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package kafka
import (
"bufio"
"context"
"net"
"github.com/segmentio/kafka-go/protocol/listgroups"
)
// ListGroupsRequest is a request to the ListGroups API.
type ListGroupsRequest struct {
// Addr is the address of the kafka broker to send the request to.
Addr net.Addr
}
// ListGroupsResponse is a response from the ListGroups API.
type ListGroupsResponse struct {
// Error is set to a non-nil value if a top-level error occurred while fetching
// groups.
Error error
// Groups contains the list of groups.
Groups []ListGroupsResponseGroup
}
// ListGroupsResponseGroup contains the response details for a single group.
type ListGroupsResponseGroup struct {
// GroupID is the ID of the group.
GroupID string
// Coordinator is the ID of the coordinator broker for the group.
Coordinator int
// The group protocol type (eg "consumer", "connect")
ProtocolType string
}
func (c *Client) ListGroups(
ctx context.Context,
req *ListGroupsRequest,
) (*ListGroupsResponse, error) {
protoResp, err := c.roundTrip(ctx, req.Addr, &listgroups.Request{})
if err != nil {
return nil, err
}
apiResp := protoResp.(*listgroups.Response)
resp := &ListGroupsResponse{
Error: makeError(apiResp.ErrorCode, ""),
}
for _, apiGroupInfo := range apiResp.Groups {
resp.Groups = append(resp.Groups, ListGroupsResponseGroup{
GroupID: apiGroupInfo.GroupID,
Coordinator: int(apiGroupInfo.BrokerID),
ProtocolType: apiGroupInfo.ProtocolType,
})
}
return resp, nil
}
// TODO: Remove everything below and use protocol-based version above everywhere.
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); fnErr != nil {
return
}
t.Groups = append(t.Groups, item)
return
}
if remain, err = readArrayWith(r, remain, fn); err != nil {
return
}
return
}
|
