Version: 2.0

Create product

This section describes how to submit a new product to the Feature manager or rs-fem service of REGARDS with AMQP interfaces.

Introduction

To create a product through AMQP API, you have to submit a product in GeoJson format with some additional information. This additional information allows you to:

Choose product versioning method.
Choose method to handle product associated files.
Add meta information about the creation process.

The diagram below explains the global processing of a new Feature submission request by REGARDS system.
For a REGARDS client using message queuing, responses are sent for each change of your request status:

DENIED : Your request has been denied (possibly malformed request).
GRANTED : Your request has been granted and will be processed soon.
ERROR : Processing of your granted request finished in error status.
SUCCESS : Processing of your granted request finished with success. Your feature is successfully created and associated files are stored.

sequence

Requests and responses are linked with a correlation identifier requestId provided into submission requests and added in service responses.

caution

When you submit a Feature submission request you have to ensure that the provided requestId is unique. Service will respond to your request with this identifier.

AMQP API

How to

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

Exchange

Submission requests have to be published to this REGARDS RabbitMQ exchange:

Exchange	Virtual host
`regards.broadcast.fr.cnes.regards.modules.feature.dto.event.in.FeatureCreationRequestEvent`	`regards.multitenant.manager`

Request content

Properties

Parameter	Type	Description
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

Header	Value
regards.tenant	The tenant or project to request. It must be an existing Regards tenant.
regards.request.id	String of max 36 characters long. You must ensure that this id is unique.
regards.request.date	ISO 8601 date. See How it works section for more information.
regards.request.owner	String of max 128 characters long

info

Use the request date parameter to delay the request processing. The given date will be the execution date of your request. If a past date is provided, request will be processed as soon as possible.

Body

Property	Type
metadata	See below
feature	(look at description here)

With metadata being described as this:

Path	Type	Description	Optional
priority	`String`	`HIGH`, `NORMAL`, `LOW`. See How it works section for more information.
override	`Boolean`	Indicates whether the previous version should be overridden or not (only for request without provided URN). See How it works section for more information.	true
updateIfExists	`Boolean`	If URN is provided and an associated feature already exists, indicates whether the feature should be updated with the new parameters or not. See How it works section for more information.	true
session	`String`	Arbitrary session name to classify data for human operators.
sessionOwner	`String`	Arbitrary session owner to classify data for human operators.
storages	`Array`	Target storages if there are files to store (may be an empty list!). See How it works section for more information.	false
storages[].pluginBusinessId	`String`	Storage plugin identifier (previously configured in `Storage Management`.	false
storages[].targetTypes	`Array`	List of data object types accepted by this storage location.	true
storages[].storePath	`String`	Directory in which to store the file.	true

Exemple with files storage

A request with file storage means that you want REGARDS to move the products files to one or many configured storage locations. See How it works section for more information.

This feature creation request contains one product with only one file that will be stored on a Local Regards data storage. That means that the Regards system and more precisely the rs-storage microservice must be able to access this file in order to copy it to the destination storage. Storage locations are configured in the storage microservice.

info

This exemple is the way to ask rs-fem microservice to move files to the selected storage location(s) of your choice.

# Headers
regards.tenant=project1
regards.request.id=12345463-0f6b-4488-b58c-52af3f7e9563
regards.request.owner=owner
regards.request.date=2019-07-04T01:03:00

Example of feature creation request body
{
  "metadata": {
    "sessionOwner": "owner",
    "session": "session",
    "storages": [
      {
        "pluginBusinessId": "Local"
      }
    ],
    "priority": "NORMAL"
  },
  "feature": {
    "entityType": "DATA",
    "model": "FEATURE01",
    "files": [
      {
        "locations": [
          {
            "storage": null,
            "url": "http://www.test.com/filename.xml"
          }
        ],
        "attributes": {
          "dataType": "RAWDATA",
          "mimeType": "application/xml",
          "filename": "filename",
          "filesize": 100,
          "algorithm": "MD5",
          "checksum": "checksum"
        }
      }
    ],
    "id": "MyId",
    "geometry": {
      "coordinates": [
        10.0,
        20.0
      ],
      "type": "Point",
      "bbox": null,
      "crs": null
    },
    "normalizedGeometry": null,
    "properties": {
      "data_type": "TYPE01",
      "file_characterization": {
        "valid": true
      }
    },
    "type": "Feature"
  }
}

Exemple with file reference

A request with file reference means that you want REGARDS to reference files without moving them from the given location. See How it works section for more information.

This product contains only one file located on an S3 server. As the storage location of the file is provided, S3Server Regards system will not try to store the file but only references its given location. Nevertheless, with this system you must provide :

Storage location name : Should be an existing storage location defined on rs-storage microservice. If not, the file will be considered as Offline and will not be accessible for download.
File size in bytes : Regards will not access the file by itself so the information must be provided.

info

This exemple is the way to ask rs-fem microservice to only reference the files in your product without moving any file.

# Headers
regards.tenant=project1
regards.request.id=12345463-0f6b-4488-b58c-52af3f7e9563
regards.request.owner=owner
regards.request.date=2019-07-04T01:03:00

Example of feature creation request body
{
  "metadata": {
    "sessionOwner": "owner",
    "session": "session",
    "storages": [],
    "priority": "NORMAL"
  },
  "feature": {
    "entityType": "DATA",
    "model": "FEATURE01",
    "files": [
      {
        "locations": [
          {
            "storage": "S3Server",
            "url": "http://www.test.com/bucket1/filename.xml"
          }
        ],
        "attributes": {
          "dataType": "RAWDATA",
          "mimeType": "application/xml",
          "filename": "filename",
          "filesize": 100,
          "algorithm": "MD5",
          "checksum": "checksum"
        }
      }
    ],
    "id": "MyId",
    "geometry": {
      "coordinates": [
        10.0,
        20.0
      ],
      "type": "Point",
      "bbox": null,
      "crs": null
    },
    "normalizedGeometry": null,
    "properties": {
      "data_type": "TYPE01",
      "file_characterization": {
        "valid": true
      }
    },
    "type": "Feature"
  }
}

Responses format

To learn how to subscribe to your request responses as described in the introduction diagram see Subscribe to responses.

Introduction​

AMQP API​

How to​

Exchange​

Request content​

Properties​

Headers​

Body​

Exemple with files storage​

Exemple with file reference​

Responses format​

Introduction

AMQP API

How to

Exchange

Request content

Properties

Headers

Body

Exemple with files storage

Exemple with file reference

Responses format