Building a bank one service at a time

This session is aimed at teaching you the basics of Spring Boot and how we can use a few basic concepts to show how a service oriented architecture can work. We ask for you to work in pairs to build out the service using a test driven approach.

Rule #1: you cannot write any production code without a failing test (think of the compiler as a test).
Rule #2: you are not allowed to use your mouse, intellij was designed ergonomically
Rule #3: do this in pairs
Rule #4: once you have finished in the led session, delete it and do it again at your own pace.

Prerequisites

You will need Java and an IDE (we prefer Intellij IDEA).

The project uses Gradle, you will either need to work with Gradle from the terminal or, in the case of IntelliJ IDEA, use the Gradle plugin.

As we use Gradle, performing the steps below before the session will save time downloading various dependencies.

Clone the repository with the following command.

$$ git clone https://github.com/suggitpe/spring-boot-kata.git

If you have problems with SSL, you can try the following.

$$ git clone -c http.sslVerify=false https://github.com/suggitpe/spring-boot-kata.git

If you have problems with a proxy, you can unset http_proxy and unset https_proxy (or equivalent for your OS).

Open the project from IntelliJ IDEA (community edition is fine).

If you have the Gradle plugin installed, things should "just work". Gradle will download all the dependencies and you will see the project compile. Your millage may vary.
To test everything is compiling, navigate to DiscoveryService.java (under the discovery-service folder) and run it as an application.

You should see a green run icon to the left of the class declaration. If you don't or can't run it, speak to an instructor.

Instructions

This kata is structured a set of weekly exercises that are instructor led:

Week 1 creating an application and adding a single put service
Week 2 creating a repository and adding gets into the service
Week 3 using the discovery service to call another restful application
Week 4 securing the services

... more to come

Homework

As with all learning there will be a small amount of homework for you to take away. We want to build a new solution outside of the katas where you will build a new HR system for the company. We will start small and grow big, just like this project. You may want to consider creating a GitHub account to house this. Each week after the session we want you to do the following:

Delete everything you did in the kata and do it again
Complete the homework assignment we give you at the bottom of the kata.

If you get stuck, please reach out to one of the instructors to ask for help.

Additionally

You may also want to spend a few moments watching some of the Josh Long videos below: