Contents
Does a Microservice need a database?
The core characteristic of the microservices architecture is the loose coupling of services. To achieve that, each service must have its own private data store. So, building the database architecture for microservices almost always requires following the database-per-service pattern.
Are microservices just APIs?
Microservices are an architectural style for web applications, where the functionality is divided up across small web services. whereas. APIs are the frameworks through which developers can interact with a web application.
How large can a microservice be?
Scoping Microservices A common question people ask is “How big (or small) should my microservice be?” One common answer is that the size of a microservice can be variable, but it should be coded by no more than a dozen people (the so-called “two pizza rule”).
How to handle duplicated data in a microservice?
Every microservice will publish CRUD changes to event bus, interested micro-service consume those events & update local cache accordingly. Problem with REST call is, in some situation when dependent service is down we can not query main microservice, which could become bottleneck sometime.
What is the dilemma of code reuse in microservices?
Besides, reusing code within a Microservice boundary is not a question at all. The dilemma is about reusing code between Microservices. When we consider several Microservice teams, we want each team to operate with minimal dependencies between each other.
When to not rely on synchronous requests for microservices?
A relevant passage: And finally (and this is where most of the issues arise when building microservices), if your initial microservice needs data that’s originally owned by other microservices, do not rely on making synchronous requests for that data.
Which is the hardest part of creating a microservice?
Continuing on with my series about microservices implementations (see “ Why Microservices Should Be Event Driven ”, “ Three things to make your microservices more resilient ”, “ Carving the Java EE Monolith: Prefer Verticals, not Layers ” for background) we’re going to explore probably the hardest problem when creating and developing microservices.