I am using Kafka for Event Sourcing and I am interested in implementing sagas using Kafka. Any best practices on how to do this? The Commander pattern mentioned here seems close to the architecture...

I'm developing my insight about distributed systems, and how to maintain data consistency across such systems, where business transactions covers multiple services, bounded contexts and network bou...

I was looking in to event base architecture and came to know about two architecture Event Sourcing & Event Driven Architecture. My understanding is following Event driven : used for distribute...

Problem In redux-saga, I am using yield delay(1000);. During my unit test, I do expect(generator.next().value).toEqual(delay(1000));. I expect the test to pass. This is my sagas.js: import { de...

I would like to clarify what'd be the best way of organizing architecture. I've got rest api and microservices architecture. I have applied the Database per Service pattern. So let's imagine tha...

On multiple sites (e.g. here or here Sagas are described as a mechanism that listens to domain events and reacts to them, executing new commands, and finally modifying the domain, etc. Is there an...

I want to pass action.url string as a parameter of topicDummy function which return Promise, but It keeps show me No overload matches this call. The last overload gave the following error. Arg...

I have gone through various SAGA patterns(Orchestration,Choreography), suggested for maintaining database consistency in microservices during distributed transactions. But I am not able to relate t...

These days I am researching the Microservice inter-service communication patterns. So during my research, I found that there are two patterns called SAGA and event sourcing. But I couldn't find a r...

I want to use SAGA pattern in my Spring Boot Microservices. For example in order of customer, when the order created, an event like OrderCreatedEvent produced and then in customer microservice the ...

I need to handle distributed transactions in a microservice architecture. In theory, one of the best ways of doing that is using the Saga Orchestration pattern. The problem is I could not find any ...

I'm using a Redux Saga template and it uses generator functions that contain instances of yield call(). Basically it looks like this: function *a(){ yield call(<some function>); } yield ta...

I Have an app on react native. Debug mode works on ios. But Release mode not works. I tried change the optimization level but not helped. The problem that I don't see any error. Just not working so...

everyone. I test saga with jest framework. I can test my saga in normal situation. But I want to test the code in catch(), so I have to mock a error to trigger catch. I find some solution in redux-...

I have 2 microservices S1 and S2. S1 invokes S2 to update a data and then S1 inserts another data,But let's consider S1 fails,Then we need to rollback the data updated by S2 or else we'll be in inc...

Given the following code, I am getting an undefined result back from my yield call. Why is this happening? I am thinking its something with my request function. Not sure why. In my saga file, this...

Jimmy Boagard describes a McDonalds fast food chain here comparing it to a scatter gather pattern. Workflow image stolen from above article: Initial Implementation Thoughts: To have a common i...

I am trying to understand different methods used in messaging between services. Let us say that I have a scenario where I need first service to notify the other that a user has asked for product c...

I have defined the following state machine in Masstransit: public class OrderStateMachine : MassTransitStateMachine<OrderState> { public OrderStateMachine() { InstanceState(x => x.Stat...

I have written an Event Sourced Aggregate and now implemented an Event Sourced Saga... I have noticed the two are similair and created an event sourced object as a base class from which both derive...

I'm trying to understand sagas, and meanwhile I have a specific way of thinking of them - but I am not sure whether I got the idea right. Hence I'd like to elaborate and have others tell me whether...

What exactly is the difference between workflows and sagas? What are the pros and cons of each? Thanks!

Let's say I wanted to have a saga that get's created by some event, then sits and wait for a few hours, and if nothing happens, sends off some command. Now, if this Saga was all in-memory and I ha...