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
}