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This guide explains how to add the spring-boot-startup-report library to a Spring Boot project, generate interactive HTML startup reports with bean details and flame graphs, view them during runtime or integration tests, and configure the dependency for production or test scopes.
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This article explains why Spring Cloud Gateway can return duplicate Access‑Control‑Allow‑Origin and Vary headers during CORS handling, analyzes the underlying processing flow, and provides two practical solutions—using DedupeResponseHeader configuration or implementing a custom GlobalFilter—to ensure a single, correct header is sent to the client.
This tutorial walks through creating a leave‑approval process in Spring Boot 2.3.12 with Activiti 7.1, illustrating how an Exclusive Gateway routes requests based on leave days, how flags control loop‑back or completion, and provides full BPMN, service, and controller code examples.
This article introduces Apache Kafka, explains its publish‑subscribe and point‑to‑point models, outlines why it is used for decoupling and high‑availability, and provides a step‑by‑step Spring Boot integration guide with configuration, producer and consumer code samples.
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