amazon.com.uk Real World Java EE Patterns--Rethinking Best Practices
Real World Java Ee Night Hacks--Dissecting the Business Tier Both books are available for kindle and at lulu.com as PDF as well.
Web Apps, SPA, PWA with vanilla Java Script (ES 6+), CSS 3 and WebStandards only. As simple as possible, but not simpler. See you at: (Progressive) Web apps, Single Page Apps and WebStandards airhacks workshops at MUC airport, Winter Edition
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