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28 lines
737 B
JavaScript
28 lines
737 B
JavaScript
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// Limit cache size, LRU (least recently used) algorithm.
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"use strict";
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var toPosInteger = require("es5-ext/number/to-pos-integer")
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, lruQueue = require("lru-queue")
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, extensions = require("../lib/registered-extensions");
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extensions.max = function (max, conf, options) {
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var postfix, queue, hit;
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max = toPosInteger(max);
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if (!max) return;
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queue = lruQueue(max);
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postfix = (options.async && extensions.async) || (options.promise && extensions.promise)
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? "async" : "";
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conf.on("set" + postfix, hit = function (id) {
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id = queue.hit(id);
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if (id === undefined) return;
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conf.delete(id);
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});
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conf.on("get" + postfix, hit);
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conf.on("delete" + postfix, queue.delete);
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conf.on("clear" + postfix, queue.clear);
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};
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