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-rw-r--r--core/statsmanager.lua117
1 files changed, 117 insertions, 0 deletions
diff --git a/core/statsmanager.lua b/core/statsmanager.lua
new file mode 100644
index 00000000..67702dd9
--- /dev/null
+++ b/core/statsmanager.lua
@@ -0,0 +1,117 @@
+
+local config = require "core.configmanager";
+local log = require "util.logger".init("stats");
+local timer = require "util.timer";
+local fire_event = prosody.events.fire_event;
+
+local stats_interval_config = config.get("*", "statistics_interval");
+local stats_interval = tonumber(stats_interval_config);
+if stats_config and not stats_interval then
+ log("error", "Invalid 'statistics_interval' setting, statistics will be disabled");
+end
+
+local stats_provider_name;
+local stats_provider_config = config.get("*", "statistics");
+local stats_provider = stats_provider_config;
+
+if not stats_provider and stats_interval then
+ stats_provider = "internal";
+elseif stats_provider and not stats_interval then
+ stats_interval = 60;
+end
+
+local builtin_providers = {
+ internal = "util.statistics";
+ statsd = "util.statsd";
+};
+
+
+local stats, stats_err = false, nil;
+
+if stats_provider then
+ if stats_provider:sub(1,1) == ":" then
+ stats_provider = stats_provider:sub(2);
+ stats_provider_name = "external "..stats_provider;
+ elseif stats_provider then
+ stats_provider_name = "built-in "..stats_provider;
+ stats_provider = builtin_providers[stats_provider];
+ if not stats_provider then
+ log("error", "Unrecognized statistics provider '%s', statistics will be disabled", stats_provider_config);
+ end
+ end
+
+ local have_stats_provider, stats_lib = pcall(require, stats_provider);
+ if not have_stats_provider then
+ stats, stats_err = nil, stats_lib;
+ else
+ local stats_config = config.get("*", "statistics_config");
+ stats, stats_err = stats_lib.new(stats_config);
+ stats_provider_name = stats_lib._NAME or stats_provider_name;
+ end
+end
+
+if stats == nil then
+ log("error", "Error loading statistics provider '%s': %s", stats_provider, stats_err);
+end
+
+local measure, collect;
+local latest_stats = {};
+local changed_stats = {};
+local stats_extra = {};
+
+if stats then
+ function measure(type, name)
+ local f = assert(stats[type], "unknown stat type: "..type);
+ return f(name);
+ end
+
+ if stats_interval then
+ log("debug", "Statistics enabled using %s provider, collecting every %d seconds", stats_provider_name, stats_interval);
+
+ local mark_collection_start = measure("times", "stats.collection");
+ local mark_processing_start = measure("times", "stats.processing");
+
+ function collect()
+ local mark_collection_done = mark_collection_start();
+ fire_event("stats-update");
+ mark_collection_done();
+
+ if stats.get_stats then
+ changed_stats, stats_extra = {}, {};
+ for stat_name, getter in pairs(stats.get_stats()) do
+ local type, value, extra = getter();
+ local old_value = latest_stats[stat_name];
+ latest_stats[stat_name] = value;
+ if value ~= old_value then
+ changed_stats[stat_name] = value;
+ end
+ if extra then
+ stats_extra[stat_name] = extra;
+ end
+ end
+ local mark_processing_done = mark_processing_start();
+ fire_event("stats-updated", { stats = latest_stats, changed_stats = changed_stats, stats_extra = stats_extra });
+ mark_processing_done();
+ end
+ return stats_interval;
+ end
+ timer.add_task(stats_interval, collect);
+ prosody.events.add_handler("server-started", function () collect() end, -1);
+ else
+ log("debug", "Statistics enabled using %s provider, collection is disabled", stats_provider_name);
+ end
+else
+ log("debug", "Statistics disabled");
+ function measure() return measure; end
+end
+
+
+return {
+ measure = measure;
+ get_stats = function ()
+ return latest_stats, changed_stats, stats_extra;
+ end;
+ get = function (name)
+ return latest_stats[name], stats_extra[name];
+ end;
+};