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package kafka
import (
"bufio"
"bytes"
)
type memberGroupMetadata struct {
// MemberID assigned by the group coordinator or null if joining for the
// first time.
MemberID string
Metadata groupMetadata
}
type groupMetadata struct {
Version int16
Topics []string
UserData []byte
}
func (t groupMetadata) size() int32 {
return sizeofInt16(t.Version) +
sizeofStringArray(t.Topics) +
sizeofBytes(t.UserData)
}
func (t groupMetadata) writeTo(w *bufio.Writer) {
writeInt16(w, t.Version)
writeStringArray(w, t.Topics)
writeBytes(w, t.UserData)
}
func (t groupMetadata) bytes() []byte {
buf := bytes.NewBuffer(nil)
w := bufio.NewWriter(buf)
t.writeTo(w)
w.Flush()
return buf.Bytes()
}
func (t *groupMetadata) readFrom(r *bufio.Reader, size int) (remain int, err error) {
if remain, err = readInt16(r, size, &t.Version); err != nil {
return
}
if remain, err = readStringArray(r, remain, &t.Topics); err != nil {
return
}
if remain, err = readBytes(r, remain, &t.UserData); err != nil {
return
}
return
}
type joinGroupRequestGroupProtocolV1 struct {
ProtocolName string
ProtocolMetadata []byte
}
func (t joinGroupRequestGroupProtocolV1) size() int32 {
return sizeofString(t.ProtocolName) +
sizeofBytes(t.ProtocolMetadata)
}
func (t joinGroupRequestGroupProtocolV1) writeTo(w *bufio.Writer) {
writeString(w, t.ProtocolName)
writeBytes(w, t.ProtocolMetadata)
}
type joinGroupRequestV1 struct {
// GroupID holds the unique group identifier
GroupID string
// SessionTimeout holds the coordinator considers the consumer dead if it
// receives no heartbeat after this timeout in ms.
SessionTimeout int32
// RebalanceTimeout holds the maximum time that the coordinator will wait
// for each member to rejoin when rebalancing the group in ms
RebalanceTimeout int32
// MemberID assigned by the group coordinator or the zero string if joining
// for the first time.
MemberID string
// ProtocolType holds the unique name for class of protocols implemented by group
ProtocolType string
// GroupProtocols holds the list of protocols that the member supports
GroupProtocols []joinGroupRequestGroupProtocolV1
}
func (t joinGroupRequestV1) size() int32 {
return sizeofString(t.GroupID) +
sizeofInt32(t.SessionTimeout) +
sizeofInt32(t.RebalanceTimeout) +
sizeofString(t.MemberID) +
sizeofString(t.ProtocolType) +
sizeofArray(len(t.GroupProtocols), func(i int) int32 { return t.GroupProtocols[i].size() })
}
func (t joinGroupRequestV1) writeTo(w *bufio.Writer) {
writeString(w, t.GroupID)
writeInt32(w, t.SessionTimeout)
writeInt32(w, t.RebalanceTimeout)
writeString(w, t.MemberID)
writeString(w, t.ProtocolType)
writeArray(w, len(t.GroupProtocols), func(i int) { t.GroupProtocols[i].writeTo(w) })
}
type joinGroupResponseMemberV1 struct {
// MemberID assigned by the group coordinator
MemberID string
MemberMetadata []byte
}
func (t joinGroupResponseMemberV1) size() int32 {
return sizeofString(t.MemberID) +
sizeofBytes(t.MemberMetadata)
}
func (t joinGroupResponseMemberV1) writeTo(w *bufio.Writer) {
writeString(w, t.MemberID)
writeBytes(w, t.MemberMetadata)
}
func (t *joinGroupResponseMemberV1) readFrom(r *bufio.Reader, size int) (remain int, err error) {
if remain, err = readString(r, size, &t.MemberID); err != nil {
return
}
if remain, err = readBytes(r, remain, &t.MemberMetadata); err != nil {
return
}
return
}
type joinGroupResponseV1 struct {
// ErrorCode holds response error code
ErrorCode int16
// GenerationID holds the generation of the group.
GenerationID int32
// GroupProtocol holds the group protocol selected by the coordinator
GroupProtocol string
// LeaderID holds the leader of the group
LeaderID string
// MemberID assigned by the group coordinator
MemberID string
Members []joinGroupResponseMemberV1
}
func (t joinGroupResponseV1) size() int32 {
return sizeofInt16(t.ErrorCode) +
sizeofInt32(t.GenerationID) +
sizeofString(t.GroupProtocol) +
sizeofString(t.LeaderID) +
sizeofString(t.MemberID) +
sizeofArray(len(t.MemberID), func(i int) int32 { return t.Members[i].size() })
}
func (t joinGroupResponseV1) writeTo(w *bufio.Writer) {
writeInt16(w, t.ErrorCode)
writeInt32(w, t.GenerationID)
writeString(w, t.GroupProtocol)
writeString(w, t.LeaderID)
writeString(w, t.MemberID)
writeArray(w, len(t.Members), func(i int) { t.Members[i].writeTo(w) })
}
func (t *joinGroupResponseV1) readFrom(r *bufio.Reader, size int) (remain int, err error) {
if remain, err = readInt16(r, size, &t.ErrorCode); err != nil {
return
}
if remain, err = readInt32(r, remain, &t.GenerationID); err != nil {
return
}
if remain, err = readString(r, remain, &t.GroupProtocol); err != nil {
return
}
if remain, err = readString(r, remain, &t.LeaderID); err != nil {
return
}
if remain, err = readString(r, remain, &t.MemberID); err != nil {
return
}
fn := func(r *bufio.Reader, size int) (fnRemain int, fnErr error) {
var item joinGroupResponseMemberV1
if fnRemain, fnErr = (&item).readFrom(r, size); fnErr != nil {
return
}
t.Members = append(t.Members, item)
return
}
if remain, err = readArrayWith(r, remain, fn); err != nil {
return
}
return
}
|
