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adminapi.go
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package kafka
/**
* Copyright 2018 Confluent Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import (
"context"
"fmt"
"strings"
"time"
"unsafe"
)
/*
#include "select_rdkafka.h"
#include <stdlib.h>
static const rd_kafka_topic_result_t *
topic_result_by_idx (const rd_kafka_topic_result_t **topics, size_t cnt, size_t idx) {
if (idx >= cnt)
return NULL;
return topics[idx];
}
static const rd_kafka_ConfigResource_t *
ConfigResource_by_idx (const rd_kafka_ConfigResource_t **res, size_t cnt, size_t idx) {
if (idx >= cnt)
return NULL;
return res[idx];
}
static const rd_kafka_ConfigEntry_t *
ConfigEntry_by_idx (const rd_kafka_ConfigEntry_t **entries, size_t cnt, size_t idx) {
if (idx >= cnt)
return NULL;
return entries[idx];
}
static const rd_kafka_acl_result_t *
acl_result_by_idx (const rd_kafka_acl_result_t **acl_results, size_t cnt, size_t idx) {
if (idx >= cnt)
return NULL;
return acl_results[idx];
}
static const rd_kafka_DeleteAcls_result_response_t *
DeleteAcls_result_response_by_idx (const rd_kafka_DeleteAcls_result_response_t **delete_acls_result_responses, size_t cnt, size_t idx) {
if (idx >= cnt)
return NULL;
return delete_acls_result_responses[idx];
}
static const rd_kafka_AclBinding_t *
AclBinding_by_idx (const rd_kafka_AclBinding_t **acl_bindings, size_t cnt, size_t idx) {
if (idx >= cnt)
return NULL;
return acl_bindings[idx];
}
*/
import "C"
// AdminClient is derived from an existing Producer or Consumer
type AdminClient struct {
handle *handle
isDerived bool // Derived from existing client handle
}
func durationToMilliseconds(t time.Duration) int {
if t > 0 {
return (int)(t.Seconds() * 1000.0)
}
return (int)(t)
}
// TopicResult provides per-topic operation result (error) information.
type TopicResult struct {
// Topic name
Topic string
// Error, if any, of result. Check with `Error.Code() != ErrNoError`.
Error Error
}
// String returns a human-readable representation of a TopicResult.
func (t TopicResult) String() string {
if t.Error.code == 0 {
return t.Topic
}
return fmt.Sprintf("%s (%s)", t.Topic, t.Error.str)
}
// TopicSpecification holds parameters for creating a new topic.
// TopicSpecification is analogous to NewTopic in the Java Topic Admin API.
type TopicSpecification struct {
// Topic name to create.
Topic string
// Number of partitions in topic.
NumPartitions int
// Default replication factor for the topic's partitions, or zero
// if an explicit ReplicaAssignment is set.
ReplicationFactor int
// (Optional) Explicit replica assignment. The outer array is
// indexed by the partition number, while the inner per-partition array
// contains the replica broker ids. The first broker in each
// broker id list will be the preferred replica.
ReplicaAssignment [][]int32
// Topic configuration.
Config map[string]string
}
// PartitionsSpecification holds parameters for creating additional partitions for a topic.
// PartitionsSpecification is analogous to NewPartitions in the Java Topic Admin API.
type PartitionsSpecification struct {
// Topic to create more partitions for.
Topic string
// New partition count for topic, must be higher than current partition count.
IncreaseTo int
// (Optional) Explicit replica assignment. The outer array is
// indexed by the new partition index (i.e., 0 for the first added
// partition), while the inner per-partition array
// contains the replica broker ids. The first broker in each
// broker id list will be the preferred replica.
ReplicaAssignment [][]int32
}
// ResourceType represents an Apache Kafka resource type
type ResourceType int
const (
// ResourceUnknown - Unknown
ResourceUnknown = ResourceType(C.RD_KAFKA_RESOURCE_UNKNOWN)
// ResourceAny - match any resource type (DescribeConfigs)
ResourceAny = ResourceType(C.RD_KAFKA_RESOURCE_ANY)
// ResourceTopic - Topic
ResourceTopic = ResourceType(C.RD_KAFKA_RESOURCE_TOPIC)
// ResourceGroup - Group
ResourceGroup = ResourceType(C.RD_KAFKA_RESOURCE_GROUP)
// ResourceBroker - Broker
ResourceBroker = ResourceType(C.RD_KAFKA_RESOURCE_BROKER)
)
// String returns the human-readable representation of a ResourceType
func (t ResourceType) String() string {
return C.GoString(C.rd_kafka_ResourceType_name(C.rd_kafka_ResourceType_t(t)))
}
// ResourceTypeFromString translates a resource type name/string to
// a ResourceType value.
