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<h2 title="Interface Connection.UpgradeTo" class="title">Interface Connection.UpgradeTo</h2>
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<dt>All Known Implementing Classes:</dt>
<dd><code><a href="../websocket/common/io/AbstractWebSocketConnection.html" title="class in org.eclipse.jetty.websocket.common.io">AbstractWebSocketConnection</a></code>, <code><a href="../proxy/ConnectHandler.DownstreamConnection.html" title="class in org.eclipse.jetty.proxy">ConnectHandler.DownstreamConnection</a></code>, <code><a href="../http2/server/HTTP2ServerConnection.html" title="class in org.eclipse.jetty.http2.server">HTTP2ServerConnection</a></code>, <code><a href="../server/HttpConnection.html" title="class in org.eclipse.jetty.server">HttpConnection</a></code>, <code><a href="ssl/SslConnection.html" title="class in org.eclipse.jetty.io.ssl">SslConnection</a></code>, <code><a href="../websocket/client/io/WebSocketClientConnection.html" title="class in org.eclipse.jetty.websocket.client.io">WebSocketClientConnection</a></code>, <code><a href="../websocket/server/WebSocketServerConnection.html" title="class in org.eclipse.jetty.websocket.server">WebSocketServerConnection</a></code></dd>
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<pre>public static interface <span class="typeNameLabel">Connection.UpgradeTo</span></pre>
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<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#onUpgradeTo(java.nio.ByteBuffer)">onUpgradeTo</a></span>&#8203;(java.nio.ByteBuffer&nbsp;prefilled)</code></th>
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<div class="block">Callback method invoked when this connection is upgraded.</div>
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<h4>onUpgradeTo</h4>
<pre class="methodSignature">void&nbsp;onUpgradeTo&#8203;(java.nio.ByteBuffer&nbsp;prefilled)</pre>
<div class="block"><p>Callback method invoked when this connection is upgraded.</p>
<p>This must be called before <a href="Connection.html#onOpen()"><code>Connection.onOpen()</code></a>.</p></div>
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<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>prefilled</code> - An optional buffer that can contain prefilled data. Typically this
results from an upgrade of one protocol to the other where the old connection has buffered
data destined for the new connection. The new connection must take ownership of the buffer
and is responsible for returning it to the buffer pool</dd>
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