DDD/CQRS

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All discussions about ddd/cqrs/event sourcing/whatever are allowed.

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reda laanait, Yves Lorphelin2

Mar 24

How to fan in multiple streams for projections while maintaining a decent global order?

Well , the logic there is a bit special since it's about reading from actual multiple streams and

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How to fan in multiple streams for projections while maintaining a decent global order?

Well , the logic there is a bit special since it's about reading from actual multiple streams and

Mar 24

Feb 11

Re: [DDD/CQRS] Abridged summary of dddcqrs@googlegroups.com - 1 update in 1 topic

I'm sorry. I don't understand what you mean. Can you provide a concrete example? On Fri, Feb

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Re: [DDD/CQRS] Abridged summary of dddcqrs@googlegroups.com - 1 update in 1 topic

I'm sorry. I don't understand what you mean. Can you provide a concrete example? On Fri, Feb

Feb 11

Feb 10

change state of an aggregate root to simple object

Hello! I can't decide if the technique of moving the root of an aggregate inside another

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change state of an aggregate root to simple object

Hello! I can't decide if the technique of moving the root of an aggregate inside another

Feb 10

cybor...@gmail.com, Greg Young2

11/21/22

How to update read model schema

"I am thinking to create a new version of my existing projector and read from the beginning of

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How to update read model schema

"I am thinking to create a new version of my existing projector and read from the beginning of

11/21/22

David Leangen, … Alexey Raga11

10/10/22

Grouping events, like git?

I _believe_ something like that was done by Jet when they used Azure CosmosDB as an event store. If I

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Grouping events, like git?

I _believe_ something like that was done by Jet when they used Azure CosmosDB as an event store. If I

10/10/22

Holger Thiemann

10/4/22

Event Sourcing in deeply nested Aggregates

I try to keep it focused with an example: Pre ES: AR with: SomeMethod(parameters) //Validation //

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Event Sourcing in deeply nested Aggregates

I try to keep it focused with an example: Pre ES: AR with: SomeMethod(parameters) //Validation //

10/4/22

ant...@vinland.me.uk

4/30/22

JSON-LD and DDD

Hi there, Has anyone seen any use of JSON-LD as a way of annotating JSON API or message payloads -

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JSON-LD and DDD

Hi there, Has anyone seen any use of JSON-LD as a way of annotating JSON API or message payloads -

4/30/22

3/15/22

We built a framework 👀

We built a framework for CQRS and DDD even though Greg said not too. It's not too opinionated on

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We built a framework 👀

We built a framework for CQRS and DDD even though Greg said not too. It's not too opinionated on

3/15/22

Harrison Brown, Chris Sampson4

2/14/22

Using BDD with a system comprised of multiple services

The scenarios are most "business like" at the web UI level, and least "business like

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Using BDD with a system comprised of multiple services

The scenarios are most "business like" at the web UI level, and least "business like

2/14/22

radhakris...@gmail.com3

10/13/21

Services for a Banking domain

I think https://bian.org/wp-content/uploads/2020/07/BIAN-Semantic-API-Pactitioner-Guide-V8.1-FINAL.

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Services for a Banking domain

I think https://bian.org/wp-content/uploads/2020/07/BIAN-Semantic-API-Pactitioner-Guide-V8.1-FINAL.

10/13/21

nir.w...@gmail.com, Chris Richardson2

8/29/21

Event Sequencing in an Event Subscribing mechanism

Subscribe to the dynamoDb table's stream? On Sun, Aug 29, 2021, 2:55 PM nir.w...@gmail.com <

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Event Sequencing in an Event Subscribing mechanism

Subscribe to the dynamoDb table's stream? On Sun, Aug 29, 2021, 2:55 PM nir.w...@gmail.com <

8/29/21

Peter Hageus, Rickard Öberg2

8/17/21

ReadStore scale out

Hi Peter, This is such a great question I think. I can tell you how I did it (realvision.com), and

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ReadStore scale out

Hi Peter, This is such a great question I think. I can tell you how I did it (realvision.com), and

8/17/21

Alexey Raga, … Harrison Brown11

8/17/21

Aggregates creating other aggregates

Also related: https://foreverframe.net/how-to-guarantee-username-uniqueness-with-cqrses/ On 17 Aug

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Aggregates creating other aggregates

Also related: https://foreverframe.net/how-to-guarantee-username-uniqueness-with-cqrses/ On 17 Aug

8/17/21

peterm...@gmail.com, … Fabian Schmied3

8/15/21

Event Sourcing with AWS Services?

I'm not using AWS, but maybe this is helpful anyway. We're currently running an event store

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Event Sourcing with AWS Services?

I'm not using AWS, but maybe this is helpful anyway. We're currently running an event store

8/15/21

Alexey Raga, … Mateusz Nowak3

8/11/21

Commands, CRUD or CRUD commands?

Yes, exactly as Harrison said. Its good idea to separate part with business logic and rich model from

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Commands, CRUD or CRUD commands?

