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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Keeping the impact of changes low when moving shared domain objects into a library
I’m refactoring a microservice project where multiple services share the same domain objects. Over time, these objects have diverged across services, causing inconsistencies.
To solve this, I plan to ...
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Achieving Multitenancy with an External Identity Provider
We are designing a backend system for a large platform where users can interact with multiple products on behalf of different companies.
We plan to use Keycloak as an external identity provider. The ...
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Handling authorization and authentication with an API gateway
Recently, I’ve found myself designing a microservices system, and I’m currently facing some challenges with authentication and authorization.
Context
All my microservices will be placed behind an API ...
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Microservice Architecture Design
I want to create one service that reads data from two databases and passes it to the customer devices. Is this an overall bad design decision? I think that since it is only read-only, it should be ...
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Scaling/microservices approach to reading files from same directory
My company receives files via SFTP. We currently have a service running on a timer that:
polls the inbound directory
moves files to an 'In Progress' directory
processes files (queueing messages for ...
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Designing a Scalable Caching Layer for User and Tenant Metadata in a Messaging System
I'm developing a microservice-based application that processes a high volume of messages. Each message must be handled according to the user’s personal settings and some tenant-specific (customer) ...
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Microservices blindly trusting anything due to network segmentation?
So I just fell in a project where microservices are inside private subnets and therefore aren't reacheable through the internet.
There is a balancer that can reach this microservices and this balancer ...
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Can we consider each microservice as a “small monolith” application? [closed]
I'm just getting started with software architectural patterns.
I first analyzed the difference between monolithic architecture and microservice architecture and I had a doubt.
Below I report the ...
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Is this too much for a modular monolith system? [closed]
A little background before I ask my questions. I've designed a system as an architect based on the requirements given to me by the client. The client has a team or two to three developers which are ...
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Why do I need an authorisation server if my micro services can validate JWTs directly?
I'm working on a Spring-based micro service project and considering different approaches for handling authentication and authorization. Instead of setting up a dedicated authorization server, I'm ...
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Is it a good idea to wrap node.js package functions in a micro-service architecture?
Our development team works with a micro-service node.js architecture. This means we work with a very large amount of repositories that currently each take care of their own dependencies.
To avoid ...
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Microservices shared end-to-end testing: Which version(s) of other microservices to use?
Introduction
I am reading Building Microservices (second edition) by Sam Newman.
In chapter 9 the author highlights 2 problems when desiging end-to-end testing for microservices:
Which version of the ...
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How to deal with TCP-sockets being dropped instead of closed server-side?
Scenario: An application maintains a pool of connections to another service. The other service drops (not closes) all connections but still accepts new connections.
What are the best way of dealing ...
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Scoped E2e testing on a microservice
As many, we use microservices in my company and there's some debate in my group whether a microservice has e2e tests on it's own.
I know e2e tests by definition are user flow tests.
Lets take for ...
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DDD: How to update a domain model with a lot of fields
Let's say there is a domain model:
@Table(name = "room")
@Getter
@FieldNameConstants
@AllArgsConstructor(onConstructor = @__({@PersistenceCreator}))
public class HotelRoom extends ...
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Bypass the need for a service layer with SQL Server views (for Read Only)
A service interface allows a service layer to support backwards compatibility. As long as the different versions of the API are still supported, then changes can be added to the newer versions of the ...
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Design and communication between microservies
To learn about things like microservices, messaging brokers and all other new and fancy things, I decided to create microservices that will let me monitor my base within Minecraft (done via ...
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Is there a way to avoid a lot of calls to other microservices from one single service request?
I'm developing a Microservices Web Chat Application using Spring boot and Websockets.
Right now my concern is the following: it seems like each one of my microservices need to make a lot of calls to ...
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Transaction Management Across Microservices with Rollback Mechanism using Kafka
I am currently developing a microservices architecture consisting of two services, and I'm facing a challenge related to transaction management and error handling.
Microservice A: This service is ...
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How to properly choose between two equivalent implementations, and how to prove you picked the correct one? [closed]
Thinking about non functional requirements (the -ities) and other concerns, which approach would you choose and why? consider the two snippets
Direct Supabase Connection
import { useState, useEffect } ...
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How to follow Outside-In TDD with Micro-services and Micro-frontends?
I was exploring TDD, specifically the Outside-In TDD pattern, where we need to write the acceptance (integration) test and then jump on to granular unit tests to implement the feature and make the ...
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How to split database entities or access responsibilities of services to these entities
I have two services, auth-sync and twitter-indexer.
