Service Method Invocation
Server Subsystem Use Cases
Server Subsystem Use Cases
  Contents

PDF version   PostScript version

Initialisation of the Server Subsystem

The server module initialisation is launched by the application server--whenever the latter is explicitly started. The service deployment takes place at this time, and three elements must be defined for each service: the service name, the service interface and a servant.
The service name is a Uniform Resource Identifier (URI), as define in the SOAP specifications (Box et al., 2000).
The service interface defines the method name, the parameter type and the parameter passing modes--the parameter names are not important but the order of parameters is (see ibid.). Each service interface must extend the XbService marker interface. The reader is directed to (Arnold & Gosling, 1998) for a definition of marker interfaces.
The servant is a delegate JavaBean that is reponsible for invoking the EJBs that actually implement the service. In very simple cases, the delegate may implement the service itself.