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|
/*
* we should format labels in a readable form like
* label="
* {vbf_stp_startfetch:|
* {vcl_backend_fetch\{\}|bereq.*}|
* {abandon|
* <fetch>fetch}}"
*
* <rant>
* ... but some servers in the v-c.o build farm use old graphviz 2.26.3
* which cannot handle labels with additional whitespace properly, so
* for the time being we need to fall back into dark middle ages and
* use illegibly long lines
* </rant>
* -- slink 20141013
*/
digraph cache_fetch {
margin="0.5"
center="1"
/*** cache_fetch.c ***/
subgraph cluster_backend {
style=filled
color=aliceblue
RETRY [shape=plaintext]
v_b_f_BGFETCH [label="BGFETCH",
shape=box,
style=filled,
color=turquoise]
v_b_f_FETCH [label="FETCH",
shape=box,
style=filled,
color=turquoise]
v_b_f_BGFETCH -> v_b_f [style=bold,color=green]
v_b_f_FETCH -> v_b_f [style=bold,color=blue]
v_b_f_FETCH -> v_b_f [style=bold,color=red]
RETRY -> v_b_f [color=purple]
/* vbf_stp_startfetch() */
v_b_f [
shape=record
label="{vbf_stp_startfetch:|{vcl_backend_fetch\{\}|bereq.*}|{<error>error|fail|abandon|<fetch>fetch}}"
]
v_b_f:error:s -> v_b_e
v_b_f:fetch:s -> v_b_hdrs [style=bold]
v_b_hdrs [ label="send bereq,\nread beresp (headers)"]
v_b_hdrs -> v_b_r [style=bold]
v_b_hdrs -> v_b_e
v_b_r [
shape=record
label="{vbf_stp_startfetch:|{vcl_backend_response\{\}|{bereq.*|beresp.*}}|{<error>error|fail|{retry|{<max>max?|<retry>ok?}}|abandon|{deliver or pass|{<fetch_304>304?|<non_304>other?}}}}"
]
v_b_r:error:s -> v_b_e
v_b_r:retry -> v_b_r_retry [color=purple]
v_b_r:max -> v_b_e
v_b_r:fetch_304:s -> vbf_stp_condfetch
v_b_r:non_304:s -> vbf_stp_fetch
v_b_r_retry [label="RETRY",shape=plaintext]
vbf_stp_fetchbody [
shape=record
fontcolor=grey
color=grey
label="{vbf_stp_fetchbody:|get storage|read body, run VFPs|{fetch_fail?|error?|<ok>ok?}}"
]
vbf_stp_fetchbody:ok:s -> vbf_stp_fetchend
vbf_stp_fetch [
shape=record
fontcolor=grey
color=grey
label="{vbf_stp_fetch:|setup VFPs|get object|{error?|<body>body?}}"
]
vbf_stp_fetch:body:s -> vbf_stp_fetchbody
vbf_stp_fetch:body:s -> vbf_stp_fetchend
vbf_stp_fetchend [
shape=record
fontcolor=grey
color=grey
label="{vbf_stp_fetchend:|finalize object and director|<done>done}"
]
vbf_stp_fetchend:done:s -> FETCH_DONE
vbf_stp_condfetch [
shape=record
fontcolor=grey
color=grey
label="{vbf_stp_condfetch:|copy obj attr|steal body|{fetch_fail?|<ok>ok?}}"
]
vbf_stp_condfetch:ok:s -> vbf_stp_fetchend
fail [shape=plaintext]
fail -> FETCH_FAIL
/* vbf_stp_error */
v_b_e [
shape=record
label="{vbf_stp_error:|{vcl_backend_error\{\}|{bereq.*|beresp.*}}|{{retry|{<fail>fail|<max>max?|<retry>ok?}}|abandon|<deliver>deliver}}}"
]
// v_b_e:deliver aka "backend synth" - goes into cache
v_b_e:deliver -> FETCH_DONE [label="\"backend synth\""]
v_b_e:retry -> v_b_e_retry [color=purple]
v_b_e_retry [label="RETRY",shape=plaintext]
v_b_e:max:s -> FETCH_FAIL
v_b_e_retry [label="RETRY",shape=plaintext]
FETCH_DONE [label="FETCH_DONE",
shape=box,style=filled,color=turquoise]
abandon [shape=plaintext]
abandon -> FETCH_FAIL
// F_STP_FAIL
FETCH_FAIL [label="FETCH_FAIL",
shape=box,style=filled,color=turquoise]
}
}
|
