Updated on 2024-10-21 GMT+08:00

Submitting Checkpoints

Function

This API is used to submit checkpoints.

Calling Method

For details, see Calling APIs.

URI

POST /v2/{project_id}/checkpoints

Table 1 Path Parameters

Parameter

Mandatory

Type

Description

project_id

Yes

String

Project ID

Request Parameters

Table 2 Request header parameters

Parameter

Mandatory

Type

Description

X-Auth-Token

Yes

String

User token

It can be obtained by calling the IAM API used to obtain a user token. The value of X-Subject-Token in the response header is the user token.

Table 3 Request body parameters

Parameter

Mandatory

Type

Description

app_name

Yes

String

Name of the app, which is the unique identifier of a user data consumption program.

checkpoint_type

Yes

String

Type of the checkpoint.

  • LAST_READ: Only sequence numbers are recorded in databases.

Enumeration values:

  • LAST_READ

stream_name

Yes

String

Name of the stream

partition_id

Yes

String

Partition identifier of the stream.Two partition ID formats are available:- shardId-0000000000- 0For example, if a stream has three partitions, the partition IDs are 0, 1, and 2, or shardId-0000000000, shardId-0000000001, and shardId-0000000002.

sequence_number

Yes

String

Sequence number to be submitted, which is used to record the consumption checkpoint of the stream. Ensure that the sequence number is within the valid range.

metadata

No

String

Metadata information of the consumer application.

The metadata information can contain a maximum of 1,000 characters.

Maximum: 1000

Response Parameters

None

Example Requests

Submitting Checkpoints

POST https://{Endpoint}/v2/{project_id}/checkpoints

{
  "stream_name" : "newstream",
  "app_name" : "newapp",
  "partition_id" : "0",
  "sequence_number" : "2",
  "checkpoint_type" : "LAST_READ"
}

Example Responses

None

SDK Sample Code

The SDK sample code is as follows.

Java

Submitting Checkpoints

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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.dis.v2.region.DisRegion;
import com.huaweicloud.sdk.dis.v2.*;
import com.huaweicloud.sdk.dis.v2.model.*;


public class CommitCheckpointSolution {

    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");

        ICredential auth = new BasicCredentials()
                .withAk(ak)
                .withSk(sk);

        DisClient client = DisClient.newBuilder()
                .withCredential(auth)
                .withRegion(DisRegion.valueOf("<YOUR REGION>"))
                .build();
        CommitCheckpointRequest request = new CommitCheckpointRequest();
        CommitCheckpointReq body = new CommitCheckpointReq();
        body.withSequenceNumber("2");
        body.withPartitionId("0");
        body.withStreamName("newstream");
        body.withCheckpointType(CommitCheckpointReq.CheckpointTypeEnum.fromValue("LAST_READ"));
        body.withAppName("newapp");
        request.withBody(body);
        try {
            CommitCheckpointResponse response = client.commitCheckpoint(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());
        }
    }
}

Python

Submitting Checkpoints

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# coding: utf-8

import os
from huaweicloudsdkcore.auth.credentials import BasicCredentials
from huaweicloudsdkdis.v2.region.dis_region import DisRegion
from huaweicloudsdkcore.exceptions import exceptions
from huaweicloudsdkdis.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"]

    credentials = BasicCredentials(ak, sk)

    client = DisClient.new_builder() \
        .with_credentials(credentials) \
        .with_region(DisRegion.value_of("<YOUR REGION>")) \
        .build()

    try:
        request = CommitCheckpointRequest()
        request.body = CommitCheckpointReq(
            sequence_number="2",
            partition_id="0",
            stream_name="newstream",
            checkpoint_type="LAST_READ",
            app_name="newapp"
        )
        response = client.commit_checkpoint(request)
        print(response)
    except exceptions.ClientRequestException as e:
        print(e.status_code)
        print(e.request_id)
        print(e.error_code)
        print(e.error_msg)

Go

Submitting Checkpoints

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package main

import (
	"fmt"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic"
    dis "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dis/v2"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dis/v2/model"
    region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dis/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")

    auth := basic.NewCredentialsBuilder().
        WithAk(ak).
        WithSk(sk).
        Build()

    client := dis.NewDisClient(
        dis.DisClientBuilder().
            WithRegion(region.ValueOf("<YOUR REGION>")).
            WithCredential(auth).
            Build())

    request := &model.CommitCheckpointRequest{}
	request.Body = &model.CommitCheckpointReq{
		SequenceNumber: "2",
		PartitionId: "0",
		StreamName: "newstream",
		CheckpointType: model.GetCommitCheckpointReqCheckpointTypeEnum().LAST_READ,
		AppName: "newapp",
	}
	response, err := client.CommitCheckpoint(request)
	if err == nil {
        fmt.Printf("%+v\n", response)
    } else {
        fmt.Println(err)
    }
}

More

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

201

Normal response

Error Codes

See Error Codes.