func ResourceTypeFromString(typeString string) (ResourceType, error) {
switch strings.ToUpper(typeString) {
case "ANY":
return ResourceAny, nil
case "TOPIC":
return ResourceTopic, nil
case "GROUP":
return ResourceGroup, nil
case "BROKER":
return ResourceBroker, nil
default:
return ResourceUnknown, NewError(ErrInvalidArg, "Unknown resource type", false)
}
}
// ConfigSource represents an Apache Kafka config source
type ConfigSource int
const (
// ConfigSourceUnknown is the default value
ConfigSourceUnknown = ConfigSource(C.RD_KAFKA_CONFIG_SOURCE_UNKNOWN_CONFIG)
// ConfigSourceDynamicTopic is dynamic topic config that is configured for a specific topic
ConfigSourceDynamicTopic = ConfigSource(C.RD_KAFKA_CONFIG_SOURCE_DYNAMIC_TOPIC_CONFIG)
// ConfigSourceDynamicBroker is dynamic broker config that is configured for a specific broker
ConfigSourceDynamicBroker = ConfigSource(C.RD_KAFKA_CONFIG_SOURCE_DYNAMIC_BROKER_CONFIG)
// ConfigSourceDynamicDefaultBroker is dynamic broker config that is configured as default for all brokers in the cluster
ConfigSourceDynamicDefaultBroker = ConfigSource(C.RD_KAFKA_CONFIG_SOURCE_DYNAMIC_DEFAULT_BROKER_CONFIG)
// ConfigSourceStaticBroker is static broker config provided as broker properties at startup (e.g. from server.properties file)
ConfigSourceStaticBroker = ConfigSource(C.RD_KAFKA_CONFIG_SOURCE_STATIC_BROKER_CONFIG)
// ConfigSourceDefault is built-in default configuration for configs that have a default value
ConfigSourceDefault = ConfigSource(C.RD_KAFKA_CONFIG_SOURCE_DEFAULT_CONFIG)
)
// String returns the human-readable representation of a ConfigSource type
func (t ConfigSource) String() string {
return C.GoString(C.rd_kafka_ConfigSource_name(C.rd_kafka_ConfigSource_t(t)))
}
// ConfigResource holds parameters for altering an Apache Kafka configuration resource
type ConfigResource struct {
// Type of resource to set.
Type ResourceType
// Name of resource to set.
Name string
// Config entries to set.
// Configuration updates are atomic, any configuration property not provided
// here will be reverted (by the broker) to its default value.
// Use DescribeConfigs to retrieve the list of current configuration entry values.
Config []ConfigEntry
}
// String returns a human-readable representation of a ConfigResource
func (c ConfigResource) String() string {
return fmt.Sprintf("Resource(%s, %s)", c.Type, c.Name)
}
// AlterOperation specifies the operation to perform on the ConfigEntry.
// Currently only AlterOperationSet.
type AlterOperation int
const (
// AlterOperationSet sets/overwrites the configuration setting.
AlterOperationSet = iota
)
// String returns the human-readable representation of an AlterOperation
func (o AlterOperation) String() string {
switch o {
case AlterOperationSet:
return "Set"
default:
return fmt.Sprintf("Unknown%d?", int(o))
}
}
// ConfigEntry holds parameters for altering a resource's configuration.
type ConfigEntry struct {
// Name of configuration entry, e.g., topic configuration property name.
Name string
// Value of configuration entry.
Value string
// Operation to perform on the entry.
Operation AlterOperation
}
// StringMapToConfigEntries creates a new map of ConfigEntry objects from the
// provided string map. The AlterOperation is set on each created entry.
func StringMapToConfigEntries(stringMap map[string]string, operation AlterOperation) []ConfigEntry {
var ceList []ConfigEntry
for k, v := range stringMap {
ceList = append(ceList, ConfigEntry{Name: k, Value: v, Operation: operation})
}
return ceList
}
// String returns a human-readable representation of a ConfigEntry.
func (c ConfigEntry) String() string {
return fmt.Sprintf("%v %s=\"%s\"", c.Operation, c.Name, c.Value)
}
// ConfigEntryResult contains the result of a single configuration entry from a
// DescribeConfigs request.
type ConfigEntryResult struct {
// Name of configuration entry, e.g., topic configuration property name.
Name string
// Value of configuration entry.
Value string
// Source indicates the configuration source.
Source ConfigSource
// IsReadOnly indicates whether the configuration entry can be altered.
IsReadOnly bool
// IsSensitive indicates whether the configuration entry contains sensitive information, in which case the value will be unset.
IsSensitive bool
// IsSynonym indicates whether the configuration entry is a synonym for another configuration property.
IsSynonym bool
// Synonyms contains a map of configuration entries that are synonyms to this configuration entry.
