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digraph cache_logic {
nodesep=1.25;
center=true;
node[fontname="Lucida Sans Unicode",labelloc=c,margin=0.10,0.03]
edge[fontname="Lucida Sans Unicode",fontcolor="#444444",labeldistance=20];
receive -> pass[label="uncacheable request",color=grey];
receive -> lookup[label="cacheable request"];
pass -> deliver[label="",color=grey];
lookup -> hit[label="fresh"];
lookup -> fetch[label="stale (needs validation)"];
lookup -> miss[label="uncached"];
hit -> deliver[label="sizzling"];
hit -> pass[label="bailing...",color=grey];
miss -> fetch[label=""];
miss -> pass[color=grey];
fetch -> store[label="cacheable"];
fetch -> deliver[label="not cacheable",color=grey];
store -> deliver[label="KTHX"];
}
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