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6b84d11aa09b
util/smqueue.lua

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util/smqueue.lua @ 13633:6b84d11aa09b

mod_storage_sql: Detect SQLite3 without UPSERT (or SQLCipher 3.x) SQLCipher v3.4.1 (the version in Debian 12) is based on SQLite3 v3.15.2, while UPSERT support was introduced in SQLite3 v3.24.0 This check was not needed before because we v3.24.0 has not been in a version of Debian we support for a long, long time. Note however that SQLCipher databases are not compatible across major versions, upgrading from v3.x to v4.x requires executing a migration. Attempts at making `prosodyctl mod_storage_sql upgrade` perform such a migration has not been successful. Executing the following in the `sqlcipher` tool should do the migration: PRAGMA key = '<key material>'; PRAGMA cipher_migrate;
author Kim Alvefur <zash@zash.se>
date Thu, 23 Jan 2025 19:33:05 +0100
parent 12975:d10957394a3c
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d10957394a3c util: Prefix module imports with prosody namespace
Kim Alvefur <zash@zash.se>
parents: 12058
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1 local queue = require("prosody.util.queue");
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daced16154fa util.smqueue: Abstract queue with acknowledgements and overflow
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2
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3 local lib = { smqueue = {} }
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4
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5 local smqueue = lib.smqueue;
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6
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7 function smqueue:push(v)
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8 self._head = self._head + 1;
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9
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10 assert(self._queue:push(v));
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11 end
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12
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13 function smqueue:ack(h)
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14 if h < self._tail then
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15 return nil, "tail"
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16 elseif h > self._head then
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17 return nil, "head"
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18 end
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19
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20 local acked = {};
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21 self._tail = h;
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22 local expect = self._head - self._tail;
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23 while expect < self._queue:count() do
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24 local v = self._queue:pop();
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25 if not v then return nil, "pop" end
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26 table.insert(acked, v);
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27 end
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28 return acked
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29 end
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30
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31 function smqueue:count_unacked() return self._head - self._tail end
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32
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33 function smqueue:count_acked() return self._tail end
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34
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35 function smqueue:resumable() return self._queue:count() >= (self._head - self._tail) end
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36
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37 function smqueue:resume() return self._queue:items() end
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38
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39 function smqueue:consume() return self._queue:consume() end
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40
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4860da718e87 util.smqueue: Simplify compat table, fix dependent modules (thanks Martin)
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41 function smqueue:table()
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42 local t = {};
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43 for i, v in self:resume() do t[i] = v; end
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44 return t
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45 end
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46
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47 local function freeze(q) return { head = q._head; tail = q._tail } end
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48
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49 local queue_mt = { __name = "smqueue"; __index = smqueue; __len = smqueue.count_unacked; __freeze = freeze }
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50
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51 function lib.new(size)
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52 assert(size > 0);
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53 return setmetatable({ _head = 0; _tail = 0; _queue = queue.new(size, true) }, queue_mt)
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54 end
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55
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56 return lib