Group Chat Invitations ====================== The group chat invitation extension is used to invite other users to a group chat room. * Inviting Other Users * Listen for Invitations **XEP related:** N/A -- this protocol is outdated now that the Multi-User Chat (MUC) XEP is available ([XEP-45](http://www.xmpp.org/extensions/xep-0045.html)). However, most existing clients still use this older protocol. Once MUC support becomes more widespread, this API may be deprecated. Inviting Other Users -------------------- To use the GroupChatInvitation packet extension to invite another user to a group chat room, address a new message to the user and set the room name appropriately, as in the following code example: ``` Message message = new Message("user@chat.example.com"); message.setBody("Join me for a group chat!"); message.addExtension(new GroupChatInvitation("room@chat.example.com")); con.sendStanza(message); ``` The XML generated for the invitation portion of the code above would be: ``` ``` Listening for Invitations ------------------------- To listen for group chat invitations, use a StanzaExtensionFilter for the `x` element name and `jabber:x:conference` namespace, as in the following code example: ``` StanzaFilter filter = new StanzaExtensionFilter("x", "jabber:x:conference"); // Create a packet collector or packet listeners using the filter... ```