Synonyms map[string]ConfigEntryResult
}
// String returns a human-readable representation of a ConfigEntryResult.
func (c ConfigEntryResult) String() string {
return fmt.Sprintf("%s=\"%s\"", c.Name, c.Value)
}
// setFromC sets up a ConfigEntryResult from a C ConfigEntry
func configEntryResultFromC(cEntry *C.rd_kafka_ConfigEntry_t) (entry ConfigEntryResult) {
entry.Name = C.GoString(C.rd_kafka_ConfigEntry_name(cEntry))
cValue := C.rd_kafka_ConfigEntry_value(cEntry)
if cValue != nil {
entry.Value = C.GoString(cValue)
}
entry.Source = ConfigSource(C.rd_kafka_ConfigEntry_source(cEntry))
entry.IsReadOnly = cint2bool(C.rd_kafka_ConfigEntry_is_read_only(cEntry))
entry.IsSensitive = cint2bool(C.rd_kafka_ConfigEntry_is_sensitive(cEntry))
entry.IsSynonym = cint2bool(C.rd_kafka_ConfigEntry_is_synonym(cEntry))
var cSynCnt C.size_t
cSyns := C.rd_kafka_ConfigEntry_synonyms(cEntry, &cSynCnt)
if cSynCnt > 0 {
entry.Synonyms = make(map[string]ConfigEntryResult)
}
for si := 0; si < int(cSynCnt); si++ {
cSyn := C.ConfigEntry_by_idx(cSyns, cSynCnt, C.size_t(si))
Syn := configEntryResultFromC(cSyn)
entry.Synonyms[Syn.Name] = Syn
}
return entry
}
// ConfigResourceResult provides the result for a resource from a AlterConfigs or
// DescribeConfigs request.
type ConfigResourceResult struct {
// Type of returned result resource.
Type ResourceType
// Name of returned result resource.
Name string
// Error, if any, of returned result resource.
Error Error
// Config entries, if any, of returned result resource.
Config map[string]ConfigEntryResult
}
// String returns a human-readable representation of a ConfigResourceResult.
func (c ConfigResourceResult) String() string {
if c.Error.Code() != 0 {
return fmt.Sprintf("ResourceResult(%s, %s, \"%v\")", c.Type, c.Name, c.Error)
}
return fmt.Sprintf("ResourceResult(%s, %s, %d config(s))", c.Type, c.Name, len(c.Config))
}
// ResourcePatternType enumerates the different types of Kafka resource patterns.
type ResourcePatternType int
const (
// ResourcePatternTypeUnknown is a resource pattern type not known or not set.
ResourcePatternTypeUnknown = ResourcePatternType(C.RD_KAFKA_RESOURCE_PATTERN_UNKNOWN)
// ResourcePatternTypeAny matches any resource, used for lookups.
ResourcePatternTypeAny = ResourcePatternType(C.RD_KAFKA_RESOURCE_PATTERN_ANY)
// ResourcePatternTypeMatch will perform pattern matching
ResourcePatternTypeMatch = ResourcePatternType(C.RD_KAFKA_RESOURCE_PATTERN_MATCH)
// ResourcePatternTypeLiteral matches a literal resource name
ResourcePatternTypeLiteral = ResourcePatternType(C.RD_KAFKA_RESOURCE_PATTERN_LITERAL)
// ResourcePatternTypePrefixed matches a prefixed resource name
ResourcePatternTypePrefixed = ResourcePatternType(C.RD_KAFKA_RESOURCE_PATTERN_PREFIXED)
)
// String returns the human-readable representation of a ResourcePatternType
func (t ResourcePatternType) String() string {
return C.GoString(C.rd_kafka_ResourcePatternType_name(C.rd_kafka_ResourcePatternType_t(t)))
}
// ResourcePatternTypeFromString translates a resource pattern type name to
// a ResourcePatternType value.
func ResourcePatternTypeFromString(patternTypeString string) (ResourcePatternType, error) {
switch strings.ToUpper(patternTypeString) {
case "ANY":
return ResourcePatternTypeAny, nil
case "MATCH":
return ResourcePatternTypeMatch, nil
case "LITERAL":
return ResourcePatternTypeLiteral, nil
case "PREFIXED":
return ResourcePatternTypePrefixed, nil
default:
return ResourcePatternTypeUnknown, NewError(ErrInvalidArg, "Unknown resource pattern type", false)
}
}
// ACLOperation enumerates the different types of ACL operation.
