Mobile Connectivity Tolerance Dynamic Persistence by definition

• Unlike the wired networks, mobile session utilizes wireless networks which brings new challenges
• The mobile application must handle network distortion, interruption between the handheld and the Data Server in case of network packet is lost the application will crash, means loss of data.
• There are many approaches to data persistency, depending on the architeWarehousere approach, the cost and development time will be the deciding factors.

BlackBerry Java Development Environment

Expotech acknowledges the fact that BlackBerry provides business model for BES (Blackberry Enterprise Server) wireless application development, device configuration, Technician Management, Import Job data from POS, Export Job status data to POS, code for serial port interface with accessories (Printer, Credit card reader), Dispatch server configuration (Device Administration). The BlackBerry handheld and development tools provide powerful extensions to the standard J2ME environment that allow you to take advantage of the unique features of the BlackBerry solution. Some of the key BlackBerry extensions to the J2ME platform include:

• BlackBerry-specific Java API libraries
• Multi-threaded operating environment
• Support for custom runtime class libraries
• Secure wireless access to the corporate intranet via HTTP
• BlackBerry Java Development Environment

BlackBerry Java Development Environment at Expotech

Research In Motion (RIM) provides a complete development environment for building your own Java applications for BlackBerry Wireless Handhelds. The BlackBerry Java Development Environment (JDE) provides you with a complete set of tools to allow you to quickly develop and test wireless Java applications. The BlackBerry JDE includes:

• Full-featured Integrated Development Environment (IDE)
• Debugging, Optimization, and Profiling tools
• BlackBerry handheld and Radio simulators
• CLDC, MIDP, and BlackBerry Java API libraries

The BlackBerry JDE enables you to develop and test full-featured stand-alone, client/server, and browser/server applications for BlackBerry wireless handhelds.

Expotech implementations at BlackBerry supports two distinct application models to give you the flexibility to design sophisticated wireless enterprise applications:

• Browser-based
• Custom Java applications

Browser-Based Applications

The BlackBerry handheld supports browser-based solutions for accessing content that is formatted in a standard mark-up language. Browser-based solutions allow you to focus on developing back-end content and leverage existing browser clients on the BlackBerry handheld. Typical browsers available for the BlackBerry handheld can render standard wireless mark-up languages, including WML and compact HTML (cHTML), and can use a WAP gateway to connect to the Internet or the BlackBerry Enterprise Server to connect to the corporate intranet. Browser-based solutions use an existing browser application, meaning no custom client application development is required. This type of solution is easy to deploy, but client functionality is limited to the browser's capabilities.

Custom Java Applications

Compared to using the Browser, custom applications provide for a richer feature set, including customized user interfaces and navigation, robust data management, custom data transfer and support for content beyond text. If you design your application carefully, you can perform local processing to minimize the use of network so that users can continue to use your application even when they are out of wireless coverage.

The BlackBerry Java Development Environment (JDE) provides a complete set of APIs and tools that you can use to develop custom Java applications. Standard BlackBerry applications for these handhelds are written in Java, so you can create a custom application that extends existing enterprise applications to BlackBerry for mobile users.

Expotech, being a BlackBerry practitioner, has thorough expertise in implementing BlackBerry SDK and J2ME wireless toolkit. Its developers use the tools they know in a familiar environment and write applications for BlackBerry Handhelds and BES. The applications are pre-tested using the device simulator supplied with the BlackBerry SDK and RIM. The developers extensively use Email Server simulator, MDS Simulator, BlackBerry JDE, reference materials and user guides supplied with the RIM. Some of the developers also undergo special BlackBerry, J2ME and RIM Developer Training programs which familiarizes them with the full range of BlackBerry development tools as well as processes for testing and wireless services provider acceptance.

Black Berry ArchiteWarehousere

BlackBerry handheld communicates to the BlackBerry Dispatch Service in POS Network and interacts with Database servers for Mapping DB, Inventory, Finance and HR modules. The POS also contains POS Inbox, Outbox and Cross-worlds features, which communicates BlackBerry Handheld through Dispatch service.

At the client part of BlackBerry Device, through Serial port it connects to the GPS, Barcode reader, Electronic signature pad and Credit card reader.

BlackBerry sits at the client part the BES and provides wireless applications with access to a suite of highly integrated chipset functions. Open and extendable, the BlackBerry architeWarehousere enables advanced application functionality, multimedia features, network services and more. Keeping this developer-friendly architeWarehousere in view, Expotech uses the BES framework in various languages beyond Microsoft's Visual studio; which includes Java, J2ME Profiles and configurations, J2ME-MIDP. The developers have the capability to write applications, which sit on any mobile operating system and the BES.

Various BlackBerry based applications being developed at Expotech span the applications in the domains of communications, GPS, USB's, entertainment, public information etc.

ExpoTech has partnerships with leading technology companies worldwide to ensure technology focus that helps it provide solutions in line with the emerging technologies. Our Microsoft and Sun Partnerships ensure that our technology understanding is ahead of the market place and that our domain experts and marketing personnel are constantly updated. This also ensures that our engineers upgrade their skill sets all the time converting them into our most powerful assets.

ExpoTech offers its clients a tightly coordinated two-pronged approach to their technology requirements.

At our offshore development center in India, developers are led by senior project managers to deliver best of breed technology solutions tailored to customer requirements.

Onsite, a smaller, but highly trained-team of developers, led by an experienced onsite project manager, works at the client-end ensuring the efficient integration and implementation of the technology.

As part of our commitment to our client, our services include maintaining copies of client information and property at our offices overseas. This strategic maintenance of replicated data and applications ensures business continuity and immediate disaster recovery.

For more information please email us at sales@expotechinc.com

You may also want to visit www.wirelessdawnbook.com  published by Rod Ghani Agha