OpenJDK Facts

Transcript

1. OpenJDK Facts
   

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2. This is a very very very long gag
   @hendrikEbbers
   Hendrik Ebbers
   • Karakun Co-Founder
   
   
   • Founder of JUG Dortmund
   
   
   • JSR EG member
   
   
   • JavaOne Rockstar, Java Champion
   
   
   • AdoptOpenJDK / Adoptium TSC member
   

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3. This is a very very very long gag
   @hendrikEbbers
   Hendrik Ebbers
   • I (and collect) boardgames
   
   
   • I STARWARS
   
   
   • I Hardrock
   
   
   • I Dogs
   

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4. This is a very very very long gag
   @hendrikEbbers
   Content
   • History recall
   
   
   • OpenJDK
   
   
   • Java release model
   
   
   • Eclipse Adoptium & others
   
   
   • Migration
   

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8. This is a very very very long gag
   @hendrikEbbers
   The wild 90th
   • "Oak" (Object Application Kernel) / "The Green
   Project" was developed in 1992
   
   
   • This project evolved to Java in 1995
   
   
   • The Duke was already the
   

   mascot for the
   

   Green Project
   

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9. This is a very very very long gag
   @hendrikEbbers
   The
   fi
   rst Java years
   • Java versions 1 till 6 were released at SUN
   
   
   • Java 1 was released 1996
   
   
   • Java 6 was released 2006
   
   
   • In 1998 the JCP (Java Community
   

   Process) was formed
   

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10. This is a very very very long gag
    @hendrikEbbers
    The takeover
    • In 2009 SUN was bought by Oracle
    
    
    • The Java community was really
    

    afraid about this move
    
    
    • Mostly no-one associated Oracle with
    

    open source
    

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11. This is a very very very long gag
    @hendrikEbbers
    Java getting old?
    • Big plans at SUN
    
    
    • Realisation at Oracle splitter in 2
    

    releases
    
    
    • JDK 7 (Security)
    
    
    • JDK 8 (Lambdas & Streams)
    

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12. This is a very very very long gag
    @hendrikEbbers
    Not your daddies Java
    • Functional programming FTW
    
    
    • Lambdas & Streams everywhere
    
    
    • Modularization of the JDK
    
    
    • Modularization of libs & apps
    
    
    • Keep up with the languages
    Dad Duke 2005
    

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13. This is a very very very long gag
    @hendrikEbbers
    The last years
    • Oracle managed to provide
    

    major updates of Java
    
    
    • Continued to evolve Java by the JCP
    
    
    • Not everything is perfect but
    

    much better than it was expected
    

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14. OpenJDK
    

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15. This is a very very very long gag
    @hendrikEbbers
    OpenJDK
    • Java has been open sourced
    

    in 2006
    
    
    • SUN derived OpenJDK from
    

    SunJDK as a vendor JDK
    
    
    • Oracle took over the work at
    

    OpenJDK and many companies
    

    followed...
    

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17. This is a very very very long gag
    @hendrikEbbers
    OpenJDK Groups & Projects
    Core Libraries Group
    2D Graphics Group
    HotSpot Group
    OpenJFX Project
    JDK Project
    Panama Project
    

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18. This is a very very very long gag
    @hendrikEbbers
    Java in a nutshell
    Standard APIs
    Tools
    JVM
    

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19. This is a very very very long gag
    @hendrikEbbers
    Oracle JDK & OpenJDK
    OpenJDK 8
    JVM, tools, etc. JVM, tools, etc.
    Exclusive Oracle
    stu
    f
    eg. Flight recorder
    
    
    WebStart
    
    
    Mission Control
    Oracle JDK 8
    

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20. This is a very very very long gag
    @hendrikEbbers
    Java getting old?
    OpenJDK 12 Oracle JDK 12
    JVM, tools, etc.
    equals
    JVM, tools, etc.
    

