Eclipse - Single Source;Three Runtimes

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Presentation from <a>Suresh Krishna madhuvarsu</a> on the RCP, eRCP and RAP in the Redwood City DemoCamp.

Presentation from <a>Suresh Krishna madhuvarsu</a> on the RCP, eRCP and RAP in the Redwood City DemoCamp.

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  • 1. Single Source : Three Runtimes
    • Suresh Krishna
    • Oracle Inc.
    • [email_address]
    A tale of Desktop (RCP), Web (RAP) and Mobile (eRCP) applications.
  • 2. Motivation is to…
    • Understand the strengths and limitations of three runtimes (RCP, RAP and eRCP)
    • Leverage these Eclipse platforms for business solutions
    • “how much” is really free ?
  • 3.  
  • 4. Develop for Desktop; Get Web and Mobile app for Free* * conditions and refactoring apply
  • 5. Simple Application…
    • “Task Organizer” application is created using Eclipse RCP
    • Application is functionally simple
    • Can add, modify and delete the personal tasks
    • Data is populated from a simple in memory model; modified data is not persisted
    • Demonstrates the strengths and limitations of runtimes (RCP, RAP and eRCP)
  • 6. RCP – TaskOrganizer
    • Create a simple View with Eclipse RCP plugin wizard
    • Contains simple TableViewer, TaskView, Sorter and CellModifier
    • Productization is done with the icons, splash screen and the launcher name
    • Personal Organization is exported as product so that it can be distributed as standalone
  • 7. RCP – TaskOrganizer Code
    • TaskOrganizerApplication : Implements Application and defines the application's life cycle
    • ApplicationActionBarAdvisor : Manages the life cycle of actions added to windows
    • ApplicationWorkbenchAdvisor : Initializes the perspective
    • ApplicationWorkbenchWindowAdvisor : responsible for many of the visual aspects of windows (size, statusline, menubars, etc.)
    • Perspective : Contains the Personal Task Viewer that will be visible in the application
    • PersonalTaskView : Simple Table Viewer with data pre-populated from a model
  • 8. RCP – TaskOrganizer – Demo
  • 9. RAP – Overview
    • RAP allows you to build Ajax-enabled Web applications using the Eclipse development model.
    • Browser-side widget rendering is done with the qooxdoo Ajax library
    • Abstracts the JavaScript and allows you to work with the Java APIs to build RIAs.
    • Custom widget developers need to have JavaScript , qooxdoo , and RAP knowledge.
    • Client-side development allows for the embedding of client-side technologies like other JavaScript frameworks , Flash , and applets .
  • 10. RAP - Architecture
    • Special implementation of the SWT, JFace and Workbench, and, as such, is actually a subset of RCP.
    • RAP applications are accessed via standard browsers in the same way RCP applications are executed on the desktop environment.
  • 11. RAP - TaskOrganizer
    • Since RAP is an RCP subset, it cannot co-exist in the same Eclipse instance as RCP.
    • Download and set the RAP target platform; alternatively one can download the RAP SDK.
    • Refactor the code
      • Extension Points
      • Plugin Dependencies
      • Remove/Add/Modify classes
      • Define EntryPoint
    • Test with OSGi configuration
  • 12. RAP – TaskOrganizer (transformation)
    • Organize the RAP application plug-in dependencies.
      • org.eclipse.ui , add the RAP equivalent org.eclipse.rap.ui .
    • Look for the compile errors and correct them with compatible APIs, constants, etc.
      • Shell
      • SWT Style Bits
    • Modify or removed the functionality currently not supported in RAP (e.g., CellEditors).
      • As of now CellEditors are not supported in RAP
  • 13. RAP – TaskOrganizer (transformation)
    • An EntryPoint (org.eclipse.rap.ui.entrypoint) represents the main entry point for a RAP application (It can be compared with the main() method in SWT applications)
    • EntryPoint creates the UI with the help of the WorkbenchAdvisor , Initial Perspective, and ApplicationActionBarAdvisor .
    • URL <host>:<port>/rap?startup=<entrypointname>
    • As RAP uses the OSGi* as the server-side framework, you will want to launch the application with the OSGi framework.
    • OSGi framework includes a Jetty server and the startup ports can be configured.
    * The Equinox's OSGi framework component is the full implementation to the OSGi Core framework R4 specification.
  • 14. RAP – TaskOrganizer - Launch
  • 15. RAP – TaskOrganizer – Editing Capability * CellEditor replacement in the personal task organizer
  • 16. RAP – TaskOrganizer - Branding
    • Add org.eclipse.rap.ui.branding extension point
      • servletName: taskOrganizer :
        • Allows a user to access the application via localhost:9090/taskOrganizer, rather than /rap.
      • title: Personal Task Organizer :
        • Will be displayed as the title of the Web page in the browser, either in the title bar or the tab.
