// HttpSessionContext - an association of HTTP sessions//// API based on documentation from JavaSoft.//// Copyright (C) 1998 by Jef Poskanzer <jef@acme.com>. All rights reserved.//// Redistribution and use in source and binary forms, with or without// modification, are permitted provided that the following conditions// are met:// 1. Redistributions of source code must retain the above copyright//    notice, this list of conditions and the following disclaimer.// 2. Redistributions in binary form must reproduce the above copyright//    notice, this list of conditions and the following disclaimer in the//    documentation and/or other materials provided with the distribution.//// THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE// ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF// SUCH DAMAGE.//// Visit the ACME Labs Java page for up-to-date versions of this and other// fine Java utilities: http://www.acme.com/java/package Acme.Serve.servlet.http;import Acme.Serve.servlet.*;import java.util.*;/// An association of HTTP sessions.// <P>// This is taken from JavaSoft's Servlet API documentation.// <P>// <A HREF="/resources/classes/Acme/Serve/servlet/http/HttpSessionContext.java">Fetch the software.</A><BR>// <A HREF="/resources/classes/Acme.tar.gz">Fetch the entire Acme package.</A>public interface HttpSessionContext    {    /// Returns the session bound to the specified session ID.    public HttpSession getSession( String sessionId );    /// Returns an enumeration of all of the session IDs in this context.    public Enumeration getIds();    }