publish-subscribe

I want to use pub-sub messaging between multiple servers in a web farm to maintain their local (ASP.NET) caches in sync. Could this be easily done with SignalR? If it is possible, how can I do so? 来源： https://stackoverflow.com/questions/9449601/does-signalr-support-the-publish-subscribe-messaging-paradigm

Has anyone managed to integrate pubnub and head.js properly? Pubnub expect me to put their script at the bottom of the page with a <div> tag just before it. This ensures that the ` tag is completely loaded by the time the javascript is called last. The thing is, the rest of my application and pubnub are loaded through head.js so it keeps happening that the JS files are loaded before the pubnub subscribe/publish key and its subscribing/publishing to 'demo' rather than my own area of pubnub... Is there any example anywhere or way for me to just screw off this <div> element and pass in the

I've set up a simple test comprising a publisher with two subscribers, all running on a single machine using MSMQ and MassTransit (2.1.1) RuntimeServices which is using a local Sql Server database. I've included the Bus set up code below so you can see what's set up. I'm starting each component manually and independently to try to workout what happens if a subscriber ins't running. I ran the two subscribers first so the queues and subscriptions are all set up and then quit them both, without unsubscribing from the messages. If I then run the publisher on its own, which dumps 400 messages in

I want to do something like this: var events = require("events"); var emitterA = new events.EventEmitter(); var emitterB = new events.EventEmitter(); emitterA.addListener("testA", function(){ console.log("emitterA detected testA"); }); emitterB.addListener("testA", function(){ console.log("emitterB detected testA"); }); emitterA.emit("testA"); And the output to be this: emitterA detected testA emitterB detected testA But when I run this code, the output I get is: emitterA detected testA I basically want one emitter to listen to events emitted by another emitter. The Rationale: I'm writing a

I am building a distributed system that consists of potentially millions of clients which all need to keep an open (preferrably HTTP) connection to wait for a command from the server (which is running somewhere else). The load of messages / commmands will not be very high, maybe one message / sec / 1000 clients which means it would be 1000 msg/sec @ 1 million clients. => it's basically about the concurrent connections. The requirements are simple too. One way messaging (server->client), only 1 client per "channel". I am pretty open in terms of technology (xmpp / websockets / comet / ...). I am

This maybe a more general threading question i'm not sure. But I've got a WPF app that subscribes to channels and listens for messages from a redis database. App.SubscriptionThread = new Thread(() => { _redisSubscription.SubscribeToChannels("ChannelA", "ChannelB"); }); App.SubscriptionThread.Start(); Once I start this I have no idea how to stop it. Things I've tried. Using the Thread.Abort . This apparently doesn't stop it, as the thread just goes into a hang then forever (no unsubscription happens). Using the _redisSubscription.UnSubscribeFromAllChannels() from the UI thread. This also causes

I have several services in Azure and i would like to sync changes between them using some kind of pub/sub service. I am looking into Redis and Azure Service Bus. The data to be synced is very simple - mostly strings up to 100 characters I would like to know what is the preferred choice for me - or if i am in the right direction.. My requirements are simple: Low latency - Many small operations optional - be able to install the solution on-premise and not in Azure Don't use Redis for this. Redis PubSub isn't reliable (it's fire-and-forget ). What would happen if no one is listening when Redis