We use Privy for auth (incl. SSO with 3rd parties). We sync our userbase from Privy to our own DB for certain analytics purposes. And the auth-sync ...
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Populating Cache in microservices
These days I was asked by our technological leader to populate a cache.
The exact nature of the request impacts a back-end (BE) system that operates on a database through a client library.
The BE is a ...
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How to tackle synchronizing large amounts of data across services in an efficient way?
I am working at a retailer with a deep catalog of products and we are taking stock of our architecture.
Currently, we use microservices, but all product information goes to a service that is getting ...
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Subscribing to a range of topics per instance of a service [closed]
If I have a system where my distributed service is sending live scores of 1000 s of football games from some hypothetical event to millions of clients. The service subscribes to the games from a ...
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Spring/Java multiple shared modules for different databases
I'm implementing a software based on the micro-service architecture using Spring/Java. Each micro-service connects to either a PostgreSQL or a MongoDB database. Is it standard practice to have a ...
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How to maintain dependencies shared among microservices?
There is a dependency jar containing tons of service classes mostly used to retrieve data from database, and this jar is used among several different micro services in one cluster.
There is a big ...
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Problem with data consistency in Microservice architecture(2pc transaction) when external dependency envolved
I have microservice architecture. I implement a distributed transaction flow (2-phase commit), kafka, and 1 coordinator service. So, my problem is in each step of preparation I am calling an outside ...
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Encapsulating a central soap service in a microservice?
I am currently developing an application (rest-backend and SPA) that requires information from people (personal data, department, superior... ). Our company has a central directory for this purpose. ...
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Protecting against malicious duplicate IDs in a distributed environment
Let's say we have multiple (somewhat autonomous) (micro-)services, and when entities are created, the ID (UUIDs or whatever) can be set externally. How can we ensure that an ID remains unique across ...
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How to avoid circular dependency in my scenario?
For example, I have a Business Intelligence (BI) microservice, it reads data from other microservices, and displays the data as a bar chart or some other styles.
My problem is, the BI microservice ...
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How to design permission-based authorization for individual resources for individual users?
I need to design a system that handles multiple types of resources, each having their own business logic and different types of actions available for those resources. The requirements are a natural ...
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Events data ownership in microservices
Imagin I have two microservices that need to send email to a customer about some important account realted things that happened.
For example, Billing service would like to send an email when a card ...
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How to implement event payload isolation in an event driven architecture?
I have an event, let's say order.placed The payload consists of some general information about the order and 3 confidential fields. For example part of the message should only be visible to consumer A,...
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Is turning objects that perform infite loops into a services a good practice?
I was assigned a task to change the communication mechanism between two parties, from Azure Event Hub to Azure Queue + Blob Storage.
On the way, I thought redesigning a bit the components to make it ...
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App that can be deployed both as monolith and microservices?
We have a monolith C++ application and I consider doing some major refactorings. Since we're not completely ready to go full "microservices only" (maybe in about two years time), I want to ...
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Monolithic Database to Microservices, but with Radical Data Model Changes
We are finishing up a long (over 1 year) project to retire our monolith. We have been moving pieces of functionality into microservices guided by domain driven design.
So far we have been leaving the ...
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Microservices - how to implement search combined with security cross cutting concern?
I am trying to design a system and bounded contexts.
I have 3 microservices: Security, ProductsCatalog and Customers.
Each microservice own its database.
Security is a cross cutting concern used in ...
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Best way to orchestrate/choreogaph steps in a pipeline where each step is executed by a separate microservice and may need to scale independently?
Update: Forget the 'best' way, any way to start with is good enough. I am new to this and figuring it out all by myself is taking too long. I don't even know where to start.
I am new to this and ...
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Many-to-many modeling for microservices
I have two microservices, say "students" and "courses", they represent separate entities that are managed separately by different teams.
A given student can be enrolled in multiple ...
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Microservices: separate db instance vs. separate db server
In a scenario with multiple teams, each overseeing a few microservices that collectively create a larger system, and where these services frequently use MongoDB databases, is it advisable for each ...
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How to effectively scale one microservice to multiple instances
Let’s say I have a booking microservice (single instance) with its own DB.
If I want to horizontally scale the service with multiple instances(exact same copy of the business logic code) running on ...
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How does a Bounded Context from DDD help scaling microservices?
New to the microservices architecture - but what I've picked up so far doing some research while designing a microservices architecture for a home rental system is these:
Individual microservice ...
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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 ...
user161357
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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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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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