primechecker-azure-java

An Azure Function implemented in Java for checking whether or not a number is prime.

Build status

• Dynamic
  
• Structural
  
• Other
  

Learning objectives

• Show how CPU-intensive computation can be off-loaded from a mobile app to the cloud, by comparison to a mobile device, an unlimited resource for computation and storage.

• End-to-end example of continuous integration (CI), continuous deployment/delivery (CD), and DevOps in Java using Azure Functions.

See also the corresponding mobile app.

How to use

To use, put the number to be checked in the query string of the deployed function, e.g.

https://primechecker.azurewebsites.net/api/isPrime?number=7

Some sample primes to try

• 1013
• 10007
• 100003
• 1000003
• 10000169
• 100000007
• 1000000000169
• 100000000000169

Some non-primes to try

• 999989
• Long.MAX_VALUE
• 10000000000000000169
• 2 * Long.MAX_VALUE + 3

Development

Prerequisites

See Quickstart: Create a Java function in Azure from the command line.

Building and testing locally

Test with

$ mvn test

Run locally with

$ mvn azure-functions:run

and use via the provided local URLs.

Managing via the Azure portal

Visit the Function App section of the Azure portal.

A function app can have one or more functions. Drill into a specific function:

Home > Function App > primechecker > isPrime

In it's Code + Test section, you can verify the mapping between the function's published entry point and the corresponding method implementation:

"entryPoint": "edu.luc.cs.cs371.primechecker.web.PrimeCheckerFunction.run",

There, you can press the Test/Run button to interact directly with the function:

References

• Jason Christensen's OOPSLA 2009 presentation
• James Earl Douglas's SBTB 2014 presentation
• Quickstart: Create a Java function in Azure from the command line