tigase.component.modules

## Interface Module

- All Known Implementing Classes:
    AbstractEventBusModule, AbstractModule, AbstractModule, AdHocCommandModule, AdHocCommandMonitorModule, DepartQueueModule, DiscoveryModule, DiscoveryModule, DiscoveryMonitorModule, EventbusDiscoveryModule, EventPublisherModule, EventReceiverModule, ExternalServiceDiscoveryModule, GetFormModule, JabberVersionModule, JoinQueueModule, MucControllerModule, OfferModule, PresenceModule, QueryModule, QueueStatusModule, StatusModule, SubscribeModule, TestGeneratorModule, TestSpamModule, UnsubscribeModule, XmppPingModule

      public interface Module

  Basic interface to implement component module. Single module should implement fragment of component logic. Is easy to add or remove in component (Server) configuration.
  Author:
    bmalkow

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static String[]` | `EMPTY_FEATURES`

  - ### Method Summary

    All Methods Instance Methods Abstract Methods Default Methods
    Modifier and Type | Method and Description
    --- | ---
    `default boolean` | `canHandle(Packet packet)` Returns true if Packet can be procesed by module.
    `default String[]` | `getFeatures()` Returns XMPP features offered by module.
    `Criteria` | `getModuleCriteria()` Returns critera used by Component to select module to handle incoming stanza.
    `void` | `process(Packet packet)` Process incoming stanza.

- - ### Field Detail

    - #### EMPTY_FEATURES

          static final String[] EMPTY_FEATURES

  - ### Method Detail

    - #### getFeatures

          default String[] getFeatures()

      Returns XMPP features offered by module. Features will be returned by Service Discovery.
      Returns:
        array of features or `null`.

    - #### getModuleCriteria

          Criteria getModuleCriteria()

      Returns critera used by Component to select module to handle incoming stanza.
      Returns:
        criteria of selecting module.

    - #### canHandle

          default boolean canHandle(Packet packet)

      Returns true if Packet can be procesed by module. Default implementation uses Criteria.

    - #### process

          void process(Packet packet)
                throws ComponentException,
                       TigaseStringprepException

      Process incoming stanza.
      Parameters:
        `packet` - received `stanza`.
      Throws:
        `ComponentException` - if stanza can't be processed correctly. ComponentException is converted to error stanza and returned to stanza sender.
        `TigaseStringprepException` - if there was an error during stringprep processing.

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