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badger.go
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badger.go
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/*
* Copyright 2021 National Library of Norway.
*
* 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 badgeridx
import (
"os"
"github.com/dgraph-io/badger/v4"
"github.com/dgraph-io/badger/v4/options"
"github.com/rs/zerolog/log"
)
// badgerLogger is a log adapter that implements badger.Logger
type badgerLogger struct {
prefix string
}
func (l badgerLogger) Errorf(fmt string, args ...interface{}) {
log.Error().Msgf(l.prefix+fmt, args...)
}
func (l badgerLogger) Warningf(fmt string, args ...interface{}) {
log.Warn().Msgf(l.prefix+fmt, args...)
}
func (l badgerLogger) Infof(fmt string, args ...interface{}) {
log.Trace().Msgf(l.prefix+fmt, args...)
}
func (l badgerLogger) Debugf(fmt string, args ...interface{}) {
log.Trace().Msgf(l.prefix+fmt, args...)
}
func newBadgerDB(dir string, compression options.CompressionType, readOnly bool, silent bool) (*badger.DB, error) {
// create database directory if not exists
if err := os.MkdirAll(dir, 0777); err != nil {
return nil, err
}
var logger badger.Logger
if !silent {
logger = badgerLogger{prefix: "Badger: "}
}
opts := badger.DefaultOptions(dir).
WithLogger(logger).
WithCompression(compression).
WithReadOnly(readOnly)
if compression == options.ZSTD {
opts.WithZSTDCompressionLevel(5)
}
return badger.Open(opts)
}