![]() ![]() The 6 revealing rules of queue psychology.A brief history of the psychology of queuing.What is it about waiting in line that tends to raise our blood pressure? What is it that differentiates a positive queuing experience from a poor one? The key is rooted in the psychology of queuing. The risk is ignoring queue psychology and delivering a negative experience that loses customers and damages your brand. The risk isn’t putting people in a queue. For businesses, it’s critical to make the experience a good one. What queue psychology shows is that the waiting experience makes all the difference. “Yet many are willing to wait for their favorite Black Friday item or the latest Apple gadget.” “People claim to hate wasting time,” says Queue-it co-founder Camilla Ley Valentin. Given the technical challenges of peak website traffic, lines serve the same useful purpose online, and aren’t going away anytime soon. ![]() Lines are a fair-if disliked-way to deal with high demand in the physical world. Many are startled to find that queues have moved online. But the Internet era has created assumptions that we can access whatever we want on-demand, 24/7. ![]() Everyone stands in line in the physical world. This means that a lack of feedback about success can be tolerated by the application as it can re-try the posting until it gets a 'success' message from the server.These two simple words can send an otherwise rational person into an uproar online. The idea is that conceptually one writes state rather than invoking a service, so one can write any number of times. IIRC, RESTFul services should be idempotent (the same state is achieved after any number of invocations of the same service), which is a strategy for dealing with this lack of guaranteed notification of success/failure in web service architectures. The application must be able to deal with this situation. The server can complete the service and fail to deliver a response (possibly through something outside the server going wrong). In the latter case, web services do not guarantee at-most-once semantics. Typically this will be through a reply to the request or timeout of the call. ![]() It is up to the client to validate that the service has been correctly run. It is a synchronous request/response protocol and has no guarantee of delivery built into the protocol. RESTFul API's) published by a (typically) HTTP Server. If the transaction is rolled back, Host A can assume that any effects of the message have been reversed.Ī web service is remote procedure call or other service (e.g. If the transaction is committed Host A can assume that the message has been delivered by the reliable transport medium. Note that A can post the message to the queue with the guarantee of at-most-once delivery. If B connects and collects the message before the transaction is rolled back, the rollback will also reverse the effects of the message on B. If the transaction was rolled back, this probably doesn't matter. In this case B will never be aware the message even existed unless informed through some other medium. This means that a message is guaranteed to be delivered with at-most-once semantics or guaranteed delivery if not rolled back. Examples of such systems are MSMQ and IBM MQĪ Transactional Queue can also participate in a distributed transaction, and a rollback can trigger the disposal of messages. This means that it must also be capable of persisting the message somewhere. A transactional queue is a middleware system that asynchronously routes messages of one sort of another between hosts that may or may not be connected at any given time. ![]()
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