Java Platform Tradeoffs (Riga 2013)

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Alexey Fyodorov

Slides from Java Day Riga 2013 talk.

Technology Business

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Copyright © 2013, Oracle and/or its affiliates. All rights reserved.

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.

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Java Platform Tradeoffs
Алексей Фёдоров, Oracle
Java Day Riga
28 ноября 2013

3

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 Частота выхода апдейтов
 Фикс багов ломает совместимость
 История про Substring

 Совместимость как груз тянущий вниз

Agenda

 История о неизвестных отцах

 GUI: Нативный или универсальный?
 История про Beep
 Как быть хитрому лицензиату?

4

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Сюжет 1
Апдейты: часто или редко?

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Обновления Java и политика

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Сюжет 2
Исправление багов или совместимость?

8

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Протокол взаимодействия
API spec
(aka Javadoc)

JLS 8

JSR 337

Спецификация конкретной
версии платформы Java
играет роль протокола!
JVMS 8

Standalone
documents
9

Copyright © 2013, Oracle and/or its affiliates. All rights reserved.

Какие изменения допустимы?
Предлагаемое изменение

Update

Major release

Добавить что-нибудь в Public API
(пакет / класс / метод / поле)

-

+

Удалить что-нибудь из Public API

-

-*

Добавить что-нибудь в Private API

+

+

Удалить что-нибудь из Private API

+**

+

Изменить спецификацию чего-нибудь

-

+**

Исправить ошибку (несоответствие поведения
требуемому в спецификации)

+**,***

+

* - @Deprecated, @Override
*** - см. следующий слайд
10

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** - проанализировать риски

Adding null key to empty TreeMap without
Comparator should throw NPE
Bug 5045147

11

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Bug 2188127

Adding null key to empty TreeMap without
Comparator should throw NPE
Bug 5045147

Bug-2-Bug
12

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Bug 2188127

Сюжет 3
String.substring()

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14

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15

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16

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Since JDK 7u6
17

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Performance vs. Memory

18

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Сюжет 4
Совместимость или новые фичи?

19

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20

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21

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Сюжет 5
Неизвестные отцы

22

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23

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24

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25

Copyright © 2013, Oracle and/or its affiliates. All rights reserved.

26

Copyright © 2013, Oracle and/or its affiliates. All rights reserved.

Сюжет 6
GUI: Нативный или универсальный?

27

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28

Copyright © 2013, Oracle and/or its affiliates. All rights reserved.

Сюжет 7
Toolkit.beep()

29

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30

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Java 7

31

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Java 7

Java 8

32

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Сюжет 8
История о хитром лицензиате

33

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34

Copyright © 2013, Oracle and/or its affiliates. All rights reserved.

Выводы
 Большинство tradeoff’ов связаны с совместимостью
– в том или ином её смысле
 Имеющиеся риски трудно оценивать

 Разные риски в update releases и в major updates
 Java двигается в Embedded

– Больше различий в поведении

35

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Q&A
36

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Мои контакты
 @23derevo
 alexey.x.fedorov@oracle.com

 fyodorov.spbu@gmail.com
 Skype: fyodorov.spbu

 http://about.me/alexey.fyodorov

37

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Designing for cloud user experiences is the new customer imperative. These experiences must be simple. They must respond to new work styles in a Bring-Your-Own-Device environment. They must adapt to different form factors, different layouts, and even different gestures. Learn how the Oracle Applications User Experience team conducted research that drove the design of Oracle’s new simplified user interface strategy. Talk to one of the lead design strategists, Aylin Uysal, who is actively shaping what Oracle will be tackling next in cloud user experiences.

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Beim letzten deutschen Perlworkshop haben wir den Mangel an einsatzbereiten "Produkte" als ein Marketingproblem von Perl identifiziert. Wir haben zwar eine große Auswahl an möglichen Lösungen, aber für klassische Aufgabenstellungen wie Blog, CMS, Shop usw. fehlen die echten "Produkte" um mit anderen Programmiersprachen konkurrieren zu können. Wir wollen das für den Bereich eCommerce/Onlineshop ändern und gestalten die altgediente Perlsoftware Interchange von Grund auf neu und planen ein fertiges, einfach zu installierendes Produkt zur Verfügung zu stellen. Dabei kommt natürlich "Modernes Perl" zum Einsatz, z.B. Moo, DBIx::Class und Dancer. Dieser Vortrag berichtet über den aktuellen Stand der Dinge.

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Java Platform Tradeoffs (Riga 2013)

2. 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. 2 Copyright © 2013, Oracle and/or its affiliates. All rights reserved.

4.  Частота выхода апдейтов  Фикс багов ломает совместимость  История про Substring  Совместимость как груз тянущий вниз Agenda  История о неизвестных отцах  GUI: Нативный или универсальный?  История про Beep  Как быть хитрому лицензиату? 4 Copyright © 2013, Oracle and/or its affiliates. All rights reserved.

9. Протокол взаимодействия API spec (aka Javadoc) JLS 8 JSR 337 Спецификация конкретной версии платформы Java играет роль протокола! JVMS 8 Standalone documents 9 Copyright © 2013, Oracle and/or its affiliates. All rights reserved.

10. Какие изменения допустимы? Предлагаемое изменение Update Major release Добавить что-нибудь в Public API (пакет / класс / метод / поле) - + Удалить что-нибудь из Public API - -* Добавить что-нибудь в Private API + + Удалить что-нибудь из Private API +** + Изменить спецификацию чего-нибудь - +** Исправить ошибку (несоответствие поведения требуемому в спецификации) +**,*** + * - @Deprecated, @Override *** - см. следующий слайд 10 Copyright © 2013, Oracle and/or its affiliates. All rights reserved. ** - проанализировать риски

35. Выводы  Большинство tradeoff’ов связаны с совместимостью – в том или ином её смысле  Имеющиеся риски трудно оценивать  Разные риски в update releases и в major updates  Java двигается в Embedded – Больше различий в поведении 35 Copyright © 2013, Oracle and/or its affiliates. All rights reserved.

37. Мои контакты  @23derevo  alexey.x.fedorov@oracle.com  fyodorov.spbu@gmail.com  Skype: fyodorov.spbu  http://about.me/alexey.fyodorov 37 Copyright © 2013, Oracle and/or its affiliates. All rights reserved.

Java Platform Tradeoffs (Riga 2013)

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