type ACLOperation int
const (
// ACLOperationUnknown represents an unknown or unset operation
ACLOperationUnknown = ACLOperation(C.RD_KAFKA_ACL_OPERATION_UNKNOWN)
// ACLOperationAny in a filter, matches any ACLOperation
ACLOperationAny = ACLOperation(C.RD_KAFKA_ACL_OPERATION_ANY)
// ACLOperationAll represents all the operations
ACLOperationAll = ACLOperation(C.RD_KAFKA_ACL_OPERATION_ALL)
// ACLOperationRead a read operation
ACLOperationRead = ACLOperation(C.RD_KAFKA_ACL_OPERATION_READ)
// ACLOperationWrite represents a write operation
ACLOperationWrite = ACLOperation(C.RD_KAFKA_ACL_OPERATION_WRITE)
// ACLOperationCreate represents a create operation
ACLOperationCreate = ACLOperation(C.RD_KAFKA_ACL_OPERATION_CREATE)
// ACLOperationDelete represents a delete operation
ACLOperationDelete = ACLOperation(C.RD_KAFKA_ACL_OPERATION_DELETE)
// ACLOperationAlter represents an alter operation
ACLOperationAlter = ACLOperation(C.RD_KAFKA_ACL_OPERATION_ALTER)
// ACLOperationDescribe represents a describe operation
ACLOperationDescribe = ACLOperation(C.RD_KAFKA_ACL_OPERATION_DESCRIBE)
// ACLOperationClusterAction represents a cluster action operation
ACLOperationClusterAction = ACLOperation(C.RD_KAFKA_ACL_OPERATION_CLUSTER_ACTION)
// ACLOperationDescribeConfigs represents a describe configs operation
ACLOperationDescribeConfigs = ACLOperation(C.RD_KAFKA_ACL_OPERATION_DESCRIBE_CONFIGS)
// ACLOperationAlterConfigs represents an alter configs operation
ACLOperationAlterConfigs = ACLOperation(C.RD_KAFKA_ACL_OPERATION_ALTER_CONFIGS)
// ACLOperationIdempotentWrite represents an idempotent write operation
ACLOperationIdempotentWrite = ACLOperation(C.RD_KAFKA_ACL_OPERATION_IDEMPOTENT_WRITE)
)
// String returns the human-readable representation of an ACLOperation
func (o ACLOperation) String() string {
return C.GoString(C.rd_kafka_AclOperation_name(C.rd_kafka_AclOperation_t(o)))
}
// ACLOperationFromString translates a ACL operation name to
// a ACLOperation value.
func ACLOperationFromString(aclOperationString string) (ACLOperation, error) {
switch strings.ToUpper(aclOperationString) {
case "ANY":
return ACLOperationAny, nil
case "ALL":
return ACLOperationAll, nil
case "READ":
return ACLOperationRead, nil
case "WRITE":
return ACLOperationWrite, nil
case "CREATE":
return ACLOperationCreate, nil
case "DELETE":
return ACLOperationDelete, nil
case "ALTER":
return ACLOperationAlter, nil
case "DESCRIBE":
return ACLOperationDescribe, nil
case "CLUSTER_ACTION":
return ACLOperationClusterAction, nil
case "DESCRIBE_CONFIGS":
return ACLOperationDescribeConfigs, nil
case "ALTER_CONFIGS":
return ACLOperationAlterConfigs, nil
case "IDEMPOTENT_WRITE":
return ACLOperationIdempotentWrite, nil
default:
return ACLOperationUnknown, NewError(ErrInvalidArg, "Unknown ACL operation", false)
}
}
// ACLPermissionType enumerates the different types of ACL permission types.
type ACLPermissionType int
const (
// ACLPermissionTypeUnknown represents an unknown ACLPermissionType
ACLPermissionTypeUnknown = ACLPermissionType(C.RD_KAFKA_ACL_PERMISSION_TYPE_UNKNOWN)
// ACLPermissionTypeAny in a filter, matches any ACLPermissionType
ACLPermissionTypeAny = ACLPermissionType(C.RD_KAFKA_ACL_PERMISSION_TYPE_ANY)
// ACLPermissionTypeDeny disallows access
ACLPermissionTypeDeny = ACLPermissionType(C.RD_KAFKA_ACL_PERMISSION_TYPE_DENY)
// ACLPermissionTypeAllow grants access
ACLPermissionTypeAllow = ACLPermissionType(C.RD_KAFKA_ACL_PERMISSION_TYPE_ALLOW)
)
// String returns the human-readable representation of an ACLPermissionType
func (o ACLPermissionType) String() string {
return C.GoString(C.rd_kafka_AclPermissionType_name(C.rd_kafka_AclPermissionType_t(o)))
}
// ACLPermissionTypeFromString translates a ACL permission type name to
// a ACLPermissionType value.
func ACLPermissionTypeFromString(aclPermissionTypeString string) (ACLPermissionType, error) {
switch strings.ToUpper(aclPermissionTypeString) {
case "ANY":
return ACLPermissionTypeAny, nil
case "DENY":
return ACLPermissionTypeDeny, nil
case "ALLOW":
return ACLPermissionTypeAllow, nil
default:
return ACLPermissionTypeUnknown, NewError(ErrInvalidArg, "Unknown ACL permission type", false)
}
}
// ACLBinding specifies the operation and permission type for a specific principal
// over one or more resources of the same type. Used by `AdminClient.CreateACLs`,
// returned by `AdminClient.DescribeACLs` and `AdminClient.DeleteACLs`.
type ACLBinding struct {
Type ResourceType // The resource type.
