Mercurial > prosody-modules
annotate mod_log_ringbuffer/mod_log_ringbuffer.lua @ 4734:e58ec4b3cf90
mod_rest: Add an anonymous mode
Could be useful for a demo instance.
author | Kim Alvefur <zash@zash.se> |
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date | Mon, 01 Nov 2021 15:08:21 +0100 |
parents | df2ccb42a241 |
children | 133b23758cf6 |
rev | line source |
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1 module:set_global(); |
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2 |
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3 local loggingmanager = require "core.loggingmanager"; |
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4 local format = require "util.format".format; |
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5 local pposix = require "util.pposix"; |
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6 local rb = require "util.ringbuffer"; |
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7 local queue = require "util.queue"; |
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8 |
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9 local default_timestamp = "%b %d %H:%M:%S "; |
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10 local max_chunk_size = module:get_option_number("log_ringbuffer_chunk_size", 16384); |
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11 |
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12 local os_date = os.date; |
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13 |
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14 local default_filename_template = "{paths.data}/ringbuffer-logs-{pid}-{count}.log"; |
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15 local render_filename = require "util.interpolation".new("%b{}", function (s) return s; end, { |
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16 yyyymmdd = function (t) |
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17 return os_date("%Y%m%d", t); |
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18 end; |
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19 hhmmss = function (t) |
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20 return os_date("%H%M%S", t); |
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21 end; |
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22 }); |
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23 |
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24 local dump_count = 0; |
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25 |
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26 local function dump_buffer(dump, filename) |
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27 dump_count = dump_count + 1; |
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28 local f, err = io.open(filename, "a+"); |
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29 if not f then |
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30 module:log("error", "Unable to open output file: %s", err); |
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31 return; |
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32 end |
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33 f:write(("-- Dumping log buffer at %s --\n"):format(os_date(default_timestamp))); |
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34 dump(f); |
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35 f:write("-- End of dump --\n\n"); |
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36 f:close(); |
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37 end |
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38 |
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39 local function get_filename(filename_template) |
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40 filename_template = filename_template or default_filename_template; |
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41 return render_filename(filename_template, { |
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42 paths = prosody.paths; |
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43 pid = pposix.getpid(); |
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44 count = dump_count; |
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45 time = os.time(); |
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46 }); |
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47 end |
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48 |
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49 local function new_buffer(config) |
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50 local write, dump; |
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51 |
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52 if config.lines then |
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53 local buffer = queue.new(config.lines, true); |
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54 function write(line) |
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55 buffer:push(line); |
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56 end |
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57 function dump(f) |
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58 -- COMPAT w/0.11 - update to use :consume() |
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59 for line in buffer.pop, buffer do |
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60 f:write(line); |
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61 end |
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62 end |
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63 else |
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64 local buffer_size = config.size or 100*1024; |
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65 local buffer = rb.new(buffer_size); |
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66 function write(line) |
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67 if not buffer:write(line) then |
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68 if #line > buffer_size then |
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69 buffer:discard(buffer_size); |
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70 buffer:write(line:sub(-buffer_size)); |
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71 else |
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72 buffer:discard(#line); |
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73 buffer:write(line); |
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74 end |
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75 end |
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76 end |
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77 function dump(f) |
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78 local bytes_remaining = buffer:length(); |
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79 while bytes_remaining > 0 do |
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80 local chunk_size = math.min(bytes_remaining, max_chunk_size); |
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81 local chunk = buffer:read(chunk_size); |
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82 if not chunk then |
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83 return; |
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84 end |
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85 f:write(chunk); |
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86 bytes_remaining = bytes_remaining - chunk_size; |
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87 end |
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88 end |
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89 end |
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90 return write, dump; |
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91 end |
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92 |
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93 local function ringbuffer_log_sink_maker(sink_config) |
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94 local write, dump = new_buffer(sink_config); |
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95 |
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96 local timestamps = sink_config.timestamps; |
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97 |
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98 if timestamps == true or timestamps == nil then |
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99 timestamps = default_timestamp; -- Default format |
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100 elseif timestamps then |
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101 timestamps = timestamps .. " "; |
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102 end |
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103 |
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104 local function handler() |
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105 dump_buffer(dump, sink_config.filename or get_filename(sink_config.filename_template)); |
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106 end |
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107 |
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108 if sink_config.signal then |
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109 require "util.signal".signal(sink_config.signal, handler); |
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110 elseif sink_config.event then |
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111 module:hook_global(sink_config.event, handler); |
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112 end |
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113 |
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114 return function (name, level, message, ...) |
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115 local line = format("%s%s\t%s\t%s\n", timestamps and os_date(timestamps) or "", name, level, format(message, ...)); |
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116 write(line); |
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117 end; |
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118 end |
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119 |
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120 loggingmanager.register_sink_type("ringbuffer", ringbuffer_log_sink_maker); |