Package com.epicentric.services

Provides a flexible, standard means of specifying system features or resources that are configurable at run time.

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Package Summary

Interface Summary

ConfigurationMigrator	This is an interface that custom migrators must implement.
ConfigurationValidator	This is an interface that custom validators must implement.
Controllable
Service	Deprecated. in 4.0, to be removed in 8.0 or later.
ServiceController

Class Summary

AbstractControllable
AbstractServiceController
GenericService	Deprecated. in 4.0, to be removed in 8.0 or later.
IndexedPropertySet
Property
PropertySet
ServiceConfig	Deprecated. in 4.0, to be removed in 8.0 or later.
ServiceConfiguration
ServiceManager	Framework providing a consistent interface to plug-in services.
ServiceProperty
ValueProperty

Exception Summary

ServiceException
ServiceUnavailableException

Package com.epicentric.services Description

Provides a flexible, standard means of specifying system features or resources that are configurable at run time. New services can be substituted into a system without any source code modification. A graphical user interface enables substituting one service implementation for another.

A service is a "black box" -- an abstract placeholder for some functionality. The details of its implementation are unknown, and unimportant, to the user of the service. Services can share a caching scheme, coordinate timing events among multiple objects, or centralize any other resources. Examples of Vignette Portal services are the MetaStore and a discussion board service.

The Vignette Portal services system supports the following features:

• Multiple implementations of the same type of service, with optional designation of one implementation as the default for its type
• Optional pre-configuration through a definition (XML) file
• Database persistence of service configurations, thereby supporting clustered environments and upgrades
• Optional delegation of configuration, startup, stopping, restarting, and other service control functions to the service manager
• Access to service manager functionality through the Vignette Portal administration console
• Ability to import and export services using the Vignette Portal deployment API

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Discussion