Tag: spring
All the articles with the tag "spring".
Enterprise JDK Upgrades (Part 1): Moving from JDK 11 to JDK 17
Using an upgrade of multiple company Java applications from JDK 11 to JDK 17, this article discusses compatibility checks and a staged migration. It covers changed exception messages, reflective-access restrictions, separate runtime and compile-time transitions, and supporting changes to Tomcat, Jenkins, and development environments.
Using Eclipse Krazo (Jakarta MVC)
An introduction to Jakarta MVC and its Eclipse Krazo implementation, using page access and form submission to explain controllers, models, views, redirects, and parameter validation. Source-code analysis traces CSRF token generation and validation, followed by a custom page for validation failures.
SpEL: Getting Started and Quick Reference
This quick reference covers common ways to read and assign values with Spring Expression Language (SpEL), the two @Value syntaxes, and the role of the evaluation context. Java examples demonstrate property access, collection operations, method calls, null handling, and collection filtering.
Learning RabbitMQ and Spring AMQP (Part 5): Delayed Queues
Uses scenarios such as scheduled assignment publication to explain delayed messages and implements them with the RabbitMQ delayed-message plugin. It demonstrates plugin installation, declaring a delayed exchange, and setting message delays, compares Java Client and Spring AMQP code, and verifies the result through send and receive times.