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diff --git a/content/xdocs/Qpid Design - Application Registry.html b/content/xdocs/Qpid Design - Application Registry.html new file mode 100755 index 0000000000..56cf5a2062 --- /dev/null +++ b/content/xdocs/Qpid Design - Application Registry.html @@ -0,0 +1,52 @@ +<html> + <head> + <title>Apache Qpid : Qpid Design - Application Registry</title> + <link rel="stylesheet" href="styles/site.css" type="text/css" /> + <META http-equiv="Content-Type" content="text/html; charset=UTF-8"> + </head> + + <body> + <table class="pagecontent" border="0" cellpadding="0" cellspacing="0" width="100%" bgcolor="#ffffff"> + <tr> + <td valign="top" class="pagebody"> + <div class="pageheader"> + <span class="pagetitle"> + Apache Qpid : Qpid Design - Application Registry + </span> + </div> + <div class="pagesubheading"> + This page last changed on Oct 19, 2006 by <font color="#0050B2">rgreig</font>. + </div> + + <p>The Application Registry is a more sophisticated version of the widely used singleton pattern. It allows the registration of services with a central component that manages the lifecycle of those services.</p> + +<h4><a name="QpidDesign-ApplicationRegistry-IApplicationRegistry"></a>IApplicationRegistry</h4> + +<p>The interface <tt>IApplicationRegistry</tt> provides accessors for the following:</p> +<ul> + <li><a href="Qpid Design - Configuration.html#QpidDesign-Configuration-ConfiguredObjects" title="ConfiguredObjects on Qpid Design - Configuration">Configured Objects</a></li> + <li>the raw <a href="Qpid Design - Configuration.html#QpidDesign-Configuration-Configuration" title="Configuration on Qpid Design - Configuration">Configuration</a></li> + <li>various services such as the queue registry and exchange registry</li> +</ul> + + +<h4><a name="QpidDesign-ApplicationRegistry-ApplicationRegistry"></a>ApplicationRegistry</h4> + +<p>The abstract class <tt>ApplicationRegistry</tt> is a partial implementation of <tt>IApplicationRegistry</tt> that provides an implementation of the configured object cache as well as providing singleton access to the concrete application registry.</p> + +<p>Subclasses should instantiate the appropriate services in order to provide access to them. Initialisation of these must be done in the <tt>initialise</tt> method so that those services can use the <tt>ApplicationRegistry</tt> themselves - attempting to initialise services in the constructor can result in <tt>NullPointerExceptions</tt> if they use the registry.</p> + + + </td> + </tr> + </table> + <table border="0" cellpadding="0" cellspacing="0" width="100%"> + <tr> + <td height="12" background="border/border_bottom.gif"><img src="border/spacer.gif" width="1" height="1" border="0"/></td> + </tr> + <tr> + <td align="center"><font color="grey">Document generated by Confluence on Apr 22, 2008 02:47</font></td> + </tr> + </table> + </body> +</html>
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