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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 | 6x 6x 6x | import { createClient } from "redis";
import type { UnauthorizedContext } from "~web/handlers/context";
import { env } from "~web/utils/env";
export type CacheDbOptions = {
mock?: CacheInstance;
};
export type CacheInstance = {
getValue: (key: string) => Promise<string | null>;
setValue: (
key: string,
value: string,
opts?: { expiryInS?: number },
) => Promise<void>;
};
const getRedisInstance = async (): Promise<CacheInstance> => {
const database = createClient({
url: env.CACHE_DATABASE_URL,
socket: {
reconnectStrategy: false,
},
});
try {
await database.connect();
return {
getValue: (key) => database.get(key),
setValue: async (key, value, opts) => {
if (opts?.expiryInS) {
await database.setEx(key, opts.expiryInS, value);
}
await database.set(key, value);
},
};
} catch {
throw new Error(`Cache DB did not response to ping`);
}
};
let cacheInstance: CacheInstance | undefined = undefined;
export const getCacheInstance = async (
ctx: UnauthorizedContext,
): Promise<CacheInstance> => {
if (ctx.cacheDbOptions.mock) {
return ctx.cacheDbOptions.mock;
}
if (!cacheInstance) {
try {
cacheInstance = await getRedisInstance();
return cacheInstance;
} catch {
throw new Error(`Cache DB did not response to ping`);
}
}
return cacheInstance;
};
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