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kafka.go
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kafka.go
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package kafka
import (
"context"
"crypto/tls"
"crypto/x509"
"encoding/binary"
"errors"
"fmt"
"github.com/Shopify/sarama"
"github.com/team-ide/go-tool/util"
"sort"
"strconv"
"strings"
"time"
)
// Service 注册处理器在线信息等
type Service struct {
*Config
}
func (this_ *Service) init() (err error) {
return
}
func (this_ *Service) Close() {
if this_ == nil {
return
}
}
func (this_ *Service) GetServers() []string {
var servers []string
if this_.Address == "" {
return servers
}
if strings.Contains(this_.Address, ",") {
servers = strings.Split(this_.Address, ",")
} else if strings.Contains(this_.Address, ";") {
servers = strings.Split(this_.Address, ";")
} else {
servers = []string{this_.Address}
}
return servers
}
func (this_ *Service) getClient() (saramaClient sarama.Client, err error) {
config := sarama.NewConfig()
config.Consumer.Return.Errors = true
config.Consumer.Offsets.Initial = sarama.OffsetOldest
config.Consumer.MaxWaitTime = time.Second * 1
if this_.Username != "" || this_.Password != "" {
// sasl认证
config.Net.SASL.Enable = true
config.Net.SASL.User = this_.Username
config.Net.SASL.Password = this_.Password
}
if this_.CertPath != "" {
certPool := x509.NewCertPool()
var pemCerts []byte
pemCerts, err = util.ReadFile(this_.CertPath)
if err != nil {
return
}
if !certPool.AppendCertsFromPEM(pemCerts) {
err = errors.New("证书[" + this_.CertPath + "]解析失败")
return
}
TLSClientConfig := &tls.Config{
InsecureSkipVerify: true,
}
TLSClientConfig.RootCAs = certPool
config.Net.TLS.Enable = true
config.Net.TLS.Config = TLSClientConfig
}
saramaClient, err = sarama.NewClient(this_.GetServers(), config)
if err != nil {
if saramaClient != nil {
_ = saramaClient.Close()
}
return
}
return
}
type Info struct {
Brokers []*BrokerInfo `json:"brokers"`
}
type BrokerInfo struct {
Id int32 `json:"id"`
Addr string `json:"addr"`
Rack string `json:"rack"`
Connected bool `json:"connected"`
}
func (this_ *Service) Info() (res *Info, err error) {
var saramaClient sarama.Client
saramaClient, err = this_.getClient()
if err != nil {
return
}
defer closeSaramaClient(saramaClient)
brokers := saramaClient.Brokers()
res = &Info{}
for _, broker := range brokers {
brokerInfo := &BrokerInfo{}
brokerInfo.Id = broker.ID()
brokerInfo.Addr = broker.Addr()
brokerInfo.Rack = broker.Rack()
brokerInfo.Connected, _ = broker.Connected()
}
return
}
func closeSaramaClient(saramaClient sarama.Client) {
if saramaClient != nil {
_ = saramaClient.Close()
}
}
func closeClusterAdmin(clusterAdmin sarama.ClusterAdmin) {
if clusterAdmin != nil {
_ = clusterAdmin.Close()
}
}
type TopicInfo struct {
Topic string `json:"topic"`
Partitions []*TopicPartition `json:"partitions"`
}
type TopicPartition struct {
Partition int32 `json:"partition"`
Offset int64 `json:"offset"`
Replicas []int32 `json:"replicas"`
}
func (this_ *Service) GetTopics() (res []*TopicInfo, err error) {
var saramaClient sarama.Client
saramaClient, err = this_.getClient()
if err != nil {
return
}
defer closeSaramaClient(saramaClient)
topics, err := saramaClient.Topics()
if err != nil {
return
}
sort.Slice(topics, func(i, j int) bool {
return strings.ToLower(topics[i]) < strings.ToLower(topics[j]) //升序 即前面的值比后面的小 忽略大小写排序
})
for _, topic := range topics {
info := &TopicInfo{
Topic: topic,
}
ps, _ := saramaClient.Partitions(topic)
for _, p := range ps {
partition := &TopicPartition{
Partition: p,
}
info.Partitions = append(info.Partitions, partition)
}
res = append(res, info)
}
return
}
func (this_ *Service) GetTopic(topic string, time int64) (res *TopicInfo, err error) {
var saramaClient sarama.Client
saramaClient, err = this_.getClient()
if err != nil {
return
}
defer closeSaramaClient(saramaClient)
res = &TopicInfo{
Topic: topic,
}
