import (
"errors"
"fmt"
)
var validIDSchemes = []IDSchemeType{
TypeLegacy,
TypeQuoted,
TypePrependMeta,
TypeGraphite,
}
// Validate validates that the scheme type is valid.
func (t IDSchemeType) Validate() error {
if t == TypeDefault {
return errors.New("id scheme type not set")
}
if t >= TypeLegacy && t <= TypeGraphite {
return nil
}
return fmt.Errorf("invalid config id schema type '%v': should be one of %v",
t, validIDSchemes)
}
func (t IDSchemeType) String() string {
switch t {
case TypeDefault:
return ""
case TypeLegacy:
return "legacy"
case TypeQuoted:
return "quoted"
case TypePrependMeta:
return "prepend_meta"
case TypeGraphite:
return "graphite"
default:
// Should never get here.
return "unknown"
}
}
// UnmarshalYAML unmarshals a stored merics type.
func (t *IDSchemeType) UnmarshalYAML(unmarshal func(interface{}) error) error {
var str string
if err := unmarshal(&str); err != nil {
return err
}
for _, valid := range validIDSchemes {
if valid == TypeGraphite {
// NB: while the graphite scheme is valid, it is not available to choose
// as a general ID scheme; instead, it is set on any metric coming through
// the graphite ingestion path.
continue
}
if str == valid.String() {
*t = valid
return nil
}
}
return fmt.Errorf("invalid MetricsType '%s' valid types are: %v",
str, validIDSchemes)
}