JHipster - How to debug in Eclipse only one gateway (or microservice) in a microservices architecture?

Question

Assuming that with JHipster I've generated: - 1 Gateway (with MongoDB + JHipsterRegistry) - 3 Microservices [called A, B and C] (with MongoDB + JHipsterRegistry)

I'm using maven.

I've composed all in Docker, so the resulting Docker configuration is:

• 1 JHipster Registry
• 1 Gateway
• 1 Gateway MongoDB
• 1 Microservice A
• 1 Microservice A MongoDB
• 1 Microservice B
• 1 Microservice B MongoDB
• 1 Microservice C
• 1 Microservice C MongoDB

All works fine: from the Gateway I can see entities from each Microservice.

Now I need to implement some features on Gateway (UI pages etc), and I need to debug with Eclipse during development.

How can I achieve this?

A) Do I need to run all manually, so running:

• all components manually with ./mvnw
• the JHipsterRegistry from a .jar
• the Gateway from Eclipse running the debugger executing the main Application

B) Or can I use somehow docker for all "static" components and run only the Gateway from eclipse?

C) Any other suggestion?

If (A):

• I need to start also all MongoDB manually?
• How?
• May the used ports collide?
• Do I need to change configurations?

If (B):

• How to run all "static" components in docker?
• How to configure the Gateway to reach other components?

Answer 1

I did something similar as follows, duplicate your docker-compose directory
create docker-compose-dev

edit the new docker-compose.yml remove the gateway service

edit your hosts file create an entry as follows:
127.0.0.1 jhipster-registry

run this setup docker compose up -d
It should start without issues then you can run your gateway
from the command line terminals using mvnw and npm start