Querying Messages
Function
This API is used to query messages.
Calling Method
For details, see Calling APIs.
URI
GET /v2/{engine}/{project_id}/instances/{instance_id}/messages
|
Parameter |
Mandatory |
Type |
Description |
|---|---|---|---|
|
engine |
Yes |
String |
Definition Message engine. Constraints N/A Range
Default Value N/A |
|
project_id |
Yes |
String |
Definition Project ID. For details about how to obtain it, see Obtaining a Project ID. Constraints N/A 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 |
|
Parameter |
Mandatory |
Type |
Description |
|---|---|---|---|
|
topic |
Yes |
String |
Topic name. |
|
queue |
No |
String |
Queue. |
|
limit |
No |
Integer |
Number of records to query. |
|
offset |
No |
Integer |
Offset, which is the position where the query starts. The value must be greater than or equal to 0. |
|
key |
No |
String |
Key of a message. |
|
start_time |
No |
String |
Start time. This parameter is mandatory when msg_id is not used for query. |
|
end_time |
No |
String |
End time. This parameter is mandatory when msg_id is not used for query. |
|
msg_id |
No |
String |
Definition Message ID. Constraints Mandatory when a time range is not used for query. Range N/A Default Value N/A |
Request Parameters
None
Response Parameters
Status code: 200
|
Parameter |
Type |
Description |
|---|---|---|
|
messages |
Array of Message objects |
Definition Message list. Constraints N/A Range N/A Default Value N/A |
|
total |
Number |
Definition Total number of messages. Constraints N/A Range N/A Default Value N/A |
|
Parameter |
Type |
Description |
|---|---|---|
|
msg_id |
String |
Definition Message ID. Constraints N/A Range N/A Default Value N/A |
|
instance_id |
String |
Definition Instance ID. Constraints N/A Range N/A Default Value N/A |
|
topic |
String |
Definition Topic name. Constraints N/A Range N/A Default Value N/A |
|
store_timestamp |
Number |
Definition Time when the message is stored. Constraints N/A Range N/A Default Value N/A |
|
born_timestamp |
Number |
Definition Time when the message is generated. Constraints N/A Range N/A Default Value N/A |
|
reconsume_times |
Integer |
Number of retry times. |
|
body |
String |
Definition Message body. Constraints N/A Range N/A Default Value N/A |
|
body_crc |
Number |
Definition Message body checksum. Constraints N/A Range N/A Default Value N/A |
|
store_size |
Number |
Definition Storage size. Constraints N/A Range N/A Default Value N/A |
|
property_list |
Array of property_list objects |
Definition Message attribute list. Constraints N/A Range N/A Default Value N/A |
|
born_host |
String |
Definition IP address of the host that generates the message. Constraints N/A Range N/A Default Value N/A |
|
store_host |
String |
Definition IP address of the host that stores the message. Constraints N/A Range N/A Default Value N/A |
|
queue_id |
Integer |
Definition Queue ID. Constraints N/A Range N/A Default Value N/A |
|
queue_offset |
Integer |
Definition Offset in the queue. Constraints N/A Range N/A Default Value N/A |
Example Requests
Querying messages
GET https://{endpoint}/v2/{engine}/{project_id}/instances/{instance_id}/messages?topic={topic}&msg_id=C0A807C9000027740000000000000030
Example Responses
Status code: 200
Messages queried successfully.
{
"messages" : [ {
"msg_id" : "C0A807C9000027740000000000000030",
"instance_id" : "11c45539-xxxx-xxxx-xxxx-812c41f61f30",
"topic" : "topic-test",
"store_timestamp" : 1648888166319,
"born_timestamp" : 1648888166275,
"reconsume_times" : 0,
"body" : "xxxx",
"body_crc" : 1932557065,
"store_size" : 175,
"property_list" : [ {
"name" : "KEYS",
"value" : ""
}, {
"name" : "UNIQ_KEY",
"value" : "7F00000123DC6E0BE85808B037820000"
}, {
"name" : "CLUSTER",
"value" : "DmsCluster"
}, {
"name" : "TAGS",
"value" : ""
} ],
"born_host" : "192.168.0.66:50098",
"store_host" : "192.168.7.201:10100",
"queue_id" : 2,
"queue_offset" : 0
} ],
"total" : 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.rocketmq.v2.region.RocketMQRegion; import com.huaweicloud.sdk.rocketmq.v2.*; import com.huaweicloud.sdk.rocketmq.v2.model.*; public class ListMessagesSolution { 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(); ListMessagesRequest request = new ListMessagesRequest(); request.withEngine(ListMessagesRequest.EngineEnum.fromValue("{engine}")); request.withInstanceId("{instance_id}"); try { ListMessagesResponse response = client.listMessages(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 = ListMessagesRequest() request.engine = "{engine}" request.instance_id = "{instance_id}" response = client.list_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" 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.ListMessagesRequest{} request.Engine = model.GetListMessagesRequestEngineEnum().ENGINE request.InstanceId = "{instance_id}" response, err := client.ListMessages(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 |
Messages queried successfully. |
Error Codes
See Error Codes.
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