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21. This is a very very very long gag
    @hendrikEbbers
    Contribution to OpenJDK
    • Since OpenJDK is an open source project everybody
    can contribute
    
    
    • Both individuals and companies contribute to
    OpenJDK
    
    
    • Oracle still does over 75% of all contributions for the
    OpenJDK
    

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22. This is a very very very long gag
    @hendrikEbbers
    Contribution to OpenJDK
    • Happily more and more
    people of the Java
    community contribute to
    OpenJDK
    
    
    • Sadly Good tutorials and
    'Getting started' guides are
    missing
    We are working on that issue
    

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23. This is a very very very long gag
    @hendrikEbbers
    Companies that contributed in 11
    

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24. This is a very very very long gag
    @hendrikEbbers
    Companies that contributed in 16
    

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25. This is a very very very long gag
    @hendrikEbbers
    Companies that contribute
    • Alibaba
    
    
    • Amazon
    
    
    • Ampere Computing
    
    
    • ARM
    
    
    • Azul
    
    
    • Bellsoft
    
    
    • DataDog
    
    
    • Google
    
    
    • Huawai
    
    
    • IBM
    
    
    • Intel
    
    
    • JetBrains
    
    
    • Linaro
    
    
    • Longsoon
    
    
    • Microdoc
    
    
    • Microsoft
    
    
    • NTT Data
    
    
    • Qualcomm DCT
    
    
    • RedHat
    
    
    • SAP
    
    
    • Tencent
    
    
    • Twitter
    

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26. This is a very very very long gag
    @hendrikEbbers
    OpenJDK Distributionen
    Azul Zulu
    Oracle JDK
    Amazon Coretto
    AdoptOpenJDK
    Bellsoft Liberica
    Red Hat Upstream
    Adoptium Temurin
    

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27. This is a very very very long gag
    @hendrikEbbers
    Oracle Contributor Agreement
    • The following organizations and
    individuals have signed the OpenJDK
    Community TCK Agreement (OCTLA)
    and been granted access to the JCK
    *
    *
    * TCK - Test Compatibility Kit
    
    
    JCK - Java Compatibility Kit
    

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28. This is a very very very long gag
    @hendrikEbbers
    OpenJDK and Java Ownership
    • Java is a registered trademark of
    Oracle
    
    
    • OpenJDK is named independently
    
    
    • Access to the TCK is restricted
    
    
    • TCK access requires to sign the
    OCTLA
    

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29. This is a very very very long gag
    @hendrikEbbers
    OCTLA Signatories List (Java 9+)
    • Amazon.com Services, Inc.
    
    
    • Ampere Computing LLC
    
    
    • Azul Systems, Inc.
    
    
    • BellSoft
    
    
    • Canonical
    
    
    • Eclipse.org Foundation
    
    
    • The FreeBSD Foundation
    
    
    • Fujitsu Limited
    
    
    • Fujitsu Technology Solutions
    GmbH
    
    
    • Greg Lewis
    
    
    • Hewlett Packard Enterprise
    
    
    • J-Class Solutions, Inc.
    
    
    • JetBrains s.r.o.
    
    
    • Loongson Technology Co.,
    Ltd.
    
    
    • Marvell Semiconductor Inc.
    
    
    • MicroDoc Software GmbH
    
    
    • Microsoft
    
    
    • NCIT UNIPRO, LLC.
    
    
    • OpenLogic, Inc.
    
    
    • Red Hat
    
    
    • Sage Embedded Software LLC
    
    
    • SAP
    
    
    • SUSE Linux GmbH
    
    
    • Tencent Technology
    (Shenzhen) Co Ltd
    
    
    • Twitter
    
    
    • VMWare
    
    
    • Waratek Limited
    

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30. This is a very very very long gag
    @hendrikEbbers
    JDK Features
    • All features of new Java releases are de
    fi
    ned by JDK
    Enhancement Proposals (JEP) of the OpenJDK
    
    
    • De
    fi
    nitions of JEPs and the feature lists of a Java
    release can be found at the OpenJDK
    