// The resource name, which depends on the resource type.
// For ResourceBroker the resource name is the broker id.
Name string
ResourcePatternType ResourcePatternType // The resource pattern, relative to the name.
Principal string // The principal this ACLBinding refers to.
Host string // The host that the call is allowed to come from.
Operation ACLOperation // The operation/s specified by this binding.
PermissionType ACLPermissionType // The permission type for the specified operation.
}
// ACLBindingFilter specifies a filter used to return a list of ACL bindings matching some or all of its attributes.
// Used by `AdminClient.DescribeACLs` and `AdminClient.DeleteACLs`.
type ACLBindingFilter = ACLBinding
// ACLBindings is a slice of ACLBinding that also implements
// the sort interface
type ACLBindings []ACLBinding
// ACLBindingFilters is a slice of ACLBindingFilter that also implements
// the sort interface
type ACLBindingFilters []ACLBindingFilter
func (a ACLBindings) Len() int {
return len(a)
}
func (a ACLBindings) Less(i, j int) bool {
if a[i].Type != a[j].Type {
return a[i].Type < a[j].Type
}
if a[i].Name != a[j].Name {
return a[i].Name < a[j].Name
}
if a[i].ResourcePatternType != a[j].ResourcePatternType {
return a[i].ResourcePatternType < a[j].ResourcePatternType
}
if a[i].Principal != a[j].Principal {
return a[i].Principal < a[j].Principal
}
if a[i].Host != a[j].Host {
return a[i].Host < a[j].Host
}
if a[i].Operation != a[j].Operation {
return a[i].Operation < a[j].Operation
}
if a[i].PermissionType != a[j].PermissionType {
return a[i].PermissionType < a[j].PermissionType
}
return true
}
func (a ACLBindings) Swap(i, j int) {
a[i], a[j] = a[j], a[i]
}
// CreateACLResult provides create ACL error information.
type CreateACLResult struct {
// Error, if any, of result. Check with `Error.Code() != ErrNoError`.
Error Error
}
// DescribeACLsResult provides describe ACLs result or error information.
type DescribeACLsResult struct {
// Slice of ACL bindings matching the provided filter
ACLBindings ACLBindings
// Error, if any, of result. Check with `Error.Code() != ErrNoError`.
Error Error
}
// DeleteACLsResult provides delete ACLs result or error information.
type DeleteACLsResult = DescribeACLsResult
// waitResult waits for a result event on cQueue or the ctx to be cancelled, whichever happens
// first.
// The returned result event is checked for errors its error is returned if set.
func (a *AdminClient) waitResult(ctx context.Context, cQueue *C.rd_kafka_queue_t, cEventType C.rd_kafka_event_type_t) (rkev *C.rd_kafka_event_t, err error) {
resultChan := make(chan *C.rd_kafka_event_t)
closeChan := make(chan bool) // never written to, just closed
go func() {
for {
select {
case _, ok := <-closeChan:
if !ok {
// Context cancelled/timed out
close(resultChan)
return
}
default:
// Wait for result event for at most 50ms
// to avoid blocking for too long if
// context is cancelled.
rkev := C.rd_kafka_queue_poll(cQueue, 50)
if rkev != nil {
resultChan <- rkev
close(resultChan)
return
}
}
}
}()
select {
case rkev = <-resultChan:
// Result type check
if cEventType != C.rd_kafka_event_type(rkev) {
err = newErrorFromString(ErrInvalidType,
fmt.Sprintf("Expected %d result event, not %d", (int)(cEventType), (int)(C.rd_kafka_event_type(rkev))))
C.rd_kafka_event_destroy(rkev)
return nil, err
}
// Generic error handling
cErr := C.rd_kafka_event_error(rkev)
if cErr != 0 {
err = newErrorFromCString(cErr, C.rd_kafka_event_error_string(rkev))
C.rd_kafka_event_destroy(rkev)
return nil, err
}
close(closeChan)
return rkev, nil
case <-ctx.Done():
// signal close to go-routine
close(closeChan)
// wait for close from go-routine to make sure it is done
// using cQueue before we return.
rkev, ok := <-resultChan
if ok {
// throw away result since context was cancelled
C.rd_kafka_event_destroy(rkev)
}
return nil, ctx.Err()
}
}
// cToTopicResults converts a C topic_result_t array to Go TopicResult list.
