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03-add-persistence.md

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Make the counter persistent

As a: User
I need: the hit counter to persist the last known count
So that: I don't loose track of the count after the service is restarted

Assumptions:

  • We will use Redis as the persistent store
  • A Redis image from Docker should be used

Tasks:

  • Need to update the docker-compose.yml with Redis Docker image
  • Need to create a Model that uses Redis

Acceptance Criteria:

Given I have a persistent counter
When I advance the hit counter to 2
And I restart the hit counter service
And I call the hit /counter URL
Then I should see 3 returned from the service