memcached-node
Version:
Node.js client for memcached
443 lines (442 loc) • 22.1 kB
JavaScript
"use strict";
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
return extendStatics(d, b);
};
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
var __assign = (this && this.__assign) || function () {
__assign = Object.assign || function(t) {
for (var s, i = 1, n = arguments.length; i < n; i++) {
s = arguments[i];
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
t[p] = s[p];
}
return t;
};
return __assign.apply(this, arguments);
};
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
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) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
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function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
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if (y = 0, t) op = [op[0] & 2, t.value];
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case 0: case 1: t = op; break;
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}
};
Object.defineProperty(exports, "__esModule", { value: true });
var events_1 = require("events");
var connection_1 = require("./connection");
var error_1 = require("./error");
var defaultOptions = __assign(__assign({}, connection_1.defaultConnectionOptions), { initSize: 1, poolSize: 10, wait: false, waitTimeout: 3000 });
var Memcached = /** @class */ (function (_super) {
__extends(Memcached, _super);
function Memcached(args, options) {
var _this = _super.call(this) || this;
_this._connectionId = 0;
_this._connectionPool = [];
_this._connectionConfig = args;
_this._options = __assign(__assign({}, defaultOptions), options);
for (var i = 0; i < _this._options.initSize; i++) {
var connectionOptions = options;
var connection = new connection_1.Connection(args, ++_this._connectionId, connectionOptions);
connection.on("close", function (connection) {
return _this.emit("close", connection);
});
connection.on("drop", function (connection, server) {
return _this.emit("drop", connection, server);
});
_this._connectionPool.push(connection);
}
return _this;
}
Memcached.prototype.clean = function () {
this._connectionPool.forEach(function (connection) {
connection.close(true);
});
};
Memcached.prototype.createPool = function () {
return __awaiter(this, void 0, void 0, function () {
var connTry;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
connTry = this._connectionPool.map(function (connection) {
return connection.connect(connection_1.Status.IDLE);
});
return [4 /*yield*/, Promise.all(connTry)];
case 1: return [2 /*return*/, _a.sent()];
}
});
});
};
Memcached.prototype.getConnection = function () {
if (this._connectionPool.length === 0) {
var connection = new connection_1.Connection(this._connectionConfig, ++this._connectionId);
this._connectionPool.push(connection);
return connection;
}
var idleConnections = this._getIdleConnections();
if (idleConnections.length > 0) {
var connection = idleConnections[0];
connection.status = connection_1.Status.RESEARVED;
return idleConnections[0];
}
throw new error_1.ConnectionError("no connection available", error_1.ConnectionErrorCode.ER_CONN_NO_AVAILABLE);
};
Memcached.prototype._getIdleConnections = function () {
return this._connectionPool.filter(function (connection) {
return connection.isIdle();
});
};
Memcached.prototype._cmd = function (fn) {
return __awaiter(this, void 0, void 0, function () {
var connection, resp;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
if (!this._options.wait) return [3 /*break*/, 2];
return [4 /*yield*/, this._getConnection()];
case 1:
connection = _a.sent();
return [3 /*break*/, 3];
case 2:
connection = this.getConnection();
_a.label = 3;
case 3: return [4 /*yield*/, fn(connection)];
case 4:
resp = _a.sent();
connection.close();
return [2 /*return*/, resp];
}
});
});
};
Memcached.prototype._getConnection = function () {
return __awaiter(this, void 0, void 0, function () {
var err_1, connErr, _a;
var _this = this;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
_b.trys.push([0, 1, , 5]);
return [2 /*return*/, this.getConnection()];
case 1:
err_1 = _b.sent();
connErr = err_1;
_a = connErr.code;
switch (_a) {
case error_1.ConnectionErrorCode.ER_CONN_NO_AVAILABLE: return [3 /*break*/, 2];
}
return [3 /*break*/, 4];
case 2: return [4 /*yield*/, new Promise(function (resolve, reject) {
_this._connectionPool.forEach(function (conn) {
var timeout = setTimeout(function () {
reject(new error_1.ConnectionError("timout to get connection", error_1.ConnectionErrorCode.ER_CONN_TIMEOUT));
}, _this._options.waitTimeout);
conn.once("changeStatus", function (id) {
var connection = _this._connectionPool.find(function (conn) {
return conn.id === id;
});
// this shouldn't happen
if (!connection) {
throw err_1;
}
clearTimeout(timeout);
connection.status = connection_1.Status.RESEARVED;
resolve(connection);
});
});
})];
case 3:
_b.sent();
return [3 /*break*/, 4];
case 4: throw connErr;
case 5: return [2 /*return*/];
}
});
});
};
Memcached.prototype.createConnection = function () {
return __awaiter(this, void 0, void 0, function () {
var connectionOptions, connection;
var _this = this;
return __generator(this, function (_a) {
if (this._connectionPool.length >= this._options.poolSize) {
throw new error_1.ConnectionError("connection reached the pool size", error_1.ConnectionErrorCode.ER_CONN_MAX_CONNECTION);
}
connectionOptions = this._options;
connection = new connection_1.Connection(this._connectionConfig, ++this._connectionId, connectionOptions);
connection.on("close", function (connection) {
return _this._handleClose(connection);
});
connection.on("drop", function (connection, server) {
return _this._handleDrop(connection, server);
});
this._connectionPool.push(connection);
if (this._connectionPool.length === this._options.poolSize) {
this.emit("maxConnection", this._options.poolSize);