ps, _ := saramaClient.Partitions(topic)
for _, p := range ps {
partition := &TopicPartition{
Partition: p,
}
partition.Offset, _ = saramaClient.GetOffset(topic, p, time)
partition.Replicas, _ = saramaClient.Replicas(topic, p)
res.Partitions = append(res.Partitions, partition)
}
return
}
func (this_ *Service) Pull(groupId string, topics []string, PullSize int, PullTimeout int, keyType, valueType string) (msgList []*Message, err error) {
if PullSize <= 0 {
PullSize = 10
}
if PullTimeout <= 0 {
PullTimeout = 1000
}
var saramaClient sarama.Client
saramaClient, err = this_.getClient()
if err != nil {
return
}
defer closeSaramaClient(saramaClient)
group, err := sarama.NewConsumerGroupFromClient(groupId, saramaClient)
if err != nil {
return
}
handler := &consumerGroupHandler{
size: PullSize,
}
go func() {
ctx := context.Background()
err = group.Consume(ctx, topics, handler)
if err != nil {
fmt.Println("group.Consume error:", err)
}
}()
startTime := util.GetNowMilli()
for {
time.Sleep(100 * time.Millisecond)
nowTime := util.GetNowMilli()
if handler.appended || nowTime-startTime >= int64(PullTimeout) {
break
}
}
err = group.Close()
if err != nil {
fmt.Println("group.Close error:", err)
return
}
for _, one := range handler.messages {
var msg *Message
msg, err = ConsumerMessageToMessage(keyType, valueType, one)
if err != nil {
return
}
msgList = append(msgList, msg)
}
return
}
type consumerGroupHandler struct {
messages []*sarama.ConsumerMessage
appended bool
size int
}
func (*consumerGroupHandler) Setup(_ sarama.ConsumerGroupSession) error { return nil }
func (*consumerGroupHandler) Cleanup(_ sarama.ConsumerGroupSession) error { return nil }
func (handler *consumerGroupHandler) ConsumeClaim(sess sarama.ConsumerGroupSession, claim sarama.ConsumerGroupClaim) error {
if sess == nil {
return nil
}
chanMessages := claim.Messages()
for msg := range chanMessages {
handler.messages = append(handler.messages, msg)
if len(handler.messages) >= handler.size {
break
}
}
handler.appended = true
return nil
}
func (this_ *Service) MarkOffset(groupId string, topic string, partition int32, offset int64) (err error) {
var saramaClient sarama.Client
saramaClient, err = this_.getClient()
if err != nil {
return
}
defer closeSaramaClient(saramaClient)
offsetManager, err := sarama.NewOffsetManagerFromClient(groupId, saramaClient)
if err != nil {
return
}
partitionOffsetManager, err := offsetManager.ManagePartition(topic, partition)
if err != nil {
return
}
partitionOffsetManager.MarkOffset(offset, "")
err = offsetManager.Close()
return
}
func (this_ *Service) ResetOffset(groupId string, topic string, partition int32, offset int64) (err error) {
var saramaClient sarama.Client
saramaClient, err = this_.getClient()
if err != nil {
return
}
defer closeSaramaClient(saramaClient)
offsetManager, err := sarama.NewOffsetManagerFromClient(groupId, saramaClient)
if err != nil {
return
}
partitionOffsetManager, err := offsetManager.ManagePartition(topic, partition)
if err != nil {
return
}
defer func() {
_ = offsetManager.Close()
}()
partitionOffsetManager.ResetOffset(offset, "")
return
}
type Group struct {
GroupId string `json:"groupId"`
Cluster string `json:"cluster"`
}
func (this_ *Service) ListConsumerGroups() (res []*Group, err error) {
var saramaClient sarama.Client
saramaClient, err = this_.getClient()
if err != nil {
return
}
defer closeSaramaClient(saramaClient)
manager, err := sarama.NewClusterAdminFromClient(saramaClient)
if err != nil {
return
}
defer closeClusterAdmin(manager)
data, err := manager.ListConsumerGroups()
if err != nil {
return
}
if data != nil {
for groupId, cluster := range data {
res = append(res, &Group{
GroupId: groupId,
Cluster: cluster,
})
}
}
return
}
type GroupDescription struct {
// Version defines the protocol version to use for encode and decode
Version int16 `json:"version"`
// Err contains the describe error as the KError type.
