module:set_global();
local loggingmanager = require "core.loggingmanager";
local format = require "util.format".format;
local pposix = require "util.pposix";
local rb = require "util.ringbuffer";
local default_timestamp = "%b %d %H:%M:%S ";
local max_chunk_size = module:get_option_number("log_ringbuffer_chunk_size", 16384);
local os_date = os.date;
local default_filename_template = "{paths.data}/ringbuffer-logs-{pid}-{count}.log";
local render_filename = require "util.interpolation".new("%b{}", function (s) return s; end, {
yyyymmdd = function (t)
return os_date("%Y%m%d", t);
end;
hhmmss = function (t)
return os_date("%H%M%S", t);
end;
});
local dump_count = 0;
local function dump_buffer(buffer, filename)
dump_count = dump_count + 1;
local f, err = io.open(filename, "a+");
if not f then
module:log("error", "Unable to open output file: %s", err);
return;
end
local bytes_remaining = buffer:length();
f:write(("-- Dumping %d bytes at %s --\n"):format(bytes_remaining, os_date(default_timestamp)));
while bytes_remaining > 0 do
local chunk_size = math.min(bytes_remaining, max_chunk_size);
local chunk = buffer:read(chunk_size);
if not chunk then
f:write("-- Dump aborted due to error --\n\n");
f:close();
return;
end
f:write(chunk);
bytes_remaining = bytes_remaining - chunk_size;
end
f:write("-- End of dump --\n\n");
f:close();
end
local function get_filename(filename_template)
filename_template = filename_template or default_filename_template;
return render_filename(filename_template, {
paths = prosody.paths;
pid = pposix.getpid();
count = dump_count;
time = os.time();
});
end
local function ringbuffer_log_sink_maker(sink_config)
local buffer = rb.new(sink_config.size or 100*1024);
local timestamps = sink_config.timestamps;
if timestamps == true or timestamps == nil then
timestamps = default_timestamp; -- Default format
elseif timestamps then
timestamps = timestamps .. " ";
end
local function dump()
dump_buffer(buffer, get_filename(sink_config.filename));
end
if sink_config.signal then
require "util.signal".signal(sink_config.signal, dump);
elseif sink_config.event then
module:hook_global(sink_config.event, dump);
end
return function (name, level, message, ...)
buffer:write(format("%s%s\t%s\t%s\n", timestamps and os_date(timestamps) or "", name, level, format(message, ...)));
end;
end
loggingmanager.register_sink_type("ringbuffer", ringbuffer_log_sink_maker);