Added topic id to describeTopics Response (#1068)

Added topic id to describe topics response

examples/admin_describe_topics/admin_describe_topics.go

@@ -79,6 +79,7 @@ func main() {
 			continue
 		}
 		fmt.Printf("Topic: %s has succeeded\n", t.Name)
+		fmt.Printf("Topic Id: %s\n", t.TopicID)
 		if includeAuthorizedOperations {
 			fmt.Printf("Allowed operations: %s\n", t.AuthorizedOperations)
 		}

kafka/adminapi.go

@@ -331,6 +331,8 @@ type TopicPartitionInfo struct {
 type TopicDescription struct {
 	// Topic name.
 	Name string
+	// Topic Id
+	TopicID UUID
 	// Error, if any, of the result. Check with `Error.Code() != ErrNoError`.
 	Error Error
 	// Is the topic internal to Kafka?
@@ -1098,6 +1100,16 @@ func (a *AdminClient) cToAuthorizedOperations(
 	return authorizedOperations
 }
 
+// cToUUID converts a C rd_kafka_Uuid_t to a Go UUID.
+func (a *AdminClient) cToUUID(cUUID *C.rd_kafka_Uuid_t) UUID {
+	uuid := UUID{
+		mostSignificantBits: int64(C.rd_kafka_Uuid_most_significant_bits(cUUID)),
+		leastSignificantBits: int64(C.rd_kafka_Uuid_least_significant_bits(cUUID)),
+		base64str: C.GoString(C.rd_kafka_Uuid_base64str(cUUID)),
+	}
+	return uuid
+}
+
 // cToNode converts a C Node_t* to a Go Node.
 // If cNode is nil returns a Node with ID: -1.
 func (a *AdminClient) cToNode(cNode *C.rd_kafka_Node_t) Node {
@@ -1251,6 +1263,7 @@ func (a *AdminClient) cToTopicDescriptions(
 
 		topicName := C.GoString(
 			C.rd_kafka_TopicDescription_name(cTopic))
+		TopicID := a.cToUUID(C.rd_kafka_TopicDescription_topic_id(cTopic))
 		err := newErrorFromCError(
 			C.rd_kafka_TopicDescription_error(cTopic))
 
@@ -1279,6 +1292,7 @@ func (a *AdminClient) cToTopicDescriptions(
 
 		result[idx] = TopicDescription{
 			Name:                 topicName,
+			TopicID:              TopicID,
 			Error:                err,
 			Partitions:           partitions,
 			AuthorizedOperations: authorizedOperations,

kafka/integration_test.go

@@ -1420,6 +1420,9 @@ func (its *IntegrationTestSuite) TestAdminClient_DescribeTopics() {
 		"Expected correct error for nonexistent topic")
 
 	topicDesc := topicDescs[0]
+	assert.NotZero(topicDesc.TopicID.GetLeastSignificantBits())
+	assert.NotZero(topicDesc.TopicID.GetMostSignificantBits())
+	assert.NotEmpty(topicDesc.TopicID.String())
 	assert.Equal(topicDesc.Error.Code(), ErrNoError,
 		"Topic description should not have an error")
 	assert.False(topicDesc.IsInternal, "Topic should not be internal")

kafka/kafka.go

@@ -334,6 +334,31 @@ func (n Node) String() string {
 	return fmt.Sprintf("[%s:%d]/%d", n.Host, n.Port, n.ID)
 }
 
+// UUID Kafka UUID representation
+type UUID struct {
+	// Most Significant Bits.
+	mostSignificantBits int64
+	// Least Significant Bits.
+	leastSignificantBits int64
+	// Base64 representation
+	base64str string
+}
+
+// Base64 string representation of the UUID
+func (uuid UUID) String() string {
+	return uuid.base64str
+}
+
+// GetMostSignificantBits returns Most Significant 64 bits of the 128 bits UUID
+func (uuid UUID) GetMostSignificantBits() int64 {
+	return uuid.mostSignificantBits
+}
+
+// GetLeastSignificantBits returns Least Significant 64 bits of the 128 bits UUID
+func (uuid UUID) GetLeastSignificantBits() int64 {
+	return uuid.leastSignificantBits
+}
+
 // ConsumerGroupTopicPartitions represents a consumer group's TopicPartitions.
 type ConsumerGroupTopicPartitions struct {
 	// Group name