OpenJDK プロジェクトはかなり注目されていますが、どうやって参加出来るかを悩んでいる方はいっぱいいらっしゃいます。このセッションで、OpenJDK のイロハをカバーします。ソースコードの入手から、バグの修正などの貢献まで簡単にプロセスをまとめます。OpenJDK のプロジェクトをより理解したい方、あるいは、自分で貢献したいと思う方は是非ご覧ください.。

3. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
OpenJDK: How to Join In on All the Fun
CCC E2
David Buck
Principal Member of Technical Staff
Java Platform Group
November 18th, 2017
Confidential – Oracle Internal/Restricted/Highly Restricted 3

4. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
Safe Harbor Statement
The following is intended to outline our general product direction. It is intended for
information purposes only, and may not be incorporated into any contract. It is not a
commitment to deliver any material, code, or functionality, and should not be relied upon
in making purchasing decisions. The development, release, and timing of any features or
functionality described for Oracle’s products remains at the sole discretion of Oracle.
Confidential – Oracle Internal/Restricted/Highly Restricted 4

5. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
• JVM Sustaining Engineer
• OpenJDK 8 Update Project
Maintainer
• JavaOne Rock Star
• Co-author of Oracle WebLogic
Server 11g 構築・運用ガイド
• @DavidBuckJP
• https://blogs.oracle.com/buck/
Who am I?

6. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
Who are you?
• OpenJDK に貢献したい人
• OpenJDK の玄人
– fastdebug ビルド
– カスタム ビルド
Confidential – Oracle Internal/Restricted/Highly Restricted 6

7. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
セッションの目的
• JDK コードを弄て、ビルドする
• OpenJDK へコードを貢献する
• OpenJDK の進捗を追跡する
Confidential – Oracle Internal/Restricted/Highly Restricted 7

8. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
Agenda
• OpenJDK プロジェクト
– 歴史、目的、単語
• ツールや技術
– ソースの入手、ビルド、テスト、レビューの準備など
• プロセス
– コード レビュー、プロジェクト、ロールなど
Confidential – Oracle Internal/Restricted/Highly Restricted 8

9. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
OpenJDK プロジェクト
Confidential – Oracle Internal/Restricted/Highly Restricted 9

10. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
OpenJDK とは?
• Java SE のオープンソースの実装Open source (GPL2 / L.E.) implementation
of Java SE
• JDK 7 以降の Reference implementation
• 多数の単体プロジェクトで構造
Confidential – Oracle Internal/Restricted/Highly Restricted 10

11. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
なぜ?
• Java の普及の推進
• ハードの売り上げの推進
Confidential – Oracle Internal/Restricted/Highly Restricted 11

12. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
OpenJDK プロジェクト
歴史
Confidential – Oracle Internal/Restricted/Highly Restricted 12

13. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
OpenJDK の前
• Sun Community Source License (SCSL)
• Java Research License (JRL)
Confidential – Oracle Internal/Restricted/Highly Restricted 13

14. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
The Java Trap （Java の罠）
Confidential – Oracle Internal/Restricted/Highly Restricted 14

15. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
タイムライン
• JavaOne 2006 で発表された
• ２００６年１１月 javac と HotSpot のコードのリリース
• ２００７年の５月で殆どの残りがリリースされた
Confidential – Oracle Internal/Restricted/Highly Restricted 15

16. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
殆ど?
• フォントレンダリング -> freetype
• カラー管理システム-> lcms
• 音 -> Gervill
• アンチエリアジング -> (Ductus -> Marlin)
Confidential – Oracle Internal/Restricted/Highly Restricted 16

17. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
殆ど?
• OpenJDK 6 b10 から本当の OSS でビルドすることが出来た
Confidential – Oracle Internal/Restricted/Highly Restricted 17

18. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
二バージョン物語
• 初めての OpenJDK のリリース: JDK 7
• OpenJDK 6 は?
• ２００６年の１２月に Sun JDK 6 がリリースされた
Confidential – Oracle Internal/Restricted/Highly Restricted 18

19. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. | Confidential – Oracle Internal/Restricted/Highly Restricted 19

20. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
OpenJDK とは？
Confidential – Oracle Internal/Restricted/Highly Restricted 20

21. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
OpenJDK ではない物
Confidential – Oracle Internal/Restricted/Highly Restricted 21

22. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
OpenJDK != IcedTea
• まだリリースされていない部分を OSS でカバー
– Java SE
– デプロイ機能
• Java Web Start
• Browser plugins
• 鶏が先か卵が先か
– OpenJDK をビルドするには SunJDK が必要
Confidential – Oracle Internal/Restricted/Highly Restricted 22

23. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
OpenJDK != Java Community Process
• ＪＣＰは 1998 年からあった
• 仕様を確定するプロセス (JSRs)
Confidential – Oracle Internal/Restricted/Highly Restricted 23

24. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
OpenJDK != OracleJDK
• OracleJDK
– OpenJDK + クローズドソース ★
– オラクルからサポートを購入出来る
★ クローズドソースとは
– デプロイの技術(Plug-in, Java Web Start)
– 有料機能 (Flight Recorder, usage tracker, MSI installer)
Confidential – Oracle Internal/Restricted/Highly Restricted 24

25. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
OpenJDK Projects
• ポート
• 新たな機能
• 将来のＪＤＫのメージャーバージョン
• リリース済みのアップデート
• その他
Confidential – Oracle Internal/Restricted/Highly Restricted 25

26. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
OpenJDK Projects
Confidential – Oracle Internal/Restricted/Highly Restricted 26

27. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
ツール / 技術
Confidential – Oracle Internal/Restricted/Highly Restricted 27

28. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
Mercurial のイロハ
Confidential – Oracle Internal/Restricted/Highly Restricted 28
By Cali Mastny and Matt Mackall (http://www.selenic.com/hg-logo/) [GPLv2 (https://www.gnu.org/licenses/old-licenses/gpl-2.0.html)], via Wikimedia Commons

29. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
Mercurial とは?
Confidential – Oracle Internal/Restricted/Highly Restricted 29

30. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
“Mercurial is a free, distributed source
control management tool.“
（Mercurial は無料の分散型のソース
管理システムである。）
– https://www.mercurial-scm.org/
Confidential – Oracle Internal/Restricted/Highly Restricted 30

31. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
名前の意味は?
Confidential – Oracle Internal/Restricted/Highly Restricted 31

32. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
早い、液体、柔軟性
Confidential – Oracle Internal/Restricted/Highly Restricted 32
By Bionerd (Own work) [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC BY 3.0 (http://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons

33. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
悪い知らせ
GIT ではない
良い知らせ
ＧＩＴとあまり変わらない
Confidential – Oracle Internal/Restricted/Highly Restricted 33
良い知らせと悪い知らせ

34. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
hg ≈ git
Confidential – Oracle Internal/Restricted/Highly Restricted 34

35. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
分散バージョン管理
Confidential – Oracle Internal/Restricted/Highly Restricted 35
By Axaluss - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=20053251

36. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
• clone
• commit
• log
• push
• pull
• defpath
• status
• diff
• out
• add
Confidential – Oracle Internal/Restricted/Highly Restricted 36
上位の10つのコマンド

37. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
Revision IDs
13365:862767b4c105
Confidential – Oracle Internal/Restricted/Highly Restricted 37

38. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
Revision IDs
13365:862767b4c105
ローカル グローバル
Confidential – Oracle Internal/Restricted/Highly Restricted 38

39. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
自分の貢献を上へ push
Confidential – Oracle Internal/Restricted/Highly Restricted 39
By Pearson Scott Foresman - Archives of Pearson Scott Foresman, donated to the Wikimedia Foundation
This file has been extracted from another file: PSF P-730002.png, Public Domain,
https://commons.wikimedia.org/w/index.php?curid=3947194

40. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
他の人の変更を pull
Confidential – Oracle Internal/Restricted/Highly Restricted 40
Viking-nl at Dutch Wikipedia [GFDL (http://www.gnu.org/copyleft/fdl.html)
or CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/)],via Wikimedia Commons

41. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
ソースツリー
Confidential – Oracle Internal/Restricted/Highly Restricted 41

42. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
ソースツリー
Confidential – Oracle Internal/Restricted/Highly Restricted 42

43. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
ソースツリー
Confidential – Oracle Internal/Restricted/Highly Restricted 43

44. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
Forests （森）
Confidential – Oracle Internal/Restricted/Highly Restricted 44

45. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
Forests
Confidential – Oracle Internal/Restricted/Highly Restricted 45

46. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
Forests
Confidential – Oracle Internal/Restricted/Highly Restricted 46

47. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
Forest
• JDK をビルド出来る
• Forest の入手
– Forest のロートを clone
– get_source.sh スクリプトを実行
Confidential – Oracle Internal/Restricted/Highly Restricted 47

48. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. | Confidential – Oracle Internal/Restricted/Highly Restricted 48

49. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
JDK 8 以降
素晴らしい！
JDK 6 と JDK 7
素晴らしくない。。。
Confidential – Oracle Internal/Restricted/Highly Restricted 49
ビルド方法

50. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
ビルド（JDK8 以降）
sh configure
make
Confidential – Oracle Internal/Restricted/Highly Restricted 50

51. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
Configure を実行
• 足りないパッケージを検出して、入手方法を教えてくれる
• すべてのプラットフォーム (はい、Windows でも)
• 重要なオプション
– Debug ビルド (--enable-debug)
– ccache 無効化(--disable-ccache)
– Bookstrap JDK のパース (--with-boot-jdk)
– configure スクリプトの debug 出力 (--debug-configure)
Confidential – Oracle Internal/Restricted/Highly Restricted 51

52. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
何かたりない?
Confidential – Oracle Internal/Restricted/Highly Restricted 52

53. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
$ build/linux-x86_64-normal-
server-release/jdk/bin/java -
version
openjdk version "1.8.0-internal"
OpenJDK Runtime Environment
(build 1.8.0-internal-
dbuck_2017_10_02_10_55-b00)
OpenJDK 64-Bit Server VM (build
25.71-b00, mixed mode)
$ build/linux-x86_64-normal-
server-release/jdk/bin/java -
version
Hello JavaOne 2017!
openjdk version "1.8.0-internal"
OpenJDK Runtime Environment
(build 1.8.0-internal-
dbuck_2017_10_02_10_55-b00)
OpenJDK 64-Bit Server VM (build
25.71-b00, mixed mode)
Confidential – Oracle Internal/Restricted/Highly Restricted 53
何か変更しよう!

54. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
$ build/linux-x86_64-normal-
server-release/jdk/bin/java -
version
openjdk version "1.8.0-internal"
OpenJDK Runtime Environment
(build 1.8.0-internal-
dbuck_2017_10_02_10_55-b00)
OpenJDK 64-Bit Server VM (build
25.71-b00, mixed mode)
$ build/linux-x86_64-normal-
server-release/jdk/bin/java -
version
Hello JavaOne 2017!
openjdk version "1.8.0-internal"
OpenJDK Runtime Environment
(build 1.8.0-internal-
dbuck_2017_10_02_10_55-b00)
OpenJDK 64-Bit Server VM (build
25.71-b00, mixed mode)
Confidential – Oracle Internal/Restricted/Highly Restricted 54
何か変更しよう!

55. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
テストケース
• 殆どの変更はテストケースが必要となる
– 新しい機能をテストする
– バグの修正をテストする
• Jtreg というテストフレームワークが一番利用されている
• 既存のテストを変更するだけで十分である場合が多い
Confidential – Oracle Internal/Restricted/Highly Restricted 55

56. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
プロセス / ルール
Confidential – Oracle Internal/Restricted/Highly Restricted 56

57. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
何をしたい?
• バグを直す？
• 新しい機能を追加する？
Confidential – Oracle Internal/Restricted/Highly Restricted 57

58. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
何をしたい?
• バグを直す？
• 新しい機能を追加する？
Confidential – Oracle Internal/Restricted/Highly Restricted 58

59. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
２バグシステムの物語
• bugs.java.com
• JDK Bug System
Confidential – Oracle Internal/Restricted/Highly Restricted 59

60. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
２バグシステムのインタフェースの物語
• bugs.java.com
• JDK Bug System
Confidential – Oracle Internal/Restricted/Highly Restricted 60

61. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
bugs.java.com
Confidential – Oracle Internal/Restricted/Highly Restricted 61

62. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
bugs.java.com
• ユーザ向け（貢献する人ではなく）
• 単純
– 検索機能が乏しい
– 情報の一部しか表示されない
• バグの登録は誰でも出来る
Confidential – Oracle Internal/Restricted/Highly Restricted 62

63. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
JDK Bug System (JBS)
Confidential – Oracle Internal/Restricted/Highly Restricted 63

64. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
JDK Bug System (JBS)
二つのユーザの種類に利用されている
• OpenJDK のコミュニティ
• Oracle Corporation
Confidential – Oracle Internal/Restricted/Highly Restricted 64

65. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
JDK Bug System (JBS)
Confidential – Oracle Internal/Restricted/Highly Restricted 65
Oracle OpenJDK

66. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
Jira ベース
• カスタマイズを避けた
• 重要な違い
– Backports / Fixed Version
– Bug 検索機能の拡張
Confidential – Oracle Internal/Restricted/Highly Restricted 66
JDK Bug System (JBS)

67. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
JDK Bug System (JBS)
Confidential – Oracle Internal/Restricted/Highly Restricted 67
Backports / Fixed Version

68. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
JDK Bug System (JBS)
Confidential – Oracle Internal/Restricted/Highly Restricted 68
Backports / Fixed Version

69. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
JDK Bug System (JBS)
• regexVersion
– fixVersion in regexVersion("8.*")
– fixVersion in regexVersion("[5-8].*|tbd.*")
• regexLabel
– regexlabel("7u60-critical.*")
– regexLabel("release-note.*")
Confidential – Oracle Internal/Restricted/Highly Restricted 69
Bug Search Extensions

70. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
Jiraは誰アクセス出来る？
Confidential – Oracle Internal/Restricted/Highly Restricted 70

71. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
Jiraは誰アクセス出来る？
誰でも！
Confidential – Oracle Internal/Restricted/Highly Restricted 71

72. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
• OpenJDK の ID がない場合Read-
only
• Oracle の社内のバグ
– セキュリティの脆弱性
– 有料機能
– お客様情報を含むレポート
Confidential – Oracle Internal/Restricted/Highly Restricted 72
でも、やっぱり人によって…

73. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
新規のレポートを作るには？
OpenJDK ID がない場合
• OpenJDK のメールエイリアスで要求する
• bugs.java.com でレポートを登録する
Confidential – Oracle Internal/Restricted/Highly Restricted 73

74. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
Java Incidents
• “web bugs”
• チェックされていない
• 公開されていない
JDK
• 公開されている
• チェック済み
Confidential – Oracle Internal/Restricted/Highly Restricted 74
Java Incidents プロジェクト

75. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
Java Incidents
• “web bugs”
• チェックされていない
• 公開されていない
JDK
• 公開されている
• チェック済み
Confidential – Oracle Internal/Restricted/Highly Restricted 75
Java Incidents プロジェクト

76. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
悩んでいれば
適切なメールエイリアスで質問すること！
Confidential – Oracle Internal/Restricted/Highly Restricted 76

77. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
悩んでいれば
適切なメールエイリアスで質問すること！
Confidential – Oracle Internal/Restricted/Highly Restricted 77

78. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
OpenJDK メースエイリアス
• オープン参加
• アーカイブされている
• Digest （まとめ）の機能
• メールを送る前に登録することが推奨
Confidential – Oracle Internal/Restricted/Highly Restricted 78

79. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
悩んでいれば
適切なメールエイリアスで質問すること！
Confidential – Oracle Internal/Restricted/Highly Restricted 79

80. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
悩んでいれば
適切なメールエイリアスで質問すること！
Confidential – Oracle Internal/Restricted/Highly Restricted 80

81. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
適切なメールエイリアス
Confidential – Oracle Internal/Restricted/Highly Restricted 81

82. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
適切なメールエイリアス
遠慮せずにエイリアスで聞いて下さい。
必要に応じて妥当なエイリアスを教えます。
Confidential – Oracle Internal/Restricted/Highly Restricted 82

83. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
8u-dev の返事を待っている人
Confidential – Oracle Internal/Restricted/Highly Restricted 83
By Sklmsta - Own work, CC0, https://commons.wikimedia.org/w/index.php?curid=9896470

84. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
ソースを pull して、バグを直す!
Confidential – Oracle Internal/Restricted/Highly Restricted 84
By Everaldo Coelho and YellowIcon; - All Crystal Clear icons were posted by the author as LGPL on kde-look;,
LGPL, https://commons.wikimedia.org/w/index.php?curid=664637

85. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
OpenJDK へ修正を貢献する
• パブリックのコードレビュー
• 修正を Push （或いは 誰かに Push して貰う）
Confidential – Oracle Internal/Restricted/Highly Restricted 85

86. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
コードレビュー
• Webrev を作成する
• cr.openjdk.java.net で webrev を公開する
• 適切なエイリアスへコードレビューの要求を送る
• 質問を回答し、コメントにお応じて修正を変更する
• Reviewer から承認を貰ったら、push
Confidential – Oracle Internal/Restricted/Highly Restricted 86

87. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
コードレビュー
• Webrev を作成する
• cr.openjdk.java.net で webrev を公開する
• 適切なエイリアスへコードレビューの要求を送る
• 質問を回答し、コメントにお応じて修正を変更する
• Reviewer から承認を貰ったら、push
Confidential – Oracle Internal/Restricted/Highly Restricted 87

88. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
コードレビュー
• Webrev を作成する
• cr.openjdk.java.net で webrev を公開する
• 適切なエイリアスへコードレビューの要求を送る
• 質問を回答し、コメントにお応じて修正を変更する
• Reviewer から承認を貰ったら、push
Confidential – Oracle Internal/Restricted/Highly Restricted 88

89. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
Reviewers
• “reviewer” != “Reviewer”
• プロジェクトやチームによって、必要な Reviewer の数が異なる
ヒント：コードレビューを要求するとき、必要な Reviewer の人数を確認出来る
Confidential – Oracle Internal/Restricted/Highly Restricted 89

90. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
変更（修正）を push する
• 直接に push するには committer 権限が必要
• Committer 権限を取得しても、オラクルの社員しか push 出来ないプロジェ
クトがある (JPRT)
• 必要に応じて sponsor (プッシュしてくれる人）を頼める
Confidential – Oracle Internal/Restricted/Highly Restricted 90

91. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
Committer?
Reviewer?
Confidential – Oracle Internal/Restricted/Highly Restricted 91

92. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
OpenJDK のロール
• Contributor
• Author
• Committer
• Reviewer
• Project lead
Confidential – Oracle Internal/Restricted/Highly Restricted 92

93. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
Contributor
• Oracle Contributor Agreement に同意した
• プッシュされた貢献が “Contributed-by”
Confidential – Oracle Internal/Restricted/Highly Restricted 93

94. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
Oracle Contributor Agreement
• http://www.oracle.com/technetwork/community/oca-486395.html からダ
ウンロード
• 印刷
• 記入
• サイン
• スキャン
• oracle-ca_us@oracle.com へ送る
Confidential – Oracle Internal/Restricted/Highly Restricted 94

95. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
Author
• １つのプロジェクトに３以上の新しい貢献を出した
• プロジェクトのリーダに要求する
• 投票はない
• OpenJDK ID が発行される
– JBS 書き込みアクセス
– cr.openjdk.java.net の home ディレクトリ
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Committer
• 殆どの HG repository へ push することが出来る
• 既存の committer にノミネートされる
• 投票が必要
• 目安: 12 新しい / 大きいな貢献
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Reviewer
• コードレビューで変更を承認することが出来る
• 既存の Reviewer にノミネートされる
– 目安: 40 新しい / 大きな貢献
– 結構難しい
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OpenJDK Members
• OpenJDK のグループ
• 新規プロジェクトの作成や委員会などの件について投票出来る
• OpenJDK ID の有無と違う話
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Committer であっても
Oracle の社員ではなければプッシュ出来ない HG repository がある
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JPRT
• “JDK Product Reliability Testing”
• ビルドと検証のインフラ
• JPRT でしか push 出来ない HG repository がある
• オラクルの社外からアクセスが不可能
• 必ずビルドが出来ることを保証する
• 公開されていないテストも多い
• いろいろなプラットフォームがある
• すべてのプラットフォームがあるわけではない
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JPRT
• “JDK Product Reliability Testing”
• ビルドと検証のインフラ
• JPRT でしか push 出来ない HG repository がある
• オラクルの社外からアクセスが不可能
• 必ずビルドが出来ることを保証する
• 公開されていないテストも多い
• いろいろなプラットフォームがある
• すべてのプラットフォームがあるわけではない
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Backports
• メインラインの開発プロジェクトに先に入れる必要がある
– (最新版で問題が再現する場合)
• Backports は committer / reviewer の資格としてカウントしない
• Update プロジェクトによって、管理する人（会社）がことなる
– JDK 6 -> Andrew Brygin <abrygin@azul.com>
– JDK 7 -> Andrew Haley <aph@redhat.com>
– JDK 8 -> and Sean Coffey and Robert Mckenna
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JDK 8 への Backport
すべての変更は承認が必要となる
• 要求テンプレートがある
• RFA != RFR
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Jigsaw パースの変更
• ファイルのパースだけが変更された
• ＪＤＫ ９ のパッチが自動的に JDK 8 用に変換するスクリプト (unshuffled)
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まとめ
• 遠慮なく質問してください
• お時間を頂く場合もございますが、ご了承ください
– 巨大のプロジェクト
– 変動が激しい
– 常にプロセスの最適化に最大限努力している
• 修正やコードを貢献しなくてもいい
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ありがとうございます！
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• OpenJDK Home Page
http://openjdk.java.net/
• FAQ
http://openjdk.java.net/faq/
• Developer's Guide
http://openjdk.java.net/guide/
• Mailing Lists
http://mail.openjdk.java.net/mailman/listinfo
• Bylaws
http://openjdk.java.net/bylaws
• Census
http://openjdk.java.net/census
• Mercurial: The Definitive Guide
http://hgbook.red-bean.com/read/
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参考資料

108. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
Safe Harbor Statement
The preceding is intended to outline our general product direction. It is intended for
information purposes only, and may not be incorporated into any contract. It is not a
commitment to deliver any material, code, or functionality, and should not be relied upon
in making purchasing decisions. The development, release, and timing of any features or
functionality described for Oracle’s products remains at the sole discretion of Oracle.
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