mirror of
https://github.com/musix-org/musix-oss
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33 lines
603 B
JavaScript
33 lines
603 B
JavaScript
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// A cache that expires.
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module.exports = class Cache extends Map {
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constructor() {
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super();
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this.timeout = 1000;
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}
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set(key, value) {
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super.set(key, {
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tid: setTimeout(this.delete.bind(this, key), this.timeout),
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value,
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});
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}
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get(key) {
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let entry = super.get(key);
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if (entry) {
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return entry.value;
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}
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}
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delete(key) {
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let entry = super.get(key);
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if (entry) {
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clearTimeout(entry.tid);
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super.delete(key);
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}
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}
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clear() {
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for (let entry of this.values()) {
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clearTimeout(entry.tid);
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}
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super.clear();
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}
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};
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