Migrate DID Finders to use Celery #32
Merged
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Problem
The ServiceX Microservice architecture relies on a combination of home-grown RabbitMQ code and REST APIs. This has shown reliability problems under periods of stress.
Approach
We will eventiually replace the microservice interactions with Celery to make the system entirely transactional. This PR represents the first step, replacing an exisiting RabbitMQ service with Celery.
The DID finders will continue to report files back to the ServuceX App via the REST interface, however the DID finders will now be Celery apps with a task called
lookup_dataset