This example demonstrates a simple Calculator application that is composed of POJO services for each calculator function (add, subtract, multiply and divide).
Each calculator function is a deployable service, and the Calculator has a declared association to each service. The Calculator service becomes 'whole' when it discovers it's required services. The Calculator is a good example on the use of associations and how association based dependency injection can be used.
The Calculator example is a multi-module Maven project, with the following structure (just inter-project dependencies are shown):
The example produces the following artifacts:
| Artifact | Description |
| calculator-service-2.0.jar | Artifact containing service implementation classes |
| calculator-api-2.0.jar | Artifact containing classes required for a client to invoke methods on each of the calculator services |
| calculator-2.0.oar | The OperationalString archive, contains the configuration artifacts used to deploy the Calculator application |
Running mvn install will result in the execution of integration tests that use the Rio test infrastructure
Look here for information on running the example
The example also provides a test client that uses the Rio test infrastructure to create and invoke methods on the Calculator service.