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Your IP : 3.141.18.167
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{ QueryResultCache } from \"./QueryResultCache\"\nimport { QueryResultCacheOptions } from \"./QueryResultCacheOptions\"\nimport { PlatformTools } from \"../platform/PlatformTools\"\nimport { DataSource } from \"../data-source/DataSource\"\nimport { QueryRunner } from \"../query-runner/QueryRunner\"\nimport { TypeORMError } from \"../error/TypeORMError\"\n\n/**\n * Caches query result into Redis database.\n */\nexport class RedisQueryResultCache implements QueryResultCache {\n // -------------------------------------------------------------------------\n // Protected Properties\n // -------------------------------------------------------------------------\n\n /**\n * Redis module instance loaded dynamically.\n */\n protected redis: any\n\n /**\n * Connected redis client.\n */\n protected client: any\n\n /**\n * Type of the Redis Client (redis or ioredis).\n */\n protected clientType: \"redis\" | \"ioredis\" | \"ioredis/cluster\"\n\n // -------------------------------------------------------------------------\n // Constructor\n // -------------------------------------------------------------------------\n\n constructor(\n protected connection: DataSource,\n clientType: \"redis\" | \"ioredis\" | \"ioredis/cluster\",\n ) {\n this.clientType = clientType\n this.redis = this.loadRedis()\n }\n\n // -------------------------------------------------------------------------\n // Public Methods\n // -------------------------------------------------------------------------\n\n /**\n * Creates a connection with given cache provider.\n */\n async connect(): Promise<void> {\n const cacheOptions: any = this.connection.options.cache\n if (this.clientType === \"redis\") {\n this.client = this.redis.createClient({\n ...cacheOptions?.options,\n legacyMode: true,\n })\n if (\n typeof this.connection.options.cache === \"object\" &&\n this.connection.options.cache.ignoreErrors\n ) {\n this.client.on(\"error\", (err: any) => {\n this.connection.logger.log(\"warn\", err)\n })\n }\n if (\"connect\" in this.client) {\n await this.client.connect()\n }\n } else if (this.clientType === \"ioredis\") {\n if (cacheOptions && cacheOptions.port) {\n if (cacheOptions.options) {\n this.client = new this.redis(\n cacheOptions.port,\n cacheOptions.options,\n )\n } else {\n this.client = new this.redis(cacheOptions.port)\n }\n } else if (cacheOptions && cacheOptions.options) {\n this.client = new this.redis(cacheOptions.options)\n } else {\n this.client = new this.redis()\n }\n } else if (this.clientType === \"ioredis/cluster\") {\n if (\n cacheOptions &&\n cacheOptions.options &&\n Array.isArray(cacheOptions.options)\n ) {\n this.client = new this.redis.Cluster(cacheOptions.options)\n } else if (\n cacheOptions &&\n cacheOptions.options &&\n cacheOptions.options.startupNodes\n ) {\n this.client = new this.redis.Cluster(\n cacheOptions.options.startupNodes,\n cacheOptions.options.options,\n )\n } else {\n throw new TypeORMError(\n `options.startupNodes required for ${this.clientType}.`,\n )\n }\n }\n }\n\n /**\n * Disconnects the connection\n */\n async disconnect(): Promise<void> {\n return new Promise<void>((ok, fail) => {\n this.client.quit((err: any, result: any) => {\n if (err) return fail(err)\n ok()\n this.client = undefined\n })\n })\n }\n\n /**\n * Creates table for storing cache if it does not exist yet.\n */\n async synchronize(queryRunner: QueryRunner): Promise<void> {}\n\n /**\n * Get data from cache.\n * Returns cache result if found.\n * Returns undefined if result is not cached.\n */\n getFromCache(\n options: QueryResultCacheOptions,\n queryRunner?: QueryRunner,\n ): Promise<QueryResultCacheOptions | undefined> {\n return new Promise<QueryResultCacheOptions | undefined>((ok, fail) => {\n if (options.identifier) {\n this.client.get(options.identifier, (err: any, result: any) => {\n if (err) return fail(err)\n ok(JSON.parse(result))\n })\n } else if (options.query) {\n this.client.get(options.query, (err: any, result: any) => {\n if (err) return fail(err)\n ok(JSON.parse(result))\n })\n } else {\n ok(undefined)\n }\n })\n }\n\n /**\n * Checks if cache is expired or not.\n */\n isExpired(savedCache: QueryResultCacheOptions): boolean {\n return savedCache.time! + savedCache.duration < new Date().getTime()\n }\n\n /**\n * Stores given query result in the cache.\n */\n async storeInCache(\n options: QueryResultCacheOptions,\n savedCache: QueryResultCacheOptions,\n queryRunner?: QueryRunner,\n ): Promise<void> {\n return new Promise<void>((ok, fail) => {\n if (options.identifier) {\n this.client.set(\n options.identifier,\n JSON.stringify(options),\n \"PX\",\n options.duration,\n (err: any, result: any) => {\n if (err) return fail(err)\n ok()\n },\n )\n } else if (options.query) {\n this.client.set(\n options.query,\n JSON.stringify(options),\n \"PX\",\n options.duration,\n (err: any, result: any) => {\n if (err) return fail(err)\n ok()\n },\n )\n }\n })\n }\n\n /**\n * Clears everything stored in the cache.\n */\n async clear(queryRunner?: QueryRunner): Promise<void> {\n return new Promise<void>((ok, fail) => {\n this.client.flushdb((err: any, result: any) => {\n if (err) return fail(err)\n ok()\n })\n })\n }\n\n /**\n * Removes all cached results by given identifiers from cache.\n */\n async remove(\n identifiers: string[],\n queryRunner?: QueryRunner,\n ): Promise<void> {\n await Promise.all(\n identifiers.map((identifier) => {\n return this.deleteKey(identifier)\n }),\n )\n }\n\n // -------------------------------------------------------------------------\n // Protected Methods\n // -------------------------------------------------------------------------\n\n /**\n * Removes a single key from redis database.\n */\n protected deleteKey(key: string): Promise<void> {\n return new Promise<void>((ok, fail) => {\n this.client.del(key, (err: any, result: any) => {\n if (err) return fail(err)\n ok()\n })\n })\n }\n\n /**\n * Loads redis dependency.\n */\n protected loadRedis(): any {\n try {\n if (this.clientType === \"ioredis/cluster\") {\n return PlatformTools.load(\"ioredis\")\n } else {\n return PlatformTools.load(this.clientType)\n }\n } catch (e) {\n throw new TypeORMError(\n `Cannot use cache because ${this.clientType} is not installed. Please run \"npm i ${this.clientType} --save\".`,\n )\n }\n }\n}\n"],"sourceRoot":".."}