38 lines
2.7 KiB
XML
38 lines
2.7 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!-- ============================================================================= -->
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<!-- Copyright © 2009 Red Hat, Inc. and others. -->
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<!-- -->
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<!-- The text of and illustrations in this document are licensed by Red Hat under -->
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<!-- a Creative Commons Attribution–Share Alike 3.0 Unported license ("CC-BY-SA"). -->
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<!-- -->
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<!-- http://creativecommons.org/licenses/by-sa/3.0/. -->
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<!-- -->
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<!-- In accordance with CC-BY-SA, if you distribute this document or an adaptation -->
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<!-- of it, you must provide the URL for the original version. -->
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<!-- Red Hat, as the licensor of this document, waives the right to enforce, -->
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<!-- and agrees not to assert, Section 4d of CC-BY-SA to the fullest extent -->
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<!-- permitted by applicable law. -->
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<!-- ============================================================================= -->
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<chapter id="wildcard-routing">
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<title>使用通配符实现消息路由</title>
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<para>ActiveMQ支持使用带通配符的地址对消息路由。</para>
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<para>例如，当创建一个队列时使用了地址<literal>queue.news.#</literal>，那么它就能接收
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所有和这个地址通配符相配的每一个地址的消息。这样的地址如 <literal
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>queue.news.europe</literal> 或 <literal>queue.news.usa</literal> 或 <literal
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>queue.news.usa.sport</literal>等。这样一个消息接收者可以接收<literal>一组</literal>相关
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的地址的消息，而不是只能指定一个具体的地址。</para>
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<note>
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<para>用JMS的术语来说，这个功能就是允许创建“话题组”（topic hierarchy）。</para>
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</note>
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<para>要使用本功能需要将<literal>wild-card-routing-enabled</literal>属性设置为<literal>true</literal>。
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这个属性在 <literal>activemq-configuration.xml</literal> 文件中。默认值是<literal>true</literal>。</para>
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<para>关于通配符的语法参见<xref
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linkend="wildcard-syntax" /> 章及 <xref
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linkend="topic-hierarchy-example" />。</para>
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</chapter>
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