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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When would you consider sharing a database to be fine? What are your rules?
When would you consider sharing a database to be fine? What are your rules?
Our team in-charge of in-store credits.
We:
Calculate how much credit the customer earned
Keep track of how much credit the ...
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Child Entity or Aggregate Root?
I have to design a part of a system in responsible for creating tickets for attractions and then sell them. Basically there are
three different parts:
Product: to create the tickets for sale for each ...
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Is service discovery an anti-pattern?
We deploy microservices in Kubernetes environment.
For providing a solution to a business use-case using microservices,
Is the idea of service registration and service discovery not an anti pattern? ...
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E2E tests and fan in build pipeline
In chapter 9 (Testing) of the book Building microservices (2nd edition)
Author suggests using a Fan-in approach to have a single shared E2E tests for all microservices. This way tests of unchanged ...
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Microservices architecture for spring boot application
I have a Spring Boot application which is containerized. The application has become huge with lots of complications and its difficult to maintain it. So I am thinking of breaking it into microservices....
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How to provide user id to proxied services in an API gateway pattern?
I'm making code examples of how to start a modern microservices web architecture from scratch, and I only recently learned about API gateway pattern. So far, the authentication methods I used for ...
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Architecture Design using Queue and JWT Token for session management
I am planning to design a microservice system architecture for a ticketing platform. It will be similar to "TicketMaster". Here is the flow of my architecture:
client web browser
API ...
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Exposing DB table to other Microservice via a Library
Consider I have 4 Services .
Account
Order
Items
Customer
Now a External Partner Service calls all these services , by passing an External customer id ( EXT_CUST_ID) in the request.
Our platform has ...
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Access Token Or Alternative for Microservices For Resource Level Granular Checks
Hi I have following structure :
Client App (layer 1)
Business logic Services ( Layer 2)
Business Logic layer consists of many microservices . Access token can be created and passed from APP layer to ...
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Clean Architecture with Microservices
I'm fairly new at system architecting and I'm looking for some advice. My company is revamping its order management system. Currently is a monolith system that scales very poorly and is difficult for ...
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Can chatty microservices be okay to use if there is a specific use case for them?
Introduction
Hi everyone,
in my company we are using microservice approach and of course are trying to do it as correct as possible. There is a new requirement coming up where I have laid out a ...
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How to build REST uri that fetches children by parent ID
I am building 2 REST microservices: ParentService and ChildService. I need to build endpoint to fetch all Child resources related to specific Parent, so I have these URI's as options:
GET /parent/{...
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Microservices messaging and coupling [duplicate]
So I am designing some microservices that communicate via messaging and event queues.
However, if I update a message class, for example remove a field, this will break several participating ...
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Designing a microservice architecture
I am looking to enhance my skills in back-end technologies and would need your help in setting up a scalable microservices architecture.
Here's my project.
I have N sensors that send me data (Pressure,...
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Can multiple producers cause events with the same key to be enqueued out of order within a specific partition of a topic?
I'm aiming to create a simple event-driven system where each microservice operates with its own database. The idea is to share database changes across microservices through events. To ensure proper ...
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Centralize input validation across multiple Microservices
My company, which specializes in logistics and transportation, delegated the majority of the backend microservices to our team. All of the microservices (which our team inherited from "past ...
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Using a single Postgres server process to manage multiple databases in a microservice application
One of the main guidelines I keep seeing for successfully building a microservice application is to use a separate database for each microservice. In diagrams these are usually depicted as physically ...
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When should we separate common parts of multiple services into one separated service
We have some services (consider 10, some of them already exist and some are yet to come). All of these services have a common part where they keep track of what's being changed, and these so-called &...
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Can the Enterprise Service Bus in SOA be replaced by multiple service bus implementations and still be SOA?
When and Service Oriented Architecture (SOA) is designed, and the ESB is changed to multiple independent service busses that talk to each other (pub/sub), does the architecture cease to be SOA? Is it ...
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Using messaging and rest to communicate services at the same time
I have two microservices, USERS and PRODUCTS, the second one creates objects referred to first one so it needs first to check that exists
First I though in a redis cache, but then I realize that for ...
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JWT Cookie and API Gateway
Background
I have an authentication microservice that handles the user authentication and returns 2 JWT cookies (access_token and refresh_token).
I want to incorporate an API gateway that does the JWS ...
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Why do Streamlit applications often consume a FastAPI backend?
I am fond of writing Streamlit applications (when a front-end is needed) and fastAPI backends when I just need a REST API.
I've seen many blog posts where these two are combined - with the Streamlit ...
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Single api gateway or one for each microservice
We are going to have multiple microservices and decided to use api gateway. What we couldn't decide is if we should go for a single gateway for all of them or one for each. The reason why one for each ...
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How to write custom implementation of a service/flow for a tenant in a multi-tenant microservice system?
I have a Java Spring boot microservice in production which supports multi-tenancy and the tenants are isolated at database level. This microservice exposes REST APIs for communication. During a ...
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Does it make sense to create a new service to house multiple features that are related business-wise but tech-wise independent?
