Plugin description

The Service Registry Plugin consists of the following components:

ServiceResolver - resolves information about the service endpoints for specified service using endpoint document providers and endpoint extractors
EndpointDocumentProvider - is responsible for retrieval of service description from different kinds of location. Different implementation of the EndpointDocumentProvider can be used to get the service descriptions from local filesystem or from a remote registry.
EndpointExtractor - extracts endpoint parts (e.g. endpoint address, transport protocol) from the service description representation. At the same time multiple endpoint extractors can be registered in the system, each suitable for processing one type of service description document (e.g. extractor for WSDL 1.1 based service descriptions, extractor for WSDL 2.0 and so on).

The endpoint resolution process is described by the folowing scenario:

ServiceResolver gets all EndpointDocumentProviders registered at runtime and chooses one with the highest priority. The chosen provider is then queried for service description documents corresponding to the specified service interface. All found documents are returned from provider as collection of the ServiceDescription objects where each ServiceDescription represents one raw description document.
ServiceResolver gets all registered EndpointExtractors and uses them to extract endpoint description information from received ServiceDescriptions. At this step it also performs policy trading which allows to exclude non-matching service descriptions from the extraction process. Extracted endpoint descriptions are grouped as collection of EndpointDescription objects and returned to caller.

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