func writeLinkBagCollectionPointer(buf *bytes.Buffer, linkBag *oschema.OLinkBag) error {
// (treePointer:collectionPointer)(changes)
// where collectionPtr = (fileId:long)(pageIndex:long)(pageOffset:int)
err := rw.WriteLong(buf, linkBag.GetFileID())
if err != nil {
return oerror.NewTrace(err)
}
err = rw.WriteLong(buf, linkBag.GetPageIndex())
if err != nil {
return oerror.NewTrace(err)
}
return rw.WriteInt(buf, linkBag.GetPageOffset())
}
//
// UpdateRecord should be used update an existing record in the OrientDB database.
// It does the REQUEST_RECORD_UPDATE OrientDB cmd (network binary protocol)
//
func UpdateRecord(dbc *DBClient, doc *oschema.ODocument) error {
dbc.buf.Reset()
err := writeCommandAndSessionId(dbc, REQUEST_RECORD_UPDATE)
if err != nil {
return oerror.NewTrace(err)
}
if doc.RID.ClusterID < 0 || doc.RID.ClusterPos < 0 {
return errors.New("Document is not updateable - has negative RID values")
}
err = rw.WriteShort(dbc.buf, doc.RID.ClusterID)
if err != nil {
return oerror.NewTrace(err)
}
err = rw.WriteLong(dbc.buf, doc.RID.ClusterPos)
if err != nil {
return oerror.NewTrace(err)
}
// update-content flag
err = rw.WriteBool(dbc.buf, true)
if err != nil {
return oerror.NewTrace(err)
}
// serialized-doc
serde := dbc.RecordSerDes[int(dbc.serializationVersion)]
// this writes the serialized record to dbc.buf
serializedBytes, err := serde.Serialize(dbc, doc)
if err != nil {
return oerror.NewTrace(err)
}
err = rw.WriteBytes(dbc.buf, serializedBytes)
if err != nil {
return oerror.NewTrace(err)
}
// record version
err = rw.WriteInt(dbc.buf, doc.Version)
if err != nil {
return oerror.NewTrace(err)
}
// record-type: document
err = rw.WriteByte(dbc.buf, byte('d')) // TODO: how support 'b' (raw bytes) & 'f' (flat data)?
if err != nil {
return oerror.NewTrace(err)
}
// mode: synchronous
err = rw.WriteByte(dbc.buf, 0x0)
if err != nil {
return oerror.NewTrace(err)
}
// send to the OrientDB server
_, err = dbc.conx.Write(dbc.buf.Bytes())
if err != nil {
return oerror.NewTrace(err)
}
/* ---[ Read Response ]--- */
err = readStatusCodeAndSessionId(dbc)
if err != nil {
return oerror.NewTrace(err)
}
doc.Version, err = rw.ReadInt(dbc.conx)
if err != nil {
return oerror.NewTrace(err)
}
nCollChanges, err := rw.ReadInt(dbc.conx)
if err != nil {
return oerror.NewTrace(err)
}
if nCollChanges != 0 {
// if > 0, then have to deal with RidBag mgmt:
// [(uuid-most-sig-bits:long)(uuid-least-sig-bits:long)(updated-file-id:long)(updated-page-index:long)(updated-page-offset:int)]
panic("CreateRecord: Found case where number-collection-changes is not zero -> log case and impl code to handle")
}
return nil
}
func deleteByRID(dbc *DBClient, rid string, recVersion int32, async bool) error {
dbc.buf.Reset()
orid := oschema.NewORIDFromString(rid)
err := writeCommandAndSessionId(dbc, REQUEST_RECORD_DELETE)
if err != nil {
return err
}
err = rw.WriteShort(dbc.buf, orid.ClusterID)
if err != nil {
return err
}
err = rw.WriteLong(dbc.buf, orid.ClusterPos)
if err != nil {
return err
}
err = rw.WriteInt(dbc.buf, recVersion)
if err != nil {
return err
}
// sync mode ; 0 = synchronous; 1 = asynchronous
var syncMode byte
if async {
syncMode = byte(1)
}
err = rw.WriteByte(dbc.buf, syncMode)
if err != nil {
return err
}
// send to the OrientDB server
_, err = dbc.conx.Write(dbc.buf.Bytes())
if err != nil {
return err
}
/* ---[ Read Response ]--- */
err = readStatusCodeAndSessionId(dbc)
if err != nil {
return err
}
payloadStatus, err := rw.ReadByte(dbc.conx)
if err != nil {
return err
}
// status 1 means record was deleted;
// status 0 means record was not deleted (either failed or didn't exist)
if payloadStatus == byte(0) {
return fmt.Errorf("Server reports record %s was not deleted. Either failed or did not exist.",
rid)
}
return nil
}
//
// FetchRecordByRID takes an ORID and reads that record from the database.
