typeorm
Version:
Data-Mapper ORM for TypeScript, ES7, ES6, ES5. Supports MySQL, PostgreSQL, MariaDB, SQLite, MS SQL Server, Oracle, MongoDB databases.
223 lines (221 loc) • 9.33 kB
JavaScript
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (_) try {
if (f = 1, y && (t = y[op[0] & 2 ? "return" : op[0] ? "throw" : "next"]) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [0, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
import { PlatformTools } from "../platform/PlatformTools";
/**
* Caches query result into Redis database.
*/
var RedisQueryResultCache = /** @class */ (function () {
// -------------------------------------------------------------------------
// Constructor
// -------------------------------------------------------------------------
function RedisQueryResultCache(connection) {
this.connection = connection;
this.redis = this.loadRedis();
}
// -------------------------------------------------------------------------
// Public Methods
// -------------------------------------------------------------------------
/**
* Creates a connection with given cache provider.
*/
RedisQueryResultCache.prototype.connect = function () {
return __awaiter(this, void 0, void 0, function () {
var cacheOptions;
return __generator(this, function (_a) {
cacheOptions = this.connection.options.cache;
if (cacheOptions && cacheOptions.options) {
this.client = this.redis.createClient(cacheOptions.options);
}
else {
this.client = this.redis.createClient();
}
return [2 /*return*/];
});
});
};
/**
* Creates a connection with given cache provider.
*/
RedisQueryResultCache.prototype.disconnect = function () {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
return [2 /*return*/, new Promise(function (ok, fail) {
_this.client.quit(function (err, result) {
if (err)
return fail(err);
ok();
_this.client = undefined;
});
})];
});
});
};
/**
* Creates table for storing cache if it does not exist yet.
*/
RedisQueryResultCache.prototype.synchronize = function (queryRunner) {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
return [2 /*return*/];
});
});
};
/**
* Caches given query result.
* Returns cache result if found.
* Returns undefined if result is not cached.
*/
RedisQueryResultCache.prototype.getFromCache = function (options, queryRunner) {
var _this = this;
return new Promise(function (ok, fail) {
if (options.identifier) {
_this.client.get(options.identifier, function (err, result) {
if (err)
return fail(err);
ok(JSON.parse(result));
});
}
else if (options.query) {
_this.client.get(options.query, function (err, result) {
if (err)
return fail(err);
ok(JSON.parse(result));
});
}
else {
ok(undefined);
}
});
};
/**
* Checks if cache is expired or not.
*/
RedisQueryResultCache.prototype.isExpired = function (savedCache) {
return (savedCache.time + savedCache.duration) < new Date().getTime();
};
/**
* Stores given query result in the cache.
*/
RedisQueryResultCache.prototype.storeInCache = function (options, savedCache, queryRunner) {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
return [2 /*return*/, new Promise(function (ok, fail) {
if (options.identifier) {
_this.client.set(options.identifier, JSON.stringify(options), function (err, result) {
if (err)
return fail(err);
ok();
});
}
else if (options.query) {
_this.client.set(options.query, JSON.stringify(options), function (err, result) {
if (err)
return fail(err);
ok();
});
}
})];
});
});
};
/**
* Clears everything stored in the cache.
*/
RedisQueryResultCache.prototype.clear = function (queryRunner) {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
return [2 /*return*/, new Promise(function (ok, fail) {
_this.client.flushdb(function (err, result) {
if (err)
return fail(err);
ok();
});
})];
});
});
};
/**
* Removes all cached results by given identifiers from cache.
*/
RedisQueryResultCache.prototype.remove = function (identifiers, queryRunner) {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, Promise.all(identifiers.map(function (identifier) {
return _this.deleteKey(identifier);
}))];
case 1:
_a.sent();
return [2 /*return*/];
}
});
});
};
// -------------------------------------------------------------------------
// Protected Methods
// -------------------------------------------------------------------------
/**
* Removes a single key from redis database.
*/
RedisQueryResultCache.prototype.deleteKey = function (key) {
var _this = this;
return new Promise(function (ok, fail) {
_this.client.del(key, function (err, result) {
if (err)
return fail(err);
ok();
});
});
};
/**
* Loads redis dependency.
*/
RedisQueryResultCache.prototype.loadRedis = function () {
try {
return PlatformTools.load("redis");
}
catch (e) {
throw new Error("Cannot use cache because redis is not installed. Please run \"npm i redis --save\".");
}
};
return RedisQueryResultCache;
}());
export { RedisQueryResultCache };
//# sourceMappingURL=RedisQueryResultCache.js.map