OSGi World Congress 2004

1. © copyright 2004 by OSGi Alliance All rights reserved.
Enabling the Enterprise with Next-
Generation Mobile Architectures

2. © copyright 2004 by OSGi Alliance. All rights reserved.
Speaker and Agenda
• Speaker:
– Mark VandenBrink (vmark@us.ibm.com)
– IBM; Mobile device client architecture,
Linux/Java
– In a previous life, MIDP 1.0 EG lead (and well
on my way to a complete recovery ☺)
• Agenda:
– Enterprise applications mini-primer and use
cases
– Current mobile device clients (MIDP)
– MEG: the future of mobile device clients

3. © copyright 2004 by OSGi Alliance. All rights reserved.
Enterprise Applications
• What is an “enterprise application”?
– Canonical example is PIM access (email, calendar,
etc.)
– “Project existing enterprise services into various client
channels”
• Client-side Requirements:
– Have low TCO
– Little-to-no deployment costs
– Be predictable, yet flexible
– Available and scalable
– Secure
– Capable of “off-line” processing

4. © copyright 2004 by OSGi Alliance. All rights reserved.
Enterprise Conceptual Model
Client TierClient Tier
Client 1
(browser/applet)
Client 2
MIDlet
. . .
Backend TierBackend Tier
Database
ERP
Other
Legacy Apps
Middle TierMiddle Tier
Web Container
EJB Container
. . .
. . .

5. © copyright 2004 by OSGi Alliance. All rights reserved.
Enterprise Programming Model
•Dynamically managed
•Platform
•Applications
•Richer experience
•Alternate View/Control choices
•Disconnected operation
•Dynamically managed
•Platform
•Applications
•Richer experience
•Alternate View/Control choices
•Disconnected operation
Client-tierClient-tier
Controller Store
ModelView
Middle-tierMiddle-tier
Controller Store
ModelView
Backend-tierBackend-tier
Controller Store
ModelView

6. © copyright 2004 by OSGi Alliance. All rights reserved.
Use Case/Scenario
•• Spacely SprocketsSpacely Sprockets
– Provides a suite of ee--Commerce web applicationsCommerce web applications for
business partners to create and submit orders for
sprockets online
– Catalog of available sprockets, current inventory, and
prices change frequently
•• Spacely Sprockets Business PartnersSpacely Sprockets Business Partners
–– WWould like to run the erun the e--Commerce web applicationCommerce web application
suite while at customer sitessuite while at customer sites
– Would like to use mobile phonesmobile phones as client tier

7. © copyright 2004 by OSGi Alliance. All rights reserved.
Scenario Requirements
•• Spacely SprocketsSpacely Sprockets
– Leverage existing J2EE/portal-based
application
– Extend the application to support
• Richer interaction on client tier
• Alternative client devices
• Disconnected use
•• Business PartnersBusiness Partners
– Use COTS equipment for client tier

8. © copyright 2004 by OSGi Alliance. All rights reserved.
Scenario: Browsing
ModelView
Mediator
View Logic
View Data
Business Logic
Business Data
Controller
User Agent
Scripts
*ML
Model
Business Logic
Business Data
Markup
OR
URL rewrite
caching
Mediator
Client-tier Middle-tier
Transactional
Messaging
Backend-tier

9. © copyright 2004 by OSGi Alliance. All rights reserved.
Browsing
Attributes
• Capability
– Connected: render dynamic, network content
– Disconnected: render (limited) cached content
• When to apply
– Connected: When connected, subject to latency,
bandwidth, and coverage concerns. R/W access
– Disconnected: When not connected, R/O access
• Implications on Scenario
– Connected: review pricing, place orders, etc.
– Disconnected: review pricing only

10. © copyright 2004 by OSGi Alliance. All rights reserved.
Scenario: Offline Apps
ModelView
Mediator
View Logic
View Data
Business Logic
Business Data
Controller
User Agent
Scripts
*ML
Model
Business Logic
Business Data
Markup
Mediator
Client-tier
Transactional
Messaging
Backend-tier

11. © copyright 2004 by OSGi Alliance. All rights reserved.
Offline Apps
Attributes
• Capability
– Provides local application programming model that
interacts with external applications and services
• When to apply
– When there is need for disconnected operation
– When richer, alternate user interaction is needed(i.e.
non-browser based)
• Implications on scenario
– Spacely Sprockets business partners with little or no
network connectivity can be fully serviced

12. © copyright 2004 by OSGi Alliance. All rights reserved.
Mobile Clients Today: MIDP
• Mobile Information Device Profile
• Most recent: Version 2.0
• Widespread adoption in mobile world
• Unit of deployment/packaging: MIDlet
Suite
• Unit of execution: MIDlet
• Can act as client-tier via web services

13. © copyright 2004 by OSGi Alliance. All rights reserved.
MIDP for Enterprise Apps?
• Limited end-to-end model
– Security, identity management, etc
– Client/server tools
– Weak (platform-level) support for disconnected
operation (e.g. messaging, synchronization, etc.)
– Unmanaged
• Relatively high cost of deployment for MIDlets
• No “shared component” support (by design)
• Limited interaction support (MIDlet only)
• Limitations can be overcome, but results in
MOAM (Mother Of All MIDlets)

14. © copyright 2004 by OSGi Alliance. All rights reserved.
OSGi: Mobile Expert Group (MEG)
• Formed in Dec 2003
• Working on enabling a next-generation
mobile phone architecture
• Based on V4 OSGi Framework
• Linked to JCP via JSR-232

15. © copyright 2004 by OSGi Alliance. All rights reserved.
Service Interfaces
MEG Framework
Base Phone Hardware/SoftwareBase Phone Hardware/Software
Phone Hardware
Platform Abstraction LayerPlatform Abstraction Layer
Operating SystemOperating System Device DriversDevice DriversDevice DriversDevice Drivers
PresentationPresentation
AudioAudio
Window MgtWindow Mgt Input MgtInput Mgt
MultimediaMultimedia
Presentation Class LibrariesPresentation Class Libraries
DataData
File systemFile system
Structured StorageStructured Storage
Data Class LibrariesData Class Libraries
JVMJVM
Porting LayerPorting Layer
GCGCExecutionExecution LoaderLoaderSecuritySecurity IntrospectionIntrospection
Base Class LibrariesBase Class Libraries
ConnectivityConnectivity
Network MgtNetwork Mgt
TCP/IPTCP/IP UDPUDP USSDUSSD SMSSMS MMSMMS
Network Class LibrariesNetwork Class Libraries
HTTPHTTP
MEG: Conceptual Architecture
MIDP Application Container
MEG Application Container
OSGi Service FrameworkOSGi Service Framework
XML Parser Log Package Admin
Service Tracker Start Level Permission Admin
Event Manager Deployment Security
App Manager App Logger
Device
Management
Policy
APIs

16. © copyright 2004 by OSGi Alliance. All rights reserved.
MEG: Enterprise Attributes
• Allows for different user-interactions via
“container” notion
• Allows for shared components via services
• Enterprise features designed in from start:
– Security
– Policy
– Deployment

17. © copyright 2004 by OSGi Alliance All rights reserved.
The End