Updated on 2025-08-15 GMT+08:00

Listing Topics of a Kafka Instance

Function

This API is used to query details about topics of a Kafka instance.

Calling Method

For details, see Calling APIs.

URI

GET /v2/{project_id}/instances/{instance_id}/topics

Table 1 Path Parameters

Parameter

Mandatory

Type

Description

project_id

Yes

String

Parameter description:

Project ID. For details, see Obtaining a Project ID.

Constraints:

N/A

Value range:

N/A

Default value:

N/A

instance_id

Yes

String

Definition:

Instance ID. You can call the API for querying all instances to obtain the instance ID. The instance ID is in the response body.

Constraints:

N/A

Range:

N/A

Default Value:

N/A

Table 2 Query Parameters

Parameter

Mandatory

Type

Description

offset

No

String

Parameter description:

Offset, which is the position where the query starts.

Constraints:

N/A

Value range:

≥ 0

Default value:

N/A

limit

No

String

Definition:

Maximum number of instances that can be returned in a query.

Constraints:

N/A

Range:

≥ 0

Default Value:

N/A

Request Parameters

None

Response Parameters

Status code: 200

Table 3 Response body parameters

Parameter

Type

Description

total

Integer

Parameter description:

Total number of topics.

Value range:

N/A

size

Integer

Parameter description:

Indicates the maximum number of records to be displayed on a page.

Value range:

N/A

remain_partitions

Integer

Parameter description:

Number of remaining partitions.

Value range:

N/A

max_partitions

Integer

Parameter description:

Total number of partitions.

Value range:

N/A

topic_max_partitions

Integer

Parameter description:

Maximum number of partitions in a single topic.

Value range:

N/A

topics

Array of TopicEntity objects

Parameter description:

Topic list.

Table 4 TopicEntity

Parameter

Type

Description

policiesOnly

Boolean

Definition:

Whether a policy is default.

Range:

  • true: Yes

  • false: No

name

String

Parameter description:

Topic name.

Value range:

N/A

replication

Integer

Parameter description:

Number of replicas, which is configured to ensure data reliability.

Value range:

N/A

partition

Integer

Parameter description:

Number of topic partitions, which is used to set the number of concurrently consumed messages.

Value range:

N/A

retention_time

Integer

Parameter description:

Retention period of a message.

Value range:

0–720

sync_replication

Boolean

Parameter description:

Whether to enable synchronous replication. This function is disabled by default.

Value range:

  • true: Yes. The acks parameter on the producer client must be set to –1. Otherwise, this parameter does not take effect.

  • false: No.

sync_message_flush

Boolean

Parameter description:

Whether synchronous flushing is enabled. The default value is false. Synchronous flushing compromises performance.

Value range:

  • true: Yes

  • false: No

external_configs

Object

Parameter description:

Extended configuration.

topic_type

Integer

Parameter description:

Topic type.

Value range:

  • 0: common topic

  • 1: system (internal) topic

topic_other_configs

Array of topic_other_configs objects

Parameter description:

Other topic configurations.

topic_desc

String

Parameter description:

Topic description.

Value range:

N/A

created_at

Long

Parameter description:

Topic creation time.

Value range:

N/A

Table 5 topic_other_configs

Parameter

Type

Description

name

String

Parameter description:

Configuration name.

Value range:

N/A

valid_values

String

Parameter description:

Valid value.

Value range:

N/A

default_value

String

Parameter description:

Default value.

Value range:

N/A

config_type

String

Parameter description:

Configuration type.

Value range:

  • dynamic

  • static

value

String

Parameter description:

Configuration value.

Value range:

N/A

value_type

String

Parameter description:

Configuration value type.

Value range:

N/A

Example Requests

Querying the topic list

GET https://{endpoint}/v2/{project_id}/instances/{instance_id}/topics?offset=0&limit=10

Example Responses

Status code: 200

The query is successful.

{
  "total" : 1,
  "size" : 0,
  "topics" : [ {
    "policiesOnly" : false,
    "name" : "Topic-test01",
    "replication" : 3,
    "partition" : 3,
    "retention_time" : 72,
    "sync_replication" : "false",
    "sync_message_flush" : "false",
    "topic_other_configs" : [ {
      "name" : "max.message.bytes",
      "valid_values" : "[0...10485760]",
      "default_value" : "10485760",
      "config_type" : "dynamic",
      "value" : "10485760",
      "value_type" : "int"
    }, {
      "name" : "message.timestamp.type",
      "valid_values" : "[CreateTime, LogAppendTime]",
      "default_value" : "LogAppendTime",
      "config_type" : "dynamic",
      "value" : "LogAppendTime",
      "value_type" : "string"
    } ],
    "external_configs" : { },
    "topic_type" : 0,
    "topic_desc" : "This is a test topic",
    "created_at" : 1688112779916
  } ],
  "remain_partitions" : 294,
  "max_partitions" : 300,
  "topic_max_partitions" : 200
}

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 ListInstanceTopicsSolution {

    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();
        ListInstanceTopicsRequest request = new ListInstanceTopicsRequest();
        request.withInstanceId("{instance_id}");
        try {
            ListInstanceTopicsResponse response = client.listInstanceTopics(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 = ListInstanceTopicsRequest()
        request.instance_id = "{instance_id}"
        response = client.list_instance_topics(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.ListInstanceTopicsRequest{}
	request.InstanceId = "{instance_id}"
	response, err := client.ListInstanceTopics(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.