Two microservices, A and B, share the same database for some entities due to legacy design.
Microservice A makes a change to the entity, but Microservice B does not reflect the change immediately, leading to inconsistent behavior.
How would you refactor the system to solve the shared database issue without creating downtime?
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The Builder Design Pattern separates the construction of a complex object from its representation, allowing step-by-step creation with various configurations. It provides control over the building process, ensuring different objects can be created using the same construction code
The Strategy Pattern defines a family of algorithms, encapsulates each one, and makes them interchangeable. It allows a client to choose an algorithm from a family of algorithms at runtime, promoting flexibility and reducing dependencies between the client and the algorithms.
The Observer Pattern defines a one-to-many dependency between objects. When the state of one object (the subject) changes, all dependent objects (observers) are notified and updated. This promotes loose coupling, allowing dynamic interaction and easier maintenance of states.
The Prototype Design Pattern creates new objects by copying an existing object (the prototype). It allows efficient object creation through cloning rather than creating from scratch, which is useful for complex or costly objects, reducing the overhead of object initialization.
The Abstract Factory Design Pattern creates families of related objects without specifying their concrete classes. It provides a way to encapsulate a group of factories with a common interface, promoting consistency and flexibility across a set of related objects.
The Factory Design Pattern creates objects without specifying the exact class. It defines an interface for object creation, allowing subclasses to decide which class to instantiate.This promotes flexibility and loose coupling by separating the creation logic from the client code.
A singleton class in programming is a design pattern where only one instance of the class is created and used globally. It's often implemented in languages like Java by making the constructor private and providing a static method to access the instance,ensuring controlled access.