forked from hidevopsio/hiboot-data
/
datasource.go
81 lines (68 loc) · 1.63 KB
/
datasource.go
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// Copyright 2018 John Deng (hi.devops.io@gmail.com).
//
// 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 bolt
import (
"github.com/boltdb/bolt"
"hidevops.io/hiboot/pkg/log"
"sync"
"time"
)
type DataSource interface {
Open(properties *properties) error
Close() error
IsOpened() bool
DB() *bolt.DB
}
type dataSource struct {
db *bolt.DB
}
var ds *dataSource
var do sync.Once
func GetDataSource() *dataSource {
do.Do(func() {
ds = new(dataSource)
})
return ds
}
func (d *dataSource) DB() *bolt.DB {
return d.db
}
func (d *dataSource) Open(properties *properties) error {
if properties == nil {
return InvalidPropertiesError
}
var err error
d.db, err = bolt.Open(properties.Database,
properties.Mode,
&bolt.Options{Timeout: time.Duration(properties.Timeout) * time.Second},
)
if err != nil {
if d.db != nil {
defer d.db.Close()
}
} else {
log.Infof("dataSource %v connected", properties.Database)
}
return err
}
// Close database
func (d *dataSource) Close() error {
err := d.db.Close()
d.db = nil
return err
}
// IsOpened check if db is opened
func (d *dataSource) IsOpened() bool {
return d.db != nil
}