Because out-of-the-box Headlands ships with hazelast, by deploying WARs on multiple servers you get a distributed cache / in-memory grid "for free".
Headlands is already used in production. We will also discuss headlands together with docker as one of the samples at the upcoming Airhacks: Java EE Microservices.
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
airhacks.fm the podcast:
Stay in touch: airhacks.news.