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funcs.go
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funcs.go
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/*
* Copyright 2018-2023, CS Systemes d'Information, http://csgroup.eu
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package fail
import (
"github.com/sirupsen/logrus"
"google.golang.org/grpc/codes"
grpcstatus "google.golang.org/grpc/status"
)
// AddConsequence adds an error 'err' to the list of consequences
func AddConsequence(err error, cons error) error {
if err != nil {
if conseq, ok := err.(consequencer); ok {
if cons != nil {
convErr := ConvertError(cons)
nerr := conseq.AddConsequence(convErr)
return nerr
}
return err
}
if cons != nil {
logrus.Errorf("trying to add error [%s] to existing error [%s] but failed", cons, err)
}
}
return err
}
// Consequences returns the list of consequences
func Consequences(err error) []error {
if err != nil {
if conseq, ok := err.(consequencer); ok {
return conseq.Consequences()
}
}
return []error{}
}
// Annotate ...
func Annotate(err error, key string, content interface{}) Error {
if err != nil {
enrich, ok := err.(Error)
if !ok {
enrich = NewError(err.Error())
}
if key != "" {
enrich.Annotate(key, content)
}
return enrich
}
return nil
}
// IsGRPCError tells if 'err' is of GRPC kind
func IsGRPCError(err error) bool {
if err != nil {
_, ok := grpcstatus.FromError(err)
return ok
}
return false
}
// FromGRPCStatus translates GRPC status to error
func FromGRPCStatus(err error) Error {
if err == nil {
return InvalidParameterCannotBeNilError("err")
}
if _, ok := err.(Error); ok {
return err.(Error)
}
message := grpcstatus.Convert(err).Message()
code := grpcstatus.Code(err)
common := newError(nil, nil, message)
common.grpcCode = code
switch code {
case codes.DeadlineExceeded:
return &ErrTimeout{errorCore: common, dur: 0}
case codes.Aborted:
return &ErrAborted{common}
case codes.FailedPrecondition:
return &ErrInvalidParameter{
errorCore: common,
}
case codes.AlreadyExists:
return &ErrDuplicate{common}
case codes.InvalidArgument:
return &ErrInvalidRequest{common}
case codes.NotFound:
return &ErrNotFound{common}
case codes.PermissionDenied:
return &ErrForbidden{common}
case codes.ResourceExhausted:
return &ErrOverload{common}
case codes.OutOfRange:
return &ErrOverflow{errorCore: common, limit: 0}
case codes.Unimplemented:
return &ErrNotImplemented{common}
case codes.Internal:
return &ErrRuntimePanic{common}
case codes.DataLoss:
return &ErrInconsistent{common}
case codes.Unauthenticated:
return &ErrNotAuthenticated{common}
}
return common
}
// ToGRPCStatus translates an error to a GRPC status
func ToGRPCStatus(err error) error {
if err == nil {
return InvalidParameterCannotBeNilError("err")
}
if casted, ok := err.(Error); ok {
return casted.ToGRPCStatus()
}
return grpcstatus.Errorf(codes.Unknown, err.Error())
}
// Wrap creates a new error with a message 'msg' and a causer error 'cause'
func Wrap(cause error, msg ...interface{}) Error {
if cause == nil {
if len(msg) == 0 {
return nil
}
return newError(nil, nil, msg...)
}
switch rerr := cause.(type) {
case *ErrorList:
return NewErrorListComplete(rerr.ToErrorSlice(), rerr.Cause(), rerr.Consequences(), msg...)
case *ErrUnqualified:
return newError(cause, rerr.Consequences(), msg...)
case *ErrWarning:
return WarningErrorWithCauseAndConsequences(cause, rerr.Consequences(), msg...)
case *ErrTimeout:
return TimeoutErrorWithCauseAndConsequences(cause, rerr.dur, rerr.Consequences(), msg...)
case *ErrNotFound:
return NotFoundErrorWithCause(cause, rerr.Consequences(), msg...)
