Riena onrap econ-2011

© 2002 IBM Corporation

Confidential | Date | Other Information, if necessary März 23, 2011 Copyright © 2011 compeople AG, Made available under the Eclipse Public License v 1.0

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Christian Campo EclipseCon 2011 – March 22nd

Riena/RCP Applications in the Web using RAP

Copyright © 2011 compeople AG, Made available under the Eclipse Public License v 1.0

What is Riena again ?

§  RCP based Framework §  Client / Server Applications

§  Remote OSGi Service Support

§  End-user focused Navigation Concept

§  Promotes the separation of View and ViewController

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Copyright © 2011 compeople AG, Made available under the Eclipse Public License v 1.0 3

End-user focused Navigation Concept ?


RCP started as the Eclipse IDE

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RCP – Apps

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UI Concepts used in Riena

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UI Concepts for Views (=Workarea)

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•  Model

•  Data modeled in POJO or JavaBeans •  View

•  Widgets

•  Layout

•  Colors, Fonts

•  ActionListener, SelectionListener, DoubleClickListener

•  Databinding Calls

•  use of Services (DI ?, OSGi Services)

•  Model

•  Data modeled in POJO or JavaBeans •  View

•  Widgets

•  Layout

•  Colors, Fonts

•  Controller

•  ActionListener, SelectionListener, DoubleClickListener

•  Databinding Calls

•  use of Services (DI ?, OSGi Services)


Many implementation of the same concept

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Riena is also ...

§  Equinox Security Support for Client / Server Environment

§  Aimed at large Applications

§  Avoid Boilerplate Code §  Make reoccurring tasks simple

§  Manage the overall UI structure of the application §  Promotes the use of Dependency Injection for Services and

Extensions using Annotations and API

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What is RAP again ?

§  RCP, JFace and Workbench for Webapplications

§  Goals §  Any RCP App can be run in a Browser §  Single-sourcing (same source for desktop and web)

§  By default a desktop client with a browser look

§  Themeable

§  API to convert Singletons into Session-Singletons

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What is RAP again ?

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Bring Riena and RAP together


Scalability – RCP/Riena

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Browser Browser

Browser Browser RCP/Riena

Client

•  one Session per JVM •  many RCP Riena Clients •  maintains Client state

Riena Server

stateless Services

•  many worker threads •  stateless Services •  calls can take several

seconds

remote Service Calls


Scalability – RCP/Riena + RAP

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Browser Browser

Browser Browser

Browser

RAP Server

Session

•  many Browser Clients

Session Session

Session Session

Riena Server

stateless Services

•  one Session per User •  short and quick calls •  stateful •  maintains Client state •  runs RCP Client code

•  many worker threads •  stateless Services •  calls can take several

seconds


Moving Client Code to the Webcontainer

§  Identify all Singletons §  Some are REAL Singletons (ImageCache)

§  Some need to become SessionSingletons

§  Create Fragments for RCP/RAP specific code §  Create Facades to call one of the specific impl. at runtime

§  Local (Client) OSGi Services §  should not maintain state

§  should be reentrant

§  If you are NOT on the UI Thread, its hard to get the correct Display instance i.e. in Jobs. (one Display instance per user)

§  The GOAL is to SingleSource ! (one source for RCP and RAP)

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How to convert Singletons into SessionSingletons

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public MySingleton { private static MySingleton instance = new MySingleton(); public static MySingleton getInstance() { return instance; } }

public MySingleton extends SessionSingletonBase { private static MySingleton instance; public static MySingleton getInstance() { return (MySingleton)super.getInstance(MySingleton.class); } }

RCP RAP

public MySingleton { private static SingletonProvider<MySingleton> ME = new SessionSingletonProvider<MySingleton>(MySingleton.class); public static MySingleton getInstance() { return ME.getInstance(MySingleton.class); } }

Riena


Creating Facades

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•  Sometimes you need different code on RCP and RAP •  Use a facade to abstract that •  Put the platform specific code in a fragment

public class MyFacade { private static MyFacade instance = FacadeFactory.getFacade(MyFacade.class); public static MyFacade getInstance() { return instance; } public abstract String getText(Text text); }

Riena

public class MyFacadeRAP extends MyFacade { public String getText(Text text) { ...... } }

public class MyFacadeRCP extends MyFacade { public String getText(Text text) { .... } }

// your code using the facades MyFacade.getInstance().getText(myTextField);


Moving Riena Client to a Webcontainer

§  Session -> SessionSingleton §  NavigationTreeModel

§  Workarea (managing the Views attached to Navigation Tree Leafs)

§  Security (logged User, Permissions, Sessionid)

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One more thing....


UI Model Desktop -> Web

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Riena Client

Riena + RAP Client


Existing Web Application

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Bring the two together

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Navigation Tree

Menu

Subapplication Switcher


...even on the iPad thanks to RAP

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§  If you want to move your Desktop Client to Web §  Understand the problem areas

§  You need to possibly refactor and rework some of your code

§  SingleSourcing as much as possible

§  Contact §  http://www.eclipse.org/riena

§  http://wiki.eclipse.org/Riena_Project

§  [email protected]

§  RT BoF TONIGHT(Tuesday) 8:30 pm

Technology

Riena onrap econ-2011