| 1 | 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{QueryResultCache} from \"./QueryResultCache\";\nimport {QueryResultCacheOptions} from \"./QueryResultCacheOptions\";\nimport {PlatformTools} from \"../platform/PlatformTools\";\nimport {Connection} from \"../connection/Connection\";\nimport {QueryRunner} from \"../query-runner/QueryRunner\";\n\n/**\n * Caches query result into Redis database.\n */\nexport class RedisQueryResultCache implements QueryResultCache {\n\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(protected connection: Connection, clientType: \"redis\" | \"ioredis\" | \"ioredis/cluster\") {\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\n\n async connect(): Promise<void> {\n const cacheOptions: any = this.connection.options.cache;\n if (this.clientType === \"redis\") {\n if (cacheOptions && cacheOptions.options) {\n this.client = this.redis.createClient(cacheOptions.options);\n } else {\n this.client = this.redis.createClient();\n }\n } else if (this.clientType === \"ioredis\") {\n 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 (cacheOptions && cacheOptions.options && cacheOptions.options instanceof Array) {\n this.client = new this.redis.Cluster(cacheOptions.options);\n } else if (cacheOptions && cacheOptions.options && cacheOptions.options.startupNodes) {\n this.client = new this.redis.Cluster(cacheOptions.options.startupNodes, cacheOptions.options.options);\n } else {\n throw new Error(`options.startupNodes required for ${this.clientType}.`);\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 /**\n * Caches given query result.\n * Returns cache result if found.\n * Returns undefined if result is not cached.\n */\n getFromCache(options: QueryResultCacheOptions, queryRunner?: QueryRunner): Promise<QueryResultCacheOptions|undefined> {\n return new Promise<QueryResultCacheOptions|undefined>((ok, fail) => {\n\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\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\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(options: QueryResultCacheOptions, savedCache: QueryResultCacheOptions, queryRunner?: QueryRunner): Promise<void> {\n return new Promise<void>((ok, fail) => {\n if (options.identifier) {\n this.client.set(options.identifier, JSON.stringify(options), \"PX\", options.duration, (err: any, result: any) => {\n if (err) return fail(err);\n ok();\n });\n\n } else if (options.query) {\n this.client.set(options.query, JSON.stringify(options), \"PX\", options.duration, (err: any, result: any) => {\n if (err) return fail(err);\n ok();\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(identifiers: string[], queryRunner?: QueryRunner): Promise<void> {\n await Promise.all(identifiers.map(identifier => {\n return this.deleteKey(identifier);\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 return PlatformTools.load(this.clientType);\n\n } catch (e) {\n throw new Error(`Cannot use cache because ${this.clientType} is not installed. Please run \"npm i ${this.clientType} --save\".`);\n }\n }\n\n\n}\n"],"sourceRoot":".."} |