Questions tagged [event]

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Domain Events Grouping/Buffering

Suppose I have 3 domain events, Event1 Event2 and Event3. When command arrives at my Service Layer, I can rise 2 commands at the same time - e.g. Event1 and Event2. One Class has event listener for ...
2
votes
2answers
303 views

Aggregation and storage system design for user event processing?

I have a eCommerce like system which produces 5000 user events (of different kind like product search/product view/profile view) per second Now for reporting business users would like to view the ...
1
vote
1answer
208 views

Alarming on event driven systemev

How to define overall monitoring of event-driven architecture? Each component talk to other component via events. Consumer(s) react to events within minutes to days based on use case. Each component ...
0
votes
1answer
77 views

How to subscribe to collection edits happening in a different thread?

I'll be using C# for my example since this is what I am using, but the problem is sort of generic. My app code takes a collection of Foos (externally populated and edited) to do some processing, and ...
0
votes
0answers
29 views

Experiences with coarse grained and fine grained message designs in an ECST pattern

I am currently facing a dilemma in the design of a message oriented distributed system following an Event Carried State Transfer pattern. This is essentially a "near real time ETL" used to ...
0
votes
0answers
108 views

WPF MVVM EventAggregator Cons?

We have a wpf mvvm application with a lot of "panes". Just like the draggable panes in visual studio for example. All of these are individual usercontrols with their own viewmodels and im trying to ...
0
votes
3answers
152 views

How to implement a chain of events on a tree's CRUD operations?

I am working on a project in which I have a tree with 4 layers and the hierarchy is like this. Customer -> Site -> Location -> Guardroom In DB each entity has its own table and the child ...
0
votes
1answer
568 views

How to ensure persistence in an event-driven microservice architecture?

Right now we have a set of micro services with a client-facing gateway responsible for authentication and routing. MySQL database and RabbitMQ for the message queue. Internal services may queue up ...
0
votes
0answers
65 views

Event and Objects

I have an array of objects. Instead of me when performing a task asking every object If they have anything to say about that, I would rather like the following: Perform Task Object #4 Hey, I have ...
-2
votes
2answers
77 views

How to call the API once per event-message?

I have X number of servers in NLB listening to an event that gets published by a backend system. I am planning to develop a windows service that listens to the event and then calls an internal API. ...
-2
votes
1answer
62 views

Name for object to re-order events received in arbitrary order?

I have a program which generates events. They are ordered with a Lamport clock and sent over the network. They may arrive in a different order. On the receiving end I have an object which re-orders ...