func (a *AdminClient) cToTopicResults(cTopicRes **C.rd_kafka_topic_result_t, cCnt C.size_t) (result []TopicResult, err error) {
result = make([]TopicResult, int(cCnt))
for i := 0; i < int(cCnt); i++ {
cTopic := C.topic_result_by_idx(cTopicRes, cCnt, C.size_t(i))
result[i].Topic = C.GoString(C.rd_kafka_topic_result_name(cTopic))
result[i].Error = newErrorFromCString(
C.rd_kafka_topic_result_error(cTopic),
C.rd_kafka_topic_result_error_string(cTopic))
}
return result, nil
}
// cConfigResourceToResult converts a C ConfigResource result array to Go ConfigResourceResult
func (a *AdminClient) cConfigResourceToResult(cRes **C.rd_kafka_ConfigResource_t, cCnt C.size_t) (result []ConfigResourceResult, err error) {
result = make([]ConfigResourceResult, int(cCnt))
for i := 0; i < int(cCnt); i++ {
cRes := C.ConfigResource_by_idx(cRes, cCnt, C.size_t(i))
result[i].Type = ResourceType(C.rd_kafka_ConfigResource_type(cRes))
result[i].Name = C.GoString(C.rd_kafka_ConfigResource_name(cRes))
result[i].Error = newErrorFromCString(
C.rd_kafka_ConfigResource_error(cRes),
C.rd_kafka_ConfigResource_error_string(cRes))
var cConfigCnt C.size_t
cConfigs := C.rd_kafka_ConfigResource_configs(cRes, &cConfigCnt)
if cConfigCnt > 0 {
result[i].Config = make(map[string]ConfigEntryResult)
}
for ci := 0; ci < int(cConfigCnt); ci++ {
cEntry := C.ConfigEntry_by_idx(cConfigs, cConfigCnt, C.size_t(ci))
entry := configEntryResultFromC(cEntry)
result[i].Config[entry.Name] = entry
}
}
return result, nil
}
// ClusterID returns the cluster ID as reported in broker metadata.
//
// Note on cancellation: Although the underlying C function respects the
// timeout, it currently cannot be manually cancelled. That means manually
// cancelling the context will block until the C function call returns.
//
// Requires broker version >= 0.10.0.
func (a *AdminClient) ClusterID(ctx context.Context) (clusterID string, err error) {
responseChan := make(chan *C.char, 1)
go func() {
responseChan <- C.rd_kafka_clusterid(a.handle.rk, cTimeoutFromContext(ctx))
}()
select {
case <-ctx.Done():
if cClusterID := <-responseChan; cClusterID != nil {
C.rd_kafka_mem_free(a.handle.rk, unsafe.Pointer(cClusterID))
}
return "", ctx.Err()
case cClusterID := <-responseChan:
if cClusterID == nil { // C timeout
<-ctx.Done()
return "", ctx.Err()
}
defer C.rd_kafka_mem_free(a.handle.rk, unsafe.Pointer(cClusterID))
return C.GoString(cClusterID), nil
}
}
// ControllerID returns the broker ID of the current controller as reported in
// broker metadata.
//
// Note on cancellation: Although the underlying C function respects the
// timeout, it currently cannot be manually cancelled. That means manually
// cancelling the context will block until the C function call returns.
//
// Requires broker version >= 0.10.0.
func (a *AdminClient) ControllerID(ctx context.Context) (controllerID int32, err error) {
responseChan := make(chan int32, 1)
go func() {
responseChan <- int32(C.rd_kafka_controllerid(a.handle.rk, cTimeoutFromContext(ctx)))
}()
select {
case <-ctx.Done():
<-responseChan
return 0, ctx.Err()
case controllerID := <-responseChan:
if controllerID < 0 { // C timeout
<-ctx.Done()
return 0, ctx.Err()
}
return controllerID, nil
}
}
// CreateTopics creates topics in cluster.
//
// The list of TopicSpecification objects define the per-topic partition count, replicas, etc.
//
// Topic creation is non-atomic and may succeed for some topics but fail for others,
// make sure to check the result for topic-specific errors.
//
// Note: TopicSpecification is analogous to NewTopic in the Java Topic Admin API.
