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

Querying a Message with a Specified Time Period

Function

This API is used to query a message with a specified time period.

Calling Method

For details, see Calling APIs.

URI

GET /v2/{project_id}/instances/{instance_id}/management/topics/{topic}/messages

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

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

Table 2 Query Parameters

Parameter

Mandatory

Type

Description

start_time

No

String

Parameter description:

Query start time as a Unix timestamp.

Constraints:

N/A

Value range:

N/A

Default value:

0

end_time

No

String

Parameter description:

Query end time as a Unix timestamp.

Constraints:

N/A

Value range:

N/A

Default value:

Current system time.

limit

No

Integer

Parameter description:

Number of messages returned on a page.

Constraints:

N/A

Value range:

N/A

Default value:

10

offset

No

Integer

Parameter description:

Offset, which is the position where the query starts.

Constraints:

N/A

Value range:

≥ 0

Default value:

N/A

partition

No

String

Parameter description:

Partition ID.

Constraints:

N/A

Value range:

N/A

Default value:

The default value is -1, indicating that all partitions are queried.

Request Parameters

None

Response Parameters

Status code: 200

Table 3 Response body parameters

Parameter

Type

Description

messages

Array of messages objects

Parameter description:

Message list.

messages_count

Integer

Parameter description:

Total number of messages.

Value range:

N/A

offsets_count

Integer

Parameter description:

Total number of pages.

Value range:

N/A

offset

Integer

Parameter description:

Current page number.

Value range:

N/A

Table 4 messages

Parameter

Type

Description

topic

String

Parameter description:

Topic name.

Value range:

N/A

partition

Integer

Parameter description:

Partition ID.

Value range:

N/A

message_offset

Long

Parameter description:

Message ID.

Value range:

N/A

size

Integer

Parameter description:

Message size, in bytes.

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}/messages

Example Responses

Status code: 200

The message with the specified time period is queried successfully.

{
  "messages" : [ {
    "topic" : "mytest",
    "partition" : 0,
    "message_offset" : 7,
    "size" : 6,
    "timestamp" : 1568125036045
  } ],
  "messages_count" : 1,
  "offsets_count" : 1,
  "offset" : 1
}

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 ShowMessagesSolution {

    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();
        ShowMessagesRequest request = new ShowMessagesRequest();
        request.withInstanceId("{instance_id}");
        request.withTopic("{topic}");
        try {
            ShowMessagesResponse response = client.showMessages(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 = ShowMessagesRequest()
        request.instance_id = "{instance_id}"
        request.topic = "{topic}"
        response = client.show_messages(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.ShowMessagesRequest{}
	request.InstanceId = "{instance_id}"
	request.Topic = "{topic}"
	response, err := client.ShowMessages(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 message with the specified time period is queried successfully.

Error Codes

See Error Codes.