Software /
code /
prosody
File
plugins/mod_uptime.lua @ 10973:39991e40d1dc
util.dbuffer: dynamic string buffer
Similar to util.ringbuffer (and shares almost identical API). Differences:
- size limit is optional and dynamic
- does not allocate a fixed buffer of max_size bytes
- focus on simply storing references to existing string objects where possible,
avoiding unnecessary allocations
- references are still stored in a ring buffer to enable use as a fast FIFO
Optional second parameter to new() provides the number of ring buffer segments. On
Lua 5.2 on my laptop, a segment is ~19 bytes. If the ring buffer fills up, the next
write will compact all strings into a single item.
author | Matthew Wild <mwild1@gmail.com> |
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date | Fri, 26 Jun 2020 16:41:31 +0100 |
parent | 10749:abbdf72b0710 |
child | 12977:74b9e05af71e |
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-- Prosody IM -- Copyright (C) 2008-2010 Matthew Wild -- Copyright (C) 2008-2010 Waqas Hussain -- -- This project is MIT/X11 licensed. Please see the -- COPYING file in the source package for more information. -- local st = require "util.stanza"; local start_time = prosody.start_time; module:hook_global("server-started", function() start_time = prosody.start_time end); -- XEP-0012: Last activity module:add_feature("jabber:iq:last"); module:hook("iq-get/host/jabber:iq:last:query", function(event) local origin, stanza = event.origin, event.stanza; origin.send(st.reply(stanza):tag("query", {xmlns = "jabber:iq:last", seconds = tostring(("%d"):format(os.difftime(os.time(), start_time)))})); return true; end); -- Ad-hoc command module:depends "adhoc"; local adhoc_new = module:require "adhoc".new; function uptime_text() local t = os.time()-prosody.start_time; local seconds = t%60; t = (t - seconds)/60; local minutes = t%60; t = (t - minutes)/60; local hours = t%24; t = (t - hours)/24; local days = t; return string.format("This server has been running for %d day%s, %d hour%s and %d minute%s (since %s)", days, (days ~= 1 and "s") or "", hours, (hours ~= 1 and "s") or "", minutes, (minutes ~= 1 and "s") or "", os.date("%c", prosody.start_time)); end function uptime_command_handler () return { info = uptime_text(), status = "completed" }; end local descriptor = adhoc_new("Get uptime", "uptime", uptime_command_handler, "any"); module:provides("adhoc", descriptor);