func (a *AdminClient) CreateTopics(ctx context.Context, topics []TopicSpecification, options ...CreateTopicsAdminOption) (result []TopicResult, err error) {
cTopics := make([]*C.rd_kafka_NewTopic_t, len(topics))
cErrstrSize := C.size_t(512)
cErrstr := (*C.char)(C.malloc(cErrstrSize))
defer C.free(unsafe.Pointer(cErrstr))
// Convert Go TopicSpecifications to C TopicSpecifications
for i, topic := range topics {
var cReplicationFactor C.int
if topic.ReplicationFactor == 0 {
cReplicationFactor = -1
} else {
cReplicationFactor = C.int(topic.ReplicationFactor)
}
if topic.ReplicaAssignment != nil {
if cReplicationFactor != -1 {
return nil, newErrorFromString(ErrInvalidArg,
"TopicSpecification.ReplicationFactor and TopicSpecification.ReplicaAssignment are mutually exclusive")
}
if len(topic.ReplicaAssignment) != topic.NumPartitions {
return nil, newErrorFromString(ErrInvalidArg,
"TopicSpecification.ReplicaAssignment must contain exactly TopicSpecification.NumPartitions partitions")
}
}
cTopics[i] = C.rd_kafka_NewTopic_new(
C.CString(topic.Topic),
C.int(topic.NumPartitions),
cReplicationFactor,
cErrstr, cErrstrSize)
if cTopics[i] == nil {
return nil, newErrorFromString(ErrInvalidArg,
fmt.Sprintf("Topic %s: %s", topic.Topic, C.GoString(cErrstr)))
}
defer C.rd_kafka_NewTopic_destroy(cTopics[i])
for p, replicas := range topic.ReplicaAssignment {
cReplicas := make([]C.int32_t, len(replicas))
for ri, replica := range replicas {
cReplicas[ri] = C.int32_t(replica)
}
cErr := C.rd_kafka_NewTopic_set_replica_assignment(
cTopics[i], C.int32_t(p),
(*C.int32_t)(&cReplicas[0]), C.size_t(len(cReplicas)),
cErrstr, cErrstrSize)
if cErr != 0 {
return nil, newCErrorFromString(cErr,
fmt.Sprintf("Failed to set replica assignment for topic %s partition %d: %s", topic.Topic, p, C.GoString(cErrstr)))
}
}
for key, value := range topic.Config {
cErr := C.rd_kafka_NewTopic_set_config(
cTopics[i],
C.CString(key), C.CString(value))
if cErr != 0 {
return nil, newCErrorFromString(cErr,
fmt.Sprintf("Failed to set config %s=%s for topic %s", key, value, topic.Topic))
}
}
}
// Convert Go AdminOptions (if any) to C AdminOptions
genericOptions := make([]AdminOption, len(options))
for i := range options {
genericOptions[i] = options[i]
}
cOptions, err := adminOptionsSetup(a.handle, C.RD_KAFKA_ADMIN_OP_CREATETOPICS, genericOptions)
if err != nil {
return nil, err
}
defer C.rd_kafka_AdminOptions_destroy(cOptions)
// Create temporary queue for async operation
cQueue := C.rd_kafka_queue_new(a.handle.rk)
defer C.rd_kafka_queue_destroy(cQueue)
// Asynchronous call
C.rd_kafka_CreateTopics(
a.handle.rk,
(**C.rd_kafka_NewTopic_t)(&cTopics[0]),
C.size_t(len(cTopics)),
cOptions,
cQueue)
// Wait for result, error or context timeout
rkev, err := a.waitResult(ctx, cQueue, C.RD_KAFKA_EVENT_CREATETOPICS_RESULT)
if err != nil {
return nil, err
}
defer C.rd_kafka_event_destroy(rkev)
cRes := C.rd_kafka_event_CreateTopics_result(rkev)
// Convert result from C to Go
var cCnt C.size_t
cTopicRes := C.rd_kafka_CreateTopics_result_topics(cRes, &cCnt)
return a.cToTopicResults(cTopicRes, cCnt)
}
// DeleteTopics deletes a batch of topics.
//
// This operation is not transactional and may succeed for a subset of topics while
// failing others.
// It may take several seconds after the DeleteTopics result returns success for
// all the brokers to become aware that the topics are gone. During this time,
// topic metadata and configuration may continue to return information about deleted topics.
//
// Requires broker version >= 0.10.1.0
func (a *AdminClient) DeleteTopics(ctx context.Context, topics []string, options ...DeleteTopicsAdminOption) (result []TopicResult, err error) {
cTopics := make([]*C.rd_kafka_DeleteTopic_t, len(topics))
cErrstrSize := C.size_t(512)
cErrstr := (*C.char)(C.malloc(cErrstrSize))
defer C.free(unsafe.Pointer(cErrstr))
// Convert Go DeleteTopics to C DeleteTopics
for i, topic := range topics {
cTopics[i] = C.rd_kafka_DeleteTopic_new(C.CString(topic))
if cTopics[i] == nil {
return nil, newErrorFromString(ErrInvalidArg,
fmt.Sprintf("Invalid arguments for topic %s", topic))
}
defer C.rd_kafka_DeleteTopic_destroy(cTopics[i])
}
// Convert Go AdminOptions (if any) to C AdminOptions
genericOptions := make([]AdminOption, len(options))
for i := range options {
genericOptions[i] = options[i]
}
cOptions, err := adminOptionsSetup(a.handle, C.RD_KAFKA_ADMIN_OP_DELETETOPICS, genericOptions)
if err != nil {
return nil, err
}
defer C.rd_kafka_AdminOptions_destroy(cOptions)
// Create temporary queue for async operation
cQueue := C.rd_kafka_queue_new(a.handle.rk)
defer C.rd_kafka_queue_destroy(cQueue)
// Asynchronous call
C.rd_kafka_DeleteTopics(
a.handle.rk,
(**C.rd_kafka_DeleteTopic_t)(&cTopics[0]),
C.size_t(len(cTopics)),
cOptions,
cQueue)
// Wait for result, error or context timeout
rkev, err := a.waitResult(ctx, cQueue, C.RD_KAFKA_EVENT_DELETETOPICS_RESULT)
if err != nil {
return nil, err
}
defer C.rd_kafka_event_destroy(rkev)
cRes := C.rd_kafka_event_DeleteTopics_result(rkev)
// Convert result from C to Go
var cCnt C.size_t
cTopicRes := C.rd_kafka_DeleteTopics_result_topics(cRes, &cCnt)
return a.cToTopicResults(cTopicRes, cCnt)
}
// CreatePartitions creates additional partitions for topics.
