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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>4.&nbsp;Introducing Spring Cloud Stream</title><link rel="stylesheet" type="text/css" href="css/manual-multipage.css"><meta name="generator" content="DocBook XSL Stylesheets V1.79.1"><link rel="home" href="multi_spring-cloud-stream.html" title="Spring Cloud Stream Reference Guide"><link rel="up" href="multi__reference_guide.html" title="Part&nbsp;II.&nbsp;Reference Guide"><link rel="prev" href="multi__reference_guide.html" title="Part&nbsp;II.&nbsp;Reference Guide"><link rel="next" href="multi__main_concepts.html" title="5.&nbsp;Main Concepts"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">4.&nbsp;Introducing Spring Cloud Stream</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="multi__reference_guide.html">Prev</a>&nbsp;</td><th width="60%" align="center">Part&nbsp;II.&nbsp;Reference Guide</th><td width="20%" align="right">&nbsp;<a accesskey="n" href="multi__main_concepts.html">Next</a></td></tr></table><hr></div><div class="chapter"><div class="titlepage"><div><div><h2 class="title"><a name="spring-cloud-stream-overview-introducing" href="#spring-cloud-stream-overview-introducing"></a>4.&nbsp;Introducing Spring Cloud Stream</h2></div></div></div><p>Spring Cloud Stream is a framework for building message-driven microservice applications.
<title>4.&nbsp;Introducing Spring Cloud Stream</title><link rel="stylesheet" type="text/css" href="css/manual-multipage.css"><meta name="generator" content="DocBook XSL Stylesheets V1.79.1"><link rel="home" href="multi_spring-cloud-stream.html" title="Spring Cloud Stream Reference Guide"><link rel="up" href="multi__preface.html" title="Part&nbsp;I.&nbsp;Preface"><link rel="prev" href="multi__whats_new_in_2_0.html" title="3.&nbsp;What&#8217;s New in 2.0?"><link rel="next" href="multi__main_concepts.html" title="5.&nbsp;Main Concepts"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">4.&nbsp;Introducing Spring Cloud Stream</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="multi__whats_new_in_2_0.html">Prev</a>&nbsp;</td><th width="60%" align="center">Part&nbsp;I.&nbsp;Preface</th><td width="20%" align="right">&nbsp;<a accesskey="n" href="multi__main_concepts.html">Next</a></td></tr></table><hr></div><div class="chapter"><div class="titlepage"><div><div><h2 class="title"><a name="spring-cloud-stream-overview-introducing" href="#spring-cloud-stream-overview-introducing"></a>4.&nbsp;Introducing Spring Cloud Stream</h2></div></div></div><p>Spring Cloud Stream is a framework for building message-driven microservice applications.
Spring Cloud Stream builds upon Spring Boot to create standalone, production-grade Spring applications and uses Spring Integration to provide connectivity to message brokers.
It provides opinionated configuration of middleware from several vendors, introducing the concepts of persistent publish-subscribe semantics, consumer groups, and partitions.</p><p>You can add the <code class="literal">@EnableBinding</code> annotation to your application to get immediate connectivity to a message broker, and you can add <code class="literal">@StreamListener</code> to a method to cause it to receive events for stream processing.
The following example shows a sink application that receives external messages:</p><pre class="programlisting"><em><span class="hl-annotation" style="color: gray">@SpringBootApplication</span></em>
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<span xmlns:d="http://docbook.org/ns/docbook" class="hl-keyword">public</span> <span xmlns:d="http://docbook.org/ns/docbook" class="hl-keyword">void</span> contextLoads() {
assertNotNull(<span xmlns:d="http://docbook.org/ns/docbook" class="hl-keyword">this</span>.sink.input());
}
}</pre></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="multi__reference_guide.html">Prev</a>&nbsp;</td><td width="20%" align="center"><a accesskey="u" href="multi__reference_guide.html">Up</a></td><td width="40%" align="right">&nbsp;<a accesskey="n" href="multi__main_concepts.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Part&nbsp;II.&nbsp;Reference Guide&nbsp;</td><td width="20%" align="center"><a accesskey="h" href="multi_spring-cloud-stream.html">Home</a></td><td width="40%" align="right" valign="top">&nbsp;5.&nbsp;Main Concepts</td></tr></table></div></body></html>
}</pre></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="multi__whats_new_in_2_0.html">Prev</a>&nbsp;</td><td width="20%" align="center"><a accesskey="u" href="multi__preface.html">Up</a></td><td width="40%" align="right">&nbsp;<a accesskey="n" href="multi__main_concepts.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">3.&nbsp;What&#8217;s New in 2.0?&nbsp;</td><td width="20%" align="center"><a accesskey="h" href="multi_spring-cloud-stream.html">Home</a></td><td width="40%" align="right" valign="top">&nbsp;5.&nbsp;Main Concepts</td></tr></table></div></body></html>