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55c5ddedf4
This reverts commit c4f19465a6
.
39 lines
803 B
JavaScript
39 lines
803 B
JavaScript
class ModelCache {
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constructor(maxSize) {
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this.cache_ = [];
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this.maxSize_ = maxSize;
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}
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fromCache(ModelClass, id) {
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for (let i = 0; i < this.cache_.length; i++) {
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const c = this.cache_[i];
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if (c.id === id && c.modelType === ModelClass.modelType()) return c
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}
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return null;
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}
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cache(ModelClass, id, model) {
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if (this.fromCache(ModelClass, model.id)) return;
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this.cache_.push({
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id: id,
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model: model,
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modelType: ModelClass.modelType(),
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});
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if (this.cache_.length > this.maxSize_) {
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this.cache_.splice(0, 1);
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}
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}
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async load(ModelClass, id) {
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const cached = this.fromCache(ModelClass, id);
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if (cached) return cached.model;
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const output = await ModelClass.load(id);
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this.cache(ModelClass, id, output);
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return output;
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}
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}
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module.exports = ModelCache; |