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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.

Building the example

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

Running the example

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.

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Version: 5.6.6. Last Published: 2018-10-25.