I am in process of coming up with a multi-region high availability (active-active) architecture for my product. A simplified version of our stack is that we use Lambda to implement our micro services, which are exposed as APIs using API…
I'm a beginner developer and I have problem with implementation of BloC framework. Let's assume that I have this code (Model, NetworkService, Repository, Cubit, State, Widget): class NetworkService { Future getData(Uri uri) async { try { http.Response httpsResponse = await…
The central database(blue) will hold all customer data of the project. The local databases(green) will be deployed at the physical locations containing a copy of the customer databases. Multiple stores can be deployed across geographical areas (A, B,...N) to allow…
We have an application that does lot of data heavy work on the server for a multi-tenant workspace. Here are the things that it do : It loads data from files from different file format. Execute idempotence rules based on…
I am running a finance related web portal which involve millions of debit credit transactions in MySQL , getting the balance of a specific user at a certain limit i.e. with 3 million rows becomes slow. Now I am thinking…
Say I have a service that manages warehouses(that is not very frequently updated). I have a sales service that requires the list of stores( to search through and use as necessary). If I get the list of stores from the…
We have decided to introduce Redis to our microservice system as a distributed caching and in memory database. The initial decision is to create a service wrapping Redis, and a Client library will be created for other services to consume…
As I understand Mongo DB supports Blob storage, However from System Design Perspective Is Mongo DB a good choice to store Blobs (Like JPEGs, Doc, and Video) files? What could be the technical pros and cons of using Mongo DB…
An ex-employee planned a Microservice Architecture which is being implemented now. I've few question regarding the design and I'd highly appreciate your feedbacks. Explanation Dematerialized UI has a matching dematerialized API. Dematerailized API validates the user and generates token via…
Let's image that we have a simple endpoint called CreateEntity in some .NET Core controller and we have two services which saves the entity to the Mongo and Neo4j databases (in this particular order). I want to implement some pattern…