CA AppLogic® catalogs are an easy way to package multiple appliance classes into a library. A catalog can be used in multiple applications, or it may contain appliances that are used in a single large application.
Each appliance class consists of a class descriptor and one or more class volume images referenced by that descriptor. Each assembly class consists of a class descriptor similar to the class descriptor of the regular appliance classes, and an interior descriptor that captures the structure inside the assembly.
A CA AppLogic® catalog consists of a catalog descriptor that lists all classes included in the catalog, and a set of class descriptors. Each class descriptor, in turn, refers to one or more class volumes or interior descriptors. In the current release of CA AppLogic®, catalogs are implemented as shared directories, in which all descriptors reside. The associated volumes may reside in the same directory (as volume image files), or in the CA AppLogic® volume store.
Tip: Placing the volume images in files makes it easy to publish a catalog through a web or ftp interface.
The name of a class included in a catalog is unique within the catalog. When a class makes a reference to another class contained within the same catalog, the name of that class is sufficient to resolve the reference. Whenever a class has a reference to a class from another catalog, the name of the catalog is pre-pended to the name of the class to form a name that is unique within the CA AppLogic® class namespace.
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