We are beginning to add third-party integrations that all have to do with a certain business concept. (If it helps to make things concrete, in our case it's "measurements," i.e. third-party ...
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How do you handle using same data in different microservices
We have a microservices application and our User management service is the source of truth for user's first and last name. But we also need these in the Reporting service, where we generate reports ...
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Which comes first: CD/Trunk-based development or microservices?
My company* wants
to move from using long-running feature branching (~up to a few weeks) to continuous integration with trunk-based development, and
to break up our monolith into microservices.
We'...
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Using a shared enum across 15 nanoservices [closed]
Originally posted here, moved to code review, redirected from code review back here as there is no code to review. I think the question is enough abstract to be asked here.
I have a mono repo with ...
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Microservice Web app - How will I handle User Login in my project management app
I've just started learning to use this architecture and I'm trying to build a simple project management app. The App works such that a user after registering, creates a workspace. This Workspace is ...
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Domain Boundary Definition in `proximity service` as a Case Study
While practicing System Design, I decided to create a hypothetical proximity service (like Google Maps) with a microservice architecture. Suppose we have 3 core categories of functionality:
CRUD ...
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Avoid race condition using RDBMS transaction
I am working on design of a distributed system which will process some events. For simplicity lets say, multiple instance of same service will be consuming from same queue, every message will have a ...
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Choosing an Approach for Microservice Communications
I'm developing a doctor-patient system that consists of two microservices, namely the "doctor" and "patient" microservices. Both doctors and patients share some common attributes, ...
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Cheap But Effective Solution for Logging in a private rest microservices backend api
I've created a backend following a microservices architecture and now I need to implement logging.
my understanding
After reading some articles about this topic, I've listed below some "pretty ...
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Best approach to microservice shared databse architecture
I have two microservices, one Flask (python) and one Spring (java), they currently share a database. The Flask microservice handles processing json files (~40mb) for each user (could be 100's or 1000'...
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In an event-driven system, what are the best practices around the number of events and size/atomicity?
If you can have one event with multiple "things to process" or one event per thing to process, what is considered the best practice? Bearing in mind, the former option may involve persisting ...
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Microservices distributed lock mechanism
I am using spring boot with mongo db (azure cosmos db) in my microservices. Currently I have an Orders collection that stores Orders. These documents have a field userId that is null when the document ...
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Data producers and consumers: How to connect MySQL with microservices?
Consider a web-app with 5 micro-services deployed with Docker, and a MySQL container dedicated to storing data produced from other services (shared-database pattern). How should I make the connection ...
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Ordering events across multiple topics in a distributed system
Our platform is growing in the number of events we're raising, and these different events are often related to one another:
ProductCreated
ProductUpdated
ProductTakenOffSale
ProductPutOnSale
...
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How to handle the consumption of multiple event types when timing is crucial?
I have a distributed platform which allows customers to make purchases, and the items which are purchased are stored in an inventory:
Sales app -> PurchaseEvent -> Inventory app
The Sales app ...
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How to design inter-service communication with notifications microservice?
I'm creating an application based on the microservice architecture and stuck on notifications microservice design. Basically it should be a service that notifies users about events happening in the ...
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Is layered architecture style inherently monolithic?
Overall cost and simplicity are the primary strengths of the layered architecture style. Being monolithic in nature, layered architectures don’t have the complexities associated with distributed ...
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Proper use of microservices within the system
I have an application in which a client interacts with a backend, which interacts with blockchain. Since blockchain executions can be time-consuming, they are executed asynchronously within different ...
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Is my security pattern correct for authenticating principal users to my microservices?
We are trying to implement an authorization and authentication service for our product.
Now, we would have to cater to different kinds of IAM systems like SSO, LDAP and Basic Username+Password in ...
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How to handle dependencies between microservices all called within one large service
We are working on a suite of Python 'services' each of which is basically an application that does some calculations based on a domain (data) model and returns the results. These services are designed ...
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How to decomposing a single bounded context into multiple microservices for organisational purposes?
I have a monolith implementing what is basically an ETL process, receive data from external system, orchestrate the processing of it, and then pass the results back to an external system. (The ...
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What make a microservice a microservice?
I am new to microservice.
While learning about them, I was wondering what is the basic rules (the minimum) that make a microservice a microservice.
I have found some rules/characteristics along the ...
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Many-To-Many relationships in a Microservice architecture and if the services are correctly identified
I am creating a distributed chat system with a microservice architecture where a user can log in and chat with another user. The services that I identified is a conversation service that handles chat-...
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Exchanging data between two Microservices
I am facing this problem and would like to review my approach to it here.
A Client sends an HTTP request to Service A and is expecting an answer.
Service A is connected to DB A. When it receives a ...
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Should I create access control as a microservice or keep the access control logic as part of the specific microservice?
I was wondering if I have a microservice called, for example, Weather, and only certain people can update certain properties around the weather such as Temperature, Precipitation, and Wind.
These ...
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Looking for specific paragraph in RFC [closed]
Some decades ago working with IRC, I remember a paragraph of some RFC and now I'm looking for it. I don't remember it by memory, only a concept:
When it comes to communication between two services, ...
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