Yes, exactly as Harrison said. Its good idea to separate part with business logic and rich model from

8/11/21

radhakris...@gmail.com, Mauro Servienti5

8/9/21

Integration with external systems during sign-up

Thanks. Even though I can't use MassTransit it has many ideas related to my story. It will help.

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Integration with external systems during sign-up

Thanks. Even though I can't use MassTransit it has many ideas related to my story. It will help.

8/9/21

kho...@tdstickets.com, … Ben Kloosterman6

6/24/21

Implementing DDD Aggregates that have dependencies.

Hi Kurt You're looking at how a transactional /RDBS system with a company / Office table would

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Implementing DDD Aggregates that have dependencies.

Hi Kurt You're looking at how a transactional /RDBS system with a company / Office table would

6/24/21

Ryan Marsh, … Ben Kloosterman9

6/9/21

Orthodoxy of command validation

Thanks all for your input. This was very helpful. If anyone is interested I decided (for now) to

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Orthodoxy of command validation

Thanks all for your input. This was very helpful. If anyone is interested I decided (for now) to

6/9/21

Brent Roose, … Ryan Marsh5

6/9/21

Resizing Event Driven Aggregates

This answer was inadvertently helpful with a problem I'm having. Thanks. Kind regards, Ryan Marsh

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Resizing Event Driven Aggregates

This answer was inadvertently helpful with a problem I'm having. Thanks. Kind regards, Ryan Marsh

6/9/21

JGeek, … Ben Kloosterman3

6/1/21

System Decomposition From Business Requirements To Microservices

You didnt say DDD or Event driven ? Start with CRUD master data services which should be simple and

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System Decomposition From Business Requirements To Microservices

You didnt say DDD or Event driven ? Start with CRUD master data services which should be simple and

6/1/21

radhakris...@gmail.com, … Rickard Öberg12

5/24/21

Domain Events for UI

> So the followup question becomes: why is this preferred over using a load balancer to those

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Domain Events for UI

> So the followup question becomes: why is this preferred over using a load balancer to those

5/24/21

Alew, … Mateusz Nowak3

5/18/21

returning domain events

I'm using this approach a lot and it's very easy to follow, especially with functional

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returning domain events

I'm using this approach a lot and it's very easy to follow, especially with functional

5/18/21

Eusebiu Gagea, … Nik6

5/12/21

Please note, I see now it's a ES related question, where my answer is not. On Wednesday, May 12,

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Please note, I see now it's a ES related question, where my answer is not. On Wednesday, May 12,

5/12/21

BHP LIB, … Greg Young5

4/28/21

Seamless Object-Oriented Software Architecture (1995 Book)

Do you write purely functional code? Another question worth a discussion is ... how does analysis

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Seamless Object-Oriented Software Architecture (1995 Book)

Do you write purely functional code? Another question worth a discussion is ... how does analysis

4/28/21

Daniel Plainview, … Raoul Duke7

4/28/21

Event sourcing for articles (wiki)

what did google wave do? On Wed, Apr 28, 2021 at 7:12 PM Robert Mrobo <rober...@gmail.com>

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Event sourcing for articles (wiki)

what did google wave do? On Wed, Apr 28, 2021 at 7:12 PM Robert Mrobo <rober...@gmail.com>

4/28/21

radhakris...@gmail.com, … Ben Kloosterman7

4/26/21

Communicating multiple statuses of an aggregate using an event

>Dont really understand what you mean by this , is it because your using an eventually

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Communicating multiple statuses of an aggregate using an event

>Dont really understand what you mean by this , is it because your using an eventually

4/26/21

Joerg, … radhakris...@gmail.com15

4/20/21

How to implement Process Manager / Saga without ES and without Framework?

As far as the 'outbox' pattern is concerned there are architectural considerations. When we

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How to implement Process Manager / Saga without ES and without Framework?

As far as the 'outbox' pattern is concerned there are architectural considerations. When we

4/20/21

Caspar, … Ben Kloosterman8

4/7/21

How to get state of an aggregate in CQRS pattern?

"I think in an event-driven architecture the shape of the events ingested by a

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How to get state of an aggregate in CQRS pattern?

"I think in an event-driven architecture the shape of the events ingested by a

4/7/21

henk...@gmail.com, Ben Kloosterman2

3/31/21

Two aggregates, or one but with multiple views

At a glance stationconnector is not really an aggregate as i dont see it needing data options. Id

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Two aggregates, or one but with multiple views

At a glance stationconnector is not really an aggregate as i dont see it needing data options. Id

3/31/21

radhakris...@gmail.com, … Peter Hageus4

3/3/21

Aggregate state changes based on external Http calls

I looked at the difference between a saga and a process manager. But it looks like I haven't yet

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Aggregate state changes based on external Http calls

I looked at the difference between a saga and a process manager. But it looks like I haven't yet

3/3/21

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