Querying the Number of Messages in a Topic
Function
This API is used to query the number of messages in a topic.
Calling Method
For details, see Calling APIs.
URI
GET /v2/{project_id}/instances/{instance_id}/topics/{topic}/status
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 |
Parameter description: Instance ID. To obtain it, log in to the RocketMQ console and find the instance ID on the RocketMQ instance details page. Constraints: N/A Value range: N/A Default value: N/A |
topic |
Yes |
String |
Parameter description: Topic name. Constraints: N/A Value range: N/A Default value: N/A |
Request Parameters
None
Response Parameters
Status code: 200
Parameter |
Type |
Description |
---|---|---|
max_offset |
Integer |
Parameter description: Maximum offset. Value range: N/A |
min_offset |
Integer |
Parameter description: Minimum offset. Value range: N/A |
brokers |
Array of brokers objects |
Parameter description: Brokers. |
Parameter |
Type |
Description |
---|---|---|
queues |
Array of queues objects |
Parameter description: Queue list. |
broker_name |
String |
Parameter description: Broker name. Value range: N/A |
Parameter |
Type |
Description |
---|---|---|
id |
Integer |
Parameter description: Queue ID. Value range: N/A |
min_offset |
Integer |
Parameter description: Minimum offset. Value range: N/A |
max_offset |
Integer |
Parameter description: Maximum offset. Value range: N/A |
last_message_time |
Long |
Parameter description: Time of the last message. Value range: N/A |
Example Requests
Querying the number of messages in a specified topic
GET https://{endpoint}/v2/{project_id}/instances/{instance_id}/topics/{topic}/status
Example Responses
Status code: 200
Successful
Successful.
{ "brokers" : { "queues" : [ { "id" : 0, "min_offset" : 0, "max_offset" : 2, "last_message_time" : 1662689877152 } ], "broker_name" : "broker-0" } }
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.rocketmq.v2.region.RocketMQRegion; import com.huaweicloud.sdk.rocketmq.v2.*; import com.huaweicloud.sdk.rocketmq.v2.model.*; public class ShowTopicStatusSolution { 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); RocketMQClient client = RocketMQClient.newBuilder() .withCredential(auth) .withRegion(RocketMQRegion.valueOf("<YOUR REGION>")) .build(); ShowTopicStatusRequest request = new ShowTopicStatusRequest(); request.withInstanceId("{instance_id}"); request.withTopic("{topic}"); try { ShowTopicStatusResponse response = client.showTopicStatus(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 huaweicloudsdkrocketmq.v2.region.rocketmq_region import RocketMQRegion from huaweicloudsdkcore.exceptions import exceptions from huaweicloudsdkrocketmq.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 = RocketMQClient.new_builder() \ .with_credentials(credentials) \ .with_region(RocketMQRegion.value_of("<YOUR REGION>")) \ .build() try: request = ShowTopicStatusRequest() request.instance_id = "{instance_id}" request.topic = "{topic}" response = client.show_topic_status(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" rocketmq "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/rocketmq/v2" "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/rocketmq/v2/model" region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/rocketmq/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 := rocketmq.NewRocketMQClient( rocketmq.RocketMQClientBuilder(). WithRegion(region.ValueOf("<YOUR REGION>")). WithCredential(auth). Build()) request := &model.ShowTopicStatusRequest{} request.InstanceId = "{instance_id}" request.Topic = "{topic}" response, err := client.ShowTopicStatus(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 |
Successful |
Error Codes
See Error Codes.
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