Riena onrap econ-2011

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Riena/RCP Applications in the Web using RAP

Christian Campo
EclipseCon 2011 – March 22nd

Confidential | Date | Other Information, if necessary
März 23, 2011 © 2002 IBM Corporation
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

Copyright © 2011 compeople AG, Made available under the Eclipse Public License v 1.0 2

End-user focused Navigation Concept ?


RCP started as the Eclipse IDE


RCP – Apps


UI Concepts used in Riena


UI Concepts for Views (=Workarea)

•  Model
•  Data modeled in POJO or JavaBeans
•  View
•  Widgets
•  Layout
•  Colors, Fonts
•  Controller
•  ActionListener, SelectionListener, DoubleClickListener
•  Databinding Calls
ActionListener, SelectionListener, DoubleClickListener
•  use of Services (DI ?, OSGi Services)
Databinding Calls
•  use of Services (DI ?, OSGi Services)


Many implementation of the same concept


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


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


What is RAP again ?


Bring Riena and RAP together


Scalability – RCP/Riena

Riena Server
Browser
Browser remote Service Calls
Browser stateless Services
RCP/Riena
Browser
Client

•  one Session per JVM •  many worker threads
•  many RCP Riena Clients •  stateless Services
•  maintains Client state •  calls can take several
seconds


Scalability – RCP/Riena + RAP

RAP Server Riena Server
Browser
Browser
Browser Session stateless Services
Browser Session
Browser Session
Session
Session

•  many Browser Clients •  one Session per User •  many worker threads
•  short and quick calls •  stateless Services
•  stateful •  calls can take several
•  maintains Client state seconds
•  runs RCP Client code


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)


How to convert Singletons into SessionSingletons
RCP
RAP
public MySingleton {
public MySingleton extends SessionSingletonBase {
private static MySingleton instance = new MySingleton();
private static MySingleton instance;
public static MySingleton getInstance() {
return instance; public static MySingleton getInstance() {
} return (MySingleton)super.getInstance(MySingleton.class);
} }
}
public MySingleton {
Riena
private static SingletonProvider<MySingleton> ME = new
SessionSingletonProvider<MySingleton>(MySingleton.class);

public static MySingleton getInstance() {
return ME.getInstance(MySingleton.class);
}
}


Creating Facades
Riena
// your code using the facades
public class MyFacade {
MyFacade.getInstance().getText(myTextField);
•  Sometimes you need different code on RCP and RAP
•  Use a facade to abstract that
•  Put the platform specific codeinstance = FacadeFactory.getFacade(MyFacade.class);
private static MyFacade in a fragment

public static MyFacade getInstance() {
return instance;
}

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


Moving Riena Client to a Webcontainer

§  Session -> SessionSingleton
§  NavigationTreeModel
§  Workarea (managing the Views attached to Navigation Tree Leafs)
§  Security (logged User, Permissions, Sessionid)


One more thing....


UI Model Desktop -> Web Riena + RAP Client

Riena Client


Existing Web Application


Bring the two together Menu

Navigation
Tree
Subapplication
Switcher


...even on the iPad thanks to RAP


§  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
§  riena-dev@eclipse.org
§  RT BoF TONIGHT(Tuesday) 8:30 pm

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

Riena onrap econ-2011

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