Prerequisites for Listener Implementations

10-2 Oracle WebLogic Server SIP Container Developers Guide ■ Creating new documents. ■ Querying and updating existing documents. ■ Deleting documents. ■ Managing subscriptions for receiving notifications of profile document changes. Clients that want to use a profile provider obtain a profile service instance through a Servlet context attribute. They then construct an appropriate URL and use that URL with one of the available Profile Service API methods to work with profile data. The contents of the URL, combined with the configuration of profile providers, determines the provider implementation that WebLogic Server to process the clients requests. The sections that follow describe how to implement the profile service API interfaces in a custom profile provider.

10.2 Implementing Profile Service API Methods

A custom profile provider is implemented as a shared Java EE library typically a simple JAR file deployed to the engine tier cluster. The provider JAR file must include, at minimum, a class that implements com.bea.wcp.profile.ProfileServiceSpi. This interface inherits methods from com.bea.wcp.profile.ProfileService and defines new methods that are called during provider registration and unregistration. In addition to the provider implementation, you must implement the com.bea.wcp.profile.ProfileSubscription interface if your provider supports subscription-based notification of profile data updates. A ProfileSubscription is returned to the client subscriber when the profile document is modified. The Oracle Fusion Middleware WebLogic Server API Reference describes each method of the profile service API in detail. Also keep in mind the following notes and best practices when implementing the profile service interfaces: ■ The putDocument, getDocument, and deleteDocument methods each have two distinct method signatures. The basic version of a method passes only the document selector on which to operate. The alternate method signature also passes the address of the sender of the request for protocols that require explicit information about the requestor. ■ The subscribe method has multiple method signatures to allow passing the senders address, as well as for supporting time-based subscriptions. ■ If you do not want to implement a method in com.bea.wcp.profile.ProfileServiceSpi, include a no-op method implementation that throws the OperationNotSupportedException. com.bea.wcp.profile.ProfileServiceSpi defines provider methods that are called during registration and unregistration. Providers can create connections to data stores or perform any required initializing in the register method. The register method also supplies a ProviderBean instance, which includes any context parameters configured in the providers configuration elements in profile.xml. Providers must release any backing store connections, and clean up any state that they maintain, in the unregister method.