Err sarama.KError `json:"err"`
// ErrorCode contains the describe error, or 0 if there was no error.
ErrorCode int16 `json:"errorCode"`
// GroupId contains the group ID string.
GroupId string `json:"groupId"`
// State contains the group state string, or the empty string.
State string `json:"state"`
// ProtocolType contains the group protocol type, or the empty string.
ProtocolType string `json:"protocolType"`
// Protocol contains the group protocol data, or the empty string.
Protocol string `json:"protocol"`
// Members contains the group members.
Members map[string]*GroupMemberDescription `json:"members"`
// AuthorizedOperations contains a 32-bit bitfield to represent authorized
// operations for this group.
AuthorizedOperations int32 `json:"authorizedOperations"`
}
type GroupMemberDescription struct {
// Version defines the protocol version to use for encode and decode
Version int16 `json:"version"`
// MemberId contains the member ID assigned by the group coordinator.
MemberId string `json:"memberId"`
// GroupInstanceId contains the unique identifier of the consumer instance
// provided by end user.
GroupInstanceId *string `json:"groupInstanceId"`
// ClientId contains the client ID used in the member's latest join group
// request.
ClientId string `json:"clientId"`
// ClientHost contains the client host.
ClientHost string `json:"clientHost"`
// MemberMetadata contains the metadata corresponding to the current group
// protocol in use.
MemberMetadata []byte `json:"memberMetadata"`
// MemberAssignment contains the current assignment provided by the group
// leader.
MemberAssignment []byte `json:"memberAssignment"`
}
func (this_ *Service) DescribeConsumerGroups(groups []string) (res []*GroupDescription, err error) {
var saramaClient sarama.Client
saramaClient, err = this_.getClient()
if err != nil {
return
}
defer closeSaramaClient(saramaClient)
manager, err := sarama.NewClusterAdminFromClient(saramaClient)
if err != nil {
return
}
defer closeClusterAdmin(manager)
list, err := manager.DescribeConsumerGroups(groups)
if err != nil {
return
}
for _, one := range list {
d := &GroupDescription{
Version: one.Version,
GroupId: one.GroupId,
Err: one.Err,
ErrorCode: one.ErrorCode,
State: one.State,
ProtocolType: one.ProtocolType,
Protocol: one.Protocol,
AuthorizedOperations: one.AuthorizedOperations,
Members: map[string]*GroupMemberDescription{},
}
if one.Members != nil {
for key, v := range one.Members {
d.Members[key] = &GroupMemberDescription{
Version: v.Version,
MemberId: v.MemberId,
GroupInstanceId: v.GroupInstanceId,
ClientId: v.ClientId,
ClientHost: v.ClientHost,
MemberMetadata: v.MemberMetadata,
MemberAssignment: v.MemberAssignment,
}
}
}
res = append(res, d)
}
return
}
type LeaveGroupResponse struct {
Version int16 `json:"version"`
ThrottleTime int32 `json:"throttleTime"`
Err sarama.KError `json:"err"`
Members []MemberResponse `json:"members"`
}
type MemberResponse struct {
MemberId string `json:"memberId"`
GroupInstanceId *string `json:"groupInstanceId"`
Err sarama.KError `json:"err"`
}
func (this_ *Service) RemoveMemberFromConsumerGroup(groupId string, groupInstanceIds []string) (res *LeaveGroupResponse, err error) {
var saramaClient sarama.Client
saramaClient, err = this_.getClient()
if err != nil {
return
}
defer closeSaramaClient(saramaClient)
manager, err := sarama.NewClusterAdminFromClient(saramaClient)
if err != nil {
return
}
defer closeClusterAdmin(manager)
one, err := manager.RemoveMemberFromConsumerGroup(groupId, groupInstanceIds)
if err != nil {
return
}
if one != nil {
res = &LeaveGroupResponse{
Version: one.Version,
ThrottleTime: one.ThrottleTime,
Err: one.Err,
}
for _, v := range one.Members {
res.Members = append(res.Members, MemberResponse{
MemberId: v.MemberId,
GroupInstanceId: v.GroupInstanceId,
Err: v.Err,
})
}
}
return
}
