fiware / tutorials.subscriptions

:blue_book: FIWARE 106: Subscribing to Changes in Context

These tutorials teach FIWARE users about how to create and manage context data subscriptions. The tutorials build on the entities and Stock Management / Smart Farm applications created in previous tutorials to enable users to fully understand the NGSI Subscribe/Notify paradigm and how to use NGSI subscriptions within their own code.

The tutorial refers to actions made within the browser combined with cUrl commands. The cUrl commands are also available as Postman documentation

Start-Up

NGSI-v2 Smart Supermarket

NGSI-v2 offers JSON based interoperability used in individual Smart Systems. To run this tutorial with NGSI-v2, use the NGSI-v2 branch.

git clone https://github.com/FIWARE/tutorials.Subscriptions.git
cd tutorials.Subscriptions
git checkout NGSI-v2

./services create
./services start

	📚 Documentation	Postman Collection

NGSI-LD Smart Farm

NGSI-LD offers JSON-LD based interoperability used for Federations and Data Spaces. To run this tutorial with NGSI-LD, use the NGSI-LD branch.

git clone https://github.com/FIWARE/tutorials.Subscriptions.git
cd tutorials.Subscriptions
git checkout NGSI-LD

./services create
./services start

	📚 Documentation	Postman Collection

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License

MIT © 2018-2024 FIWARE Foundation e.V.

tutorials.subscriptions's Issues

services script removes all containers and volumes

services script calls stoppingContainers function which removes all containers and volumes in the machine where it's run, not only the ones from the tutorial.

Orion-ld crashes several times during the start of the example

Dear colleagues, when executing the "sudo ./service orion legacy" command, orion-ld serially exits with code 1. Obviously, the health check of the application is triggered. This can be understood from the following log.

Orion-ld must be restarted with "sudo docker start" many times before it returns a 200 code.

Subscription registration error

Dear developers, an attempt to execute the request given in README.md

leads to the following error

Orion-ld crashes when clicking the add button

Dear colleagues, pressing the add button in this application crashes orion-ld

Cannot delete subscriptions

Hi, following the tutorial it is impossible to delete a subscription, because Orion replies:

{"error":"BadRequest","description":"Orion accepts no payload for GET/DELETE requests. HTTP header Content-Type is thus
forbidden"}

This should be an error because it happens also without any header set, also using the correspondent collection in Postman kindly provided here. Thanks.