nsq-client

An NSQ V2 client with HA-clustering and user-extensible message filtering/de-duplicating features implemented using native Buffer objects

NSQ Client for Node.JS

A simple implementation of the NSQ-V2 protocol using native Buffer objects, based entirely upon the protocol documentation found in Bitly's GitHub project.

Publisher/Producer examples/publish.js

var Crypto = require("crypto");
var NSQClient = require("../index");
var Util = require("util");
 
var client = new NSQClient({
  debug : true
});
client.on("error", function(err) {
    console.log("ERROR " + Util.inspect(err));
});
client.on("debug", function(event) {
    console.log("DEBUG " + Util.inspect(event));
});
 
var topics = process.argv.slice(2);
function randomishTopic() {
    var i = Math.floor(Math.random() * topics.length);
    return topics[i];
}
 
setInterval(function() {
    client.publish(randomishTopic(), { date : Date.now(), meh : Crypto.randomBytes(8).toString("hex") });
}, 50);
 
process.once("SIGINT", function() {
    process.once("SIGINT", process.exit);
 
    console.log();
    console.log("Closing client connections");
    console.log("Press CTL-C again to force quit");
    client.close(function() {
        process.exit();
    });
});

Subscriber/Consumer examples/subscribe.js

var NSQClient = require("../index");
var OS = require("os");
var Util = require("util");
 
var client = new NSQClient({
  debug : true
});
 
var channel = OS.hostname();
 
// Debugging Output
client.on("error", function(error) {
    console.log("ERROR " + Util.inspect(error));
});
client.on("debug", function(event) {
    console.log("DEBUG " + Util.inspect(event));
});
 
// Subscribe to topics defined on stdin
process.argv.slice(2).forEach(function(topic) {
    console.log("Subscribing to " + topic + "/" + channel);
    var subscriber = client.subscribe(topic, channel, {
        ephemeral : true
    });
    subscriber.on("message", function(message) {
        message.finish();
    });
});
 
process.once("SIGINT", function() {
    process.once("SIGINT", process.exit);
 
    console.log();
    console.log("Closing client connections");
    console.log("Press CTL-C again to force quit");
    client.close(function() {
        process.exit();
    });
});
  • MPUB
  • Clustered operation
    • Discover nsqd instances and available topics with the nsqlookupd API
    • Provide schemes for nsqd failover, message de-duping
Copyright (c) 2014 John Manero, Dynamic Network Services Inc.

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