85 lines
2.8 KiB
JavaScript
85 lines
2.8 KiB
JavaScript
'use strict';
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// - Reports stats about:
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// * Total number of renderers
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// * For mapnik renderers:
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// - the mapnik-pool status: count, unused and waiting
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// - the internally cached objects: png and grid
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var _ = require('underscore');
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function RendererStatsReporter (rendererCache, statsInterval) {
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this.rendererCache = rendererCache;
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this.statsInterval = statsInterval || 6e4;
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this.renderersStatsIntervalId = null;
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}
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module.exports = RendererStatsReporter;
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RendererStatsReporter.prototype.start = function () {
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var self = this;
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this.renderersStatsIntervalId = setInterval(function () {
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var rendererCacheEntries = self.rendererCache.renderers;
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if (!rendererCacheEntries) {
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return null;
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}
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global.statsClient.gauge('windshaft.rendercache.count', _.keys(rendererCacheEntries).length);
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var renderersStats = _.reduce(rendererCacheEntries, function (_rendererStats, cacheEntry) {
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var stats = cacheEntry.renderer && cacheEntry.renderer.getStats && cacheEntry.renderer.getStats();
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if (!stats) {
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return _rendererStats;
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}
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_rendererStats.pool.count += stats.pool.count;
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_rendererStats.pool.unused += stats.pool.unused;
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_rendererStats.pool.waiting += stats.pool.waiting;
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_rendererStats.cache.grid += stats.cache.grid;
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_rendererStats.cache.png += stats.cache.png;
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return _rendererStats;
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},
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{
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pool: {
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count: 0,
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unused: 0,
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waiting: 0
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},
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cache: {
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png: 0,
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grid: 0
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}
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}
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);
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global.statsClient.gauge('windshaft.mapnik-cache.png', renderersStats.cache.png);
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global.statsClient.gauge('windshaft.mapnik-cache.grid', renderersStats.cache.grid);
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global.statsClient.gauge('windshaft.mapnik-pool.count', renderersStats.pool.count);
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global.statsClient.gauge('windshaft.mapnik-pool.unused', renderersStats.pool.unused);
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global.statsClient.gauge('windshaft.mapnik-pool.waiting', renderersStats.pool.waiting);
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}, this.statsInterval);
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this.rendererCache.on('err', rendererCacheErrorListener);
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this.rendererCache.on('gc', gcTimingListener);
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};
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function rendererCacheErrorListener () {
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global.statsClient.increment('windshaft.rendercache.error');
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}
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function gcTimingListener (gcTime) {
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global.statsClient.timing('windshaft.rendercache.gc', gcTime);
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}
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RendererStatsReporter.prototype.stop = function () {
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this.rendererCache.removeListener('err', rendererCacheErrorListener);
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this.rendererCache.removeListener('gc', gcTimingListener);
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clearInterval(this.renderersStatsIntervalId);
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this.renderersStatsIntervalId = null;
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};
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