    
    • JEP URL: https://openjdk.java.net/jeps/395
    
    
    • Release URL: https://openjdk.java.net/projects/jdk/16/
    

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33. This is a very very very long gag
    @hendrikEbbers
    JEP Count by Release
    Java 8 Java 9 Java 11 Java 12 Java13 Java 14 Java 15
    0
    10
    20
    30
    40
    50
    60
    70
    80
    90
    100
    50+
    90+
    17
    8 5
    16 14
    3+ years per release 6 month per release
    Java 16
    17
    Java 17
    14
    

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34. This is a very very very long gag
    @hendrikEbbers
    JDK 17 Features
    • 409: Sealed Classes
    
    
    • 406: Pattern Matching for Switch
    (Preview)
    
    
    • 356: Enhanced Pseudo-Random Number
    Generators
    
    
    • 382: New macOS Rendering Pipeline
    
    
    • 415: Context-Speci
    fi
    c Deserialization
    Filters
    
    
    • 412: Foreign Function & Memory API
    (Incubator)
    
    
    • 414: Vector API (Second Incubator)
    
    
    • 403: Strongly Encapsulate JDK Internals
    
    
    • 306: Restore Always-Strict Floating-Point
    Semantics
    
    
    • 411: Deprecate the Security Manager for
    Removal
    
    
    • 398: Deprecate the Applet API for
    Removal
    
    
    • 407: Remove RMI Activation
    
    
    • 410: Remove the Experimental AOT and
    JIT Compiler
    
    
    • 391: macOS/AArch64 Port
    

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35. This is a very very very long gag
    @hendrikEbbers
    JEP De
    fi
    nitions
    • The JEP de
    fi
    nition and work
    fl
    ow is de
    fi
    ned by JEPs:
    
    
    • JEP 0 contains an up-to-date index of all JEPs
    
    
    • JEP 1 & JEP 2 de
    fi
    nes the content and work
    fl
    ows of
    JEPs
    
    
    • JEP 3 de
    fi
    nes the release process of the JDK
    

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36. This is a very very very long gag
    @hendrikEbbers
    JEP De
    fi
    nitions
    • A Java release can contain JEPs as previews or in
    incubator mode:
    
    
    • JEP 11 de
    fi
    nes incubator mode
    
    
    • JEP 12 de
    fi
    nes preview mode
    

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37. This is a very very very long gag
    @hendrikEbbers
    Preview Features
    $ javac HelloWorld.java
    

    

    
    $ javac --release 14 --enable-preview HelloWorld.java
    
    
    $ java --enable-preview HelloWorld
    Enable all preview features
    of JDK 14
    Run with all preview features
    of JDK 14
    

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38. This is a very very very long gag
    @hendrikEbbers
    OpenJDK at Git
    • Since OpenJDK projects are now
    hosted at GitHub contribution is
    super easy
    
    
    • Every GitHub user can create a PR
    (+ some paperwork to have you
    checked as a valid OpenJDK
    commiter)
    

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39. This is a very very very long gag
    @hendrikEbbers
    All OS Builds with GitHub Actions
    • OpenJDK projects already use GitHub
    Actions for CI tasks
    
    
    • Automatically build and test JavaFX
    on all 3 big operation systems for
    each pull request
    https://github.com/openjdk/jfx/pull/619/checks
    

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40. This is a very very very long gag
    @hendrikEbbers
    Issue tracker is still untouched
    • The Java issue tracker has not changed with project
    Skara
    
    
    • OpenJDK Bug Tracker is still Jira based on not directly
    writeable by endusers
    

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41. This is a very very very long gag
    @hendrikEbbers
    Issue tracker is still untouched
    • Oracle provides hard to handle solution
    
    
    • If you want to follow me
    

    (Hendrik) down the rabbit hole:
    

    

    https://bit.ly/3nnJdsX
    

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42. Java Roadmap
    

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43. This is a very very very long gag
    @hendrikEbbers
    The classical Java releases
    • Up until Java 8 we had a
    fl
    exible release train for Java
    
    
    • A new major version was released "when it's done"
    
    
    • This ended in delays and a a big bundle of new
    features per release
    

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44. This is a very very very long gag
    @hendrikEbbers
    The classical Java releases
    • A version was available for several years
    
    
    • Normally a version received updates even after the
    next version was released
    
