Issue - Thread Safety

[SeanKilleen]

Originally from https://github.com/excellaco/azure-sentiment-analysis/issues/1

Issue

The current handling of tweets is not thread-safe. In cases of high loads, there is a case where we may experience a sentiment score being incorrectly associated with a tweet.

Solution

A solution would be to encapsulate the logic for calling a cognitive service and the eventhub in a dedicated Azure Function (maybe a Durable Function?). Hence the Azure WebJob will solely focus on streaming data

Another solution would be to add an Azure Storage Queue that recieves input for each new event, with worker role picking up messages from the queue and sending them to the Azure EventHub