Пример #1
0
func (udc *UpsideDownCouch) Open() (err error) {
	// install the merge operator
	udc.store.SetMergeOperator(&mergeOperator)

	// now open the kv store
	err = udc.store.Open()
	if err != nil {
		return
	}

	// start a writer for the open process
	var kvwriter store.KVWriter
	kvwriter, err = udc.store.Writer()
	if err != nil {
		return
	}
	defer func() {
		if cerr := kvwriter.Close(); err == nil && cerr != nil {
			err = cerr
		}
	}()

	var value []byte
	value, err = kvwriter.Get(VersionKey)
	if err != nil {
		return
	}

	// init new index OR load schema
	if value == nil {
		err = udc.init(kvwriter)
		if err != nil {
			return
		}
	} else {
		err = udc.loadSchema(kvwriter)
		if err != nil {
			return
		}
	}
	// set doc count
	udc.m.Lock()
	udc.docCount, err = udc.countDocs(kvwriter)
	udc.m.Unlock()
	return
}