open source cms, mdd, tdd: pros and cons

17.10.2010 JazzTeam.org Springsite.com Eclipse Foundation

Open Source CMS, MDD, TDD: Pros and Cons

Eclipse Texo, Seam, Alfresco, XForms,

Assembla

Real world project highlights

Дмитрий Горячконезависимый J2EE консультант, основатель команды JazzTeam,Eclipse committer

JazzTeam.org Springsite.com Eclipse Foundation2/43

00 Введение• О чём я расскажу

– Commercial outsourcing + open source– Коротко об enterprise Java CMSs– Презентация Texo Eclipse project – Alfresco introduction and tips– Open Source customization– Project highlights

• Постараюсь, чтобы рассказ был не сухим и был интересным не только для java разработчиков


Yageo.com

• Самый крупный производитель деталей для электроники

• Исторически сайт создавался компанией springsite.com

• Web 2.0 фаза


Yageo.com


Как появился заказчик

• Всегда вкладывай в людей, с которыми работаешь– Получена рекомендация

• У думающих людей не бывает плохого опыта – Экспертиза fits requirements (Epam CMS)

• Мой вопрос к Аркадию Добкину и его ответ про продуктовые и аутсорсинговые компании

• Мысль материальна– Заказчик из мира Open Source


Задачи• Integrate enterprise CMS• Contact management• Complicated search among all the

products (including competitors)• E-news, subscribers management• Products management (batch update too)• Web statistics• Support all possible roles, flows (editor,

admin, technical admin)• All should be friendly-administrated


Let us scrum

киевское метро


Особенности организации проекта


Особенности организации проекта

• Distributed scrum team• Customer is Open Source contributor

– Open for architecture changes– No fear, motivated to new– Not formal, friendly attitude

• Доверяйте интуиции– Первая оплата через 2 месяца после

начала проекта– Проект на 2 года с большой плотностью

инноваций весь срок


Why not to use Mind Maps for project documentation


Open for architecture changes

• Feel free to customize if need (coding)– Seam– Alfresco– Chiba (OS W3C XForms

implementation)– Hibernate– Eclipse Texo

• New phase of development (project Teneo)


No fear, motivated to new

• We need apply recursion into XForms and implement/built in recursive AJAX UI – let us invest time/money into it and gain knowledge on this area deeper– Конечно, позволял заказчик– 2 человека-месяца (с высокой

квалификацией)• Alfresco server debug• Complicated UI (hundreds of recursive controls,

which are widgets itself)


Recursive XSD widgets (xs:switch) AJAX based



Jazz Koktebel


Deployment


01 Технологии

• Alfresco & ECMSs• Texo• Seam• MDD & TDD


Alfresco notes• State of art. Wanna grow in Java

– study sources of Alfresco or Seam

• Modularity• All is node and services around

– Not only document management

– Everything related to node could be implemented

• Node type

• Flows, Web Forms and many other things

– extendable• XSD + XSLT (other templating

language) = XML, HTML, JS, Java, JSF – anything

• Web scripting• The same model as Epam CMS• It is possible to have XSD

describing layout

Крым, Симферополь,Детский джазовый концерт


Texo Eclipse project presentation

By springsite.com


Texo Eclipse project presentation

XML

JavaIn memory

JSON/Rest Web Services

Under development by me

GWT UI partPlanned

Your own formatTDD

XSD

ORM JPAHibernate

Eclipse link

EMF ECore


Seam• JSF• Creator of Hibernate• Contexts• Interceptors without AoP• Built in IoC• Rather new community• Sometimes it is hard to debug and

investigate what is wrong• Good community• State of art (contexts)


Seam• xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation=" http://jboss.com/products/seam/components http://jboss.com/products/seam/components-2.1.xsdhttp://jboss.com/products/seam/core http://jboss.com/products/seam/core-2.1.xsd http://jboss.com/products/seam/persistence http://jboss.com/products/seam/persistence-2.1.xsd http://jboss.com/products/seam/transaction http://jboss.com/products/seam/transaction-2.1.xsd http://jboss.com/products/seam/security http://jboss.com/products/seam/security-2.1.xsd http://jboss.com/products/seam/international http://jboss.com/products/seam/international-2.1.xsd http://jboss.com/products/seam/mail http://jboss.com/products/seam/mail-2.1.xsd http://jboss.com/products/seam/async http://jboss.com/products/seam/async-2.1.xsd">


Seam• <core:manager conversation-timeout="120000"

concurrent-request-timeout="500"conversation-id-parameter="cid" />

• <transaction:entity-transaction entity-manager="#{em}" />

• <persistence:entity-manager-factory name="yageo" />

• <persistence:managed-persistence-context name="em" auto-create="true" entity-manager-factory="#{yageo}" />

• <core:init transaction-management-enabled="false" />


XForms & chiba• Server and client

model• XML • XSD description of

structured form (even recursive – if your framework supports it )

• http://en.wikipedia.org/wiki/XForms

• Not only for internet• Could be MVC

From http://www.w3.org/MarkUp/Forms/


XForms & chiba• <xs:complexType abstract="true" name="PublicationType"><xs:sequence>

<xs:element name="Title" type="xs:string"/><xs:element maxOccurs="unbounded" minOccurs="0" name="Author" type="xs:string"/></xs:sequence>

