This is my implementation of Matteo Vaccari's Hexagonal Kata, otherwise known as the birthday greetings kata. I welcome any feedback you may have!
For an overview of how the system works, look at the end-to-end test in the test/endtoend folder, see the class
test.endtoend.birthdaygreetings.BirthdayGreetingsEndToEndTest.
To start exploring the production code, look at the entry point Main in src/main/java at the class
com.danielwellman.birthdaygreetings.Main. This class wires all the dependencies together and launches the
application. Most of the action takes place in BirthdayService#sendGreetings.
- Java 7
- IntelliJ to load the project .iml and test run configuration
I built and tested this project in IntelliJ 12, use the included .iml and the "All Tests" run configuration to run. I haven't yet created a build script since I did everything in IntelliJ for now.
Note that I specifically chose not to use Guava's collections and predicate library for this exercise, attempting to see how the Guava team's advice plays out:
Excessive use of Guava's functional programming idioms can lead to verbose, confusing, unreadable, and inefficient code. These are by far the most easily (and most commonly) abused parts of Guava, and when you go to preposterous lengths to make your code "a one-liner," the Guava team weeps.
Some bits in the InMemoryPersonRegistry and PeopleSource might benefit from some of the collections and
predicate operations, in retrospect.