Simple Message Queue (formerly MNS):BatchReceiveMessage

Description

You can call this operation to receive a maximum of 16 messages from a queue. After the messages are received, the messages enter the Inactive state. The messages remain Inactive within the period that is specified by the VisibilityTimeout parameter. For more information about the VisibilityTimeout parameter, see CreateQueue.

During the period that is specified by the VisibilityTimeout parameter, you can consume the messages and call the DeleteMessage operation to delete the messages. Otherwise, the messages change to the Active state and can be consumed again after the specified period.

Request

Each request consists of the following parts:

• Request line

  GET /queues/$queueName/messages? numOfMessages=16&waitseconds=10 HTTP/1.1

• Operation-specific URI parameter

  Parameter	Required	Description
  numOfMessages	Yes	The maximum number of messages that can be received.
  waitseconds	No	The maximum period for which the request waits if no message is available in the queue. Unit: seconds.

• Operation-specific request headers

  None.

• Request Body

  None.

Response

Each response consists of the following parts:

• HTTP Status Code

  HTTP/1.1 200 OK

• Operation-specific response headers

  None.

• Response Body

  The response body is in the XML format. The body and parameters of multiple messages are returned.

  Parameter	Description
  MessageId	The ID of the message. The message ID is unique in the queue.
  ReceiptHandle	The receipt handle that was generated when the message was received. You can use the receipt handle of the message to modify or delete the message that is in the Inactive state. The receipt handle is valid only before the time that is specified by the NextVisibleTime parameter.
  MessageBody	The body of the message.
  MessageBodyMD5	The MD5 hash of the message body.
  EnqueueTime	The time when the message was sent to the queue. The value is a timestamp that follows the UNIX time format. It is the number of milliseconds that have elapsed since 00:00:00 Thursday, January 1, 1970.
  NextVisibleTime	The time when the message can be consumed. The value is a timestamp that follows the UNIX time format. It is the number of milliseconds that have elapsed since 00:00:00 Thursday, January 1, 1970.
  FirstDequeueTime	The first time when the message was consumed. The value is a timestamp that follows the UNIX time format. It is the number of milliseconds that have elapsed since 00:00:00 Thursday, January 1, 1970.
  DequeueCount	The total number of times that the message was consumed.
  Priority	The priority of the message.

Examples

Sample requests

GET  /queues/$queueName/messages? numOfMessages=16 HTTP/1.1
Host: $AccountId.mns.cn-hangzhou.aliyuncs.com
Date: Wed, 28 May 2012 22:32:00 GMT
x-mns-version: 2015-06-06
Authorization: MNS 15B4D3461F177624206A:xQE0diMbLRepdf3YB+FIEXA****          

Sample success responses

HTTP/1.1 200 OK
Content-Type=text/xml;charset=utf-8
Content-Length:500
x-mns-request-id:512B2A634403E52B1956****
x-mns-version: 2015-06-06

<? xml version="1.0" encoding="UTF-8"? >
<Messages xmlns="http://mns.aliyuncs.com/doc/v1/">
<Message>
    <MessageId>5F290C926D472878-2-14D9529A8FA-20000****</MessageId>
    <ReceiptHandle>1-ODU4OTkzNDU5My0xNDMyNzI3ODI3LTItOA==</ReceiptHandle>
    <MessageBodyMD5>C5DD56A39F5F7BB8B3337C6D11B6****</MessageBodyMD5>
    <MessageBody>This is a test message</MessageBody>
    <EnqueueTime>1250700979248</EnqueueTime>
    <NextVisibleTime>1250700799348</NextVisibleTime>
    <FirstDequeueTime>1250700779318</FirstDequeueTime >
    <DequeueCount>1</DequeueCount>
    <Priority>8</Priority>
</Message>
<Message>
    <ReceiptHandle>1-ODU4OTkzNDU5My0xNDMyNzI3MjQwLTEtOA==</ReceiptHandle>
    <MessageBodyMD5>C5DD56A39F5F7BB8B3337C6D11B6****</MessageBodyMD5>
    <MessageBody>This is a test message</MessageBody>
    <EnqueueTime>1250700979252</EnqueueTime>
    <NextVisibleTime>1250700799350</NextVisibleTime>
    <FirstDequeueTime>1250700779330</FirstDequeueTime >
    <DequeueCount>1</DequeueCount>
    <Priority>8</Priority>
</Message>
</Messages>           

Special Error