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Frameworks & web · #vaadin
Learn how to declare Vaadin views with @Route, load them lazily, inject Spring beans, and guard navigation while keeping the initial bundle small.
Learn how Vaadin Flow’s server‑side navigation maps Java views to URLs, enables programmatic moves, and handles typed route parameters—plus tips on managing view‑state memory.
Stop loading entire database tables into your JVM. Learn how to implement server-side pagination in Vaadin using CallbackDataProvider and Spring Data JPA to keep your application scalable.
Learn how to manage server-side state in Vaadin, including memory profiling, trust boundaries, and strategies for scaling session-based JVM applications.
Discover how Vaadin’s @Push annotation turns a classic request‑response web app into a real‑time experience, the setup steps, a working example, and the trade‑offs you need to consider.
Server-Side State Persistence Vaadin Flow maintains a server-side component tree that mirrors the browser DOM. In high-availability environments, this state is often offloaded to a distributed session store to allow for seamless failover across multiple server nodes. Interoperability Constraints When the Java server state is serialized and stored externally,
Context Vaadin 24 LTS tightened enforcement of @AnonymousAllowed so that navigation now requires explicit permission even when a mock user exists in the Spring Security test context. This change affects integration tests that rely on @SpringBootTest with @WithMockUser to exercise views without production credentials. Problem When the Spring Security filter c
When Vaadin Flow is configured with pushMode=AUTO , the framework attempts a WebSocket connection before falling back to long polling if the handshake fails. In environments behind strict proxies or utilizing self-signed certificates, the WebSocket handshake may time out silently without triggering an explicit client-side error in the browser console. While
The goal is to establish a consistent interoperability path between Vaadin Flow server-side applications and externally developed Web Component clients without triggering deployment failures or runtime inconsistencies. Vaadin's push mechanism relies on a single WebSocket connection per session, and mixing Flow UI with external Web Components can produce dupl