4.4.1. Services
Services form the layer that defines a set of Middleware operations available to the client tier. Services encapsulate business logic and transaction management.
The main objectives of services:
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Provide the remote interface to call from the client tier.
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Check the availability of the active user session, that corresponds to the session identifier transferred from the client.
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Log unhandled middleware exceptions.
In addition, it is recommended to perform user authorization in the service layer, i.e. to check their rights for a particular functionality.
The objectives common to all services are handled as follows:
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Checking the availability of the user session and logging exceptions are performed by the
ServiceInterceptor, class which intercepts the execution of each service method using Spring AOP. -
The remote interface to access the service through Spring HTTP Invoker is created by the
RemoteServicesBeanCreator, bean, which is configured in the remoting-spring.xml file of the core module.
