From Code to Cloud: My Learnings in Java, Spring Boot, and Beyond

Q.1) What is the difference between Web Services and Micro Services? Web Services  are about exposing functionalities over a network, often as part of a monolithic or layered application. Microservices  are about designing a system as a suite of small services, each running independently and focused on a single business capability. Q.2) What is microservices? Microservices are a software development technique and a variant of the Service-Oriented Architecture (SOA) style that structures an application as a collection of loosely coupled, fine-grained services communicating over lightweight protocols. Key benefits: Improved modularity: Decomposing a large application into smaller, manageable services makes it easier to understand, develop, and test. Independent teams: Small autonomous teams can develop, deploy, and scale their services independently, speeding up development cycles. Resilience to architecture erosion: Continuous refactoring of individual services he...

Diff of Spring and Spring boot                                         1) Spring Framework is a widely used Java EE framework for building applications. 1)Spring Boot Framework is widely used to develop REST APIs. 2)It aims to simplify Java EE development that makes developers more productive. 2)It aims to shorten the code length and provide the easiest way to develop Web Applications. 3)The primary feature of the Spring Framework is dependency injection. 3)The primary feature of Spring Boot is Autoconfiguration. It automatically configures the classes based on the requirement. 4)It helps to make things simpler by allowing us to develop loosely coupled applications. 4)It helps to create a stand-alone application with less configuration. 5)To test the Spring project, we need to set up the sever explicitly. 5)Spring Boot offers embedded server such as Jetty and Tomcat, e...

Concurrency in Java enables multiple threads to run in parallel, allowing applications to utilize CPU cores efficiently and improve throughput. This guide explores Java concurrency — from the basic Executor interface to advanced constructs like ThreadPoolExecutor , ScheduledExecutorService , and concurrency utilities like CountDownLatch , CyclicBarrier , and more. 1. Executor vs. ExecutorService ✅ Executor The simplest interface for task execution:      void execute (Runnable command) ; Executes the command asynchronously using an implementation-defined strategy. ✅ ExecutorService More advanced than Executor , it supports: Lifecycle management Task submission with results (Future) Shutdown and termination <T> Future<T> submit (Callable<T> task) ; void shutdown () ; boolean awaitTermination ( long timeout, TimeUnit unit); 2. ⚙️ ThreadPoolExecutor: Fine-Grained Control Why use ThreadPoolExecutor ? Gives you full control over...