Compact Profiles Demonstrated
By Jim Connors 12 August 2013
Following up on an article
introducing compact profiles, the video that follows
demonstrates how this new feature in the upcoming Java 8 release
can be utilized. The video:
Describes the compact profile feature and the rationale for
its creation.
Shows how to use the new jrecreate utility to
generate compact profiles that can be readily deployed.
Demonstrates that even the smallest of profiles (less than
11MB) is robust enough to support very popular and important
software frameworks like OSGi.
The software demonstrated is in early access. For those
interested in trying it out before the formal release of Java 8,
there are two options:
Members of the Oracle Partner Network (OPN) with a gold
membership or higher can download the early access Java 8
binaries of Java SE-Embedded shown here. For those not at
this level, it may still be possible to get early access
software, but it will require a qualification process
beforehand.
It's not as intimidating as it sounds, you can pull down the
source code for OpenJDK 8, and build
it yourself. By default, compact profiles are not
built, but this
forum post shows you how. The reference platform for
this software is linux/x86. Functionally, the generated
compact profiles will contain the pared down modules for each
compact profile, but you'll find the footprint for each to be
much larger than the ones demonstrated in this video, as none of
the Java SE-Embedded space optimizations are performed by
default.
Not having any premium privileges on YouTube, the maximum allowed
length of a video is 15 minutes. There's actually lots more
to talk about with compact profiles, including enhancements to
java tools and utilities (javac, jar, jdeps,
and the java command itself) that have incorporated
intelligence for dealing with profiles.
Hmm. Maybe there's an opportunity for a Compact
Profiles Demonstrated Part II?