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<title>39. Addressing an Instance</title><link rel="stylesheet" type="text/css" href="css/manual-multipage.css"><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="multi_spring-cloud.html" title="Spring Cloud"><link rel="up" href="multi__spring_cloud_bus.html" title="Part VI. Spring Cloud Bus"><link rel="prev" href="multi__quick_start_2.html" title="38. Quick Start"><link rel="next" href="multi__addressing_all_instances_of_a_service.html" title="40. Addressing all instances of a service"></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">39. Addressing an Instance</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="multi__quick_start_2.html">Prev</a> </td><th width="60%" align="center">Part VI. Spring Cloud Bus</th><td width="20%" align="right"> <a accesskey="n" href="multi__addressing_all_instances_of_a_service.html">Next</a></td></tr></table><hr></div><div class="chapter"><div class="titlepage"><div><div><h2 class="title"><a name="_addressing_an_instance" href="#_addressing_an_instance"></a>39. Addressing an Instance</h2></div></div></div><p>Each instance of the application has a service ID, whose value can be set using <code class="literal">spring.cloud.bus.id</code>, and whose value is expected to be a colon-separated list of identifiers, in order of least specific to most specific. The default value is constructed from the environment as a combination of the <code class="literal">spring.application.name</code> and <code class="literal">server.port</code> (or <code class="literal">spring.application.index</code> if set). The default value of the ID is constructed in the form <code class="literal">app:index:id</code> where:</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><code class="literal">app</code> is the <code class="literal">vcap.application.name</code> if it exists, or <code class="literal">spring.application.name</code></li><li class="listitem"><code class="literal">index</code> is the <code class="literal">vcap.application.instance_index</code> if it exists, or else <code class="literal">spring.application.index</code>, or else <code class="literal">local.server.port</code> (or <code class="literal">server.port</code> or <code class="literal">0</code>).</li><li class="listitem"><code class="literal">id</code> is the <code class="literal">vcap.application.instance_id</code> if it exists, or else a random value.</li></ul></div><p>The HTTP endpoints accept a "destination" parameter, e.g. "/bus/refresh?destination=customers:9000", where the destination is a service ID. If the ID is owned by an instance on the Bus then it will process the message and all other instances will ignore it.</p></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="multi__quick_start_2.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="multi__spring_cloud_bus.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="multi__addressing_all_instances_of_a_service.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">38. Quick Start </td><td width="20%" align="center"><a accesskey="h" href="multi_spring-cloud.html">Home</a></td><td width="40%" align="right" valign="top"> 40. Addressing all instances of a service</td></tr></table></div></body></html> |