// NOTE: for now I'm assuming all records are Documents (they can also be "raw bytes" or "flat data")
// and for some reason I don't understand, multiple records can be returned, so I'm returning
// a slice of ODocument
//
// TODO: may also want to expose options: ignoreCache, loadTombstones bool
// TODO: need to properly handle fetchPlan
func FetchRecordByRID(dbc *DBClient, orid oschema.ORID, fetchPlan string) ([]*oschema.ODocument, error) {
dbc.buf.Reset()
err := writeCommandAndSessionId(dbc, REQUEST_RECORD_LOAD)
if err != nil {
return nil, oerror.NewTrace(err)
}
err = rw.WriteShort(dbc.buf, orid.ClusterID)
if err != nil {
return nil, oerror.NewTrace(err)
}
err = rw.WriteLong(dbc.buf, orid.ClusterPos)
if err != nil {
return nil, oerror.NewTrace(err)
}
err = rw.WriteString(dbc.buf, fetchPlan)
if err != nil {
return nil, oerror.NewTrace(err)
}
ignoreCache := true // hardcoding for now
err = rw.WriteBool(dbc.buf, ignoreCache)
if err != nil {
return nil, oerror.NewTrace(err)
}
loadTombstones := false // hardcoding for now
err = rw.WriteBool(dbc.buf, loadTombstones)
if err != nil {
return nil, oerror.NewTrace(err)
}
// send to the OrientDB server
_, err = dbc.conx.Write(dbc.buf.Bytes())
if err != nil {
return nil, oerror.NewTrace(err)
}
/* ---[ Read Response ]--- */
err = readStatusCodeAndSessionId(dbc)
if err != nil {
return nil, oerror.NewTrace(err)
}
// this query can return multiple records (though I don't understand why)
// so must do this in a loop
docs := make([]*oschema.ODocument, 0, 1)
for {
payloadStatus, err := rw.ReadByte(dbc.conx)
if err != nil {
return nil, oerror.NewTrace(err)
}
if payloadStatus == byte(0) {
break
}
rectype, err := rw.ReadByte(dbc.conx)
if err != nil {
return nil, oerror.NewTrace(err)
}
recversion, err := rw.ReadInt(dbc.conx)
if err != nil {
return nil, oerror.NewTrace(err)
}
databytes, err := rw.ReadBytes(dbc.conx)
if err != nil {
return nil, oerror.NewTrace(err)
}
ogl.Debugf("rectype:%v, recversion:%v, len(databytes):%v\n", rectype, recversion, len(databytes))
if rectype == 'd' {
// we don't know the classname so set empty value
doc := oschema.NewDocument("")
doc.RID = orid
doc.Version = recversion
// the first byte specifies record serialization version
// use it to look up serializer
serde := dbc.RecordSerDes[int(databytes[0])]
// then strip off the version byte and send the data to the serde
err = serde.Deserialize(dbc, doc, obuf.NewReadBuffer(databytes[1:]))
if err != nil {
return nil, fmt.Errorf("ERROR in Deserialize for rid %v: %v\n", orid, err)
}
docs = append(docs, doc)
} else {
return nil,
fmt.Errorf("Only `document` records are currently supported by the client. Record returned was type: %v", rectype)
}
}
return docs, nil
}
//
// loadConfigRecord loads record #0:0 for the current database, caching
// some of the information returned into OStorageConfiguration
//
func loadConfigRecord(dbc *DBClient) (schemaRID string, err error) {
// The config record comes back as type 'b' (raw bytes), which should
// just be converted to a string then tokenized by the pipe char
dbc.buf.Reset()
var (
clusterId int16
clusterPos int64
)
err = writeCommandAndSessionId(dbc, REQUEST_RECORD_LOAD)
if err != nil {
return schemaRID, err
}
clusterId = 0
err = rw.WriteShort(dbc.buf, clusterId)
if err != nil {
return schemaRID, err
}
clusterPos = 0
err = rw.WriteLong(dbc.buf, clusterPos)
if err != nil {
return schemaRID, err
}
fetchPlan := "*:-1 index:0"
err = rw.WriteString(dbc.buf, fetchPlan)
if err != nil {
return schemaRID, err
}
ignoreCache := true
err = rw.WriteBool(dbc.buf, ignoreCache)
if err != nil {
return schemaRID, err
}
loadTombstones := true // based on Java client code
err = rw.WriteBool(dbc.buf, loadTombstones)
if err != nil {
return schemaRID, err
}
// send to the OrientDB server
_, err = dbc.conx.Write(dbc.buf.Bytes())
if err != nil {
return schemaRID, err
}
/* ---[ Read Response ]--- */
err = readStatusCodeAndSessionId(dbc)
if err != nil {
return schemaRID, err
}
payloadStatus, err := rw.ReadByte(dbc.conx)
if err != nil {
return schemaRID, err
}
if payloadStatus == byte(0) {
return schemaRID, errors.New("Payload status for #0:0 load was 0. No config data returned.")
}
rectype, err := rw.ReadByte(dbc.conx)
if err != nil {
return schemaRID, err
}
// this is the record version - don't see a reason to check or cache it right now
_, err = rw.ReadInt(dbc.conx)
if err != nil {
return schemaRID, err
}
databytes, err := rw.ReadBytes(dbc.conx)
if err != nil {
return schemaRID, err
}
if rectype != 'b' {
if err != nil {
return schemaRID, fmt.Errorf("Expected rectype %d, but was: %d", 'b', rectype)
}
}
payloadStatus, err = rw.ReadByte(dbc.conx)
if err != nil {
return schemaRID, err
}
if payloadStatus != byte(0) {
return schemaRID,
errors.New("Second Payload status for #0:0 load was not 0. More than one record returned unexpectedly")
}
err = parseConfigRecord(dbc.currDB, string(databytes))
if err != nil {
return schemaRID, err
}
schemaRID = dbc.currDB.StorageCfg.schemaRID
return schemaRID, err
}