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## Package org.jivesoftware.openfire.container

The microkernel core of the server is a simple, flexible, nested container framework defined in this package.

See:
Description

Interface Summary
Module | Logical, server-managed entities must implement this interface.
Plugin | Plugin interface.
PluginListener | Allows for notifications that a plugin has been either created or destroyed.
PluginManagerListener | Interface to listen for plugin manager events.

Class Summary
AdminConsolePlugin | The admin console plugin.
BasicModule | A default Module implementation that basically avoids subclasses having to implement the whole Module interface.
CacheInfo | Configuration to use when creating caches.
GetAdminConsoleInfoTask | Task that will return the bind interface and ports being used by the admin console of the node where the task will be executed.
IsPluginInstalledTask | Task that will be run in each cluster node to learn if the specified plugin is installed or not.
PluginCacheConfigurator | A helper class to read cache configuration data for a plugin and register the defined caches with the cache factory.
PluginCacheRegistry | A simple registry of cache configuration data for plugins.
PluginClassLoader | ClassLoader for plugins.
PluginDevEnvironment | Represents the data model used to represent development mode within the Jive Openfire plugin framework.
PluginIconServlet | Servlet is used for retrieval of plugin icons.
PluginManager | Loads and manages plugins.
PluginServlet | The plugin servlet acts as a proxy for web requests (in the admin console) to plugins.

Enum Summary
CacheInfo.Type |
PluginManager.License | An enumberation for plugin license agreement types.

## Package org.jivesoftware.openfire.container Description

The microkernel core of the server is a simple, flexible, nested container framework defined in this package.

The container model consists of three primary participants:

- Service - A well-known Java object defined by a Java interface. Code running in the server should be organized into services that perform logical (and limited) blocks of work. These services can then be exposed as a Java interface and obtained using the ServiceLookup service. Although most services will be local to the container, some may use RMI, web services, XMPP, or other remote procedure call technologies to provide services across the network.
- Module - The smallest server deployment unit. A module has a well-defined life cycle that is managed by its hosting container. A module may contain zero or more services and client code that accesses these services. Modules can be deployed and configured individually, allowing the easy implementation of server plugins and on the fly reconfiguration of the server.
- Container - A special module that hosts server modules including other containers. Hosting involves life cycle management of child modules, configuration of child modules, and providing access to shared resources. Containers also provide their own configurable security managers and custom classloaders that extend the classpath to automatically include module classes and jar files located in well defined locations (e.g. similar to WEB-INF/lib and WEB-INF/classes in a J2EE web-app/WAR).

The nesting nature of containers allows a tree-like server architecture with a root 'bootstrap container' with core modules, and child containers with their own modules. Child containers by default inherit and extend the bootstrap container's classpath and services while being protected from implementation details of any modules, containers, or services in layers above them. In some cases, child containers may have restricted views or access to upper levels of the tree (e.g. a user plug-in container that allows users to add arbitrary server extensions).

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