    
    • Commercial LTS support was provided by Oracle for
    legacy projects
    

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45. This is a very very very long gag
    @hendrikEbbers
    Oracle Java roadmap
    2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
    Java 6
    Java 7
    Java 8
    Free
    

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46. This is a very very very long gag
    @hendrikEbbers
    Oracle Java roadmap
    2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
    Java 6
    Java 7
    Java 8
    Free
    Commercial
    

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47. This is a very very very long gag
    @hendrikEbbers
    The new release train
    • Beginning with Java 9 Oracle announced the new
    release train
    
    
    • More
    fl
    exible with
    fi
    xed release dates
    
    
    • A feature will be released "when it's done"
    
    
    • Shorter lifetime of Java versions
    

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48. This is a very very very long gag
    @hendrikEbbers
    The new release train
    Java 9
    Java 10
    Java 11
    Java 12
    Java 13
    Java 14
    2018 2019 2020
    Java 8
    Basic version
    LTS version
    Java 15
    

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49. This is a very very very long gag
    @hendrikEbbers
    The new release train
    Java 9
    Java 10
    Java 11
    Java 12
    Java 13
    Java 14
    2018 2019 2020
    Java 8
    free version
    commercial
    version
    Some vendors provide LTS
    for production only by
    support subscription
    Java 15
    

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50. This is a very very very long gag
    @hendrikEbbers
    Oracle OpenJDK distribution
    Java 9
    Java 10
    Java 11
    Java 12
    Java 13
    Java 14
    2018 2019 2020
    Java 8
    free version
    commercial
    version
    Java 15
    

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51. This is a very very very long gag
    @hendrikEbbers
    Oracle JDK distribution
    Java 9
    Java 10
    Java 11
    Java 12
    Java 13
    Java 14
    2018 2019 2020
    Java 8
    Java 15
    Free
    Commercial LTS
    Not Free in Prod
    

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52. This is a very very very long gag
    @hendrikEbbers
    The new release train
    Preferred for
    LTS
    Java 9
    Java 10
    Java 11
    Java 12
    Java 13
    Java 14
    2018 2019 2020
    Java 8
    Java 15
    Java 16
    Java 17
    Java 18
    Java 19
    Java 20
    Java 21
    Java 22
    2021 2022 2023
    Java 23
    Java 24
    Java 25
    2024
    

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53. This is a very very very long gag
    @hendrikEbbers
    The new release train
    Preferred for
    LTS
    Java 9
    Java 10
    Java 11
    Java 12
    Java 13
    Java 14
    2018 2019 2020
    Java 8
    Java 15
    Java 16
    Java 17
    Java 18
    Java 19
    Java 20
    Java 21
    Java 22
    2021 2022 2023
    Java 23
    Java 24
    Java 25
    2024
    

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54. This is a very very very long gag
    @hendrikEbbers
    The new release train
    Oracle WTF???
    https://www.oracle.com/java/technologies/downloads/
    

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55. This is a very very very long gag
    @hendrikEbbers
    The new release train
    https://www.oracle.com/java/technologies/downloads/
    

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57. This is a very very very long gag
    @hendrikEbbers
    Temurin by Adoptium
    • Eclipse Adoptium is the successor of AdoptOpenJDK
    

    

    

    

    

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58. This is a very very very long gag
    @hendrikEbbers
    Temurin by Adoptium
    • Eclipse Adoptium is the successor of AdoptOpenJDK
    

    

    

    • Adoptium is top level project of Eclipse Foundation
    

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59. This is a very very very long gag
    @hendrikEbbers
    Temurin by Adoptium
    • Eclipse Adoptium is the successor of AdoptOpenJDK
    

    

    

    • Adoptium WG is based on leaders of the ecosystem
    

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60. This is a very very very long gag
    @hendrikEbbers
    Temurin by Adoptium
    • Eclipse Adoptium is the successor of AdoptOpenJDK
    

    

    

    • Eclipse Adoptium provides an OpenJDK distribution
    
    
    • That distribution is called Temurin
    

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61. This is a very very very long gag
    @hendrikEbbers
    Temurin by Adoptium
    • Eclipse Adoptium is the successor of AdoptOpenJDK
    

