Ions Tutorial

If you wish to delete your Datomic Cloud system after you've deployed an Ion, then you must first deploy an Ion with an resources/datomic/ion-config.edn that consists of a map of the :app-name of your application.

Change your resources/datomic/ion-config.edn to the following map, and replace :app-name with your application name.

{:app-name "app-name"}

Now push and deploy.

Once this ion-config.edn is deployed, the Datomic Cloud system can be deleted.

In this tutorial, you have seen how ions can take ordinary Clojure functions, and install them in Datomic Cloud where they have in-memory access to Datomic data. You have used ions to deliver:

• a data-driven application via AWS Lambda
• attribute predicates
• a web service via API Gateway

There is a lot more to explore! Here are some things to try:

• Use ions to implement a lambda that handles events from other AWS services. See the ion-event-example project.
• Instead of wiring a web handler to a single function, use a routing library such as Compojure or pedestal.
• Learn to Authenticate with Cognito