- java-devroom - lists.fosdem.org

Talk Proposal: Java Checkpoint/Restore
by Christine Flood 29 Oct '18

29 Oct '18

Title: Java Checkpoint Restore Abstract: Java has evolved significantly in the past 20+ years. Users still want to run highly scalable monolithic applications, but now they also want to run in the cloud with fast startup and small footprint. Checkpointing will solve at least half of that problem. I'll show you how to checkpoint your java application and then restore it on a different machine, or several different machines. An application that might take minutes to warm up, can be warmed up, garbage collected, etc and then checkpointed. Users can restore Java processes in ms. I'll give an overview of CRIU (Checkpoint Restore In Userspace) a Linux utility that Java checkpointing is based on, present the proposed Java API, and then demo some interesting use cases. Recording me on audio and/or video is acceptable under a CC-BY-2.0 license (DEFAULT) Brief Bio: Christine Flood has been working on programming language design and implementation for over 20 years. She's worked for academia and industry from the labs to the trenches. She's currently focused on checkpointing for Java and she can't wait to tell you about it.

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Proposal: the doom of java: part 3
by Blackbeard334 29 Oct '18

29 Oct '18

Abstract: If you know what a 486 is, then you most probably know Doom(IDKFA, IDDQD). If you don't...then shame on you! Fast-forward a decade, and Doom 3 is released! Fast-forward another decade, and Doom 3 is open sourced!! Fast-forward a couple of years, and some moron starts porting Doom 3 to Java(free java even)!!! *ahem*...I don't remember the exact reason why I started the project, but I think I was just curious. And to be fair, I thought I would be done in like 6 months. So this talk will be a short overview of the status of ~4 years of development, highlighting some of the . biggest problems(and surprises) of redeveloping a game of this scale and complexity, in Java... Sent with ProtonMail Secure Email.

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Schedule and approved talks!
by Mario Torre 14 Feb '18

14 Feb '18

Hello all! I will be sending each one of you an email. The quality of each proposal was incredible, it was the hardest DevRoom to organise so far, excluding any of the proposal was not easy, and it was one reason why we delayed this announcement. We have packed the DevRoom as much as we could possibly do, but even so we only had so much time. I wish to thank, personally and on behalf of the committee, each and anyone of you who proposed a talk, hoping to see you all at FOSDEM this year! Without further ado, this is the list of selected talks and the draft schedule for our DevRoom. 10:25 10:30 - Welcome 10:30 11:15 - State of OpenJDK 11:20 11:45 - The OpenJDK Developer Experience 11:50 11:15 - Opening the Oracle JDK 12:20 12:45 - The Z Garbage Collector - An Introduction 12:50 13:15 - Rubber 'Duke' Debugging 13:20 13:45 - MethodHandles Everywhere! 13:50 14:15 - Top Ten Metrics for Evaluating your Garbage Collector 14:20 14:45 - Graal: How to use the new JVM JIT compiler in real life 14:50 15:15 - JVM startup: why it matters to the new world order 15:20 15:45 - Class Metadata: A User Guide 15:50 16:15 - Java in a World of Containers 16:20 16:45 - Class Data Sharing - Sharing Economy in the HotSpot VM 16:50 17:15 - Hairy Security 17:20 17:45 - Hacking the JVM from Java 17:50 18:15 - G1 - Not^H^H^HNever Done! 18:20 19:00 - OpenJDK Governing Board Q&A We also have a small list of backup talks, in no particular order: AdoptOpenJDK: Enhancing OpenJDK’s “build, test, contribute” pipeline Restful Services with the Play Framework and a Security Level with JWT Shenandoah GC: What We Know In 2018 Marlin, an OpenJDK Success Story: Vector Graphics on Steroids for Java 2D and JavaFX I will be in touch with everyone directly shortly (just need some time to wrap up, but I'll start sending emails out today). Thanks again for making the Java DevRoom what it is! Cheers, Mario -- pgp key: http://subkeys.pgp.net/ PGP Key ID: 80F240CF Fingerprint: BA39 9666 94EC 8B73 27FA FC7C 4086 63E3 80F2 40CF Java Champion - Blog: http://neugens.wordpress.com - Twitter: @neugens Proud GNU Classpath developer: http://www.classpath.org/ OpenJDK: http://openjdk.java.net/projects/caciocavallo/ Please, support open standards: http://endsoftpatents.org/

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Free Java DevRoom talk proposal: Marlin, an OpenJDK Success Story: Vector Graphics on Steroids for Java 2D and JavaFX
by Laurent Bourgès 01 Feb '18

