Smack/documentation/overview.md

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Smack Overview
==============
[Back](index.md)
Smack is a library for communicating with XMPP servers to perform real-time
communications, including instant messaging and group chat.
Smack Key Advantages
--------------------
* Extremely simple to use, yet powerful API. Sending a text message to a user can be accomplished in only a few lines of code:
```java
AbstractXMPPConnection connection = new XMPPTCPConnection("mtucker", "password", "jabber.org");
connection.connect().login();
Chat chat = ChatManager.getInstanceFor(connection)
.createChat("jsmith@jivesoftware.com", new MessageListener() {
public void processMessage(Chat chat, Message message) {
System.out.println("Received message: " + message);
}
});
chat.sendMessage("Howdy!");
```
* Doesn't force you to code at the packet level, as other libraries do. Smack provides intelligent higher level constructs such as the `Chat` and `Roster` classes, which let you program more efficiently.
* Does not require that you're familiar with the XMPP XML format, or even that you're familiar with XML.
* Provides easy machine to machine communication. Smack lets you set any number of properties on each message, including properties that are Java objects.
* Open Source under the Apache License, which means you can incorporate Smack into your commercial or non-commercial applications.
About XMPP
----------
XMPP (eXtensible Messaging and Presence Protocol) is an open protocol
standardized by the IETF and supported and extended by the XMPP Standards
Foundation (([http://www.xmpp.org](http://www.xmpp.org)).
How To Use This Documentation
-----------------------------
This documentation assumes that you're already familiar with the main features
of XMPP instant messaging. It's also highly recommended that you open the
Javadoc API guide and use that as a reference while reading through this
documentation.
Copyright (C) Jive Software 2002-2008