}
return [2 /*return*/, connection];
});
});
};
Memcached.prototype._handleClose = function (removedConnection) {
this._connectionPool = this._connectionPool.filter(function (connection) {
return connection.id !== removedConnection.id;
});
this.emit("close", removedConnection);
};
Memcached.prototype._handleDrop = function (belongingConnection, server) {
this.emit("drop", belongingConnection, server);
};
Memcached.prototype.get = function (keys, options) {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this._cmd(function (connection) { return __awaiter(_this, void 0, void 0, function () { return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, connection.get(keys, options)];
case 1: return [2 /*return*/, _a.sent()];
}
}); }); })];
case 1: return [2 /*return*/, _a.sent()];
}
});
});
};
Memcached.prototype.gets = function (keys, options) {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this._cmd(function (connection) { return __awaiter(_this, void 0, void 0, function () { return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, connection.gets(keys, options)];
case 1: return [2 /*return*/, _a.sent()];
}
}); }); })];
case 1: return [2 /*return*/, _a.sent()];
}
});
});
};
Memcached.prototype.set = function (key, value, options) {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this._cmd(function (connection) { return __awaiter(_this, void 0, void 0, function () { return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, connection.set(key, value, options)];
case 1: return [2 /*return*/, _a.sent()];
}
}); }); })];
case 1: return [2 /*return*/, _a.sent()];
}
});
});
};
Memcached.prototype.add = function (key, value, options) {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this._cmd(function (connection) { return __awaiter(_this, void 0, void 0, function () { return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, connection.add(key, value, options)];
case 1: return [2 /*return*/, _a.sent()];
}
}); }); })];
case 1: return [2 /*return*/, _a.sent()];
}
});
});
};
Memcached.prototype.append = function (key, value, options) {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this._cmd(function (connection) { return __awaiter(_this, void 0, void 0, function () { return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, connection.append(key, value, options)];
case 1: return [2 /*return*/, _a.sent()];
}
}); }); })];
case 1: return [2 /*return*/, _a.sent()];
}
});
});
};
Memcached.prototype.prepend = function (key, value, options) {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this._cmd(function (connection) { return __awaiter(_this, void 0, void 0, function () { return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, connection.prepend(key, value, options)];
case 1: return [2 /*return*/, _a.sent()];
}
}); }); })];
case 1: return [2 /*return*/, _a.sent()];
}
});
});
};
Memcached.prototype.replace = function (key, value, options) {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this._cmd(function (connection) { return __awaiter(_this, void 0, void 0, function () { return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, connection.replace(key, value, options)];
case 1: return [2 /*return*/, _a.sent()];
}
}); }); })];
case 1: return [2 /*return*/, _a.sent()];
}
});
});
};
Memcached.prototype.cas = function (key, value, casId, options) {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this._cmd(function (connection) { return __awaiter(_this, void 0, void 0, function () { return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, connection.cas(key, value, casId, options)];
case 1: return [2 /*return*/, _a.sent()];
}
}); }); })];
case 1: return [2 /*return*/, _a.sent()];
}
});
});
};
Memcached.prototype.delete = function (key) {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this._cmd(function (connection) { return __awaiter(_this, void 0, void 0, function () { return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, connection.delete(key)];
case 1: return [2 /*return*/, _a.sent()];
}
}); }); })];
case 1: return [2 /*return*/, _a.sent()];
}
});
});
};
Memcached.prototype.gat = function (keys, expire, options) {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this._cmd(function (connection) { return __awaiter(_this, void 0, void 0, function () { return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, connection.gat(keys, expire, options)];
case 1: return [2 /*return*/, _a.sent()];
}
}); }); })];
case 1: return [2 /*return*/, _a.sent()];
}
});
});
};
Memcached.prototype.gats = function (keys, expire, options) {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this._cmd(function (connection) { return __awaiter(_this, void 0, void 0, function () { return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, connection.gats(keys, expire, options)];
case 1: return [2 /*return*/, _a.sent()];
}
}); }); })];
case 1: return [2 /*return*/, _a.sent()];
}
});
});
};
Memcached.prototype.touch = function (key, expires) {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this._cmd(function (connection) { return __awaiter(_this, void 0, void 0, function () { return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, connection.touch(key, expires)];
case 1: return [2 /*return*/, _a.sent()];
}
}); }); })];
case 1: return [2 /*return*/, _a.sent()];
}
});
});
};
Memcached.prototype.stats = function () {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this._cmd(function (connection) { return __awaiter(_this, void 0, void 0, function () { return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, connection.stats()];
case 1: return [2 /*return*/, _a.sent()];
}
}); }); })];
case 1: return [2 /*return*/, _a.sent()];
}
});
});
};
return Memcached;
}(events_1.EventEmitter));
exports.Memcached = Memcached;
function createPool(args, options) {
return new Memcached(args, options);
}
exports.createPool = createPool;