spring-cloud
Different packaging formats for Spring Cloud Functions
Is your feature request related to a problem? Please describe.
For functions running on Cloud platforms, e.g. GCF, function package (JAR) is expected to contain a cloud-specific handler (e.g., HttpFunction) in the standard JAR format. A Main Class is not required, since the runtime is usually provides the main class.
Describe the solution you'd like Explore a custom LayoutFactory for Spring Boot plugin so that we don't need to use the Shade plugin, and/or introducing conflicts w/ Shade plugin.
However, Spring Boot layouts usually have nested JARs. This can introduce startup time hit more so than Shaded JAR.
Describe alternatives you've considered
This is exploratory discussion. I have made a POC LayoutFactory for GCF. However, there are potentially introducing the initial overhead + the Spring Cloud Function's AbstractSpringFunctionAdapterInitializer may be initializing again.
Additional context
