RedisCacheAdapter.js 11 KB

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  1. "use strict";
  2. Object.defineProperty(exports, "__esModule", {
  3. value: true
  4. });
  5. exports.default = exports.RedisCacheAdapter = void 0;
  6. var _redis = require("redis");
  7. var _logger = _interopRequireDefault(require("../../logger"));
  8. var _KeyPromiseQueue = require("../../KeyPromiseQueue");
  9. function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
  10. const DEFAULT_REDIS_TTL = 30 * 1000; // 30 seconds in milliseconds
  11. const FLUSH_DB_KEY = '__flush_db__';
  12. function debug(...args) {
  13. const message = ['RedisCacheAdapter: ' + arguments[0]].concat(args.slice(1, args.length));
  14. _logger.default.debug.apply(_logger.default, message);
  15. }
  16. const isValidTTL = ttl => typeof ttl === 'number' && ttl > 0;
  17. class RedisCacheAdapter {
  18. constructor(redisCtx, ttl = DEFAULT_REDIS_TTL) {
  19. this.ttl = isValidTTL(ttl) ? ttl : DEFAULT_REDIS_TTL;
  20. this.client = (0, _redis.createClient)(redisCtx);
  21. this.queue = new _KeyPromiseQueue.KeyPromiseQueue();
  22. this.client.on('error', err => {
  23. _logger.default.error('RedisCacheAdapter client error', {
  24. error: err
  25. });
  26. });
  27. this.client.on('connect', () => {});
  28. this.client.on('reconnecting', () => {});
  29. this.client.on('ready', () => {});
  30. }
  31. async connect() {
  32. if (this.client.isOpen) {
  33. return;
  34. }
  35. return this.client.connect();
  36. }
  37. async handleShutdown() {
  38. if (!this.client) {
  39. return;
  40. }
  41. try {
  42. await this.client.quit();
  43. } catch (err) {
  44. _logger.default.error('RedisCacheAdapter error on shutdown', {
  45. error: err
  46. });
  47. }
  48. }
  49. async get(key) {
  50. debug('get', {
  51. key
  52. });
  53. try {
  54. await this.queue.enqueue(key);
  55. const res = await this.client.get(key);
  56. if (!res) {
  57. return null;
  58. }
  59. return JSON.parse(res);
  60. } catch (err) {
  61. _logger.default.error('RedisCacheAdapter error on get', {
  62. error: err
  63. });
  64. }
  65. }
  66. async put(key, value, ttl = this.ttl) {
  67. value = JSON.stringify(value);
  68. debug('put', {
  69. key,
  70. value,
  71. ttl
  72. });
  73. await this.queue.enqueue(key);
  74. if (ttl === 0) {
  75. // ttl of zero is a logical no-op, but redis cannot set expire time of zero
  76. return;
  77. }
  78. if (ttl === Infinity) {
  79. return this.client.set(key, value);
  80. }
  81. if (!isValidTTL(ttl)) {
  82. ttl = this.ttl;
  83. }
  84. return this.client.set(key, value, {
  85. PX: ttl
  86. });
  87. }
  88. async del(key) {
  89. debug('del', {
  90. key
  91. });
  92. await this.queue.enqueue(key);
  93. return this.client.del(key);
  94. }
  95. async clear() {
  96. debug('clear');
  97. await this.queue.enqueue(FLUSH_DB_KEY);
  98. return this.client.sendCommand(['FLUSHDB']);
  99. }
  100. // Used for testing
  101. getAllKeys() {
  102. return this.client.keys('*');
  103. }
  104. }
  105. exports.RedisCacheAdapter = RedisCacheAdapter;
  106. var _default = exports.default = RedisCacheAdapter;
  107. //# sourceMappingURL=data:application/json;charset=utf-8;base64,{"version":3,"names":["_redis","require","_logger","_interopRequireDefault","_KeyPromiseQueue","e","__esModule","default","DEFAULT_REDIS_TTL","FLUSH_DB_KEY","debug","args","message","arguments","concat","slice","length","logger","apply","isValidTTL","ttl","RedisCacheAdapter","constructor","redisCtx","client","createClient","queue","KeyPromiseQueue","on","err","error","connect","isOpen","handleShutdown","quit","get","key","enqueue","res","JSON","parse","put","value","stringify","Infinity","set","PX","del","clear","sendCommand","getAllKeys","keys","exports","_default"],"sources":["../../../src/Adapters/Cache/RedisCacheAdapter.js"],"sourcesContent":["import { createClient } from 'redis';\nimport logger from '../../logger';\nimport { KeyPromiseQueue } from '../../KeyPromiseQueue';\n\nconst DEFAULT_REDIS_TTL = 30 * 1000; // 30 seconds in milliseconds\nconst FLUSH_DB_KEY = '__flush_db__';\n\nfunction debug(...args: any) {\n  const message = ['RedisCacheAdapter: ' + arguments[0]].concat(args.slice(1, args.length));\n  logger.debug.apply(logger, message);\n}\n\nconst isValidTTL = ttl => typeof ttl === 'number' && ttl > 0;\n\nexport class RedisCacheAdapter {\n  constructor(redisCtx, ttl = DEFAULT_REDIS_TTL) {\n    this.ttl = isValidTTL(ttl) ? ttl : DEFAULT_REDIS_TTL;\n    this.client = createClient(redisCtx);\n    this.queue = new KeyPromiseQueue();\n    this.client.on('error', err => { logger.error('RedisCacheAdapter client error', { error: err }) });\n    this.client.on('connect', () => {});\n    this.client.on('reconnecting', () => {});\n    this.client.on('ready', () => {});\n  }\n\n  async connect() {\n    if (this.client.isOpen) {\n      return;\n    }\n    return this.client.connect();\n  }\n\n  async handleShutdown() {\n    if (!this.client) {\n      return;\n    }\n    try {\n      await this.client.quit();\n    } catch (err) {\n      logger.error('RedisCacheAdapter error on shutdown', { error: err });\n    }\n  }\n\n  async get(key) {\n    debug('get', { key });\n    try {\n      await this.queue.enqueue(key);\n      const res = await this.client.get(key);\n      if (!res) {\n        return null;\n      }\n      return JSON.parse(res);\n    } catch (err) {\n      logger.error('RedisCacheAdapter error on get', { error: err });\n    }\n  }\n\n  async put(key, value, ttl = this.ttl) {\n    value = JSON.stringify(value);\n    debug('put', { key, value, ttl });\n    await this.queue.enqueue(key);\n    if (ttl === 0) {\n      // ttl of zero is a logical no-op, but redis cannot set expire time of zero\n      return;\n    }\n\n    if (ttl === Infinity) {\n      return this.client.set(key, value);\n    }\n\n    if (!isValidTTL(ttl)) {\n      ttl = this.ttl;\n    }\n    return this.client.set(key, value, { PX: ttl });\n  }\n\n  async del(key) {\n    debug('del', { key });\n    await this.queue.enqueue(key);\n    return this.client.del(key);\n  }\n\n  async clear() {\n    debug('clear');\n    await this.queue.enqueue(FLUSH_DB_KEY);\n    return this.client.sendCommand(['FLUSHDB']);\n  }\n\n  // Used for testing\n  getAllKeys() {\n    return this.client.keys('*');\n  }\n}\n\nexport default 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