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Questions - cqrs

How Implement CRQS in DDD

If someone tries to implement the CQRS pattern without repository in DDD, in which layer should it be done? Infrastructure or Application Layer?
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Mamink

repository

domain-driven-design

cqrs

clean-architecture

Votes: 0

Answers: 1

Latest Answer

If you mean the implementation of the handlers of the queries and commands, it's done in the application layer. But you need a repository to abstract the technological implementation outside of use ca...
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Jackmekiss

Why are read-only nodes called read-only in the case of data store replication?

I was going through the article, https://learn.microsoft.com/en-us/azure/architecture/patterns/cqrs which says, "If separate read and write databases are used, they must be kept in sync". On...
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Arvind Kumar Avinash

serverless

cqrs

database-replication

sharding

transactional-replication

Votes: 0

Answers: 1

Latest Answer

All of these have "it depends"-like answers... Yes, usually, although some implementations might choose to (try to) update read models transactionally with the update. With multiple nodes ...
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sellotape

CQRS pattern - need to read data when processing a command?

I'm practicing the CQRS pattern and I can't understand it. I need to execute a command to create an entity, which in turn has navigation properties. It turns out that when creating, I request data fro...
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Pavel

c#

asp.net-core

cqrs

Votes: 0

Answers: 2

Latest Answer

TL;DR there's nothing wrong with reading from the a persisted data store / source of truth (e.g central database) when you execute Commands (C) e.g. transactions in a stateless design. Its the Read (Q...
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StuartLC

MediatR Issue : Error while validating the service descriptor 'ServiceType: MediatR.IRequestHandler

I'm using .Net Core 3.1 and MediatR framework/library for query objects. While executing the webApi\endpoint, I am getting the below issue Some services are not able to be constructed (Error while v...
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jAntoni

c#

.net-core

cqrs

mediatr

Votes: 0

Answers: 2

Latest Answer

Check your Persistence project, you will see a RepositoryRegistration class in the Extensions folder. You should register your repository there like this: public static void AddRepositories(this IServ...
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Javier

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