func (this_ *Service) DeleteConsumerGroupOffset(group string, topic string, partition int32) (err error) {
var saramaClient sarama.Client
saramaClient, err = this_.getClient()
if err != nil {
return
}
defer closeSaramaClient(saramaClient)
manager, err := sarama.NewClusterAdminFromClient(saramaClient)
if err != nil {
return
}
defer closeClusterAdmin(manager)
err = manager.DeleteConsumerGroupOffset(group, topic, partition)
return
}
type OffsetFetchResponse struct {
Version int16 `json:"version"`
ThrottleTimeMs int32 `json:"throttleTimeMs"`
Blocks map[string]map[int32]*OffsetFetchResponseBlock `json:"blocks"`
Err sarama.KError `json:"err"`
}
type OffsetFetchResponseBlock struct {
Offset int64 `json:"offset"`
LeaderEpoch int32 `json:"leaderEpoch"`
Metadata string `json:"metadata"`
Err sarama.KError `json:"err"`
}
func (this_ *Service) ListConsumerGroupOffsets(group string, topicPartitions map[string][]int32) (res *OffsetFetchResponse, err error) {
var saramaClient sarama.Client
saramaClient, err = this_.getClient()
if err != nil {
return
}
defer closeSaramaClient(saramaClient)
manager, err := sarama.NewClusterAdminFromClient(saramaClient)
if err != nil {
return
}
defer closeClusterAdmin(manager)
one, err := manager.ListConsumerGroupOffsets(group, topicPartitions)
if one != nil {
res = &OffsetFetchResponse{
Version: one.Version,
ThrottleTimeMs: one.ThrottleTimeMs,
Err: one.Err,
Blocks: map[string]map[int32]*OffsetFetchResponseBlock{},
}
for k, v := range one.Blocks {
s := map[int32]*OffsetFetchResponseBlock{}
if v != nil {
for k_, v_ := range v {
s[k_] = &OffsetFetchResponseBlock{
Offset: v_.Offset,
LeaderEpoch: v_.LeaderEpoch,
Metadata: v_.Metadata,
Err: v_.Err,
}
}
}
res.Blocks[k] = s
}
}
return
}
func (this_ *Service) GetClient() (res sarama.Client, err error) {
res, err = this_.getClient()
if err != nil {
return
}
return
}
func (this_ *Service) CreatePartitions(topic string, count int32) (err error) {
var saramaClient sarama.Client
saramaClient, err = this_.getClient()
if err != nil {
return
}
defer closeSaramaClient(saramaClient)
admin, err := sarama.NewClusterAdminFromClient(saramaClient)
if err != nil {
return
}
defer closeClusterAdmin(admin)
err = admin.CreatePartitions(topic, count, nil, false)
return
}
func (this_ *Service) CreateTopic(topic string, numPartitions int32, replicationFactor int16) (err error) {
var saramaClient sarama.Client
saramaClient, err = this_.getClient()
if err != nil {
return
}
defer closeSaramaClient(saramaClient)
admin, err := sarama.NewClusterAdminFromClient(saramaClient)
if err != nil {
return
}
defer closeClusterAdmin(admin)
if numPartitions <= 0 {
numPartitions = 1
}
if replicationFactor <= 0 {
replicationFactor = 1
}
detail := &sarama.TopicDetail{
NumPartitions: numPartitions,
ReplicationFactor: replicationFactor,
}
err = admin.CreateTopic(topic, detail, false)
return
}
func (this_ *Service) DeleteTopic(topic string) (err error) {
var saramaClient sarama.Client
saramaClient, err = this_.getClient()
if err != nil {
return
}
defer closeSaramaClient(saramaClient)
admin, err := sarama.NewClusterAdminFromClient(saramaClient)
if err != nil {
return
}
defer closeClusterAdmin(admin)
err = admin.DeleteTopic(topic)
return
}
func (this_ *Service) DeleteConsumerGroup(groupId string) (err error) {
var saramaClient sarama.Client
saramaClient, err = this_.getClient()
if err != nil {
return
}
defer closeSaramaClient(saramaClient)
admin, err := sarama.NewClusterAdminFromClient(saramaClient)
if err != nil {
return
}
defer closeClusterAdmin(admin)
err = admin.DeleteConsumerGroup(groupId)
return
}
type TopicMetadata struct {
// Version defines the protocol version to use for encode and decode
Version int16 `json:"version"`
// Err contains the topic error, or 0 if there was no error.
Err sarama.KError `json:"err"`
// Name contains the topic name.
