Hi Gergely,
Here are a couple snippets that should be useful.
If I understand correctly, map_metadata is not what you need, because
it only changes existing metadata. Anyway, here's an example (a
simplification of the definition of rewrite_metata in utils.liq):
def map(m)
# m is the list of metadata, as pairs of metadata.
# l is a list of pairs (field_name,pattern)
# for each of those, we evaluate the pattern on the current metadata
def apply(x)
label = fst(x)
value = snd(x)
(label,value % m)
end
list.map(apply,l)
end
map_metadata(map,s)
What you need is easier :) As you guessed you need add_timeout(), but
if you print() it will print on stdout (which might be closed in
daemon mode); if you log() it will go in the logs; if you want to
insert some metadata at some place, you have to setup an
insert_metadata() operator at this point, and then invoke its
insertion command from the add_timeout():
s = insert_metadata(id="xxx",s)
add_timeout(10.,{ execute('xxx.insert key1="val1",key2="val2"') })
Instead of statically putting val1, val2, you can use the result of a
system call (using get_process_output()) to one of your script. You
may also be able to generate your random string using our scripting
language, which has random.float() and random.bool().
Hope that helps,
--
David
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