add public api

Author: petedannemann

alterclientquotas.go

@@ -0,0 +1,118 @@
+package kafka
+
+import (
+	"context"
+	"fmt"
+	"net"
+	"time"
+
+	"github.com/segmentio/kafka-go/protocol/alterclientquotas"
+)
+
+// AlterClientQuotasRequest represents a request sent to a kafka broker to add
+// alter client quotas.
+type AlterClientQuotasRequest struct {
+	// Address of the kafka broker to send the request to.
+	Addr net.Addr
+
+	// List of client quotas entries to alter.
+	Entries []AlterClientQuotaEntry
+
+	// Whether the alteration should be validated, but not performed.
+	ValidateOnly bool
+}
+
+type AlterClientQuotaEntry struct {
+	Entities []AlterClientQuotaEntity
+	Ops      []AlterClientQuotaOps
+}
+
+type AlterClientQuotaEntity struct {
+	EntityType string
+	EntityName string
+}
+
+type AlterClientQuotaOps struct {
+	Key    string
+	Value  float64
+	Remove bool
+}
+
+type AlterClientQuotaResponseQuotas struct {
+	ErrorCode    int16
+	ErrorMessage string
+	Entities     []AlterClientQuotaEntity
+}
+
+// AlterClientQuotasResponse represents a response from a kafka broker to an alter client
+// quotas request.
+type AlterClientQuotasResponse struct {
+	// The amount of time that the broker throttled the request.
+	Throttle time.Duration
+
+	// List of altered client quotas responses.
+	Entries []AlterClientQuotaResponseQuotas
+}
+
+// AlterClientQuotas sends client quotas alteration request to a kafka broker and returns
+// the response.
+func (c *Client) AlterClientQuotas(ctx context.Context, req *AlterClientQuotasRequest) (*AlterClientQuotasResponse, error) {
+	entries := make([]alterclientquotas.Entry, len(req.Entries))
+
+	for entryIdx, entry := range req.Entries {
+		entities := make([]alterclientquotas.Entity, len(entry.Entities))
+		for entityIdx, entity := range entry.Entities {
+			entities[entityIdx] = alterclientquotas.Entity{
+				EntityType: entity.EntityType,
+				EntityName: entity.EntityName,
+			}
+		}
+
+		ops := make([]alterclientquotas.Ops, len(entry.Ops))
+		for opsIdx, op := range entry.Ops {
+			ops[opsIdx] = alterclientquotas.Ops{
+				Key:    op.Key,
+				Value:  op.Value,
+				Remove: op.Remove,
+			}
+		}
+
+		entries[entryIdx] = alterclientquotas.Entry{
+			Entities: entities,
+			Ops:      ops,
+		}
+	}
+
+	m, err := c.roundTrip(ctx, req.Addr, &alterclientquotas.Request{
+		Entries:      entries,
+		ValidateOnly: req.ValidateOnly,
+	})
+	if err != nil {
+		return nil, fmt.Errorf("kafka.(*Client).AlterClientQuotas: %w", err)
+	}
+
+	res := m.(*alterclientquotas.Response)
+	responseEntries := make([]AlterClientQuotaResponseQuotas, len(res.Results))
+
+	for responseEntryIdx, responseEntry := range res.Results {
+		responseEntities := make([]AlterClientQuotaEntity, len(responseEntry.Entities))
+		for responseEntityIdx, responseEntity := range responseEntry.Entities {
+			responseEntities[responseEntityIdx] = AlterClientQuotaEntity{
+				EntityType: responseEntity.EntityType,
+				EntityName: responseEntity.EntityName,
+			}
+		}
+
+		responseEntries[responseEntryIdx] = AlterClientQuotaResponseQuotas{
+			ErrorCode:    responseEntry.ErrorCode,
+			ErrorMessage: responseEntry.ErrorMessage,
+			Entities:     responseEntities,
+		}
+	}
+	ret := &AlterClientQuotasResponse{
+		Throttle: makeDuration(res.ThrottleTimeMs),
+		Entries:  responseEntries,
+	}
+
+	return ret, nil
+}

alterclientquotas_test.go

@@ -0,0 +1,49 @@
+package kafka
+
+import (
+	"context"
+	"testing"
+
+	ktesting "github.com/segmentio/kafka-go/testing"
+)
+
+func TestClientAlterClientQuotas(t *testing.T) {
+	// Added in Version 2.6.0 https://issues.apache.org/jira/browse/KAFKA-7740
+	if !ktesting.KafkaIsAtLeast("2.6.0") {
+		return
+	}
+
+	const (
+		entityType = "client-id"
+		entityName = "my-client-id"
+		key        = "producer_byte_rate"
+		value      = 500000.0
+	)
+
+	client, shutdown := newLocalClient()
+	defer shutdown()
+
+	resp, err := client.AlterClientQuotas(context.Background(), &AlterClientQuotasRequest{
+		Entries: []AlterClientQuotaEntry{
+			AlterClientQuotaEntry{
+				Entities: []AlterClientQuotaEntity{
+					AlterClientQuotaEntity{
+						EntityType: entityType,
+						EntityName: entityName,
+					},
+				},
+				Ops: []AlterClientQuotaOps{
+					AlterClientQuotaOps{
+						Key:    key,
+						Value:  value,
+						Remove: false,
+					},
+				},
+			},
+		},
+	})
+
+	if err != nil {
+		t.Fatal(err)
+	}
+}