@graphql-hive/core/cjs/circuit-breaker/cache.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
/**
 * Simple in-memory cache implementation
 * @class MemoryCache
 * @property {Map} cache Cache map
 */
class MemoryCache {
    constructor(maxEntries) {
        this.cache = new Map();
        this.maxEntries = maxEntries !== null && maxEntries !== void 0 ? maxEntries : 2 ** 24 - 1; // Max size for Map is 2^24.
    }
    /**
     * Get cache value by key
     * @param {string} key Cache key
     * @return {any} Response from cache
     */
    get(key) {
        const cached = this.cache.get(key);
        if (cached) {
            if (cached.expiresAt > Date.now() || cached.expiresAt === 0) {
                return cached.value;
            }
            this.cache.delete(key);
        }
        return undefined;
    }
    /**
     * Set cache key with value and ttl
     * @param {string} key Cache key
     * @param {any} value Value to cache
     * @param {number} ttl Time to live in milliseconds
     * @return {void}
     */
    set(key, value, ttl) {
        // Evict first entry when at capacity - only when it's a new key.
        if (this.cache.size === this.maxEntries && this.get(key) === undefined) {
            this.cache.delete(this.cache.keys().next().value);
        }
        this.cache.set(key, {
            expiresAt: ttl,
            value,
        });
    }
    /**
     * Delete cache key
     * @param {string} key Cache key
     * @return {void}
     */
    delete(key) {
        this.cache.delete(key);
    }
    /**
     * Clear cache
     * @returns {void}
     */
    flush() {
        this.cache.clear();
    }
}
exports.default = MemoryCache;