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listgroups.go
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package kafka
import (
"bufio"
"context"
"errors"
"net"
"github.com/segmentio/kafka-go/protocol/listgroups"
)
type ListGroupsRequest struct {
// Address of the kafka broker to send the request to.
Addr net.Addr
}
type ListGroupsResponse struct {
Groups []ConsumerGroupInfo
}
type ConsumerGroupInfo struct {
GroupID string
Coordinator int32
}
func (c *Client) ListGroups(
req ListGroupsRequest,
ctx context.Context,
) (*ListGroupsResponse, error) {
protocolResp, err := c.roundTrip(ctx, req.Addr, &listgroups.Request{})
if err != nil {
return nil, err
}
apiResp, ok := protocolResp.(*listgroups.Response)
if !ok {
return nil, errors.New("Unexpected response type")
}
resp := &ListGroupsResponse{}
for _, apiGroupInfo := range apiResp.Groups {
resp.Groups = append(resp.Groups, ConsumerGroupInfo{
GroupID: apiGroupInfo.GroupID,
Coordinator: apiGroupInfo.BrokerID,
})
}
return resp, nil
}
type listGroupsRequestV1 struct {
}
func (t listGroupsRequestV1) size() int32 {
return 0
}
func (t listGroupsRequestV1) writeTo(wb *writeBuffer) {
}
type listGroupsResponseGroupV1 struct {
// GroupID holds the unique group identifier
GroupID string
ProtocolType string
}
func (t listGroupsResponseGroupV1) size() int32 {
return sizeofString(t.GroupID) + sizeofString(t.ProtocolType)
}
func (t listGroupsResponseGroupV1) writeTo(wb *writeBuffer) {
wb.writeString(t.GroupID)
wb.writeString(t.ProtocolType)
}
func (t *listGroupsResponseGroupV1) readFrom(r *bufio.Reader, size int) (remain int, err error) {
if remain, err = readString(r, size, &t.GroupID); err != nil {
return
}
if remain, err = readString(r, remain, &t.ProtocolType); err != nil {
return
}
return
}
type listGroupsResponseV1 struct {
// ThrottleTimeMS holds the duration in milliseconds for which the request
// was throttled due to quota violation (Zero if the request did not violate
// any quota)
ThrottleTimeMS int32
// ErrorCode holds response error code
ErrorCode int16
Groups []listGroupsResponseGroupV1
}
func (t listGroupsResponseV1) size() int32 {
return sizeofInt32(t.ThrottleTimeMS) +
sizeofInt16(t.ErrorCode) +
sizeofArray(len(t.Groups), func(i int) int32 { return t.Groups[i].size() })
}
func (t listGroupsResponseV1) writeTo(wb *writeBuffer) {
wb.writeInt32(t.ThrottleTimeMS)
wb.writeInt16(t.ErrorCode)
wb.writeArray(len(t.Groups), func(i int) { t.Groups[i].writeTo(wb) })
}
func (t *listGroupsResponseV1) readFrom(r *bufio.Reader, size int) (remain int, err error) {
if remain, err = readInt32(r, size, &t.ThrottleTimeMS); err != nil {
return
}
if remain, err = readInt16(r, remain, &t.ErrorCode); err != nil {
return
}
fn := func(withReader *bufio.Reader, withSize int) (fnRemain int, fnErr error) {
var item listGroupsResponseGroupV1
if fnRemain, fnErr = (&item).readFrom(withReader, withSize); err != nil {
return
}
t.Groups = append(t.Groups, item)
return
}
if remain, err = readArrayWith(r, remain, fn); err != nil {
return
}
return
}