call 2 services

[abstract zenith]

Hello everyone so i would like to call internal between 2 services independent connect with @frank kestrel/microservices

[smoky halo]

what do you mean call internal?
are those two services located in a single application?

[abstract zenith]

I mean , I have api-gateway like message broker , product services is one of service in micro, and category service , in products I want get all info category service to map with table in product filed

[abstract zenith]

But I don't know how to call data between 2 services

[smoky halo]

I'm not sure if I follow

with dependency injection you can call services from elsewhere, is that what you're looking for?
https://docs.nestjs.com/providers#dependency-injection
or do you want to call services that are located in another application via a microservice transport layer?

[abstract zenith]

Yes i would like call services from another application via a microservices,

[smoky halo]

what transport layer do you use?

[abstract zenith]

Rabbitmq

Table products services have 3 field name , description , categoryID from service A

Table category have 3 field id name description in servjce B

2 of theme is 2 services independent in microservices

I would like to call data from service B to A to mapping data return fe

But i don't know to call internal between 2 services

🥲🥲🥲

[abstract zenith]

Example like this

I don't know call get all data order to mapping table in services products

Do you have any ideas??

[smoky halo]

that's the disadvantage you get with microservice architecture, you cannot paginate and at the same time join/map the data across microservices/domains

it's a complex design problem that can be solved but with greater cost

https://rafaborrego.co.uk/how-to-do-pagination-across-domains-in-microservices-architectures/

[abstract zenith]

Yes I read a lot article but don't say about relationship between 2 services

[smoky halo]

the best you can do is keep everything isolated and forget about aggregating the data on the backend

let the end-user (clients) decide what they want to see by sending multiple requests to the backend

[abstract zenith]

Thank your support 🥹🥹🥹

[abstract zenith]

Using CQRS to implement call between each service