      • favicon: icons/alt_window_16.gif :
        • Available for use as part of the work done in Part 1, but if you have a logo of your own in an .ico file, use that, as many browsers only accept .ico for the favicon.
      • exitConfirmation: Do you want to Exit Personal Task Organizer? :
        • Will display in a dialog when the user closes his browser or navigates to another URL while running the application.
  • 17. RAP – TaskOrganizer - Branding
  • 18. RAP – TaskOrganizer - Theming
    • Theming is based on CSS and allows you to define colors, fonts, borders, margins, and images for the widgets.
    • Add the extension point org.eclipse.rap.ui.themes
    • Unfortunately, there is no documentation on what properties can be set on what widgets.
      • For example, the menu has its theme listed in Menu.theme.xml, the List in List.theme.xml; etc.
  • 19. RAP – TaskOrganizer – Before/After
  • 20. RAP – TaskOrganizer – Packaging
    • Deploy your application to a servlet container
    • Additional plug-ins must be bundled for deployment
    • ServletBridge is the connection between the OSGi framework and servlet container.
      • org.eclipse.equinox.servletbridge
      • org.eclipse.equinox.servletbridge.http
      • org.eclipse.equinox.http.servlet
      • org.eclipse.equinox.http.registry
      • javax.servlet
    • Crete a deploy script (war file, config creator, etc…)
    • Run the build script to create the necessary files for deployment
    • Deploy the WAR file to a servlet container (e.g. Tomcat)
  • 21. RAP – TaskOrganizer - Deploy
  • 22. Smart Phone (R)evolution…
    • Palm Centro/Treo
    • Black Berry
    • iPhone
    • Nokia N/E series, Communicator
    • Samsung BlackJack, SCH
    • Sony Ericsson P/W series
  • 23. eRCP – Overview
    • eRCP is a project — sponsored by IBM®, Nokia, and Motorola — that removes the desktop-oriented features of RCP.
    • Replaces the traditional frameworks to mobile (SWT -> eSWT; JFace -> eJface; Workbench -> eWorkbench; Update -> eUpdate)
    • SWT Mobile Extensions package to provide support for embedded UI features.
    • eSWT ties directly to the native GUI system. It employs native code to do this and is, therefore, platform-dependent.
    • Cannot run the eRCP GUI applications without having a port of eSWT and mobile extensions for the target platform.
  • 24. eRCP - Architecture Mobile Extensions : An optional package that provides UI elements commonly found on mobile devices.
  • 25. eRCP – Supported Platforms
    • 4 platforms for development and testing
      • Windows Desktop
      • Windows Mobile V5/6 Professional
      • Windows Mobile V5/6 Standard
      • WinCE V4.0 Professional
    • Windows Mobile and Windows CE platforms require actual device or the simulator to test the application
    • Windows Desktop provides a full eRCP environment; which makes it easy to develop and test the mobile applications on the desktops.
  • 26. eRCP – TaskOrganizer – Refactoring
    • Start with downloading the eRCP for Desktop runtime and set the target environment
    • Look for the compilation errors and change
      • Dependant plugins
        • Add org.eclipse.ercp.eworkbench
      • Extension points
        • Add org.eclipse.ercp.eworkbench.applications
        • Remove org.eclipse.core.runtime.applications
        • Remove org.eclipse.ui.perspectives
        • Remove org.eclipse.core.runtime.products
      • API changes
        • SelectionAdapter -> SelectionListener
        • Remove CellModifiers -> Not supported
        • Remove RCP related classes
  • 27. eRCP – TaskOrganizer – eWorkbench
    • eWorkbench does not have the Perspective model
    • An eRCP application does not have an IApplication or IEntryPoint as a starting point
    • eRCP app extends the eWorkbench instance and runs as child thread
    • eWorkbench shares its execution thread among all eRCP applications (allowing all the applications to run in a single JVM)
  • 28. eRCP – TaskOrganizer – Launch
    • Create a launch configuration using the application type as org.eclipse.ercp.eworkbench.eWorkbench .
  • 29. eRCP – TaskOrganizer – Deployment
    • Earlier release of Symbian OS (S80) has been discontinued and only a handful Windows mobile OS are supported
    • eRCP requires a JVM capable of supporting the CDC/FP v1.0 or later whereas majority of today's devices support only CLDC/MIDP.
    • Download the version for Windows Mobile 2003/5/6 or Windows CE platforms
    • Purchase a licensed copy of IBM WebSphere Everyplace Micro Environment for Windows Mobile, which comes with IBM's J9 VM for ARM-based devices
    * Connected Device Configuration/Foundation Profile ** Connected Limited Device Configuration/Mobile Information Device Profile
  • 30. eRCP – TaskOrganizer on PocketPC
  • 31.
    • Single Source; Three Runtimes
    • Thanks for attention !
    • Have Fun !
    • Suresh Krishna