Download Enterprise J2ME: Developing Mobile Java Applications by Michael Yuan PDF

By Michael Yuan

J2ME bargains a very versatile and strong platform for constructing cellular purposes with enterprise-class functionality, reliability, and cost. Now, prime cellular developer Michael Yuan covers each point of creating industrial-strength purposes with J2ME: layout, structure, instruments, strategies, enterprise concerns, and more.Yuan introduces ideas that make the platform much more robust, starting from new J2ME profiles and instant messaging APIs to cellular databases and internet providers instruments. those suggestions permit current Java(TM) builders (especially J2EE(TM) builders) to leverage their abilities and upload mobility to company functions. Yuan additionally provides greater than a dozen whole pattern applications-including the appliance that earned him the grand prize in Nextel, solar, and Motorola's national instant developer contest. assurance includes:Patterns and top practices for development end-to-end cellular applicationsEmerging cellular "killer applications": riding productiveness and price reduction"Smart patron" purposes: structure and constructionAdvanced HTTP concepts for authentication and consultation trackingOvercoming and community limitationsLeading-edge cellular company messaging techniquesMobile databases and synchronization enginesXML and cellular internet providers, together with the J2ME internet prone non-compulsory PackageNew ideas for cellular defense within the firm"

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1 The IBM Service Management Framework The IBM SMF is a readily available OSGi implementation. It has a memory footprint of 3 MB and runs on both execution environments defined in the OSGi Service Platform Release 3 specification. IBM supports the J2ME environments through WME (WebSphere Micro Environment JVM) and the minimum execution environment through WCE (WebSphere Custom Environment JVM) products. It can be tightly integrated into IBM's WebSphere Studio Device Developer IDE. 5 for OSGi R3.

4. prepareScreen(); } } // ... 2). The threading model presented here is rather simplistic. For more advanced threading control examples, please refer to the Smart Ticket example (Chapter 5). 3 Data Exchange The MIDP client communicates with the class survey server via a pre-agreed binary format over the HTTP. In the wired world, generic binary data are passed through TCP/IP sockets. , HTTP headers). However, in the J2ME world, access to raw TCP/IP sockets is not ubiquitous. 0 specification. Therefore, J2ME developers often use HTTP to transport generic binary data.

GetQueryString(); // any pizza order logic // ... 3 The Logging Service A container can have multiple logging services. For example, one service implementation could log messages to a disk file while another could send the critical message as Instant Message alerts to administrators. The OSGi framework provides a common LogService interface for all logging services. Implementations of the LogService interface are provided and shared by individual bundles. 10) object is a ServiceTracker object that tracks all available logging services from the container registry and makes sure each message is logged by all services.

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