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<h1 class="page">Service system</h1>
<div id="preamble">
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<i class="fa icon-warning" title="Warning"></i>
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<td class="content">
<div class="paragraph">
<p>This article covers a deprecated <abbr title="Application Programming Interface">API</abbr>! See <a href="../../jme3/advanced/networking.html" class="page">networking</a> for current documentation.</p>
</div>
</td>
</tr>
</table>
</div>
<div class="paragraph">
<p>The service system is meant to create a common way of using plugins. It is a tiny system, on Server and Client level. In this tutorial I&#8217;ll tell you how to use services, and how to create your own.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="creating-services"><a class="anchor" href="#creating-services"></a>Creating services</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Creating services is really easy - you just have to implement the Service interface. <strong>Make sure you don&#8217;t do anything time consuming</strong> since the developer may not be expecting it. Services can choose to support Server, Client, or both. To implement this, use the appropriate constructors:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">public class MyExampleService implements Service {
   public MyExampleService(Server server) {
      // By adding the constructor with the Server as argument, this service
      //  now supports servers.
   }

   public MyExampleService(Client client) {
      // Same goes for client. I could just leave this constructor out, and
      //  SpiderMonkey would determine this service does not support client mode.
   }
}</code></pre>
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<div class="sect1">
<h2 id="using-services"><a class="anchor" href="#using-services"></a>Using services</h2>
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<p>The Server and Client class both have a method called getService(). It retrieves a service based on class name, and instantiates it if necessary. From there you can use the service.</p>
</div>
<div class="paragraph">
<p>The Service system is not a terribly powerful system, neither does it do safety checks and service management - it just provides a way to commonly manage extensions.</p>
</div>
<div class="paragraph">
<p>That&#8217;s it! Next tutorial we&#8217;re going to have a look at how to use the streaming <abbr title="Application Programming Interface">API</abbr>.</p>
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