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| <title>Apache Qpid Dispatch™: A Platform for Building AMQP Infrastructure</title> |
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| <h1>Apache Qpid Dispatch™</h1> |
| <h2>A Platform for Building AMQP Infrastructure</h2> |
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| <p>Qpid Dispatch is a library to help developers build infrastructure |
| components for AMQP. Dispatch is not a general-purpose Messaging API. |
| Rather, it is a foundation on which to build applications, services, and |
| appliances that need direct access to the detailed constructs of AMQP.</p> |
| <hr width="80%" /> |
| <h2>Overview</h2> |
| <p>Dispatch is an extension of the Engine and Driver interfaces of |
| <a href="http://qpid.apache.org/proton">Qpid Proton</a>. It neither |
| uses nor exposes the Messenger interface of Proton. Rather, it |
| provides a way for developers to use Proton's more detailed Engine |
| facility. The following features are provided:</p> |
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| <ul> |
| <li>An asynchronous, event-oriented application environment</li> |
| <li>Safe multi-threaded use of Proton</li> |
| <li>Operating System Signal handling</li> |
| <li>Quiesce and Resume for the application's threads</li> |
| <li>Timers</li> |
| <li>Resilient outbound connections (retry/reconnect)</li> |
| <li>Polling support for the application's non-AMQP file descriptors</li> |
| <li>An AMQP Node Container that allows the developer to create |
| custom node types</li> |
| </ul> |
| <p /> |
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| <h2>Architecture</h2> |
| <center><img src="images/arch.png" /></center> |
| <ul> |
| <li><b>Proton Engine and Driver</b> provide the underlying AMQP capability</li> |
| <li><a href="doxygen/server/modules.html">Dispatch Server</a> |
| wraps Proton connections in a multi-threaded server environment</li> |
| <li><b>Dispatch Container</b> provides management of AMQP nodes (links, termini, and deliveries)</li> |
| <li><b>Dispatch Message</b> provides efficient message encode/decode, optimized for messaging intermediaries</li> |
| <li>The <b>Application</b> uses all of the above services to implement scalable and performant AMQP infrastructure</li> |
| </ul> |
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