html" title="interface in jakarta.websocket">EndpointConfig</a>&nbsp;config)</code>
<div class="block">This method is called with the endpoint configuration object of the endpoint this decoder is intended for when it
 is about to be brought into service.</div>
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<td class="colFirst"><code>abstract void</code></td>
<td class="colLast"><span class="typeNameLabel">Endpoint.</span><code><span class="memberNameLink"><a href="../../../jakarta/websocket/Endpoint.html#onOpen-jakarta.