Aggregated enterprise architecture wisdom
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We may distinguish six kinds of problem domains, to wit Simple; Entangling; Temporizing; Narrow; Precipitous; Location; These six are problem related principles connected with the scene. The architect who has attained a responsible post must be careful to study them. Simple problems Problems which can be easily understood by anyone is called simple. With regard […]
In this week’s Active Information post, I riff off a quote by Jud Valeski the CEO of Gnip, on the dearth of event-driven talent:
“Beyond infrastructure issues, as engineers, the web app programming we’ve been doing over the past 15 years has taught us to build applications in a highly synchronous transactional manner…”
“…You would be shocked at the ratio of engineers who can’t build event-driven, asynchronous data processing applications, to those who can, yet this is a big part of this space.”
If you are a frequent reader here, you’ve seen the event constructs I published over there.
One that I didn’t include is the fact that the absence of an event can be an event. Chris Martins brought that up on Twitter.
In my initial event writing, I wrote of a system heartbeat example:
“…a business-to-business order gateway is supposed to be emitting System Heartbeat events every 15 minutes. The System Heartbeat events inform IT operations the gateway is up and running. The absence of a heartbeat event indicates a failure. If the order gateway is down, business customers are likely to place an order with a competitor.”
On Twitter yesterday, I mentioned an event-driven billing subsystem I’m currently working on. In that system, we’ll be generating a (standard) projected monthly invoice. The invoice generation starts when the party is approved for billing.
Invoice regeneration is triggered by a set of events, including a change in plan, the receipt of a payment, or the absence of the receipt of payment. In this subsystem, the absence of a receipt is a non-payment event.
So, yes. The absence of an event is absolutely an event.
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One of these weeks I’ll catch up… Yes, iit’s the previous week’s collection of Tweets and links, sorted into the usual categories (or non-categories) and, of course, preceded by that all-too-necessary ‘Read more…’ link:
Enterprise-architecture and all the various ‘business big-picture’ themes:
SAlhir: RT @Jabaldaia Combining #innovation, #business and #art http://bit.ly/ebyrzD #entarch
SAlhir: RT @Digitaltonto Postcards from the […]
Listen to our recorded podcast on how to leverage advanced concepts in TOGAF® for business benefits, or read the transcript. This podcast was recorded by Dana Gardner of Interarbor Solutions in conjunction with The Open Group Conference, Austin 2011. …