Process manager in event sourcing
There is a pattern which can be used to orchestrate collaboration of different aggregates, even if they are located in different contexts/domains. This patters is called a process manager. What...
Business Driven Development
If you’re into software development you’ve probably heard about Behavior-driven development. Recently I had a discussion whether or not business people think in this way. Fortunately, I was involved in...
CRUD chat
A: Hello, have you CREATEd a new car? B: No! I just UPDATEd its Owner field, setting it to my id. I needed to UPDATE the balance field of my...
Optimisation of queries against event-sourced systems
I hope you’re familiar with event sourcing pattern. Switching from update-this-row to a more behavioral paradigm in designing systems, that’s one of the most influential trends for sure. But how,...
Cacheable REST API for time series
I’s been a while since last blog post and mapping back the blog domain. Let’s restart with something fency: REST API!
Latency vs throughput
There are two terms which you should consider during designing your system. The more robust, the bigger system you design the deeper should be your understanding of these two values....
Storm processor - bolts and joins
Storm processor, recently moved to Apache foundation is a powerful stream processing library open sourced by Twitter. It provides needed resources to scale out the processing across multiple machines, providing...
Application deployment: multi nuget based vs custom deployment package
So far I encountered a few patterns for deploying application. Speaking of those based on nuget packages, I can easily distinguish two of them.
Queues and threads of your organization and work in progress limits
This will be a tale of two organizations.
Pearls: EventStore transaction log
I thought for a while about presenting a few projects which are in my opinion real pearls. Let’s start with the EventStore and one in one of its aspects: the...