Questions tagged [microservices]
Microservices are small, independent processes that communicate with each other to form complex applications which utilize language-agnostic APIs. These services are small building blocks, highly decoupled and focused on doing a small task, facilitating a modular approach to system-building.
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Microservice Architecture in Azure - Ideas for improving performance
We are about to develop a microservice architecture with azure functions inside azure. We thought about using interservice communication with durable functions.
On app site we want to use an async ...
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2answers
32 views
Single micro-service for event-based & time-based notification scheduling [on hold]
We need to send emails and SMS to users which will be triggered by an event like a value change in the database or insertion of a row into the database. Sometimes its time-based trigger like sending ...
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31 views
Which OAuth2 Flow?
I'm just getting into OAuth2 and I'm a tad confused (you've probably heard that before)!
I am writing a small independent service which will expose a basic REST API enabling client applications to ...
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1answer
35 views
How to deduplicate messages coming from having multiple instances of the same observer
I have a web application that is currently of some different services, one instance each.
My current goal is to scale some of my services to ensure fail over. One big problem I foresee is that a ...
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1answer
55 views
Keep Hitting 3rd party API or Store Commonly Queried Data In DB?
Colleague and I have begun a long (and hopefully fruitful) project. I've been building and have come to my first crux, and now I ask the experts of the Stack Exchange for their guidance.
I'll keep ...
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1answer
43 views
How to solve cache eviction when not using distributed cache in microservices?
Let's say we will not use distributed caching because we want that our microservices are independent and they do not have many single point of failures. Either we will have in-memory cache (simple ...
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1answer
30 views
Robust locking mechanism between n service instances
I have a job that runs every hour. There can be n identical Node.js microservices running in a stack. The job must be executed only once per hour, though, so I've implemented the following locking ...
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1answer
62 views
Why do some eShopOnContainers Service API Unit Tests not reference API classes only WebMVC? [on hold]
I have been trying to learn more about MicroServices architecture and I am using Microsoft's eShopOnContainers as a reference because I am familiar with .NET. I am getting into the part about testing, ...
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39 views
Better approach of testing groups of small services with or without dependency injection
Let's assume, that frameworks I use, provide some kind of dependency injection automatically available in testing environment.
Let's also assume, that I have a lot of micro services in my application....
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0answers
24 views
Asp.Net Core: creating files in background
I have a web app with SPA client. When user requests a report, that request should create an excel or pdf file in background and notify user via SignalR. I guess I need to save that file somewhere ...
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0answers
37 views
Breaking a monolith into microservices using templates for similar apps
I have a huge monolith application, a ASP.NET MVC Framework service offering ~50 different "groups" of unrelated data, separated into 50 different controllers/business logics. I was tasked into ...
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1answer
51 views
Scheduling operations in a micro service
I'm trying to realize a service that executes operations at a certain time, those operations are specified by another service by messaging, here's the scenario:
The service A receives a request to ...
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0answers
20 views
AWS Step Functions for a synchron Lambda call from another Lambda
I'm trying to understand AWS Step Functions... so far I understand it as an orchestration among AWS Lambdas in case of distributed processing of a complex task: "Do this, then that, then wait, then ...
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0answers
90 views
Where should the API reside?
I have a microservice(opsApiServ) which hosts API to do operations(ops).
/ops - POST, GET
/ops-item - GET
ops-item is just a single unit of operation, and ops is collection of operations (ops-item).
...
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0answers
43 views
How can I stop storing user data twice in two separate services
So I have two services that run, each with their own database. S1 stores user information and other primary data. Users also login and signup via S1 endpoints. S2 stores the same user information and ...
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1answer
55 views
Microservice on top of an API
I have an Odata API server that I can't change only access it, I can do CRUD operations on it. However I'd like to authenticate users, that are stored on this server. I can retrieve a user (his email, ...
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4answers
185 views
Splitting application into multiple but keeping database same
I have a medium scale e-commerce application. Over a period of time our monolithic project got quite heavy in terms of code base. I was exploring the solutions for it and found micro-services is one ...
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0answers
47 views
Migrating monolith application into microservices database [closed]
I am migrating a huge application into a microservices based architecture.
For that purpose, I am using springboot, with microservices that will be deployed into a kubernetes system.
Right now, in ...
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1answer
35 views
should we consider a feature set as a microservice in FDD?
We are designing the software based on the FDD (feature driven development). Our architecture is microservice. I want to know that microservices are demonstrated by the feature set? In other words, is ...
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1answer
27 views
Event sourcing access by reference
In an event sourcing architecture, what is the typical pattern for passing information about related objects (aggregates)?
For example, in a order processing system, should OrderCreated event (...
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1answer
97 views
Clean Architecture and Microservices
Our team is in the planning stages of creating an enterprise solution for our back office. Our goal is to have one singular entry point for common tasks, such as changing an address or reprojecting a ...
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0answers
50 views
Data replication in microservices
We are trying to move from a monolithic architecture to a microservice architecture. We thought of what would be the best way to segregate our services and started doing so one by one. Now we have a ...
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1answer
71 views
How to synchronize databases using event streams?
Say you have a bunch of microservices each accessing dedicated databases. Due to business logic reasons, data from some DBs need to be replicated to other DBs (e.g. to serve as local cache).
One way ...
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1answer
69 views
In a multi-tenant micro-service architecture, who stores the account IDs for each tenant?
I've been doing some research on multi-tenant systems and micro-services and I'm a bit confused by this.
If each micro-service has it's own database, and implements the support of multi-tenancy in it'...