func (a *AdminClient) CreatePartitions(ctx context.Context, partitions []PartitionsSpecification, options ...CreatePartitionsAdminOption) (result []TopicResult, err error) {
cParts := make([]*C.rd_kafka_NewPartitions_t, len(partitions))
cErrstrSize := C.size_t(512)
cErrstr := (*C.char)(C.malloc(cErrstrSize))
defer C.free(unsafe.Pointer(cErrstr))
// Convert Go PartitionsSpecification to C NewPartitions
for i, part := range partitions {
cParts[i] = C.rd_kafka_NewPartitions_new(C.CString(part.Topic), C.size_t(part.IncreaseTo), cErrstr, cErrstrSize)
if cParts[i] == nil {
return nil, newErrorFromString(ErrInvalidArg,
fmt.Sprintf("Topic %s: %s", part.Topic, C.GoString(cErrstr)))
}
defer C.rd_kafka_NewPartitions_destroy(cParts[i])
for pidx, replicas := range part.ReplicaAssignment {
cReplicas := make([]C.int32_t, len(replicas))
for ri, replica := range replicas {
cReplicas[ri] = C.int32_t(replica)
}
cErr := C.rd_kafka_NewPartitions_set_replica_assignment(
cParts[i], C.int32_t(pidx),
(*C.int32_t)(&cReplicas[0]), C.size_t(len(cReplicas)),
cErrstr, cErrstrSize)
if cErr != 0 {
return nil, newCErrorFromString(cErr,
fmt.Sprintf("Failed to set replica assignment for topic %s new partition index %d: %s", part.Topic, pidx, C.GoString(cErrstr)))
}
}
}
// Convert Go AdminOptions (if any) to C AdminOptions
genericOptions := make([]AdminOption, len(options))
for i := range options {
genericOptions[i] = options[i]
}
cOptions, err := adminOptionsSetup(a.handle, C.RD_KAFKA_ADMIN_OP_CREATEPARTITIONS, genericOptions)
if err != nil {
return nil, err
}
defer C.rd_kafka_AdminOptions_destroy(cOptions)
// Create temporary queue for async operation
cQueue := C.rd_kafka_queue_new(a.handle.rk)
defer C.rd_kafka_queue_destroy(cQueue)
// Asynchronous call
C.rd_kafka_CreatePartitions(
a.handle.rk,
(**C.rd_kafka_NewPartitions_t)(&cParts[0]),
C.size_t(len(cParts)),
cOptions,
cQueue)
// Wait for result, error or context timeout
rkev, err := a.waitResult(ctx, cQueue, C.RD_KAFKA_EVENT_CREATEPARTITIONS_RESULT)
if err != nil {
return nil, err
}
defer C.rd_kafka_event_destroy(rkev)
cRes := C.rd_kafka_event_CreatePartitions_result(rkev)
// Convert result from C to Go
var cCnt C.size_t
cTopicRes := C.rd_kafka_CreatePartitions_result_topics(cRes, &cCnt)
return a.cToTopicResults(cTopicRes, cCnt)
}
// AlterConfigs alters/updates cluster resource configuration.
//
// Updates are not transactional so they may succeed for a subset
// of the provided resources while others fail.
// The configuration for a particular resource is updated atomically,
// replacing values using the provided ConfigEntrys and reverting
// unspecified ConfigEntrys to their default values.
//
// Requires broker version >=0.11.0.0
//
// AlterConfigs will replace all existing configuration for
// the provided resources with the new configuration given,
// reverting all other configuration to their default values.
//
// Multiple resources and resource types may be set, but at most one
// resource of type ResourceBroker is allowed per call since these
// resource requests must be sent to the broker specified in the resource.
func (a *AdminClient) AlterConfigs(ctx context.Context, resources []ConfigResource, options ...AlterConfigsAdminOption) (result []ConfigResourceResult, err error) {
cRes := make([]*C.rd_kafka_ConfigResource_t, len(resources))
cErrstrSize := C.size_t(512)
cErrstr := (*C.char)(C.malloc(cErrstrSize))
defer C.free(unsafe.Pointer(cErrstr))
// Convert Go ConfigResources to C ConfigResources