![]() ![]() For system topics, you’ll see subscribers as sub-resources of the system resources you’re subscribing too (sort of like queues within a Service Bus namespace). If its a custom topic, you’ll see them listed as sub-resource objects of the custom topic they belong too. Where you “see” subscriptions as Azure resource objects, depends on the type of topic they are associated with. A subscription provides the filtering criteria describing the events you want to receive and the endpoint you want events that meet those criteria to be sent too. To get the messages, you create subscriptions on the topics. To loop back on the early message, the topic is an input endpoint, and the subscription are output endpoints, the grid is in the middle doing the plumbing between the two so you don’t have too. If you want to publish your own events, you can create a custom topic and you’ll be able to see and manage the custom topics as you would any other Azure resource. ![]() They are “just there” and managed by Azure for you to use if you so desire. System topics are “just part of Azure”, so there’s no need to create them and you won’t see them in the portal. Azure storage, Azure Subscriptions, Events Grid already provides system topics and more are on the way. System topics are created and managed by the various Azure Services. Topics come in two varieties, system topics and custom topics. For a more detailed breakdown of the differences, be sure to look at the official documentation. Instead it does it’s best to retry delivery periodically before the message is finally discarded. And unlike Event Hub, its not a long term buffer. Unlike queues and Azure’s Event Hub, grid subscriptions don’t need to be polled, instead they use a message pump approach to push events to a predefined endpoint (usually a web hook). It has topics to which events are published, and subscribers that allow you to get those events with filtering so you only receive the events you want. OverviewĪzure Event Grid (we’ll just call it “ the grid” for short, and because I’m a Tron fan), conceptually, can be thought of as a model for publishing, and consuming events using a pub/sub model. So I wanted to put my own version of what this service is down in writing. ![]() So if I was confused by this at first, I figured there have to be others that might have similar challenges. I’ve never claimed to be the smartest guy in the room, but I think I’m fairly savy. This caused me a bit of confusion at first. For all purposes, its just part of Azure. In Azure, you create a database, a virtual machine, a queue, etc… but there’s no creating a “grid”. This new service, the Azure Event Grid, is unlike anything else that exists in Azure, for one simple reason… its part of the “fabric” that is Azure. On January 30th, Azure launched a new service that, at least in Azure terms, represents a bit of a paradigm shift. ![]()
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