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mc_constants.go
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mc_constants.go
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// Memcached binary protocol packet formats and constants.
package gomemcached
import "fmt"
type HeaderMagic int
const (
REQ_MAGIC = 0x80
RES_MAGIC = 0x81
)
type CommandCode uint8
const (
GET = CommandCode(0x00)
SET = CommandCode(0x01)
ADD = CommandCode(0x02)
REPLACE = CommandCode(0x03)
DELETE = CommandCode(0x04)
INCREMENT = CommandCode(0x05)
DECREMENT = CommandCode(0x06)
QUIT = CommandCode(0x07)
FLUSH = CommandCode(0x08)
GETQ = CommandCode(0x09)
NOOP = CommandCode(0x0a)
VERSION = CommandCode(0x0b)
GETK = CommandCode(0x0c)
GETKQ = CommandCode(0x0d)
APPEND = CommandCode(0x0e)
PREPEND = CommandCode(0x0f)
STAT = CommandCode(0x10)
SETQ = CommandCode(0x11)
ADDQ = CommandCode(0x12)
REPLACEQ = CommandCode(0x13)
DELETEQ = CommandCode(0x14)
INCREMENTQ = CommandCode(0x15)
DECREMENTQ = CommandCode(0x16)
QUITQ = CommandCode(0x17)
FLUSHQ = CommandCode(0x18)
APPENDQ = CommandCode(0x19)
PREPENDQ = CommandCode(0x1a)
RGET = CommandCode(0x30)
RSET = CommandCode(0x31)
RSETQ = CommandCode(0x32)
RAPPEND = CommandCode(0x33)
RAPPENDQ = CommandCode(0x34)
RPREPEND = CommandCode(0x35)
RPREPENDQ = CommandCode(0x36)
RDELETE = CommandCode(0x37)
RDELETEQ = CommandCode(0x38)
RINCR = CommandCode(0x39)
RINCRQ = CommandCode(0x3a)
RDECR = CommandCode(0x3b)
RDECRQ = CommandCode(0x3c)
TAP_CONNECT = CommandCode(0x40)
TAP_MUTATION = CommandCode(0x41)
TAP_DELETE = CommandCode(0x42)
TAP_FLUSH = CommandCode(0x43)
TAP_OPAQUE = CommandCode(0x44)
TAP_VBUCKET_SET = CommandCode(0x45)
TAP_CHECKPOINT_START = CommandCode(0x46)
TAP_CHECKPOINT_END = CommandCode(0x47)
)
type ResponseStatus int
const (
SUCCESS = 0x00
KEY_ENOENT = 0x01
KEY_EEXISTS = 0x02
E2BIG = 0x03
EINVAL = 0x04
NOT_STORED = 0x05
DELTA_BADVAL = 0x06
NOT_MY_VBUCKET = 0x07
UNKNOWN_COMMAND = 0x81
ENOMEM = 0x82
)
type TapFlags uint32
const (
BACKFILL = 0x01
DUMP = 0x02
LIST_VBUCKETS = 0x04
TAKEOVER_VBUCKETS = 0x08
SUPPORT_ACK = 0x10
REQUEST_KEYS_ONLY = 0x20
CHECKPOINT = 0x40
REGISTERED_CLIENT = 0x80
)
type MCRequest struct {
Opcode CommandCode
Cas uint64
Opaque uint32
VBucket uint16
Extras, Key, Body []byte
ResponseChannel chan MCResponse
}
func (req MCRequest) String() string {
return fmt.Sprintf("{MCRequest opcode=%s, bodylen=%d, key='%s'}",
req.Opcode, len(req.Body), req.Key)
}
type MCResponse struct {
Status uint16
Cas uint64
Extras, Key, Body []byte
Fatal bool
}
func (res MCResponse) String() string {
return fmt.Sprintf("{MCResponse status=%x keylen=%d, extralen=%d, bodylen=%d}",
res.Status, len(res.Key), len(res.Extras), len(res.Body))
}
func (res MCResponse) Error() string {
return fmt.Sprintf("MCResponse status=%x, msg: %s",
res.Status, string(res.Body))
}
type MCItem struct {
Cas uint64
Flags, Expiration uint32
Data []byte
}
const HDR_LEN = 24
// Mapping of CommandCode -> name of command (not exhaustive)
var CommandNames map[CommandCode]string
func init() {
CommandNames = make(map[CommandCode]string)
CommandNames[GET] = "GET"
CommandNames[SET] = "SET"
CommandNames[ADD] = "ADD"
CommandNames[REPLACE] = "REPLACE"
CommandNames[DELETE] = "DELETE"
CommandNames[INCREMENT] = "INCREMENT"
CommandNames[DECREMENT] = "DECREMENT"
CommandNames[QUIT] = "QUIT"
CommandNames[FLUSH] = "FLUSH"
CommandNames[GETQ] = "GETQ"
CommandNames[NOOP] = "NOOP"
CommandNames[VERSION] = "VERSION"
CommandNames[GETK] = "GETK"
CommandNames[GETKQ] = "GETKQ"
CommandNames[APPEND] = "APPEND"
CommandNames[PREPEND] = "PREPEND"
CommandNames[STAT] = "STAT"
CommandNames[SETQ] = "SETQ"
CommandNames[ADDQ] = "ADDQ"
CommandNames[REPLACEQ] = "REPLACEQ"
CommandNames[DELETEQ] = "DELETEQ"
CommandNames[INCREMENTQ] = "INCREMENTQ"
CommandNames[DECREMENTQ] = "DECREMENTQ"
CommandNames[QUITQ] = "QUITQ"
CommandNames[FLUSHQ] = "FLUSHQ"
CommandNames[APPENDQ] = "APPENDQ"
CommandNames[PREPENDQ] = "PREPENDQ"
CommandNames[RGET] = "RGET"
CommandNames[RSET] = "RSET"
CommandNames[RSETQ] = "RSETQ"
CommandNames[RAPPEND] = "RAPPEND"
CommandNames[RAPPENDQ] = "RAPPENDQ"
CommandNames[RPREPEND] = "RPREPEND"
CommandNames[RPREPENDQ] = "RPREPENDQ"
CommandNames[RDELETE] = "RDELETE"
CommandNames[RDELETEQ] = "RDELETEQ"
CommandNames[RINCR] = "RINCR"
CommandNames[RINCRQ] = "RINCRQ"
CommandNames[RDECR] = "RDECR"
CommandNames[RDECRQ] = "RDECRQ"
CommandNames[TAP_CONNECT] = "TAP_CONNECT"
CommandNames[TAP_MUTATION] = "TAP_MUTATION"
CommandNames[TAP_DELETE] = "TAP_DELETE"
CommandNames[TAP_FLUSH] = "TAP_FLUSH"
CommandNames[TAP_OPAQUE] = "TAP_OPAQUE"
CommandNames[TAP_VBUCKET_SET] = "TAP_VBUCKET_SET"
CommandNames[TAP_CHECKPOINT_START] = "TAP_CHECKPOINT_START"
CommandNames[TAP_CHECKPOINT_END] = "TAP_CHECKPOINT_END"
}
func (o CommandCode) String() (rv string) {
rv = CommandNames[o]
if rv == "" {
rv = fmt.Sprintf("0x%02x", int(o))
}
return rv
}