To JAR Hell And Back - A Live Migration to the Java 9 Module System

on YouTube ↗49m

" summary

Live migration of a Maven multi-module app to Java 9 reveals concrete breakage and fixes: use jdeps to find missing JDK modules, swap Sun internal APIs to java.util.Base64, and replace Java EE libs or add them with --add-modules; Mockito/ByteBuddy triggers illegal reflective access fixed with --add-opens or by updating libraries; split packages (jsr305 vs JDK) force using --patch-module or renaming/merging jars; application class loader stops being URLClassLoader so classloader casting breaks. Most fixes are runtime JVM flags or dependency upgrades; jlink creates slim images.

AI-written summary · about

" chapters (8)

1. 0:00Start
2. 0:24Public Service Announcement
3. 3:11Module Declaration
4. 3:53Reliable Configuration
5. 6:56Other Features
6. 9:57The Unnamed Module
7. 33:15Split Packages
8. 44:54Run-Time Images

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