Mercurial > prosody-modules

annotate mod_log_ringbuffer/mod_log_ringbuffer.lua @ 5918:d4a8644a1cc5

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mod_pubsub_serverinfo: fix syntax error
author Guus der Kinderen <guus.der.kinderen@gmail.com>
date Tue, 04 Jun 2024 09:06:44 +0200
parents 97c9b76867ca
children
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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 event_hooks = {};
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94
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95 local function ringbuffer_log_sink_maker(sink_config)
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96 local write, dump = new_buffer(sink_config);
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97
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98 local timestamps = sink_config.timestamps;
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99
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100 if timestamps == true or timestamps == nil then
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101 timestamps = default_timestamp; -- Default format
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102 elseif timestamps then
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103 timestamps = timestamps .. " ";
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104 end
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105
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106 local function handler()
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107 dump_buffer(dump, sink_config.filename or get_filename(sink_config.filename_template));
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108 end
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109
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110 if sink_config.signal then
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111 module:hook_global("signal/"..sink_config.signal, handler);
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112 event_hooks[handler] = "signal/"..sink_config.signal;
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113 elseif sink_config.event then
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114 module:hook_global(sink_config.event, handler);
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115 event_hooks[handler] = sink_config.event;
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116 end
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117
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118 return function (name, level, message, ...)
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119 local line = format("%s%s\t%s\t%s\n", timestamps and os_date(timestamps) or "", name, level, format(message, ...));
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120 write(line);
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121 end;
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122 end
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123
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124 module:hook_global("reopen-log-files", function()
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125 for handler, event_name in pairs(event_hooks) do
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126 module:unhook_object_event(prosody.events, event_name, handler);
97c9b76867ca mod_log_ringbuffer: Detach event handlers on logging reload (thanks Menel)
Kim Alvefur <zash@zash.se>
parents: 5852
diff changeset
127 event_hooks[handler] = nil;
97c9b76867ca mod_log_ringbuffer: Detach event handlers on logging reload (thanks Menel)
Kim Alvefur <zash@zash.se>
parents: 5852
diff changeset
128 end
97c9b76867ca mod_log_ringbuffer: Detach event handlers on logging reload (thanks Menel)
Kim Alvefur <zash@zash.se>
parents: 5852
diff changeset
129 end, 1);
97c9b76867ca mod_log_ringbuffer: Detach event handlers on logging reload (thanks Menel)
Kim Alvefur <zash@zash.se>
parents: 5852
diff changeset
130
4205
481c4d75e77d mod_log_ringbuffer: New module to send logs to an in-memory ringbuffer
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
131 loggingmanager.register_sink_type("ringbuffer", ringbuffer_log_sink_maker);