I want to create a web app using OpenStack which will collect data from virtual sensors(programs that will generate dummy data) and then I will provide users operations on that data and i want to bill them accordingly. I know about the Openstack components like Keystone, Nova, Glance but I don't know how to utilize them in a Web app and how to use it there. I installed devstack on my system and found out a java library: OpenStack4j to interact with the openstack. But the problem is that I don't know how to use Openstack components for implementing the different functionalities of my app. e.g: For Logging into my Web App I will use Keystone, For making and storing my virtual sensors I will make programs and store then in X component, For billing I will use Y component to read the amount of data fetched from DB. Also, is Amazon AWS simpler if I want to do the same thing there?
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Your best bet is to read through the Writing Your First OpenStack Application. That guide is in Python as there isn't a version in Java yet. Nonetheless, I think it would help you a lot to read through it and think about how you would do similar things with a Java OpenStack SDK of your choice, like OpenStack4j or jclouds.