case *ErrAborted:
return AbortedErrorWithCauseAndConsequences(cause, rerr.Consequences(), msg...)
case *ErrRuntimePanic:
var wrapArgs []interface{}
wrapArgs = append(wrapArgs, rerr.UnformattedError())
wrapArgs = append(wrapArgs, msg...)
return RuntimePanicErrorWithCauseAndConsequences(cause, rerr.Consequences(), false, wrapArgs)
case *ErrNotAvailable:
return NotAvailableErrorWithCause(cause, rerr.Consequences(), msg...)
case *ErrDuplicate:
return DuplicateErrorWithCause(cause, rerr.Consequences(), msg...)
case *ErrInvalidRequest:
return InvalidRequestErrorWithCause(cause, rerr.Consequences(), msg...)
case *ErrSyntax:
return SyntaxErrorWithCause(cause, rerr.Consequences(), msg...)
case *ErrNotAuthenticated:
return NotAuthenticatedErrorWithCause(cause, rerr.Consequences(), msg...)
case *ErrForbidden:
return ForbiddenErrorWithCause(cause, rerr.Consequences(), msg...)
case *ErrOverflow:
return OverflowErrorWithCause(cause, rerr.limit, rerr.Consequences(), msg...)
case *ErrOverload:
return OverloadErrorWithCause(cause, rerr.Consequences(), msg...)
case *ErrNotImplemented:
return NotImplementedErrorWithCauseAndConsequences(cause, rerr.Consequences(), msg...)
case *ErrInvalidInstance:
return InvalidInstanceErrorWithCause(cause, rerr.Consequences(), msg...)
case *ErrInvalidParameter:
return InvalidParameterErrorWithCauseAndConsequences(cause, rerr.Consequences(), rerr.what, rerr.skip, msg...)
case *ErrInvalidInstanceContent:
return InvalidInstanceContentErrorWithCause(cause, rerr.Consequences(), rerr.what, rerr.why, msg...)
case *ErrInconsistent:
return InconsistentErrorWithCause(cause, rerr.Consequences(), msg...)
case *ErrExecution:
return ExecutionErrorWithCause(cause, rerr.Consequences(), msg...)
case *ErrAlteredNothing:
return AlteredNothingErrorWithCause(cause, rerr.Consequences(), msg...)
case *ErrUnknown:
return UnknownErrorWithCause(cause, rerr.Consequences(), msg...)
case Error:
return newError(cause, rerr.Consequences(), msg...)
default:
return newError(cause, nil, msg...)
}
}
func lastUnwrapOrNil(in error) (err error) {
if in == nil {
return nil
}
last := in
for {
err = last
u, ok := last.(interface {
Unwrap() error
})
if !ok {
break
}
last = u.Unwrap()
}
return err
}
func lastUnwrap(in error) (err error) {
if in == nil {
return nil
}
last := in
for {
err = last
u, ok := last.(interface {
Unwrap() error
})
if !ok {
break
}
tmpLast := u.Unwrap()
if tmpLast != nil {
last = tmpLast
} else {
break
}
}
return err
}
// RootCause follows the chain of causes / wrapped errors and returns the last not-nil error
func RootCause(err error) (resp error) {
return lastUnwrap(err)
}
// Cause returns the direct cause of an error if it implements the causer interface and that cause is not-nil
// in any other case, returns the unmodified error 'err'
func Cause(err error) (resp error) {
if ci, ok := err.(causer); ok {
cau := ci.Cause()
if cau != nil {
return cau
}
return err
}
if u, ok := err.(interface {
Unwrap() error
}); ok {
cau := u.Unwrap()
if cau != nil {
return cau
}
return err
}
return err
}
// ConvertError converts an error to a fail.Error
func ConvertError(err error) Error {
if err != nil {
if casted, ok := err.(Error); ok {
return casted
}
return NewErrorWithCause(Cause(err), err.Error())
}
return nil
}