    

    

    https://adoptium.net
    

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62. This is a very very very long gag
    Temurin by Adoptium
    OpenJDK Sources
    Temurin Installer
    Binaries / Distribution
    ci.adoptopenjdk.net
    
    
    (ci.adoptium.net in near future)
    adoptium.net
    github.com/adoptium/installer
    github.com/adoptium/jdk
    
    
    github.com/adoptium/jdk8u
    Build / CI Infrastructure
    github.com/adoptium/temurin8-binaries/releases
    
    
    github.com/adoptium/temurin11-binaries/releases
    
    
    github.com/adoptium/temurin16-binaries/releases
    
    
    github.com/adoptium/temurin17-binaries/releases
    Platform Builds AQAvit
    github.com/adoptium/temurin-build github.com/adoptium/aqa-tests
    *
    *
    Redirect to
    TCK
    

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63. This is a very very very long gag
    @hendrikEbbers
    Why not 'Eclipse AdoptOpenJDK' ?
    • The answer is quite simple:
    

    

    

    

    

    • The Eclipse Foundation trademarks all names and
    'AdoptOpenJDK' is just not trademark able
    OpenJDK Java
    ™ ™
    

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64. The Eclipse Temurin Java runtime
    builds by Adoptium can not be
    named 'AdoptOpenJDK' since
    OpenJDK is owned by Oracle
    ™ ™
    ®
    ™
    ™ ®
    

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65. This is a very very very long gag
    @hendrikEbbers
    Just call the distro 'Adoptium' ...
    • NO! Adoptium is much more than 'just the binaries':
    AQAVIT is the quality and runtime branding
    evaluation project for Java SE runtimes and
    associated technology.
    Any Java runtime
    Open source AQAVIT test &
    benchmark suite
    Enterprise ready runtime
    https://bit.ly/3nnLVi7
    More Info:
    

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66. This is a very very very long gag
    @hendrikEbbers
    Just call the distro 'Adoptium' ...
    • NO! Adoptium is much more than 'just the binaries':
    We want to create a good
    landing page for OpenJDK
    and Java Newcomer
    

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67. This is a very very very long gag
    @hendrikEbbers
    Just call the distro 'Adoptium' ...
    • NO! We want to be convenient:
    

    

    Like ___________ provides ___________ the Adoptium
    project provides Temurin
    Azul Systems Zulu
    Amazon Coretto
    Bellsoft Liberica
    Oracle Oracle JDK
    

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68. This is a very very very long gag
    @hendrikEbbers
    Why 'Temurin' ?
    TEMURIN
    • The answer is quite simple:
    

    

    

    

    

    

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69. This is a very very very long gag
    • The answer is quite simple:
    

    

    

    

    

    @hendrikEbbers
    Why 'Temurin' ?
    N
    N
    N
    N
    O
    H3
    C
    CH3
    CH3
    O
    N
    N
    N
    N
    O
    H3
    C
    CH3
    CH3
    O
    CH3
    O
    Caffeine Temurin
    

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70. This is a very very very long gag
    @hendrikEbbers
    Eclipse Adoptium
    Community
    

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71. Other Distributions
    

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72. This is a very very very long gag
    @hendrikEbbers
    Other distributions
    • Several companies provide OpenJDK based
    distributions based on different reasons:
    
    
    • Some wants to sell LTS support
    
    
    • Some wants to provide it bundled with products
    
    
    • Some wants to use it in the company cloud
    
    
    • ...
    

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73. This is a very very very long gag
    @hendrikEbbers
    OpenJDK Distributionen
    Azul Zulu
    Oracle JDK
    Amazon Coretto
    AdoptOpenJDK
    Bellsoft Liberica
    Red Hat Upstream
    Adoptium Temurin
    

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74. This is a very very very long gag
    @hendrikEbbers
    Other distributions
    • It is really hard to choose a distribution...
    