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2answers
59 views
Data Replication Across Microservice Domains
One of the architectural challenges we are facing on a project is ensuring data consistency over our microservice domains. We have two rules that we are trying hard to enforce: 1. Services cannot ...
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1answer
32 views
How to serve the front-end in a Spring microservice architecture?
I want to create the following distributed system: Spring back-end microservices containing the domain logic, a UAA (authentication) service, a Eureka service registry/discovery, a Spring Cloud Config ...
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26 views
Microservice auth layer vs each service authorizing requests?
I approached our architect with a solution in which all of our microservices verify the auth of the user invoking the call. Basically, what I've been doing for years, on different projects. He ...
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0answers
54 views
Is my microservices architecture in line with best practises? (STS/SPA/Frontend API/Backend services)
My goal is to make an application with a SPA front end that updates in real time, incorporating microservices architecture (and for solutions CQRS design patterns and eventing with Azure Service Bus).
...
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1answer
64 views
Confused about commands, domain events and external events in event sourcing
I'm a little confused about
commands role in event sourcing
distinction between domain and external events
If my understanding is right
a command represents an action initiated by an actor in terms ...
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0answers
102 views
How to handle shared data across microservices?
At my work we have a typical microservice architecture, but one of the issues we are running into is sharing data across multiple services. We have certain data that is used by multiple services and ...
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0answers
88 views
What are the design patterns and supporting technologies for sharing complex objects between microservices?
Question: Given that two services operate on a common complex object, what are possible design patterns and supporting technologies of exchanging the object and (possibly) sharing the implementation?
...
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1answer
84 views
.NET Core Microservice messaging with Amazon SNS and SQS
So I've done some searching but can't seem to find a whole lot of suggestions on this topic. My question is what are some opinions on the best way to receive messages from an Amazon SQS queue on a ....
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1answer
56 views
is Event sourcing using Database CDC considered good architecture?
When we talk about sourcing events , we have have a simple dual write architecture where we can write to database and we can write the events to a queue like Kafka . Other downstream system can read ...
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0answers
78 views
Authorization, permissions, and scoping resources in a microservice/DDD architecture
I'm building a microservice-based application (services according to DDD) and am about to implement authorization service. There are API gateways and UI applications that access backend servers, and ...
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0answers
39 views
Dynamically start containers to isolate code compilation / running
I'm building a system where I need to measure certain algorithms, which are written by the end users. Obviously running external code is a huge security risk, therefore it needs to be isolated. The ...
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1answer
116 views
How to structure microservices in your repository
I am assigned to a project where we have about 20 micro-services. Each of them is in a separate repository without any references to any other, apart from one Nuget package where we maintain some ...
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0answers
31 views
How should propagation of service abuse information work within a microservice architecture?
At the moment, I'm working on a product that's being broken down from a monolith to a bunch of microservices, and it seems to be going well enough.
However, if a user is abusing the service somehow, ...
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0answers
34 views
Advice on how to model my microservices
I need to tackle this problem : we have to model some services aimed to handle all our customer registration process :
- this include registration of the personal data (name,surname,email whith a ...
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0answers
79 views
How to handle role based access in my microservice architecture
We are trying to move from a monolith application to a microservice architecture faced by a spa application. One of the reason, is that we want to expose some services of our business to partners and ...
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3answers
171 views
How to integrate different “microservices” into a transaction?
We're building a new web-based industrial application and one of the questions that are hammering our heads for the last few days is about the integration between different "microservices" on this ...
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1answer
154 views
Why read and write API are good or why not?
While designing a complex system some of my colleges came back with the idea of having two separates APIs, one that will perform the writes into de databases and another one that will only do the ...
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0answers
39 views
Message Broker in Client-Server-Applications
I'm currently planning an architecture for a system that should consist of multiple microservices. We definitely want to make use of a message broker (probably RabbitMQ).
A simplified diagram of my ...
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1answer
34 views
Should complete user story be implemented by one team in context of microservices archicture
I have implemented application using microservices architecture. I take a user story to implement. This involves front end/UI, and two microservices to implement the user story. So I have three ...
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1answer
92 views
Where to store data for Microservices Architecture?
I currently build applications that are fairly monolithic. I have a one or many code bases that compile into one single binary/package and deployed on a cluster of docker containers. All of the data ...
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3answers
530 views
Where should business logic sit in microservice architecture?
Still trying to wrap my head around microservice architecture since I'm used to a monolithic approach
Suppose we try to build a extremely simplified Uber booking system. To simplify things we let's ...
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1answer
40 views
Querying in event driven microservices
I am trying to get my head around "event driven" microservices. I understood, there are several techniques and patterns, like event notification, event sourcing, CQRS, etc that can help us to achive ...
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1answer
34 views
Any patterns for extracting tooling from multiple repositories?
I'm working on a project where an increasing number of small mini apps all share nearly the same tooling - makefiles, dockerfiles, jenkinsfiles and webpack configs, along with a couple of scripts, are ...
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2answers
115 views
Multiple processes in single microservice
We have a microservices architecture very similar to the architecture described here
Obviously, it's a simplified diagram of a real system. In our case, we have a requirement to perform background ...
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1answer
169 views
Service Bus or Event Stream for Event-Driven Architecture
I'm creating a set of Microservices following Event-Driven Architecture using Event-Carried State Transfer to move state from one service to another.
Given the following services;
Order service
...
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2answers
213 views
How to scale horizontally a microservice that holds a database
Imagine a 'User' microservice that holds all user's related logic, and this microservice holds a database.
How could you scale this microservice horizontally and keep consistency ?
In fact, if you ...
