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index.js
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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const _ = require("lodash");
const RedisInst = require("redis");
const EventEmitter = require("events").EventEmitter;
class RedisSMQ extends EventEmitter {
constructor(options = {}) {
super(options);
this.asyncify = (methodKey) => {
const asyncMethodKey = methodKey + "Async";
this[asyncMethodKey] = (...args) => {
return new Promise((resolve, reject) => {
this[methodKey](...args, (err, result) => {
if (err) {
reject(err);
return;
}
resolve(result);
});
});
};
};
this.quit = (cb) => {
if (cb === undefined) {
cb = () => { };
}
this.redis.quit(cb);
};
this._getQueue = (qname, uid, cb) => {
const mc = [
["hmget", `${this.redisns}${qname}:Q`, "vt", "delay", "maxsize"],
["time"]
];
this.redis.multi(mc).exec((err, resp) => {
if (err) {
this._handleError(cb, err);
return;
}
if (resp[0][0] === null || resp[0][1] === null || resp[0][2] === null) {
this._handleError(cb, "queueNotFound");
return;
}
const ms = this._formatZeroPad(Number(resp[1][1]), 6);
const ts = Number(resp[1][0] + ms.toString(10).slice(0, 3));
const q = {
vt: parseInt(resp[0][0], 10),
delay: parseInt(resp[0][1], 10),
maxsize: parseInt(resp[0][2], 10),
ts: ts
};
if (uid) {
uid = this._makeid(22);
q.uid = Number(resp[1][0] + ms).toString(36) + uid;
}
cb(null, q);
});
};
this.changeMessageVisibility = (options, cb) => {
if (this._validate(options, ["qname", "id", "vt"], cb) === false)
return;
this._getQueue(options.qname, false, (err, q) => {
if (err) {
this._handleError(cb, err);
return;
}
if (this.changeMessageVisibility_sha1) {
this._changeMessageVisibility(options, q, cb);
return;
}
this.on("scriptload:changeMessageVisibility", () => {
this._changeMessageVisibility(options, q, cb);
});
});
};
this._changeMessageVisibility = (options, q, cb) => {
this.redis.evalsha(this.changeMessageVisibility_sha1, 3, `${this.redisns}${options.qname}`, options.id, q.ts + options.vt * 1000, (err, resp) => {
if (err) {
this._handleError(cb, err);
return;
}
cb(null, resp);
});
};
this.createQueue = (options, cb) => {
const key = `${this.redisns}${options.qname}:Q`;
options.vt = options.vt != null ? options.vt : 30;
options.delay = options.delay != null ? options.delay : 0;
options.maxsize = options.maxsize != null ? options.maxsize : 65536;
if (this._validate(options, ["qname", "vt", "delay", "maxsize"], cb) === false)
return;
this.redis.time((err, resp) => {
if (err) {
this._handleError(cb, err);
return;
}
const mc = [
["hsetnx", key, "vt", options.vt],
["hsetnx", key, "delay", options.delay],
["hsetnx", key, "maxsize", options.maxsize],
["hsetnx", key, "created", resp[0]],
["hsetnx", key, "modified", resp[0]],
];
this.redis.multi(mc).exec((err, resp) => {
if (err) {
this._handleError(cb, err);
return;
}
if (resp[0] === 0) {
this._handleError(cb, "queueExists");
return;
}
this.redis.sadd(`${this.redisns}QUEUES`, options.qname, (err, resp) => {
if (err) {
this._handleError(cb, err);
return;
}
cb(null, 1);
});
});
});
};
this.deleteMessage = (options, cb) => {
if (this._validate(options, ["qname", "id"], cb) === false)
return;
const key = `${this.redisns}${options.qname}`;
const mc = [
["zrem", key, options.id],
["hdel", `${key}:Q`, `${options.id}`, `${options.id}:rc`, `${options.id}:fr`]
];
this.redis.multi(mc).exec((err, resp) => {