Name string `json:"name"`
// IsInternal contains a True if the topic is internal.
IsInternal bool `json:"isInternal"`
// Partitions contains each partition in the topic.
Partitions []*PartitionMetadata `json:"partitions"`
}
type PartitionMetadata struct {
// Version defines the protocol version to use for encode and decode
Version int16 `json:"version"`
// Err contains the partition error, or 0 if there was no error.
Err sarama.KError `json:"err"`
// ID contains the partition index.
ID int32 `json:"ID"`
// Leader contains the ID of the leader broker.
Leader int32 `json:"leader"`
// LeaderEpoch contains the leader epoch of this partition.
LeaderEpoch int32 `json:"leaderEpoch"`
// Replicas contains the set of all nodes that host this partition.
Replicas []int32 `json:"replicas"`
// Isr contains the set of nodes that are in sync with the leader for this partition.
Isr []int32 `json:"isr"`
// OfflineReplicas contains the set of offline replicas of this partition.
OfflineReplicas []int32 `json:"offlineReplicas"`
}
func (this_ *Service) DescribeTopics(topics []string) (res []*TopicMetadata, err error) {
var saramaClient sarama.Client
saramaClient, err = this_.getClient()
if err != nil {
return
}
defer closeSaramaClient(saramaClient)
admin, err := sarama.NewClusterAdminFromClient(saramaClient)
if err != nil {
return
}
defer closeClusterAdmin(admin)
list, err := admin.DescribeTopics(topics)
if err != nil {
return
}
for _, one := range list {
d := &TopicMetadata{
Version: one.Version,
Err: one.Err,
Name: one.Name,
IsInternal: one.IsInternal,
}
for _, v := range one.Partitions {
d.Partitions = append(d.Partitions, &PartitionMetadata{
Version: v.Version,
Err: v.Err,
ID: v.ID,
Leader: v.Leader,
LeaderEpoch: v.LeaderEpoch,
Replicas: v.Replicas,
Isr: v.Isr,
OfflineReplicas: v.OfflineReplicas,
})
}
res = append(res, d)
}
return
}
func (this_ *Service) DeleteRecords(topic string, partitionOffsets map[int32]int64) (err error) {
var saramaClient sarama.Client
saramaClient, err = this_.getClient()
if err != nil {
return
}
defer closeSaramaClient(saramaClient)
admin, err := sarama.NewClusterAdminFromClient(saramaClient)
if err != nil {
return
}
defer closeClusterAdmin(admin)
err = admin.DeleteRecords(topic, partitionOffsets)
return
}
// GetOffset 查询集群以获取
// 主题/分区组合上的给定时间(以毫秒为单位)。
// 对于最早的可用偏移,时间应该是OffsetOldest,
// OffsetNewest是下一次或某一时间将生成的消息的偏移量。
func (this_ *Service) GetOffset(topic string, partitionID int32, time int64) (offset int64, err error) {
var saramaClient sarama.Client
saramaClient, err = this_.getClient()
if err != nil {
return
}
defer closeSaramaClient(saramaClient)
offset, err = saramaClient.GetOffset(topic, partitionID, time)
return
}
func (this_ *Service) Partitions(topic string) (partitions []int32, err error) {
var saramaClient sarama.Client
saramaClient, err = this_.getClient()
if err != nil {
return
}
defer closeSaramaClient(saramaClient)
partitions, err = saramaClient.Partitions(topic)
return
}
// NewSyncProducer 创建生产者
func (this_ *Service) NewSyncProducer() (syncProducer sarama.SyncProducer, err error) {
config := sarama.NewConfig()
config.Producer.Return.Successes = true
config.Producer.Timeout = 3
if this_.Username != "" || this_.Password != "" {
// sasl认证
config.Net.SASL.Enable = true
config.Net.SASL.User = this_.Username
config.Net.SASL.Password = this_.Password
}
if this_.CertPath != "" {
certPool := x509.NewCertPool()
var pemCerts []byte
pemCerts, err = util.ReadFile(this_.CertPath)
if err != nil {
return
}
if !certPool.AppendCertsFromPEM(pemCerts) {
err = errors.New("证书[" + this_.CertPath + "]解析失败")
return
}
TLSClientConfig := &tls.Config{
InsecureSkipVerify: true,
}
