What is the life cycle of a Descriptor?
When a Descriptor is first invoked, the Descriptor code retrieves the Descriptor from its URL and creates a java object representing that Descriptor. For the first invocation only, the XSL transformer processes the XSL stylesheet into an internal form and places it in a free pool for use. When used, it is placed in a busy pool until it has performed its duty, then returned to the free pool. If a client requests a Descriptor and an instance is already in the busy pool, a new instance is created and made available. Eventually, both Descriptors are returned to the free pool. The pool grows to the size needed and stays that size. It is not expected that these pools will get very large, especially in comparison to resources on a Mulgara server.
