Notes for Mark Reinhold's Keynote presentation at Devoxx 2010 about the future of java. [With pics!]

[Reinier Zwitserloot]

Mark *just* finished talking, so, hot off the presses, my notes from
his keynote presentation at Devoxx 2010:


# Mark Reinhold at Devoxx '10.

Start off with a review of java versions, apologies and introspective
on the clusterfail that was the java 7 schedule - you've heard this
before: The setting of Sun broke all planning, and the conclusion is
for 7 to be a less ambitious release without closures, and then work
on getting Java8 out the door as fast as possible after that (the Plan
B stuff we've read about before).

## Productivity:

### Java7: Diamond Operator: Map<String, String> map = new
HashMap<String, String>(); can now become:
Map<String, String> map = new HashMap<>();

[Editor's note: Lombok will one-up this feature on Friday!]

### Java7: Automatic Resource Management blocks. You can write:
try (InputStream in = new FileInputStream(src)) {
// read from in
}

[Editor's note: Lombok has let you do this for over a year now via
@Cleanup].

### Java7: Mention of Project Coin and its features.

## Performance:

Clock rates have topped out, instead CPU speed now comes in the form
of more cores.

sequential iterator (for loops) on big lists aren't compatible with
massively multicore CPUs.
Functional style iteration (map / filter / zip / etc) are. Review of
what these do.
Lambdas are showcased as a solution, then Defender methods to add map,
filter, etc to the collections APIs: http://twitpic.com/37kxub


### long-term plans for java:

Now Mark talks about Reification. Explains what it is and why it would
be nice.

Mark then talks about primitives in generics: http://twitpic.com/37ky8w

And somebody's been learning from Project Lombok: Simple POJOs in
Java: http://twitpic.com/37kyk9

### Talking about DaVinci (Jython on the JVM is often faster than C-
Python, but we can do better with features like InvokeDynamic). No
news I haven't heard before.

### Talking about what Project Jigsaw is about. No changes to what
module-info.java looks like: http://twitpic.com/37kz6a . Main goal of
Project Jigsaw is to get rid of '-classpath'.

Also a mention of how the jar file format is hampering modularization
efforts, so it'll be replaced with jmod, which is a custom format
specifically designed for java modules. Can be converted to rpms/debs,
jars to work with older java versions, etc.

[Editor's note: This is the first time I remember jigsaw vs. Maven
talk, usually it's jigsaw v. OSGi]. Mark talks about unifying compile-
time module systems like Maven and runtime module systems like OSGi;
they're going to look into making jigsaw do both of those things.

Showcasing the jmod tool which lets you create, edit, and work with
jmod modules.

Promises looking into a CPAN-like 'remote repository' feature for
jmod, which would look something like this: http://twitpic.com/37l0pg

## JVM Convergence

Not particularly specific talk about 'HotRocket' - the idea of
integrating JRockit VM and the Hotspot VM.

Showcasing Mission Control and Flight Recorder, the VM introspection
tools of JRockit. No mention of the 'premium VM' news that was in the
news a week or two ago. Mark never specifically said Mission Control
or Flight Recorder are going to be in OpenJDK or the free Oracle JVM.

## Java Plan B:

Java 7 released Mid2011, then the features planned for Java 7 that
aren't close to done yet, moved out to Java 8, to be released Late
2012. Mark says he's "pretty confident" about these dates:
http://twitpic.com/37l22c

Mark shows the Umbrella JSRs for Java7 and Java8 having been submitted
to the JCP earlier today.

OpenJDK will remain GPL+Classpath Exception. IBM and Apple are going
to contribute to OpenJDK. The OpenJDK governance structure will be
rebooted. Mark expects a MacOS implementation of Java7 available
within a few months of general availability of the Linux and Windows
implementations.

Release schedule of Java7. Mark again states he's "pretty confident":
http://twitpic.com/37l3fe

NB: I'll clean this up and post it to my blog later.

