Document Buildpacks CDS and Spring AOT support about spring-boot HOT 1 OPEN

just a (arm64) note : spring-boot Maven and Gradle plugins use, by default,

• the builders named paketobuildpacks/builder-jammy-base:latest or paketobuildpacks/builder-jammy-tiny:latest when native is activated - none of them support dual arch (yet) ❌
• the (composite )buildpacks named paketobuildpacks/java:latest or, when native is enabled, paketobuildpacks/java-native-image:latest both of them are published as dual arch now ✅

To benefit from dual arch support, the users have to specify an alternative builder: paketobuildpacks/builder-jammy-buildpackless-tiny:latest which is dual arch - otherwise, the arm64 path is not complete and won't allow users to use Java buildpacks arm64 flavor.

Since this builder is buildpackless users have to manually specify the buildpacks they need.

Maven:

<plugin>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-maven-plugin</artifactId>
	<executions> <!-- not necessary for arm64, but better take good habits now-->
		<execution> 
			<id>process-aot</id>
			<goals>
				<goal>process-aot</goal>
			</goals>
		</execution>
	</executions>
	<configuration>
		<image>
			<env> <!-- not necessary for arm64, but better take good habits now-->
				<BP_JVM_CDS_ENABLED>true</BP_JVM_CDS_ENABLED>
				<BP_SPRING_AOT_ENABLED>true</BP_SPRING_AOT_ENABLED>
			</env>
			<buildpacks>
				<buildpack>paketobuildpacks/java</buildpack>
			</buildpacks>
			<builder>paketobuildpacks/builder-jammy-buildpackless-tiny</builder>
		</image>
	</configuration>
</plugin>

Gradle:

plugins {
[...]
	id("org.graalvm.buildtools.native") version "0.10.1" // not necessary for arm64, but better take good habits now
}
[...]
tasks.bootBuildImage {
	builder.set("paketobuildpacks/builder-jammy-buildpackless-tiny")
	buildpacks.add("gcr.io/paketo-buildpacks/java")
	environment.put("BP_SPRING_AOT_ENABLED","true") // not necessary for arm64, but better take good habits now
	environment.put("BP_JVM_CDS_ENABLED","true") // not necessary for arm64, but better take good habits now
}

There is no scheduled date when the default builders paketobuildpacks/builder-jammy-base:latest and paketobuildpacks/builder-jammy-tiny:latest will be published as dual arch(the best bet is to wait for the Ubuntu Noble based builders that will all be dual arch from day one and should arrive soon, but not for SB 3.3)

from spring-boot.