01 Feb '18

Title Marlin, an OpenJDK Success Story: Vector Graphics on Steroids for Java 2D and JavaFX Abstract The Marlin renderer is an open source pure-Java java2D anti-aliasing renderer, forked from the OpenJDK's Pisces renderer to provide a faster alternative with very good scalability to OpenJDK renderers. Since dec 2015 I contributed back the Marlin renderer to OpenJDK 9 by the successfull JEP 265. In 2016 I ported it to JavaFX in the MarlinFX project to replace the shape rasterizer in OpenJFX 9, integrated in Dec. 2016. In 2017 I improved Marlin even more: new double precision pipeline & efficient path clipping, coming to OpenJDK 10. In this session, you will learn what's new in the Marlin / MarlinFX github projects, how to use Marlin in Java 8 / 9 / 10 (including some tuning), which releases are integrated in OpenJDK / JFX 9 & 10, and get performance results on both 2D & JavaFX renderers. As the single contributor to the Marlin project, I am looking for other people to help me testing & implementing new features. Recording me on audio and/or video YES acceptable under a CC-BY-2.0 license (DEFAULT) Brief Bio Laurent Bourgès is a software engineer at the OSUG data center (CNRS) in the French Alps, working with scientists (astronomers). I learned computer programming at 5 years old (basic on zx-81) then Borland C++ on my pc computers and discovered a passion for 3D and raytracing software. After studying Physics at master level, I worked 9 years in paris in several software service companies on distributed architecture based on J2EE server clusters. I moved into Grenoble in 2009 to join the R&D software team working on observation tools for astronomers and got an academic permanent position in 2014. I have now 15 years of experience in Java programming mostly on concurrency, multi-threading & performance (optimisation, benchmarks). On my spare time, I am the author of the Marlin renderer & MarlinFX rasterizer, derived from the OpenJDK Pisces (shape) renderer. Since 2015 I am contributing to OpenJDK 9 to integrate the Marlin renderer and since 2016, to OpenJFX 9. In Oct 2017 I presented my FOSS work on the Marlin renderer at JavaOne. Microblog URL @laurent_bourges Blog URL https://github.com/bourgesl/marlin-renderer https://github.com/bourgesl/marlin-fx Cheers, Laurent

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Talk proposal: Shenandoah GC: What We Know In 2018
by Roman Kennke 13 Dec '17

13 Dec '17

Title: Shenandoah GC: What We Know In 2018 Abstract: Shenandoah is an ultra-low pause garbage collector for OpenJDK, developed by Red Hat. It adds concurrent compaction to the mix, making all heavy-weight phases in GC cycles concurrent, and thus reducing latency, especially for applications with large heaps. This talk is about brief status for Shenandoah in 2018 and what changed in past years, the performance successes it has, the challenges faced by the implementation, the ideas that are being tried, and plans for the future. Speakers: Aleksey Shipilev, Red Hat Roman Kennke, Red Hat Time: can do a short one in 25 minutes, but 45 minutes would be better Bios: Aleksey is working on Java performance for 10+ years. Today he is employed by Red Hat, where he does OpenJDK development and performance work. Aleksey develops and maintains a number of OpenJDK subprojects, including JMH, JOL, and JCStress. He is also an active participant in expert groups and communities dealing with performance and concurrency. Prior joining Red Hat, Aleksey was working on Apache Harmony at Intel, then moved to Sun Microsystems, which was later consumed by Oracle. Roman Kennke is Prinipal Software Engineer at Red Hat, where he worked and works on OpenJDK and several related projects, including Thermostat, the Zero and Shark ports of OpenJDK, and currently on the Shenandoah GC. In past lifes, he worked at aicas (realtime Java VM), Sun Microsystems (Webstart, Swing) and JP Morgan (you don't want to know). Recording: ok

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Talk proposal: Java Code Coverage mechanics
by Evgeny Mandrikov 11 Dec '17

11 Dec '17

Title: Java Code Coverage mechanics Abstract: JaCoCo is a widely adopted code coverage library for the JVM which is integrated in many build tools and IDEs. In this talk the we will explore the tricky implementation details of the library, including support of Java 9. And how participation in OpenJDK Quality Outreach helps us test OpenJDK Early Access builds, report bugs to OpenJDK and improve the library. Time: Usually this talk takes 35-40 min, 25 might be too tight, but can do my best to fit in 25. Speaker: Evgeny Mandrikov Twitter: @_godin_ Recording me on audio and/or video: Acceptable under a CC-BY-2.0 license Bio: Evgeny is a contributor to various open source projects and a speaker at international conferences and JUGs. Together with Marc Hoffmann, he is the project lead of JaCoCo and the award-winning EclEmma project at the Eclipse Foundation that integrates JaCoCo into Eclipse. In his day job at SonarSource Evgeny develops SonarQube’s static source code analysis for languages such as Java, C/C++, C#, JavaScript.