if (err) {
this._handleError(cb, err);
return;
}
if (resp[0] === 1 && resp[1] > 0) {
cb(null, 1);
}
else {
cb(null, 0);
}
});
};
this.deleteQueue = (options, cb) => {
if (this._validate(options, ["qname"], cb) === false)
return;
const key = `${this.redisns}${options.qname}`;
const mc = [
["del", `${key}:Q`, key],
["srem", `${this.redisns}QUEUES`, options.qname]
];
this.redis.multi(mc).exec((err, resp) => {
if (err) {
this._handleError(cb, err);
return;
}
if (resp[0] === 0) {
this._handleError(cb, "queueNotFound");
return;
}
cb(null, 1);
});
};
this.getQueueAttributes = (options, cb) => {
if (this._validate(options, ["qname"], cb) === false)
return;
const key = `${this.redisns}${options.qname}`;
this.redis.time((err, resp) => {
if (err) {
this._handleError(cb, err);
return;
}
const mc = [
["hmget", `${key}:Q`, "vt", "delay", "maxsize", "totalrecv", "totalsent", "created", "modified"],
["zcard", key],
["zcount", key, resp[0] + "000", "+inf"]
];
this.redis.multi(mc).exec((err, resp) => {
if (err) {
this._handleError(cb, err);
return;
}
if (resp[0][0] === null) {
this._handleError(cb, "queueNotFound");
return;
}
const o = {
vt: parseInt(resp[0][0], 10),
delay: parseInt(resp[0][1], 10),
maxsize: parseInt(resp[0][2], 10),
totalrecv: parseInt(resp[0][3], 10) || 0,
totalsent: parseInt(resp[0][4], 10) || 0,
created: parseInt(resp[0][5], 10),
modified: parseInt(resp[0][6], 10),
msgs: resp[1],
hiddenmsgs: resp[2]
};
cb(null, o);
});
});
};
this._handleReceivedMessage = (cb) => {
return (err, resp) => {
if (err) {
this._handleError(cb, err);
return;
}
if (!resp.length) {
cb(null, {});
return;
}
const o = {
id: resp[0],
message: resp[1],
rc: resp[2],
fr: Number(resp[3]),
sent: Number(parseInt(resp[0].slice(0, 10), 36) / 1000)
};
cb(null, o);
};
};
this.initScript = () => {
const script_popMessage = `local msg = redis.call("ZRANGEBYSCORE", KEYS[1], "-inf", KEYS[2], "LIMIT", "0", "1")
if #msg == 0 then
return {}
end
redis.call("HINCRBY", KEYS[1] .. ":Q", "totalrecv", 1)
local mbody = redis.call("HGET", KEYS[1] .. ":Q", msg[1])
local rc = redis.call("HINCRBY", KEYS[1] .. ":Q", msg[1] .. ":rc", 1)
local o = {msg[1], mbody, rc}
if rc==1 then
table.insert(o, KEYS[2])
else
local fr = redis.call("HGET", KEYS[1] .. ":Q", msg[1] .. ":fr")
table.insert(o, fr)
end
redis.call("ZREM", KEYS[1], msg[1])
redis.call("HDEL", KEYS[1] .. ":Q", msg[1], msg[1] .. ":rc", msg[1] .. ":fr")
return o`;
const script_receiveMessage = `local msg = redis.call("ZRANGEBYSCORE", KEYS[1], "-inf", KEYS[2], "LIMIT", "0", "1")
if #msg == 0 then
return {}
end
redis.call("ZADD", KEYS[1], KEYS[3], msg[1])
redis.call("HINCRBY", KEYS[1] .. ":Q", "totalrecv", 1)
local mbody = redis.call("HGET", KEYS[1] .. ":Q", msg[1])
local rc = redis.call("HINCRBY", KEYS[1] .. ":Q", msg[1] .. ":rc", 1)
local o = {msg[1], mbody, rc}
if rc==1 then
redis.call("HSET", KEYS[1] .. ":Q", msg[1] .. ":fr", KEYS[2])
table.insert(o, KEYS[2])
else
local fr = redis.call("HGET", KEYS[1] .. ":Q", msg[1] .. ":fr")
table.insert(o, fr)
end
return o`;
const script_changeMessageVisibility = `local msg = redis.call("ZSCORE", KEYS[1], KEYS[2])
if not msg then
return 0
end
redis.call("ZADD", KEYS[1], KEYS[3], KEYS[2])
return 1`;
this.redis.script("load", script_popMessage, (err, resp) => {
if (err) {
console.log(err);
return;
}
this.popMessage_sha1 = resp;
this.emit("scriptload:popMessage");
});
this.redis.script("load", script_receiveMessage, (err, resp) => {
