In Microservices and Java EE you are not communicating via Java APIs any more. JAX-RS is the new Java interface. This design constraint dramatically simplifies internal exception handling in Java EE applications:
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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