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Talk proposal: Multi-Release JARs - How to build them?
by Uwe Schindler 10 Dec '17

10 Dec '17

Title: Multi-Release JARs - How to build them? Abstract: Multi-Release JARs are a cool new feature that came with Java 9, but explicit support to create them was completely missing in any of the available build tools outside of the JDK. Currently users are on their own: You need to have separate build trees with lots of code duplication, you need multiple JVMs during building, and finally you have to use a custom Maven, Gradle, or Ant tasks to package your JAR file. This talk will give an overview about Multi-Release JARs and how to handle them in your build tool. Finally, it will show a cool "alternative" that is used in Apache Lucene to link the search engine to some of the new Java 9+ highly optimized static methods for bounds checking or array comparisons. Time: Short Speaker: Uwe Schindler Twitter: @thetaph1 Blog: blog.thetaphi.de Website: www.thetaphi.de Recording me on audio and/or video: Acceptable under any CC-BY license Bio: Uwe is committer and PMC member of Apache Lucene and Solr. His main focus is on development of Lucene Java. He implemented fast numerical search and is maintaining the new attribute-based text analysis API. He studied Physics at the University of Erlangen-Nuremberg and works as managing director for SD DataSolutions GmbH in Bremen, Germany, a company that provides consulting and support for Apache Lucene, Elasticsearch, and Apache Solr. He also works for “PANGAEA – Publishing Network for Geoscientific & Environmental Data” where he implemented the portal's geo-spatial retrieval functions with Lucene Java. Uwe had talks about Lucene at various international conferences like the previous FOSDEM, Berlin Buzzwords, ApacheCon EU/US, Lucene Revolution, Lucene Eurocon, and various local meetups. ----- Uwe Schindler uschindler(a)apache.org ASF Member, Apache Lucene PMC / Committer Bremen, Germany http://lucene.apache.org/

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Free Java DevRoom talk proposal: AdoptOpenJDK: Enhancing OpenJDK’s “build, test, contribute” pipeline
by Tim Ellison 10 Dec '17

10 Dec '17

*Title* AdoptOpenJDK: Enhancing OpenJDK’s “build, test, contribute” pipeline *Abstract* (at least two paragraphs) The AdoptOpenJDK project provides high quality Java SE binaries based upon an open, common, audited, build infrastructure. In this talk we describe the recent work that brings OpenJDK-based development to everyone by developing a modern devops pipeline to take your idea from discussion to final delivery. Hear about how AdoptOpenJDK established a large heterogeneous build farm in the community, is using that to manage new build/test infrastructure, and has created a flexible website site for the release of builds. Join us as we show the lifecycle of a patch from concept to delivery in hundreds of thousands of downloads. This talk will appeal to devops and Java developers alike. http://adoptopenjdk.net *Recording me on audio and/or video* Acceptable under a CC-BY-2.0 license (DEFAULT) *Brief Bio* Tim & Martijn are long term contributors to OpenJDK and the JCP. https://www.linkedin.com/in/tpellison/ https://www.linkedin.com/in/martijnverburg/ *MIcro blog* @adoptopenjdk @tpellison @karianna *Blog URL* https://blog.adoptopenjdk.net/

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Talk proposal: Java in a World of Containers
by Mikael Vidstedt 10 Dec '17

10 Dec '17

Title: Java in a World of Containers Abstract: Container technologies such as Docker are rapidly becoming the de-facto way to deploy cloud applications, and Java is committed to being a good container citizen. This talk will cover some of the new the tools and techniques for reducing container size (jlink, Alpine/musl support), for improving startup time and sharing of data between JVMs (AppCDS and ahead-of-time compilation), and the recent work that has gone into interacting with container resource limitations. Time: 25 min (can be extended to 45 minutes) Speaker: Mikael Vidstedt Microblog URL: Twitter: @MikaelVidstedt Recording me on audio and/or video: acceptable under a CC-BY-2.0 license Brief Bio: Mikael Vidstedt is managing the Java Virtual Machine (JVM) team at Oracle. Over the last 17 years he has been working all the various aspects of the Java and JVM technologies, focusing on everything from compilers and optimization to operating systems and server virtualization. He has worn many hats, including that of JVM tech lead and Architect. He is the Project Lead of OpenJDK Project “Portola”, providing a port of the JDK to Alpine Linux and the musl C library.

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Free Java DevRoom talk proposal: OpenJDK Governing Board Q&A
by mark.reinhold＠oracle.com 09 Dec '17

09 Dec '17

Title: OpenJDK Governing Board Q&A Abstract: An open Q&A session with members of the OpenJDK Governing Board. Andrew Haley, Doug Lea, Mark Reinhold, and Georges Saab have confirmed so far. Recording: Okay (at least on my part; I can't speak for others) Brief bio: Chief Architect, Java Platform Group, Oracle Blog: http://mreinhold.org/blog Twitter: @mreinhold NOTE: As in the past, allocating more than 25 minutes for this session would likely be appreciated by all attendees.

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