if (err) {
console.log(err);
return;
}
this.receiveMessage_sha1 = resp;
this.emit("scriptload:receiveMessage");
});
this.redis.script("load", script_changeMessageVisibility, (err, resp) => {
if (err) {
console.log(err);
return;
}
this.changeMessageVisibility_sha1 = resp;
this.emit('scriptload:changeMessageVisibility');
});
};
this.listQueues = (cb) => {
this.redis.smembers(`${this.redisns}QUEUES`, (err, resp) => {
if (err) {
this._handleError(cb, err);
return;
}
cb(null, resp);
});
};
this.popMessage = (options, cb) => {
if (this._validate(options, ["qname"], cb) === false)
return;
this._getQueue(options.qname, false, (err, q) => {
if (err) {
this._handleError(cb, err);
return;
}
if (this.popMessage_sha1) {
this._popMessage(options, q, cb);
return;
}
this.on("scriptload:popMessage", () => {
this._popMessage(options, q, cb);
});
});
};
this.receiveMessage = (options, cb) => {
if (this._validate(options, ["qname"], cb) === false)
return;
this._getQueue(options.qname, false, (err, q) => {
if (err) {
this._handleError(cb, err);
return;
}
options.vt = options.vt != null ? options.vt : q.vt;
if (this._validate(options, ["vt"], cb) === false)
return;
if (this.receiveMessage_sha1) {
this._receiveMessage(options, q, cb);
return;
}
this.on("scriptload:receiveMessage", () => {
this._receiveMessage(options, q, cb);
});
});
};
this._popMessage = (options, q, cb) => {
this.redis.evalsha(this.popMessage_sha1, 2, `${this.redisns}${options.qname}`, q.ts, this._handleReceivedMessage(cb));
};
this._receiveMessage = (options, q, cb) => {
this.redis.evalsha(this.receiveMessage_sha1, 3, `${this.redisns}${options.qname}`, q.ts, q.ts + options.vt * 1000, this._handleReceivedMessage(cb));
};
this.sendMessage = (options, cb) => {
if (this._validate(options, ["qname"], cb) === false)
return;
this._getQueue(options.qname, true, (err, q) => {
if (err) {
this._handleError(cb, err);
return;
}
options.delay = options.delay != null ? options.delay : q.delay;
if (this._validate(options, ["delay"], cb) === false)
return;
if (typeof options.message !== "string") {
this._handleError(cb, "messageNotString");
return;
}
if (q.maxsize !== -1 && options.message.length > q.maxsize) {
this._handleError(cb, "messageTooLong");
return;
}
const key = `${this.redisns}${options.qname}`;
const mc = [
["zadd", key, q.ts + options.delay * 1000, q.uid],
["hset", `${key}:Q`, q.uid, options.message],
["hincrby", `${key}:Q`, "totalsent", 1]
];
if (this.realtime) {
mc.push(["zcard", key]);
}
this.redis.multi(mc).exec((err, resp) => {
if (err) {
this._handleError(cb, err);
return;
}
if (this.realtime) {
this.redis.publish(`${this.redisns}rt:${options.qname}`, resp[3]);
}
cb(null, q.uid);
});
});
};
this.setQueueAttributes = (options, cb) => {
const props = ["vt", "maxsize", "delay"];
let k = [];
for (let item of props) {
if (options[item] != null) {
k.push(item);
}
}
if (k.length === 0) {
this._handleError(cb, "noAttributeSupplied");
return;
}
if (this._validate(options, ["qname"].concat(k), cb) === false)
return;
const key = `${this.redisns}${options.qname}`;
this._getQueue(options.qname, false, (err, q) => {
if (err) {
this._handleError(cb, err);
return;
}
this.redis.time((err, resp) => {
if (err) {
this._handleError(cb, err);
return;
}
const mc = [
["hset", `${this.redisns}${options.qname}:Q`, "modified", resp[0]]
];
for (let item of k) {
