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95 lines
3.8 KiB
HTML
95 lines
3.8 KiB
HTML
<html>
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<head>
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<title>Smack: Connection Management - Jive Software</title>
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<link rel="stylesheet" type="text/css" href="style.css"/>
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</head>
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<body>
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<div class="header">
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Smack: Connection Management
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</div>
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<div class="nav">
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« <a href="index.html">Table of Contents</a>
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</div>
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<p class="subheader">
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Creating a Connection
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</p>
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<p>
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The <tt>org.jivesoftware.smack.Connection</tt> class manages your connection to an XMPP
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server. The default implementation is the <tt>org.jivesoftware.smack.XMPPConnection</tt>
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class. Two constructors are mainly used. The first, <tt>XMPPConnection(String)</tt> takes
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the server name you'd like to connect to as an argument. All default connection settings will
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be used:
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<ul>
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<li>A DNS SRV lookup will be performed to find the exact address and port (typically 5222)
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that the server resides at.</li>
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<li>The maximum security possible will be negotiated with the server, including TLS encryption,
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but the connection will fall back to lower security settings if necessary.
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</li>
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<li>The XMPP resource name "Smack" will be used for the connection.</li>
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</ul>
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Alternatively, you can use the <tt>XMPPServer(ConnectionConfiguration)</tt> constructor to
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specify advanced connection settings. Some of these settings include:
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<ul>
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<li>Manually specify the server address and port of the server rather than using a DNS SRV
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lookup.</li>
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<li>Enable connection compression.</li>
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<li>Customize security settings, such as flagging the connection to require TLS encryption
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in order to connect.</li>
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<li>Specify a custom connection resource name such as "Work" or "Home". Every connection
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by a user to a server must have a unique resource name. For the user "jsmith@example.com", the
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full address with resource might be "jsmith@example.com/Smack". With unique resource names, a user
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can be logged into the server from multiple locations at once, or using multiple devices. The
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presence priority value used with each resource will determine which particular connection
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receives messages to the bare address ("jsmith@example.com" in our example).</li>
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</ul>
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</p>
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<p class="subheader">
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Connect and Disconnect
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</p>
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<div class="code">
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<pre>
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<font color="gray"><i>// Create the configuration for this new connection</i></font>
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ConnectionConfiguration config = new ConnectionConfiguration(<font color="green">"jabber.org"</font>, 5222);
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config.setCompressionEnabled(true);
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config.setSASLAuthenticationEnabled(true);
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Connection connection = new XMPPConnection(config);
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<font color="gray"><i>// Connect to the server</i></font>
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connection.connect();
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<font color="gray"><i>// Log into the server</i></font>
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connection.login(<font color="green">"username"</font>, <font color="green">"password"</font>, <font color="green">"SomeResource"</font>);
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....
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<font color="gray"><i>// Disconnect from the server</i></font>
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connection.disconnect();
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</pre></div>
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<p>
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By default Smack will try to reconnect the connection in case it was abruptly disconnected. Use
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<i>ConnectionConfiguration#setReconnectionAllowed(boolean) to turn on/off this feature. The reconnection
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manager will try to immediately reconnect to the server and increase the delay between attempts as
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successive reconnections keep failing.</i>
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<br>
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In case you want to force a reconnection while the reconnetion manager is waiting for the next
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reconnection, you can just use <i>Connection#connect()</i> and a new attempt will be made.
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If the manual attempt also failed then the reconnection manager will still continue the
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reconnection job.
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</p>
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<br clear="all"/><br><br>
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<div class="footer">
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Copyright © Jive Software 2002-2008
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</div>
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</body>
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</html>
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