// UPR_FAILOVER_LOG, synchronous call.
func (client *Client) UprFailOverLog(
req *mc.MCRequest) ([][2]uint64, error) {
req.Opcode = UPR_FAILOVER_LOG // #OpCode
req.Opaque = 0xDEADBEEF // #Opaque
req.Key = []byte{} // #Key
req.Extras = []byte{} // #Extras
// Trasmit the request
if err := client.conn.Transmit(req); err != nil {
return nil, err
}
res := <-client.response // Wait for response from doRecieve()
if res.Opcode != UPR_FAILOVER_LOG {
err := fmt.Errorf("UprFailOverLog: unexpected #opcode", res.Opcode)
return nil, err
} else if req.Opaque != res.Opaque {
err := fmt.Errorf(
"UprFailOverLog: #opaque mismatch", req.Opaque, res.Opaque)
return nil, err
} else if len(res.Body)%16 != 0 {
err := fmt.Errorf(
"UprFailOverLog: Invalide body of length", len(res.Body))
return nil, err
} else if res.Status != mc.SUCCESS {
return nil, fmt.Errorf("UprOpen: Status", res.Status)
}
// Return the log
return parseFailoverLog(res.Body), nil
}
// UPR_OPEN, synchronous call.
func (client *Client) UprOpen(
req *mc.MCRequest, name string, seqNo, flags uint32) error {
if len(name) > 65535 {
log.Panicln("UprOpen: name cannot exceed 65535")
}
req.Opcode = UPR_OPEN // #OpCode
req.Key = []byte(name) // #Key
req.Extras = make([]byte, 8)
binary.BigEndian.PutUint32(req.Extras[:4], seqNo)
// #Extras.sequenceNo
// while consumer is opening the connection Type flag needs to be cleared.
binary.BigEndian.PutUint32(req.Extras[4:], flags)
// #Extras.flags
// Trasmit the request
if err := client.conn.Transmit(req); err != nil {
return err
}
client.name = name
res := <-client.response // Wait for response from doRecieve()
if res == nil {
return fmt.Errorf("UprOpen: closed")
} else if res.Opcode != UPR_OPEN {
return fmt.Errorf("UprOpen: unexpected #opcode", res.Opcode)
} else if req.Opaque != res.Opaque {
return fmt.Errorf("UprOpen: #opaque mismatch", req.Opaque, res.Opaque)
} else if res.Status != mc.SUCCESS {
return fmt.Errorf("UprOpen: Status", res.Status)
}
return nil
}
// UPR_STREAM_REQ, synchronous call.
func (client *Client) UprStream(
req *mc.MCRequest, flags uint32,
startSeqno, endSeqno, vuuid, highSeqno uint64) (*Stream, uint64, error) {
req.Opcode = UPR_STREAM_REQ // #OpCode
// #Opaque
req.Key = []byte{} // #Keys
req.Extras = make([]byte, 40)
binary.BigEndian.PutUint32(req.Extras[:4], flags)
binary.BigEndian.PutUint32(req.Extras[4:8], uint32(0))
binary.BigEndian.PutUint64(req.Extras[8:16], startSeqno)
binary.BigEndian.PutUint64(req.Extras[16:24], endSeqno)
binary.BigEndian.PutUint64(req.Extras[24:32], vuuid)
binary.BigEndian.PutUint64(req.Extras[32:40], highSeqno)
// #Extras
stream := client.NewStream(req.VBucket, vuuid, req.Opaque)
client.addStream(req.Opaque, stream)
if client.conn != nil {
if err := client.conn.Transmit(req); err != nil { // Transmit request
return nil, 0, err
}
} else {
err := fmt.Errorf("Trying to open a stream on a closed connection")
return nil, 0, err
}
res := <-client.response // Wait for response
if res == nil {
return nil, 0, errors.New("closed")
} else if res.Opcode != UPR_STREAM_REQ {
err := fmt.Errorf("UprStream: unexpected #opcode", res.Opcode)
return nil, 0, err
} else if req.Opaque != res.Opaque {
err := fmt.Errorf("UprStream: #opaque mismatch", req.Opaque, res.Opaque)
return nil, 0, err
}
// If not success, remove the Stream reference from client connection,
// that was optimistically added above.
if res.Status != mc.SUCCESS {
client.evictStream(req.Opaque)
}
// Check whether it is rollback
var err error
switch res.Status {
case mc.SUCCESS:
stream.Log = parseFailoverLog(res.Body)
log.Println("Stream req ", stream.Log)
return stream, 0, err
case ROLLBACK:
if len(res.Extras) != 8 {
err = fmt.Errorf("UprStream: Invalid rollback", res.Extras)
}
rollback := binary.BigEndian.Uint64(res.Extras)
return nil, rollback, err
default:
return nil, 0, fmt.Errorf("UprStream: Status", res.Status)
}
}
