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| Every module implements a small portion of the core XMPP spec or one of its extensions. |
| These implementations come in the shape of {@link org.apache.vysper.xmpp.protocol.StanzaHandler}s where a module |
| contains all handlers for one (or two) XMPP namespaces. In addition to handlers, a module covers all the |
| backend functionality needed for the implementation and publishes services (via {@link org.apache.vysper.xmpp.modules.ServerRuntimeContextService}) |
| to be used by others. |
| <p/> |
| Many XMPP extensions link into service discovery (XEP-0030). Those modules extend {@link org.apache.vysper.xmpp.modules.DefaultDiscoAwareModule}. |
| <p/> |
| The roster module ({@link org.apache.vysper.xmpp.modules.roster})is a simple example. |
| It installs the {@link org.apache.vysper.xmpp.modules.roster.RosterDictionary}, which registers |
| {@link org.apache.vysper.xmpp.modules.roster.handler.RosterIQHandler} for the "jabber:iq:roster" namespace. Additionally, it |
| publishes a {@link org.apache.vysper.xmpp.modules.roster.persistence.RosterManager} implementation, responsible for storing and retrieving |
| a user's roster. The RosterManager service, which can be accessed through {@link org.apache.vysper.xmpp.server.ServerRuntimeContext#getServerRuntimeContextService}, |
| is also used by the {@link org.apache.vysper.xmpp.modules.core.im.handler.PresenceHandler}. |
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