Querying a Message with a Specified Time Period

Function

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

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
}