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// Copyright 2014 Canonical Ltd.
// Licensed under the LGPLv3, see LICENCE.client file for details.
package params
import (
"fmt"
)
// ErrorCode holds the class of an error in machine-readable format.
// It is also an error in its own right.
type ErrorCode string
func (code ErrorCode) Error() string {
return string(code)
}
func (code ErrorCode) ErrorCode() ErrorCode {
return code
}
const (
ErrNotFound ErrorCode = "not found"
ErrForbidden ErrorCode = "forbidden"
ErrBadRequest ErrorCode = "bad request"
ErrUnauthorized ErrorCode = "unauthorized"
ErrAlreadyExists ErrorCode = "already exists"
ErrNoAdminCredsProvided ErrorCode = "no admin credentials provided"
ErrMethodNotAllowed ErrorCode = "method not allowed"
ErrServiceUnavailable ErrorCode = "service unavailable"
ErrInternalServer ErrorCode = "internal server error"
)
// Error represents an error - it is returned for any response that fails.
type Error struct {
Message string `json:"message,omitempty"`
Code ErrorCode `json:"code,omitempty"`
}
// NewError returns a new *Error with the given error code
// and message.
func NewError(code ErrorCode, f string, a ...interface{}) error {
return &Error{
Message: fmt.Sprintf(f, a...),
Code: code,
}
}
// Error implements error.Error.
func (e *Error) Error() string {
return e.Message
}
// ErrorCode holds the class of the error in machine readable format.
func (e *Error) ErrorCode() string {
return e.Code.Error()
}
// Cause implements errgo.Causer.Cause.
func (e *Error) Cause() error {
if e.Code != "" {
return e.Code
}
return nil
}
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