Implementation

This is the startUp method of XbookManagerPort. It references the registry (see Section 2.2.5) to find the name of the xbook engine which can handle the xbook request. The engine must be a subclass of Engine and is assumed to be in the same package as Engine, under xbooks.server.engine (we use the newInstance() method from the Class object to create a new engine instance; see the XbookManagerPort.java file).