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<title>44. 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 VII. Spring Cloud Bus"><link rel="prev" href="multi__bus_endpoints.html" title="43. Bus Endpoints"><link rel="next" href="multi__addressing_all_instances_of_a_service.html" title="45. 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">44. Addressing an Instance</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="multi__bus_endpoints.html">Prev</a> </td><th width="60%" align="center">Part VII. 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>44. Addressing an Instance</h2></div></div></div><p>Each instance of the application has a service ID, whose value can be set with
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<code class="literal">spring.cloud.bus.id</code> and whose value is expected to be a colon-separated list of
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identifiers, in order from least specific to most specific. The default value is
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constructed from the environment as a combination of the <code class="literal">spring.application.name</code> and
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<code class="literal">server.port</code> (or <code class="literal">spring.application.index</code>, if set). The default value of the ID is
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constructed in the form of <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,
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<code class="literal">spring.application.index</code>, <code class="literal">local.server.port</code>, <code class="literal">server.port</code>, or <code class="literal">0</code> (in that order).</li><li class="listitem"><code class="literal">id</code> is the <code class="literal">vcap.application.instance_id</code>, if it exists, or a random value.</li></ul></div><p>The HTTP endpoints accept a “destination” path parameter, such as
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<code class="literal">/bus-refresh/customers:9000</code>, where <code class="literal">destination</code> is a service ID. If the ID
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is owned by an instance on the bus, it processes the message, and all other instances
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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__bus_endpoints.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">43. Bus Endpoints </td><td width="20%" align="center"><a accesskey="h" href="multi_spring-cloud.html">Home</a></td><td width="40%" align="right" valign="top"> 45. Addressing All Instances of a Service</td></tr></table></div></body></html> |