    
    • Adoptium tries to help the user by providing a
    marketplace
    
    
    • The Adoptium marketplace will only contain
    distributions that are TCK and AQAvit approved
    

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75. This is a very very very long gag
    @hendrikEbbers
    Adoptium Marketplace
    Mockup
    

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76. Migrate now
    

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77. This is a very very very long gag
    @hendrikEbbers
    Migrating to JDK 17
    • Oracle provides a migration guide:
    
    
    • Signi
    fi
    cant Changes in the JDK
    
    
    • Preparing For Migration
    
    
    • Migrating From JDK 8 to Later JDK Releases
    https://docs.oracle.com/en/java/javase/17/migrate/index.html
    https://bit.ly/3k224YD
    

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78. This is a very very very long gag
    @hendrikEbbers
    Migrating to JDK 17
    • Download JDK 17
    
    
    • Run your program before recompiling
    
    
    • Update 3rd-party libraries
    
    
    • Compile your application if needed
    
    
    • Run jdeps on your code
    

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79. This is a very very very long gag
    @hendrikEbbers
    The (evil) private APIs
    • Java 17 introduced JEP 403: Strongly Encapsulate JDK
    Internals
    
    
    • It will no longer be possible to relax the strong
    encapsulation of internal elements via a single
    command-line option, as was possible in JDK 9
    through JDK 16.
    

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80. This is a very very very long gag
    @hendrikEbbers
    The (evil) private APIs
    • JDK 9 till JDK 15 defaults to --illegal-access=warn
    
    
    • JDK 16 defaults to --illegal-access=deny
    
    
    • JDK 17 disables permit, warn & debug values for illegal-
    access option
    
    
    • It is still possible to use --add-opens or the Add-Opens
    manifest attribute
    
    
    

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81. This is a very very very long gag
    @hendrikEbbers
    Migrating to JDK 17
    • Next to the new timeline the new release model
    added some additional points
    
    
    • Deprecated code was removed from Java
    
    
    • @Deprecated has additional information
    

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82. This is a very very very long gag
    @hendrikEbbers
    Migrating to JDK 17
    A value of true indicates intent to
    remove the annotated program
    element in a future version.
    
    
    @Deprecated(forRemoval = true)
    

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83. This is a very very very long gag
    @hendrikEbbers
    Migrating to JDK 17
    • Several APIs were already removed between Java 8
    and Java 11:
    
    
    • CORBA
    
    
    • JAXB
    
    
    • Java Enterprise Annotations
    

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84. This is a very very very long gag
    @hendrikEbbers
    Check removed APIs
    • The Java Version Almanac contains all information
    that you need
    
    
    • Open source service by Mark Hoffmann
    
    
    • Support any 2 releases
    
    
    https://javaalmanac.io/jdk/17/apidiff/11/
    https://bit.ly/3z2Bqmv
    

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85. @hendrikEbbers
    Check all removed
    modifications
    

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86. This is a very very very long gag
    @hendrikEbbers
    Missing tools
    • You might miss some tools
    
    
    • WebStart and Applet support is gone
    
    
    • Check open source solution at
    openwebstart.com
    

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87. This is a very very very long gag
    @hendrikEbbers
    Check for usage of private API
    • We can't say that often enough
    
    
    • Check your code for any usage
    
    
    • Many online resources for individual issues
    ... or consultancy
    

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88. This is a very very very long gag
    @hendrikEbbers
    Migrating to a different Vendor
    • Maybe you want to migrate to a different OpenJDK
    based distribution
    
    
    • Since all are based on OpenJDK and mostly all are TCK
    checked a switch should be super easy...
    you do Have a support subscription
    for Java versions in production ?
    As you can imagine there are exceptions...
    

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89. This is a very very very long gag
    @hendrikEbbers
    Migrating to a different Vendor
    • There are still some minor differences distributions
    
    
    • As an example Oracle JDK uses a different font in
    Swing than the OpenJDK does
    
    
    • Adoptium provides an migration guide:
    

    https://adoptium.net/migration.html
    https://bit.ly/3tBroI1
    

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90. Stay safe & healthy
    

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91. @hendrikEbbers
    dev.karakun.com
    

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