Querying Offset of the Earliest Message in a Partition
Function
This API is used to query the offset of the earliest message in a partition.
Calling Method
For details, see Calling APIs.
URI
GET /v2/{project_id}/instances/{instance_id}/management/topics/{topic}/partitions/{partition}/beginning-message
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 Kafka console and find the instance ID on the Kafka instance details page. Constraints: N/A Value range: N/A Default value: N/A |
topic |
Yes |
String |
Parameter description: Topic name. Constraints: A topic name must start with a letter and can only contain letters, hyphens (-), underscores (_), and digits. Value range: N/A Default value: N/A |
partition |
Yes |
Integer |
Parameter description: Partition ID. Constraints: N/A Value range: N/A Default value: N/A |
Request Parameters
None
Response Parameters
Status code: 200
Parameter |
Type |
Description |
---|---|---|
topic |
String |
Parameter description: Topic name. Value range: N/A |
partition |
Integer |
Parameter description: Partition ID. Value range: N/A |
offset |
Integer |
Parameter description: Message offset. Value range: N/A |
timestamp |
Long |
Parameter description: Message production time. The value is a Unix timestamp. The unit is millisecond. Value range: N/A |
Example Requests
GET https://{endpoint}/v2/{project_id}/instances/{instance_id}/management/topics/{topic}/partitions/{partition}/beginning-message
Example Responses
Status code: 200
The offset of the earliest message in a partition is queried successfully.
{ "topic" : "mytest", "partition" : 0, "offset" : 9, "timestamp" : 1568125039164 }
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 ShowPartitionBeginningMessageSolution { 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(); ShowPartitionBeginningMessageRequest request = new ShowPartitionBeginningMessageRequest(); request.withInstanceId("{instance_id}"); request.withTopic("{topic}"); request.withPartition({partition}); try { ShowPartitionBeginningMessageResponse response = client.showPartitionBeginningMessage(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 = ShowPartitionBeginningMessageRequest() request.instance_id = "{instance_id}" request.topic = "{topic}" request.partition = {partition} response = client.show_partition_beginning_message(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.ShowPartitionBeginningMessageRequest{} request.InstanceId = "{instance_id}" request.Topic = "{topic}" request.Partition = int32({partition}) response, err := client.ShowPartitionBeginningMessage(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 offset of the earliest message in a partition is queried successfully. |
Error Codes
See Error Codes.
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