 notification events about HttpSession lifecycle changes.</div>
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<td class="colFirst"><a href="../../../javax/servlet/http/HttpUpgradeHandler.html" title="interface in javax.servlet.http">HttpUpgradeHandler</a></td>
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<div class="block">This interface encapsulates the upgrade protocol processing.</div>
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<td class="colFirst"><a href="../../../javax/servlet/http/Part.html" title="interface in javax.servlet.http">Part</a></td>