prosody
39ee70fbb009
util/error.lua

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util/error.lua @ 9751:39ee70fbb009

mod_mam: Perform message expiry based on building an index by date For each day, store a set of users that have new messages. To expire messages, we collect the union of sets of users from dates that fall outside the cleanup range. The previous algoritm did not work well with many users, especially with the default settings.
author Kim Alvefur <zash@zash.se>
date Thu, 03 Jan 2019 17:25:43 +0100
parent 9749:9361bd1b9c9b
child 10069:6f317e51544d
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1 local error_mt = { __name = "error" };
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2
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3 function error_mt:__tostring()
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4 return ("error<%s:%s:%s>"):format(self.type, self.condition, self.text);
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5 end
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6
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7 local function is_err(e)
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8 return getmetatable(e) == error_mt;
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9 end
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10
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11 local function new(e, context, registry)
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12 local template = (registry and registry[e]) or e or {};
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13 return setmetatable({
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14 type = template.type or "cancel";
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15 condition = template.condition or "undefined-condition";
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16 text = template.text;
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17
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18 context = context or template.context or { _error_id = e };
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19 }, error_mt);
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20 end
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21
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22 local function coerce(ok, err, ...)
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23 if ok or is_err(err) then
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24 return ok, err, ...;
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25 end
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26
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27 local new_err = setmetatable({
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28 native = err;
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29
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30 type = "cancel";
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31 condition = "undefined-condition";
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32 }, error_mt);
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33 return ok, new_err, ...;
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34 end
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35
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36 local function from_stanza(stanza, context)
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37 local error_type, condition, text = stanza:get_error();
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38 return setmetatable({
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39 type = error_type or "cancel";
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40 condition = condition or "undefined-condition";
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41 text = text;
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42
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43 context = context or { stanza = stanza };
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44 }, error_mt);
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45 end
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46
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47 return {
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48 new = new;
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49 coerce = coerce;
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50 is_err = is_err;
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51 from_stanza = from_stanza;
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52 }