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<html><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><!--Converted with jLaTeX2HTML 2002 (1.62) JA patch-1.4patched version by: Kenshi Muto, Debian Project.LaTeX2HTML 2002 (1.62),original version by: Nikos Drakos, CBLU, University of Leeds* revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan* with significant contributions from: Jens Lippmann, Marek Rouchal, Martin Wilck and others --><HTML><HEAD><TITLE>36.7.1.0.1 Creation and startup</TITLE><META NAME="description" CONTENT="36.7.1.0.1 Creation and startup"><META NAME="keywords" CONTENT="everything"><META NAME="resource-type" CONTENT="document"><META NAME="distribution" CONTENT="global"><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"><META NAME="Generator" CONTENT="jLaTeX2HTML v2002 JA patch-1.4"><META HTTP-EQUIV="Content-Style-Type" CONTENT="text/css"><LINK REL="STYLESHEET" HREF="everything.css" tppabs="http://www.isi.edu/nsnam/ns/doc/everything.css"><LINK REL="next" HREF="node519.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node519.html"><LINK REL="previous" HREF="node517.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node517.html"><LINK REL="up" HREF="node517.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node517.html"><LINK REL="next" HREF="node519.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node519.html"></HEAD><BODY ><!--Navigation Panel--><A NAME="tex2html9365" HREF="node519.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node519.html"><IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="file:/usr/share/latex2html/icons/next.png"></A> <A NAME="tex2html9359" HREF="node517.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node517.html"><IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="file:/usr/share/latex2html/icons/up.png"></A> <A NAME="tex2html9353" HREF="node517.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node517.html"><IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="file:/usr/share/latex2html/icons/prev.png"></A> <A NAME="tex2html9361" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html"><IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="file:/usr/share/latex2html/icons/contents.png"></A> <A NAME="tex2html9363" HREF="node590.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node590.html"><IMG WIDTH="43" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="index" SRC="file:/usr/share/latex2html/icons/index.png"></A> <BR><B> Next:</B> <A NAME="tex2html9366" HREF="node519.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node519.html">36.7.1.0.2 OTcl methods</A><B> Up:</B> <A NAME="tex2html9360" HREF="node517.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node517.html">36.7.1 Http/Cache</A><B> Previous:</B> <A NAME="tex2html9354" HREF="node517.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node517.html">36.7.1 Http/Cache</A>   <B> <A NAME="tex2html9362" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html">Contents</A></B>   <B> <A NAME="tex2html9364" HREF="node590.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node590.html">Index</A></B> <BR><BR><!--End of Navigation Panel--><H4><A NAME="SECTION07271010000000000000">36.7.1.0.1 Creation and startup</A></H4><P>Creating an Http/Cache requires the same set of parameters asHttp/Client and Http/Server. After creation, a cache needs to connect to a certain server. Note that this creation can also be done dynamically,when a request comes in and the cache finds that it's not connected to the server. However, we do not model this behavior in current code.Following code is an example:<P><PRE> set cache [new HttpCache $ns $node] # attach cache to \$node; $cache connect $server # connect to \$server;</PRE><P>Like Http/Server, an Http/Cache object waits for requests (and packetsfrom server) after it's initialized as above. When hierarchicalcaching is used, the following can be used to create the hierarchy:<P><PRE> $cache set-parent $parent # set parent cache;</PRE><P>Currently all TTL and multicast invalidation caches support hierarchicalcaching. However, only the two multicast invalidation caches allows multiple cache hierarchies to inter-operate.<P><BR><HR><ADDRESS>2003-09-23</ADDRESS></BODY></HTML>⌨️ 快捷键说明
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