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package sarama
type GroupProtocol struct {
// Name contains the protocol name.
Name string
// Metadata contains the protocol metadata.
Metadata []byte
}
func (p *GroupProtocol) decode(pd packetDecoder) (err error) {
p.Name, err = pd.getString()
if err != nil {
return err
}
p.Metadata, err = pd.getBytes()
return err
}
func (p *GroupProtocol) encode(pe packetEncoder) (err error) {
if err := pe.putString(p.Name); err != nil {
return err
}
if err := pe.putBytes(p.Metadata); err != nil {
return err
}
return nil
}
type JoinGroupRequest struct {
// Version defines the protocol version to use for encode and decode
Version int16
// GroupId contains the group identifier.
GroupId string
// SessionTimeout specifies that the coordinator should consider the consumer
// dead if it receives no heartbeat after this timeout in milliseconds.
SessionTimeout int32
// RebalanceTimeout contains the maximum time in milliseconds that the
// coordinator will wait for each member to rejoin when rebalancing the
// group.
RebalanceTimeout int32
// MemberId contains the member id assigned by the group coordinator.
MemberId string
// GroupInstanceId contains the unique identifier of the consumer instance
// provided by end user.
GroupInstanceId *string
// ProtocolType contains the unique name the for class of protocols
// implemented by the group we want to join.
ProtocolType string
// GroupProtocols contains the list of protocols that the member supports.
// deprecated; use OrderedGroupProtocols
GroupProtocols map[string][]byte
// OrderedGroupProtocols contains an ordered list of protocols that the member
// supports.
OrderedGroupProtocols []*GroupProtocol
}
func (r *JoinGroupRequest) encode(pe packetEncoder) error {
if err := pe.putString(r.GroupId); err != nil {
return err
}
pe.putInt32(r.SessionTimeout)
if r.Version >= 1 {
pe.putInt32(r.RebalanceTimeout)
}
if err := pe.putString(r.MemberId); err != nil {
return err
}
if r.Version >= 5 {
if err := pe.putNullableString(r.GroupInstanceId); err != nil {
return err
}
}
if err := pe.putString(r.ProtocolType); err != nil {
return err
}
if len(r.GroupProtocols) > 0 {
if len(r.OrderedGroupProtocols) > 0 {
return PacketDecodingError{"cannot specify both GroupProtocols and OrderedGroupProtocols on JoinGroupRequest"}
}
if err := pe.putArrayLength(len(r.GroupProtocols)); err != nil {
return err
}
for name, metadata := range r.GroupProtocols {
if err := pe.putString(name); err != nil {
return err
}
if err := pe.putBytes(metadata); err != nil {
return err
}
}
} else {
if err := pe.putArrayLength(len(r.OrderedGroupProtocols)); err != nil {
return err
}
for _, protocol := range r.OrderedGroupProtocols {
if err := protocol.encode(pe); err != nil {
return err
}
}
}
return nil
}
func (r *JoinGroupRequest) decode(pd packetDecoder, version int16) (err error) {
r.Version = version
if r.GroupId, err = pd.getString(); err != nil {
return
}
if r.SessionTimeout, err = pd.getInt32(); err != nil {
return
}
if version >= 1 {
if r.RebalanceTimeout, err = pd.getInt32(); err != nil {
return err
}
}
if r.MemberId, err = pd.getString(); err != nil {
return
}
if version >= 5 {
if r.GroupInstanceId, err = pd.getNullableString(); err != nil {
return
}
}
if r.ProtocolType, err = pd.getString(); err != nil {
return
}
n, err := pd.getArrayLength()
if err != nil {
return err
}
if n == 0 {
return nil
}
r.GroupProtocols = make(map[string][]byte)
for i := 0; i < n; i++ {
protocol := &GroupProtocol{}
if err := protocol.decode(pd); err != nil {
return err
}
r.GroupProtocols[protocol.Name] = protocol.Metadata
r.OrderedGroupProtocols = append(r.OrderedGroupProtocols, protocol)
}
return nil
}
func (r *JoinGroupRequest) key() int16 {
return 11
}
func (r *JoinGroupRequest) version() int16 {
return r.Version
}
func (r *JoinGroupRequest) headerVersion() int16 {
return 1
}
func (r *JoinGroupRequest) isValidVersion() bool {
return r.Version >= 0 && r.Version <= 5
}
func (r *JoinGroupRequest) requiredVersion() KafkaVersion {
switch r.Version {
case 5:
return V2_3_0_0
case 4:
return V2_2_0_0
case 3:
return V2_0_0_0
case 2:
return V0_11_0_0
case 1:
return V0_10_1_0
case 0:
return V0_10_0_0
default:
return V2_3_0_0
}
}
func (r *JoinGroupRequest) AddGroupProtocol(name string, metadata []byte) {
r.OrderedGroupProtocols = append(r.OrderedGroupProtocols, &GroupProtocol{
Name: name,
Metadata: metadata,
})
}
func (r *JoinGroupRequest) AddGroupProtocolMetadata(name string, metadata *ConsumerGroupMemberMetadata) error {
bin, err := encode(metadata, nil)
if err != nil {
return err
}
r.AddGroupProtocol(name, bin)
return nil
}
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