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serviceutil.go
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serviceutil.go
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/*
* === This file is part of ALICE O² ===
*
* Copyright 2019-2020 CERN and copyright holders of ALICE O².
* Author: Teo Mrnjavac <teo.mrnjavac@cern.ch>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* In applying this license CERN does not waive the privileges and
* immunities granted to it by virtue of its status as an
* Intergovernmental Organization or submit itself to any jurisdiction.
*/
package local
import (
"errors"
"fmt"
"strings"
"github.com/spf13/viper"
"github.com/AliceO2Group/Control/configuration/cfgbackend"
"github.com/AliceO2Group/Control/configuration/componentcfg"
)
func (s *Service) queryToAbsPath(query *componentcfg.Query) (absolutePath string, err error) {
if query == nil {
return
}
var timestamp string
if len(query.Timestamp) == 0 {
keyPrefix := query.AbsoluteWithoutTimestamp()
if s.src.IsDir(keyPrefix) {
var keys []string
keys, err = s.src.GetKeysByPrefix(keyPrefix)
if err != nil {
return
}
timestamp, err = componentcfg.GetLatestTimestamp(keys, query)
if err != nil {
timestamp = "" // no timestamp keys found, we'll try to fall back to timestampless
}
}
} else {
timestamp = query.Timestamp
}
absolutePath = query.AbsoluteWithoutTimestamp() + componentcfg.SEPARATOR + timestamp
if exists, _ := s.src.Exists(absolutePath); exists && len(timestamp) > 0 {
err = nil
return
}
// falling back to timestampless configuration
absolutePath = query.AbsoluteWithoutTimestamp()
if exists, _ := s.src.Exists(absolutePath); exists {
err = nil
return
}
err = fmt.Errorf("no payload at configuration path %s", absolutePath)
return
}
func (s *Service) getStringMap(path string) map[string]string {
tree, err := s.src.GetRecursive(path)
if err != nil {
log.WithError(err).
WithField("path", path).
Warning("getStringMap from configuration backend failed, possibly rate limited")
return map[string]string{}
}
if tree.Type() == cfgbackend.IT_Map {
responseMap := tree.Map()
theMap := make(map[string]string, len(responseMap))
trimSpaces := viper.GetBool("trimSpaceInVarsFromConsulKV")
for k, v := range responseMap {
if v.Type() != cfgbackend.IT_Value {
continue
}
if trimmedValue := strings.TrimSpace(v.Value()); v.Value() != trimmedValue {
valueToStore := v.Value()
if trimSpaces {
log.WithError(errors.New("leading or trailing space in value")).
WithField("path", path).
WithField("key", k).
Warning("found unsanitized string value in configuration backend, returning whitespace-trimmed string")
valueToStore = trimmedValue
} else {
log.WithError(errors.New("leading or trailing space in value")).
WithField("path", path).
WithField("key", k).
Warning("found unsanitized string value in configuration backend, returning anyway")
}
theMap[k] = valueToStore
} else {
theMap[k] = v.Value()
}
}
return theMap
}
return map[string]string{}
}
func (s *Service) resolveComponentQuery(query *componentcfg.Query) (resolved *componentcfg.Query, err error) {
resolved = &componentcfg.Query{}
*resolved = *query
if _, err = s.queryToAbsPath(resolved); err == nil {
// requested path exists, return it
return
}
resolved = query.WithFallbackRunType()
if _, err = s.queryToAbsPath(resolved); err == nil {
// path with run type ANY exists, return it
return
}
resolved = query.WithFallbackRoleName()
if _, err = s.queryToAbsPath(resolved); err == nil {
// path with role name "any" exists, return it
return
}
resolved = resolved.WithFallbackRunType()
if _, err = s.queryToAbsPath(resolved); err == nil {
// path with run type ANY and role name "any" exists, return it
return
}
return nil, fmt.Errorf("could not resolve configuration path %s", query.AbsoluteRaw())
}