[Dominic Mitchell]

On Wed, Nov 17, 2010 at 9:57 AM, Reinier Zwitserloot <rein...@gmail.com> wrote:

Mark *just* finished talking, so, hot off the presses, my notes from
his keynote presentation at Devoxx 2010:

Thanks for the detailed report!
 

Vewwwy intewesting.  This raises a tonne of questions.  Who maintains and curates the repository?  Will it be multi-repo (looks like it).  Does it cover source code and javadocs? (essential for IDEs).

My concern is that we'll end up with a tonne of poor quality dependencies unless somebody pays attention from the beginning.  The maven central repo is starting to get cleaned up, thankfully, and it would be nice if the same mistakes weren't repeated.
 

## JVM Convergence

Not particularly specific talk about 'HotRocket' - the idea of
integrating JRockit VM and the Hotspot VM.

Showcasing Mission Control and Flight Recorder, the VM introspection
tools of JRockit. No mention of the 'premium VM' news that was in the
news a week or two ago. Mark never specifically said Mission Control
or Flight Recorder are going to be in OpenJDK or the free Oracle JVM.

## Java Plan B:

Java 7 released Mid2011, then the features planned for Java 7 that
aren't close to done yet, moved out to Java 8, to be released Late
2012. Mark says he's "pretty confident" about these dates:
http://twitpic.com/37l22c

Mark shows the Umbrella JSRs for Java7 and Java8 having been submitted
to the JCP earlier today.

OpenJDK will remain GPL+Classpath Exception. IBM and Apple are going
to contribute to OpenJDK. The OpenJDK governance structure will be
rebooted. Mark expects a MacOS implementation of Java7 available
within a few months of general availability of the Linux and Windows
implementations.

Release schedule of Java7. Mark again states he's "pretty confident":
http://twitpic.com/37l3fe

NB: I'll clean this up and post it to my blog later.

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-Dom

[Neil Bartlett]

Thanks for the notes Reinier.

So Jigsaw wants to take on Maven as well as OSGi. In that case I
suppose that the enemy of my enemy is my friend ;-)

> module-info.java looks like:http://twitpic.com/37kz6a. Main goal of

[Reinier Zwitserloot]

I thought that would pique your interest :)

[Cédric Beust ♔]

On Wed, Nov 17, 2010 at 1:57 AM, Reinier Zwitserloot <rein...@gmail.com> wrote:

And somebody's been learning from Project Lombok: Simple POJOs in
Java: http://twitpic.com/37kyk9

Er... no offense Reinier, but we were already discussing putting this very feature in JSR 201 (that was in 2004).

--
Cédric

[Craig Kelley]

Is Lombok in JDK7?

Thanks for the excellent summary!

[Reinier Zwitserloot]

Lombok is not in JDK7.

[Fabrizio Giudici]

On 11/17/2010 12:19 PM, Neil Bartlett wrote:
> Thanks for the notes Reinier.
>
> So Jigsaw wants to take on Maven as well as OSGi. In that case I

> suppose that the enemy of my enemy is my friend ;-)u t
Maven about modularization was already hinted by Mark at J1 two months
ago. I think it's a good idea - please note that they're talking about
the module, the build system isn't affected as far as I understand. Thus
they could be as well saying "Ivy and modules".

--
Fabrizio Giudici - Java Architect, Project Manager
Tidalwave s.a.s. - "We make Java work. Everywhere."
java.net/blog/fabriziogiudici - www.tidalwave.it/people
Fabrizio...@tidalwave.it

[Moandji Ezana]

I got the impression that the aim was to integrate with Maven central, rather than compete with it. Other repos could be plugged in, I think.

Moandji

--
www.moandjiezana.com

Sent from my Android

[Mark Derricutt]

Maven central, or more - your corporate nexus/archiva/artifactory mirror.

I can see modules pulling directly from a local repo will be great for
deployment stuff.

--
"Great artists are extremely selfish and arrogant things" — Steven
Wilson, Porcupine Tree