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annotate mod_throttle_presence/mod_throttle_presence.lua @ 162:fe9c4daee076

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mod_throttle_presence: Buffer up presence for up to flush_presence_seconds and send latest presence stanzas for each contact at once
author Matthew Wild <mwild1@gmail.com>
date Thu, 03 Jun 2010 03:02:33 +0100
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children d8c50448d0e7
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fe9c4daee076 mod_throttle_presence: Buffer up presence for up to flush_presence_seconds and send latest presence stanzas for each contact at once
Matthew Wild <mwild1@gmail.com>
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1 local add_filter = require "util.filters".add_filter;
fe9c4daee076 mod_throttle_presence: Buffer up presence for up to flush_presence_seconds and send latest presence stanzas for each contact at once
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2 local add_task = require "util.timer".add_task;
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4 local buffer_seconds = module:get_option_number("flush_presence_seconds");
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6 local function throttle_session(data)
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7 local session = data.session;
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8 local buffer, flushing = {}, false;
fe9c4daee076 mod_throttle_presence: Buffer up presence for up to flush_presence_seconds and send latest presence stanzas for each contact at once
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9 local timer_active = false;
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10 local function flush_buffer()
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11 module:log("debug", "Flushing buffer for %s", session.full_jid);
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12 flushing = true;
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13 for jid, presence in pairs(buffer) do
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14 session.send(presence);
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15 end
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16 flushing = false;
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17 end
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18 local function throttle_presence(stanza)
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19 if stanza.name ~= "presence" or (stanza.attr.type and stanza.attr.type ~= "unavailable") then
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20 module:log("debug", "Non-presence stanza for %s: %s", session.full_jid, tostring(stanza));
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21 flush_buffer();
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22 elseif not flushing then
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23 module:log("debug", "Buffering presence stanza from %s to %s", stanza.attr.from, session.full_jid);
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24 buffer[stanza.attr.from] = stanza;
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25 if not timer_active and buffer_seconds then
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26 timer_active = true;
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27 add_task(buffer_seconds, flush_buffer);
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28 end
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29 return nil; -- Drop this stanza (we've stored it for later)
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30 end
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31 return stanza;
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32 end
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33 add_filter(session, "stanzas/out", throttle_presence);
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34 end
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37 module:hook("resource-bind", throttle_session);