</xs:complexType> • <xf:instance id="instance_0">

<yageo:Catalogue xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:yageo="http://www.yageocom/cms/article">

<yageo:Publication xsi:nil="true" xsi:type="BookType"><yageo:Title/><yageo:Author alf:prototype="true"/><yageo:ISBN/><yageo:Publisher/>

</yageo:Publication></yageo:Catalogue>

</xf:instance> • <xf:bind id="bind_0" xf:maxOccurs="1" xf:minOccurs="1" xf:nodeset="/yageo:Catalogue" xf:readonly="false()"

xf:required="false()"> • <xf:group id="alfresco-xforms-root-group" xf:appearance="full">

<xf:label id="label_0">Catalogue</xf:label><xf:group id="group_1" xf:appearance="repeated">

• <xf:trigger id="repeat_1-delete" xf:bind="bind_5"><xf:label id="label_25">delete selected</xf:label><xf:action id="C56">

<xf:delete id="delete_1" xf:at="xf:index('repeat_1')" xf:nodeset="/yageo:Catalogue/yageo:Publication[index('repeat_0')]/yageo:Author"/>


02 a little bit jump into project

В Крыму


Alfresco based TDD layouts flow

XSDLayout

content block

ECore

Texo

POJO JavaTexo meta

Html designdivs

TemplatesXslt/freemarket

Alfrescoweb forms

User

xml

Seam JSFResourceBundle,

Configs,Even web.xml

Restartpublish

etc


Texo based TDD flow

XSD Java POJO

EMF ECore Java Texo meta model

Java Texo Core

Templates

ORM

UI: JS jQuery widget

has access to all


Layouts flow

• Content block позволяют рассматривать новый функционал как UI плагины (виджеты). Автоматически поддержка CMS.


Project data exchange


Open Source contribution results• Eclipse Teneo (only ORM) > Texo

– One more Eclipse member

• Chiba changes contribution• Tries to discuss XForms standard changes• Seam forum participating

– Issue with contexts

• Alfresco changes– Dramatic

• WCM AJAX, layout to manage renditions, others

– A wish to become commercial committer – Contribution is sent but particularly ignored


Типы кастомизаций

• IoC, reflexion через файлы настроек• Скачать сырцы, что-то изменить,

переподложить под сервер• Сырцов нету

(multivalent.sourceforge.net). Decompile, adjust, compile

• Два последних варинта рискованны, если продукт будет долго развиваться.


Open Source model of project

• vertical model - OOP > reusable components > frameworks > open source > usage at next projects

• Motivation• Convenient way to touch with

partners– Ask them to join your OS project and

see what happens • All that is done for free in minutes, and

results in a week (productivity etc)


Open Source cons (то, что всплыло на проекте)

• Weak communities• Not always user

centric development• Смешение

технологий – for handy people

• Нет успокоения (но и нет старпёрства)

• Customizations, customizations, customizations

• Effort on R&DИз интерьера знаменитой 49 квартиры


Money?• Become committer with potential

customer• Long investments• Create popular industry/direction

(что сейчас делается в проекте Texo)

• Конференции, где бывают заказчики мира Java Open Source

• Independent consulting• Name• A way to start cooperation with

people immediately– For eclipse – not one month of

contribution– For sourceforge etc.

• Create user• Add to project• Develop Use Case

Способный customer facerМогу дать телефон


CMS• Good to have XSD support

– And recursion

• Good to become an entry point for all the management/admin pages

• Good to be node specific• Good to have web scripting• finally flows• And convenient management of renditions• E-CMS integration should allow to do (web.xml,

configs, bundles, localization) in the way you use wordpress


Bonus 00: j2ee vs ruby (basing on mashpit trainings)

• Context handling• Много времени для

вхождения новичкам• Хостинг дешевеет, clouding• Java is up to have closures• Byte code manipulators• Aop, IoC, OSGI• Simple syntax• Proved technology• MVC frameworks: spring,

struts, seam. Tons of views, TDD

• ORM and JPA• Ant, Maven• Good to have compilation

errorsСтенсил во Львове


Bonus 01: расширяемое программирование in Java

• Пляшем от полиморфизма• Generics• IoC(spring, self-made, seam, web.xml, context.xml)• Dependency injection (interceptors, chains), AoP (joints)• Patterns• Plugins (self made, OSGI, etc.)• WS-* (service mix, equinox, wsdl, JSON, REST)• Bytes manipulation (create classes on the flight,

interception on the flight – hard to debug)• Polymorphic systems (ruby frontend – java backend)• Class loading art• UI: widgets, web scripting• MDD, TDD, CMS took important role• Built in scripting


Выше показан один из возможных вариантов развития проекта и

команды. Нет единого рецепта.

Балкончик без лесенки

Open Source company?Product based company?Outsourcing?Trainings?

I do not know


Спасибо! Надеюсь, было интересно и полезно!

Вопросы?

Презентацию можно найти здесь jazzteam.org/devcamp10

• [email protected]• Zmicer.com


Opportunities• Вы желаете обучаться или работать на java• Участвовать в Open Source • Вам нравятся небольшие Scrum команды• Вы думаете об удалённой работе • Хотелось бы поработать за границей, но не знаете как• Тренинг повышения эффективности Java программиста Java Brains Reloading

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open source cms, mdd, tdd: pros and cons

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open source cms

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open source cons

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conseclipse texo

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