Monitor a delivery request progress

Introduction

This section describes how to subscribe to events sent by rs-delivery microservice about submitted delivery requests as described in Publish a delivery request event.

Regards AMQP api

The Regards AMQP API concept describe how AMQP interfaces must be handled to submit events or to subscribe to events.

Exchange

Delivery requests responses from REGARDS are sent to exchange :

Exchange	Virtual host
regards.broadcast.fr.cnes.regards.modules.ltamanager.amqp.output.DeliveryResponseDtoEvent	regards.multitenant.manager

Queue

Every consumer of this exchange must create its own queue bound to this exchange.

Message format

Properties

Parameter	Type	Description
app_id	String	Standard RabbitMQ property to track message origin.
priority	Integer	Standard RabbitMQ property to sort messages by priority order.
content_encoding	String	Standard RabbitMQ property for the encoding type of the message
content_type	String	Standard RabbitMQ property for the MIME Type of the message sent
delivery_mode	Integer	Standard RabbitMQ property for the delivery mode (persistent or not)

Headers

Parameter	Type	Description
regards.tenant	String	Tenant name depends on REGARDS instance project configuration.
regards.type	String	Type of content of the message

Example of the properties and headers of an Ingest request event message

{
  "app_id": "{ID of app}",
  "priority": 1,
  "delivery_mode": 2,
  "content_encoding": "UTF-8",
  "content_type": "application/json",
  "headers": [
    {
      "regards.tenant": "REGARDS",
      "regards.type": "fr.cnes.regards.modules.delivery.amqp.output.DeliveryResponseDtoEvent"
    }
  ]
}

GRANTED body

REGARDS publishes a granted notification when the delivery request is valid and ready to be processed.

{
  "correlationId": "xxx",
  "status": "GRANTED"
}

Parameter	Type	Optional	Description
correlationId	String	No	Request identifier.
status	String	No	The request is granted.

DONE body

REGARDS publishes a done notification when the delivery has been processed successfully, i.e, the zip with files ordered has been uploaded to the S3 server.

{
  "correlationId": "xxx",
  "status": "DONE",
  "url": "xxx",
  "md5": "xxx"
}

Parameter	Type	Optional	Description
correlationId	String	No	Request identifier.
status	String	No	The delivery request has been processed successfully.
url	String	No	S3 formatted zip location (s3://bucket/correlationId/zipName.zip).
md5	String	No	Zip checksum in MD5 format.

DENIED body

REGARDS publishes a denied notification when the request is not valid.

{
  "correlationId": "xxx",
  "status": "DENIED",
  "message": "xxx",
  "errorType": "xxx"
}

Parameter	Type	Optional	Description
correlationId	String	No	Request identifier.
status	String	No	The request cannot be processed.
message	String	Yes	Description of the error.
errorType	String	No	Associated error code.

A request can be invalid, if the delivery request is not well-formed.

How to handle it?

See the request format, fix your payload and submit a new request.

ERROR body

After request has been granted by REGARDS, internal errors may occur. In such case, an error response will be published on the response exchange.

{
  "correlationId": "xxx",
  "status": "ERROR",
  "message": "xxx",
  "errorType": "xxx"
}

Parameter	Type	Optional	Description
correlationId	String	No	Request identifier.
status	String	No	The request cannot be processed.
message	String	Yes	Description of the error.
errorType	String	No	Associated error code.

There are several error types:

Error Type	Description
INVALID_CONTENT	The delivery request is malformed.
FORBIDDEN	The provided user is not allowed to access delivery features.
ORDER_LIMIT_REACHED	The order requested is too big and cannot be performed.
TOO_MANY_SUBORDERS	The order returns more than one sub-order for a given delivery request. Only one sub-order is allowed for now.
EMPTY_ORDER	The order requested contains no data to order.
EXPIRED	The delivery request has expired.
INTERNAL_ERROR	An internal error occurred during the processing of the order.

How to handle it?

Retry later with a new request or contact REGARDS administrators.