qas/examples-nodejs-cqrs-es-swagger

A Node.js CQRS and Event Sourcing Microservice Example Using Nest.js, Event Store, and Swagger

examples-nodejs-cqrs-es-swagger's Issues

Another Aggregate Root

So far this is the most complete example of ddd+ event sourcing + cqrs I have seen for nest. Thank you 🙏

One thing I would like to see is how you handle more aggregate roots?

Do they each get their own folder like user?

Also as a side note I think user is a bit too all encompassing of a domain.

writeEvent not finishing

Hi,
I'm trying to play around the boilerplate code and understand how is working the eventbus structure, but I have problems writing to the eventstore.
I've tried to console.log the functions from commands, command handlers, till the event handlers, and I can see that code works well until needs to write to the store.

console.log('444', 'goes here');
const result = await this.eventStore.client.writeEvent(streamName, type, event);
console.log('5555', 'never is shown this message');

I'm starting the project from bash with up.sh script and everything is ok, project running on 7070 port.
One issue I have on windows 10 with docker running in daemon mode the evenstore, so I need to go to docker settings and to expose daemon on port 2375 without TLS, this was like workaround to start the eventstore.
But, everything is hook-up and i can see that the connection to evenstore is established.

{ protocol: 'http',
  hostname: 'eventstore',
  tcpPort: 2113,
  httpPort: 2113,
  credentials: { username: 'admin', password: 'changeit' },
  poolOptions: { min: 1, max: 10 } }
}

BR, Igor

deploy heroku

how to deploy in heroku ?

tks

TypeError: Cannot read property 'atom:entry' of null

Hi ,
This this is best and most useful example of CQRS event source project example.Thanks a lot for your effort
Anyway i have an error in onEvent()
const content = result['atom:entry']['atom:content'][0];
^
TypeError: Cannot read property 'atom:entry' of null

Some advices on the guideline

Your article is great to introduce basic concept of CQRS ES
However, i think most of the people are actually confused on following topics:

1. How to persistence data and query from it
2. How to replay events to restore the persistence e.g. DB
3. How to handle command failure
4. How to handle persisting error
5. How to work with domain more than 1 entity, e.g. Booking service that need to check existing records

Also, the detail of event Store should be added. Cause it will never work without the store.
E.g. Setup of Event Store by Docker
https://developers.eventstore.com/server/v5/server/installation/docker.html#run-with-docker

Compensation Sagas

Thoughts on adding more examples on compensation sagas? maybe with some things rolling back to previous state on failure?

Update to latest NestJS Version

Dear @qas ,
maybe you can update this example repository to the latest nestjs version? There are a few breaking changes, and it would be helpful to have a look at your example.

All the best and thanks for your time

Event Handler is not working

After i use create user command, it trigger command handler -> repo -> domain to apply userCreatedEvent, but then EventHandler can't catch the it and Saga also not work due to this