The Lance

Topic: JVM Internals                                                                                                                         Level: Advanced Problem Statement When we run a Java application all the related classes and their dependencies associated are loaded at the runtime, adding to the startup time of the application as well as to the memory footprint. Every time when we launch the application, the process would be the same and starting up multiple instances of the application would add up significant latency, and also becoming memory intensive, as the same class-related data need to be replicated and loaded. What i...

Topic: JDK Release                                                                                                                            Level: Basic Introducing JDK 19 Java 19 is the 10th release since the transition to the 6-month release cadence of new JDK features, comprising of 7 JDK Enhancement Proposals. With the ever-releasing new JDK features catching up on the latest version could be a daunting task. However it is a gift in disguise, with the shorter releases,  Applications can effortlessly migrate to the successor versions by incorporating fewer minimal additions/deprecations in the features rather than...

   Topic: Software Design                                                                                                        Level: Intermediate Integration Patterns - What? Coordinating, intercommunicating, interfacing and converging the functionalities across the distributed service APIs 1. Chained Microservice Pattern In the process of constructing a response to the client request, a sole microservice alone would not be able to collate/compose all the necessary data, assuming that the certain dependent functionality is isolated and distributed across multiple services by each level of business capabilities (unless it follows Aggregator Pattern that orchestrates conc...

  Topic: Software Design                                                                                                        Level: Intermediate Integration Patterns - What? Coordinating, intercommunicating, interfacing and converging the functionalities across the distributed service APIs 1. API Gateway Pattern The API gateway is a service that acts as a single entry point interceptor facade in redirecting and routing incoming client requests to multiple distributed services. Residing in between the client application and the microservices it internally maps the incoming requests to the relevant services, by providing features such as  Reverse proxy Requests aggregatio...

Topic: Software Design                                                                                                        Level: Intermediate Decomposition Patterns - What? Breaking down the architectural design with respect to a defined context 1. Strangler Pattern Extracting a specific functional component from the application into an independent service component, then an intermediary facade is placed for routing the request traffic in tandem to both the legacy (for facilitating the functionality that is still not extracted) and the new component (for conducting the migrated functionality), and upon correctness completely decommissioning the functionality from the legacy desi...