@creditkarma/memcached
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A fully featured Memcached API client, supporting both single and clustered Memcached servers through consistent hashing and failover/failure. Memcached is rewrite of nMemcached, which will be deprecated in the near future.
222 lines • 8.75 kB
JavaScript
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var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __exportStar = (this && this.__exportStar) || function(m, exports) {
for (var p in m) if (p !== "default" && !Object.prototype.hasOwnProperty.call(exports, p)) __createBinding(exports, m, p);
};
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());
});
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.MemcachedClient = exports.Memcached = void 0;
const errors_1 = require("./errors");
const memcached_1 = require("./memcached");
var memcached_2 = require("./memcached");
Object.defineProperty(exports, "Memcached", { enumerable: true, get: function () { return memcached_2.Memcached; } });
__exportStar(require("./types"), exports);
class MemcachedClient {
constructor(servers, options = {}) {
this.defaultTTL = 600;
if (options.defaultTTL !== undefined) {
this.defaultTTL = options.defaultTTL;
}
this.client = new memcached_1.Memcached(servers, options);
}
addListener(eventName, handler) {
this.client.addListener(eventName, handler);
}
get(key, decoder) {
return __awaiter(this, void 0, void 0, function* () {
return new Promise((resolve, reject) => {
this.client.get(key, (err, data) => {
if (err !== undefined) {
reject(new errors_1.MemcachedOpFailed('get', key, err.message));
}
else if (data === undefined) {
reject(new errors_1.MemcachedMissingKey(key));
}
else if (decoder !== undefined) {
resolve(decoder(data));
}
else {
resolve(data);
}
});
});
});
}
getWithDefault(key, defaultValue, decoder) {
return __awaiter(this, void 0, void 0, function* () {
return this.get(key, decoder).catch((err) => {
return defaultValue;
});
});
}
getMulti(keys) {
return __awaiter(this, void 0, void 0, function* () {
return new Promise((resolve, reject) => {
this.client.getMulti(keys, (err, data) => {
if (err !== undefined) {
reject(err);
}
else {
resolve(data);
}
});
});
});
}
gets(key, decoder) {
return __awaiter(this, void 0, void 0, function* () {
return new Promise((resolve, reject) => {
this.client.gets(key, (err, data) => {
if (err !== undefined) {
reject(new errors_1.MemcachedOpFailed('gets', key, err.message));
}
else if (data === undefined) {
reject(new errors_1.MemcachedMissingKey(key));
}
else if (decoder !== undefined) {
const decodedValue = decoder(data.value);
resolve({
cas: data.cas,
value: decodedValue,
});
}
else {
resolve(data);
}
});
});
});
}
set(key, value, ttl = this.defaultTTL) {
return __awaiter(this, void 0, void 0, function* () {
return new Promise((resolve, reject) => {
if (ttl === undefined) {
ttl = this.defaultTTL;
}
this.client.set(key, value, ttl, (err, result) => {
if (err !== undefined) {
reject(new errors_1.MemcachedOpFailed('set', key, err.message));
}
else {
if (result) {
resolve(result);
}
else {
reject(new errors_1.MemcachedOpFailed('set', key));
}
}
});
});
});
}
add(key, value, ttl = this.defaultTTL) {
return __awaiter(this, void 0, void 0, function* () {
return new Promise((resolve, reject) => {
if (ttl === undefined) {
ttl = this.defaultTTL;
}
this.client.add(key, value, ttl, (err, result) => {
if (err !== undefined) {
reject(new errors_1.MemcachedOpFailed('add', key, err.message));
}
else {
if (result) {
resolve(result);
}
else {
reject(new errors_1.MemcachedOpFailed('add', key));
}
}
});
});
});
}
encodeAndSet(key, value, encoder, ttl = this.defaultTTL) {
return __awaiter(this, void 0, void 0, function* () {
const encodedValue = encoder(value);
return this.set(key, encodedValue, ttl);
});
}
cas(key, value, cas, ttl = this.defaultTTL) {
return __awaiter(this, void 0, void 0, function* () {
return new Promise((resolve, reject) => __awaiter(this, void 0, void 0, function* () {
this.client.cas(key, value, cas, ttl, (err, result) => {
if (err !== undefined) {
reject(new errors_1.MemcachedOpFailed('cas', key, err.message));
}
else {
if (result) {
resolve(result);
}
else {
reject(new errors_1.MemcachedOpFailed('cas', key));
}
}
});
}));
});
}
encodeAndCas(key, value, cas, encoder, ttl = this.defaultTTL) {
return __awaiter(this, void 0, void 0, function* () {
const encodedValue = encoder(value);
return this.cas(key, encodedValue, cas, ttl);
});
}
del(key) {
return __awaiter(this, void 0, void 0, function* () {
return new Promise((resolve, reject) => {
this.client.del(key, (err, result) => {
if (err !== undefined) {
reject(new errors_1.MemcachedOpFailed('del', key, err.message));
}
else {
if (result) {
resolve(result);
}
else {
reject(new errors_1.MemcachedOpFailed('del', key));
}
}
});
});
});
}
flush() {
return __awaiter(this, void 0, void 0, function* () {
return new Promise((resolve, reject) => {
this.client.flush((err, result) => {
if (err !== undefined) {
reject(err);
}
else {
resolve(true);
}
});
});
});
}
end() {
this.client.end();
return;
}
}
exports.MemcachedClient = MemcachedClient;
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