Querying Topic Details
Function
This API is used to query topic details of a Kafka instance. (Up to 1s for each instance call)
Calling Method
For details, see Calling APIs.
URI
GET /v2/{project_id}/instances/{instance_id}/management/topics/{topic}
Parameter |
Mandatory |
Type |
Description |
---|---|---|---|
project_id |
Yes |
String |
Project ID. For details about how to obtain it, see Obtaining a Project ID. |
instance_id |
Yes |
String |
Instance ID. |
topic |
Yes |
String |
Topic name. |
Request Parameters
None
Response Parameters
Status code: 200
Parameter |
Type |
Description |
---|---|---|
topic |
String |
Topic name. |
partitions |
Array of partitions objects |
Partition list. |
group_subscribed |
Array of strings |
List of consumer groups that subscribe to the topic. |
Parameter |
Type |
Description |
---|---|---|
partition |
Integer |
Partition ID. |
leader |
Integer |
ID of the broker where the leader replica resides. |
leo |
Integer |
LEO of the partition leader replica. |
hw |
Integer |
High watermark (HW) of the partition. |
lso |
Integer |
Log start offset (LSO) of the partition leader replica. |
last_update_timestamp |
Long |
Time when the last message was written to the partition. The value is a Unix timestamp. Unit: ms |
replicas |
Array of replicas objects |
Replica list. |
Parameter |
Type |
Description |
---|---|---|
broker |
Integer |
ID of the broker where the replica resides. |
leader |
Boolean |
Whether the replica is the leader. |
in_sync |
Boolean |
Whether the replica is in the ISR. |
size |
Integer |
Current log size of the replica. Unit: byte. |
lag |
Long |
Number of messages that lag behind the high watermark in the replica. |
Example Requests
Querying details about a specified topic
GET https://{endpoint}/v2/{project_id}/instances/{instance_id}/management/topics/{topic}
Example Responses
Status code: 200
The query is successful.
{ "topic" : "test", "partitions" : [ { "partition" : 0, "leader" : 2, "replicas" : [ { "broker" : 2, "leader" : true, "in_sync" : true, "size" : 123971146, "lag" : 0 }, { "broker" : 1, "leader" : false, "in_sync" : true, "size" : 123971146, "lag" : 0 }, { "broker" : 0, "leader" : false, "in_sync" : true, "size" : 123971146, "lag" : 0 } ], "lso" : 0, "leo" : 13598, "hw" : 13598, "last_update_timestamp" : 1571477180985 }, { "partition" : 2, "leader" : 1, "replicas" : [ { "broker" : 1, "leader" : true, "in_sync" : true, "size" : 123889531, "lag" : 0 }, { "broker" : 0, "leader" : false, "in_sync" : true, "size" : 123889531, "lag" : 0 }, { "broker" : 2, "leader" : false, "in_sync" : true, "size" : 123889531, "lag" : 0 } ], "lso" : 0, "leo" : 13601, "hw" : 13601, "last_update_timestamp" : 1571477077146 }, { "partition" : 1, "leader" : 0, "replicas" : [ { "broker" : 0, "leader" : true, "in_sync" : true, "size" : 127245604, "lag" : 0 }, { "broker" : 2, "leader" : false, "in_sync" : true, "size" : 127245604, "lag" : 0 }, { "broker" : 1, "leader" : false, "in_sync" : true, "size" : 127245604, "lag" : 0 } ], "lso" : 0, "leo" : 13599, "hw" : 13599, "last_update_timestamp" : 1571477172959 } ], "group_subscribed" : [ "test-consumer-group" ] }
SDK Sample Code
The SDK sample code is as follows.
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package com.huaweicloud.sdk.test; import com.huaweicloud.sdk.core.auth.ICredential; import com.huaweicloud.sdk.core.auth.BasicCredentials; import com.huaweicloud.sdk.core.exception.ConnectionException; import com.huaweicloud.sdk.core.exception.RequestTimeoutException; import com.huaweicloud.sdk.core.exception.ServiceResponseException; import com.huaweicloud.sdk.kafka.v2.region.KafkaRegion; import com.huaweicloud.sdk.kafka.v2.*; import com.huaweicloud.sdk.kafka.v2.model.*; public class ShowInstanceTopicDetailSolution { public static void main(String[] args) { // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security. // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment String ak = System.getenv("CLOUD_SDK_AK"); String sk = System.getenv("CLOUD_SDK_SK"); String projectId = "{project_id}"; ICredential auth = new BasicCredentials() .withProjectId(projectId) .withAk(ak) .withSk(sk); KafkaClient client = KafkaClient.newBuilder() .withCredential(auth) .withRegion(KafkaRegion.valueOf("<YOUR REGION>")) .build(); ShowInstanceTopicDetailRequest request = new ShowInstanceTopicDetailRequest(); request.withInstanceId("{instance_id}"); request.withTopic("{topic}"); try { ShowInstanceTopicDetailResponse response = client.showInstanceTopicDetail(request); System.out.println(response.toString()); } catch (ConnectionException e) { e.printStackTrace(); } catch (RequestTimeoutException e) { e.printStackTrace(); } catch (ServiceResponseException e) { e.printStackTrace(); System.out.println(e.getHttpStatusCode()); System.out.println(e.getRequestId()); System.out.println(e.getErrorCode()); System.out.println(e.getErrorMsg()); } } } |
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# coding: utf-8 import os from huaweicloudsdkcore.auth.credentials import BasicCredentials from huaweicloudsdkkafka.v2.region.kafka_region import KafkaRegion from huaweicloudsdkcore.exceptions import exceptions from huaweicloudsdkkafka.v2 import * if __name__ == "__main__": # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security. # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment ak = os.environ["CLOUD_SDK_AK"] sk = os.environ["CLOUD_SDK_SK"] projectId = "{project_id}" credentials = BasicCredentials(ak, sk, projectId) client = KafkaClient.new_builder() \ .with_credentials(credentials) \ .with_region(KafkaRegion.value_of("<YOUR REGION>")) \ .build() try: request = ShowInstanceTopicDetailRequest() request.instance_id = "{instance_id}" request.topic = "{topic}" response = client.show_instance_topic_detail(request) print(response) except exceptions.ClientRequestException as e: print(e.status_code) print(e.request_id) print(e.error_code) print(e.error_msg) |
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package main import ( "fmt" "github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic" kafka "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/kafka/v2" "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/kafka/v2/model" region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/kafka/v2/region" ) func main() { // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security. // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment ak := os.Getenv("CLOUD_SDK_AK") sk := os.Getenv("CLOUD_SDK_SK") projectId := "{project_id}" auth := basic.NewCredentialsBuilder(). WithAk(ak). WithSk(sk). WithProjectId(projectId). Build() client := kafka.NewKafkaClient( kafka.KafkaClientBuilder(). WithRegion(region.ValueOf("<YOUR REGION>")). WithCredential(auth). Build()) request := &model.ShowInstanceTopicDetailRequest{} request.InstanceId = "{instance_id}" request.Topic = "{topic}" response, err := client.ShowInstanceTopicDetail(request) if err == nil { fmt.Printf("%+v\n", response) } else { fmt.Println(err) } } |
For SDK sample code of more programming languages, see the Sample Code tab in API Explorer. SDK sample code can be automatically generated.
Status Codes
Status Code |
Description |
---|---|
200 |
The query is successful. |
Error Codes
See Error Codes.
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