TLSClientConfig.RootCAs = certPool
config.Net.TLS.Enable = true
config.Net.TLS.Config = TLSClientConfig
}
syncProducer, err = sarama.NewSyncProducer(this_.GetServers(), config)
if err != nil {
if syncProducer != nil {
_ = syncProducer.Close()
}
return
}
return
}
type ProducerMessage struct {
*sarama.ProducerMessage
}
// Push 推送消息到kafka
func (this_ *Service) Push(msg *Message) (err error) {
producerMessage, err := MessageToProducerMessage(msg)
if err != nil {
return
}
syncProducer, err := this_.NewSyncProducer()
if err != nil {
return
}
defer func() {
_ = syncProducer.Close()
}()
_, _, err = syncProducer.SendMessage(producerMessage)
return err
}
func MessageToProducerMessage(msg *Message) (producerMessage *sarama.ProducerMessage, err error) {
var key sarama.Encoder
var value sarama.Encoder
if msg.Key != "" {
if strings.ToLower(msg.KeyType) == "long" {
longV, err := strconv.ParseInt(msg.Key, 10, 64)
if err != nil {
return nil, err
}
var bytes = make([]byte, 8)
binary.BigEndian.PutUint64(bytes, uint64(longV))
key = sarama.ByteEncoder(bytes)
} else {
key = sarama.ByteEncoder(msg.Key)
}
}
if msg.Value != "" {
if strings.ToLower(msg.ValueType) == "long" {
longV, err := strconv.ParseInt(msg.Value, 10, 64)
if err != nil {
return nil, err
}
var bytes = make([]byte, 8)
binary.BigEndian.PutUint64(bytes, uint64(longV))
value = sarama.ByteEncoder(bytes)
} else {
value = sarama.ByteEncoder(msg.Value)
}
}
producerMessage = &sarama.ProducerMessage{}
producerMessage.Topic = msg.Topic
producerMessage.Key = key
producerMessage.Value = value
if msg.Timestamp == nil || (*msg.Timestamp).IsZero() {
producerMessage.Timestamp = time.Now()
} else {
producerMessage.Timestamp = *msg.Timestamp
}
if msg.Partition != nil {
producerMessage.Partition = *msg.Partition
}
if msg.Offset != nil {
producerMessage.Offset = *msg.Offset
}
if msg.Headers != nil {
for _, one := range msg.Headers {
producerMessage.Headers = append(producerMessage.Headers, sarama.RecordHeader{
Key: []byte(one.Key),
Value: []byte(one.Value),
})
}
}
return
}
func ConsumerMessageToMessage(keyType string, valueType string, consumerMessage *sarama.ConsumerMessage) (msg *Message, err error) {
var key string
var value string
if consumerMessage.Key != nil && len(consumerMessage.Key) > 0 {
if len(consumerMessage.Key) == 8 {
Uint64Key := binary.BigEndian.Uint64(consumerMessage.Key)
int64Key := int64(Uint64Key)
if int64Key >= 0 {
key = strconv.FormatInt(int64Key, 10)
}
}
if key == "" {
key = string(consumerMessage.Key)
}
}
if consumerMessage.Value != nil && len(consumerMessage.Value) > 0 {
if len(consumerMessage.Value) == 8 {
Uint64Value := binary.BigEndian.Uint64(consumerMessage.Value)
int64Value := int64(Uint64Value)
if int64Value >= 0 {
value = strconv.FormatInt(int64Value, 10)
}
}
if value == "" {
value = string(consumerMessage.Value)
}
}
msg = &Message{
Key: key,
Value: value,
Topic: consumerMessage.Topic,
Partition: &consumerMessage.Partition,
Offset: &consumerMessage.Offset,
}
if consumerMessage.Headers != nil {
for _, header := range consumerMessage.Headers {
msg.Headers = append(msg.Headers, MessageHeader{Key: string(header.Key), Value: string(header.Value)})
}
}
return
}
type MessageHeader struct {
Key string `json:"key,omitempty"`
Value string `json:"value,omitempty"`
}
type Message struct {
KeyType string `json:"keyType,omitempty"`
Key string `json:"key,omitempty"`
ValueType string `json:"valueType,omitempty"`
Value string `json:"value,omitempty"`
Topic string `json:"topic,omitempty"`
Partition *int32 `json:"partition,omitempty"`
Offset *int64 `json:"offset,omitempty"`
Headers []MessageHeader `json:"headers,omitempty"`
Timestamp *time.Time `json:"timestamp,omitempty"`
}