mc.push(["hset", `${this.redisns}${options.qname}:Q`, item, options[item]]);
}
;
this.redis.multi(mc).exec((err) => {
if (err) {
this._handleError(cb, err);
return;
}
this.getQueueAttributes(options, cb);
});
});
});
};
this._handleError = (cb, err, data = {}) => {
let _err = null;
if (_.isString(err)) {
_err = new Error();
_err.name = err;
let ref = null;
_err.message = ((ref = this._ERRORS) != null ? typeof ref[err] === "function" ? ref[err](data) : void 0 : void 0) || "unkown";
}
else {
_err = err;
}
cb(_err);
};
this._initErrors = () => {
this._ERRORS = {};
for (let key in this.ERRORS) {
this._ERRORS[key] = _.template(this.ERRORS[key]);
}
};
this._VALID = {
qname: /^([a-zA-Z0-9_-]){1,160}$/,
id: /^([a-zA-Z0-9:]){32}$/
};
this._validate = (o, items, cb) => {
for (let item of items) {
switch (item) {
case "qname":
case "id":
if (!o[item]) {
this._handleError(cb, "missingParameter", { item: item });
return false;
}
o[item] = o[item].toString();
if (!this._VALID[item].test(o[item])) {
this._handleError(cb, "invalidFormat", { item: item });
return false;
}
break;
case "vt":
case "delay":
o[item] = parseInt(o[item], 10);
if (_.isNaN(o[item]) || !_.isNumber(o[item]) || o[item] < 0 || o[item] > 9999999) {
this._handleError(cb, "invalidValue", { item: item, min: 0, max: 9999999 });
return false;
}
break;
case "maxsize":
o[item] = parseInt(o[item], 10);
if (_.isNaN(o[item]) || !_.isNumber(o[item]) || o[item] < 1024 || o[item] > 65536) {
if (o[item] !== -1) {
this._handleError(cb, "invalidValue", { item: item, min: 1024, max: 65536 });
return false;
}
}
break;
}
}
;
return o;
};
this.ERRORS = {
"noAttributeSupplied": "No attribute was supplied",
"missingParameter": "No <%= item %> supplied",
"invalidFormat": "Invalid <%= item %> format",
"invalidValue": "<%= item %> must be between <%= min %> and <%= max %>",
"messageNotString": "Message must be a string",
"messageTooLong": "Message too long",
"queueNotFound": "Queue not found",
"queueExists": "Queue exists"
};
if (Promise) {
_.forEach([
"changeMessageVisibility",
"createQueue",
"deleteMessage",
"deleteQueue",
"getQueueAttributes",
"listQueues",
"popMessage",
"receiveMessage",
"sendMessage",
"setQueueAttributes",
"quit"
], this.asyncify);
}
const opts = _.extend({
host: "127.0.0.1",
port: 6379,
options: {
password: options.password || null
},
client: null,
ns: "rsmq",
realtime: false
}, options);
opts.options.host = opts.host;
opts.options.port = opts.port;
this.realtime = opts.realtime;
this.redisns = opts.ns + ":";
if (opts.client && options.client.constructor.name === "RedisClient") {
this.redis = opts.client;
}
else {
this.redis = RedisInst.createClient(opts);
}
this.connected = this.redis.connected || false;
if (this.connected) {
this.emit("connect");
this.initScript();
}
this.redis.on("connect", () => {
this.connected = true;
this.emit("connect");
this.initScript();
});
this.redis.on("error", (err) => {
if (err.message.indexOf("ECONNREFUSED")) {
this.connected = false;
this.emit("disconnect");
}
else {
console.error("Redis ERROR", err);
this.emit("error");
}
});
this._initErrors();
}
_formatZeroPad(num, count) {
return ((Math.pow(10, count) + num) + "").substr(1);
}
_makeid(len) {
let text = "";
const possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
let i = 0;
for (i = 0; i < len; i++) {
text += possible.charAt(Math.floor(Math.random() * possible.length));
}
return text;
}
}
module.exports = RedisSMQ;