/
database.go
169 lines (141 loc) · 3.7 KB
/
database.go
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package config
import (
"errors"
"sort"
"strings"
"github.com/safing/portbase/database"
"github.com/safing/portbase/database/iterator"
"github.com/safing/portbase/database/query"
"github.com/safing/portbase/database/record"
"github.com/safing/portbase/database/storage"
"github.com/safing/portbase/log"
)
var (
dbController *database.Controller
)
// StorageInterface provices a storage.Interface to the configuration manager.
type StorageInterface struct {
storage.InjectBase
}
// Get returns a database record.
func (s *StorageInterface) Get(key string) (record.Record, error) {
opt, err := GetOption(key)
if err != nil {
return nil, storage.ErrNotFound
}
return opt.Export()
}
// Put stores a record in the database.
func (s *StorageInterface) Put(r record.Record) (record.Record, error) {
if r.Meta().Deleted > 0 {
return r, setConfigOption(r.DatabaseKey(), nil, false)
}
acc := r.GetAccessor(r)
if acc == nil {
return nil, errors.New("invalid data")
}
val, ok := acc.Get("Value")
if !ok || val == nil {
err := setConfigOption(r.DatabaseKey(), nil, false)
if err != nil {
return nil, err
}
return s.Get(r.DatabaseKey())
}
option, err := GetOption(r.DatabaseKey())
if err != nil {
return nil, err
}
var value interface{}
switch option.OptType {
case OptTypeString:
value, ok = acc.GetString("Value")
case OptTypeStringArray:
value, ok = acc.GetStringArray("Value")
case OptTypeInt:
value, ok = acc.GetInt("Value")
case OptTypeBool:
value, ok = acc.GetBool("Value")
}
if !ok {
return nil, errors.New("received invalid value in \"Value\"")
}
if err := setConfigOption(r.DatabaseKey(), value, false); err != nil {
return nil, err
}
return option.Export()
}
// Delete deletes a record from the database.
func (s *StorageInterface) Delete(key string) error {
return setConfigOption(key, nil, false)
}
// Query returns a an iterator for the supplied query.
func (s *StorageInterface) Query(q *query.Query, local, internal bool) (*iterator.Iterator, error) {
optionsLock.RLock()
defer optionsLock.RUnlock()
it := iterator.New()
var opts []*Option
for _, opt := range options {
if strings.HasPrefix(opt.Key, q.DatabaseKeyPrefix()) {
opts = append(opts, opt)
}
}
go s.processQuery(it, opts)
return it, nil
}
func (s *StorageInterface) processQuery(it *iterator.Iterator, opts []*Option) {
sort.Sort(sortByKey(opts))
for _, opt := range opts {
r, err := opt.Export()
if err != nil {
it.Finish(err)
return
}
it.Next <- r
}
it.Finish(nil)
}
// ReadOnly returns whether the database is read only.
func (s *StorageInterface) ReadOnly() bool {
return false
}
func registerAsDatabase() error {
_, err := database.Register(&database.Database{
Name: "config",
Description: "Configuration Manager",
StorageType: "injected",
})
if err != nil {
return err
}
controller, err := database.InjectDatabase("config", &StorageInterface{})
if err != nil {
return err
}
dbController = controller
return nil
}
// handleOptionUpdate updates the expertise and release level options,
// if required, and eventually pushes a update for the option.
// The caller must hold the option lock.
func handleOptionUpdate(option *Option, push bool) {
if expertiseLevelOptionFlag.IsSet() && option == expertiseLevelOption {
updateExpertiseLevel()
}
if releaseLevelOptionFlag.IsSet() && option == releaseLevelOption {
updateReleaseLevel()
}
if push {
pushUpdate(option)
}
}
// pushUpdate pushes an database update notification for option.
// The caller must hold the option lock.
func pushUpdate(option *Option) {
r, err := option.export()
if err != nil {
log.Errorf("failed to export option to push update: %s", err)
} else {
dbController.PushUpdate(r)
}
}