This is a small demo application for the Hystrix library from Netflix. It's all about resiliency in distributed systems, so this is kind of a simple and naive e-commerce microservices application.

The Spring Boot based demo application consists of a frontend webapp that integrates five business services to form a small e-commerce application. The services expose an REST interface, Apache's HttpClient is used for communication. All business services use in memory storage for the sake of simplicity.

The application consists of the following business services, implemented as Maven modules:

• frontend: provides an integrated frontend the services
• auth: provides authentication and user management
• cart: creation and management of shopping carts
• catalog: product catalog
• order: processes and archives orders
• stock: provides an inventory system to return the stock count for items in the catalog

There are also some modules related to configuration and the more technical things:

• service-urls: configures the addresses and ports under which the (business) services will run
• util: utility classes

And finally some modules for testing:

• acceptance-tests: a small set of user acceptance tests using the small and fine JGiven
• load-generator: generates load to simulate user traffic

The whole project can be built via Maven:

$ mvn clean install

To run the acceptance test suite, change to the acceptance-tests folder and run

$ mvn verify

The reports will then be placed under target/jgiven-reports.

All the business services can be run as standalone apps. Before you run them, make sure to create your local services configuration:

$ cp service-urls/src/main/resources/config/application.properties.default service-urls/src/main/resources/config/application.properties

Then adjust the newly created application.properties file according to your environment in case you get any port conflicts (hint: you shouldn't have to).

The user acceptance tests can be run like JUnit tests. The load generator is a standalone java application and is also run most conveniently from within your IDE.

This is a demo application - don't use it in production (I know it's tempting...).