Add MIDP 2.0's push registry feature to your device application
Tutorial Details:
Summary
Pushing messages to a mobile device from a server and automatically forcing a pre-installed application to wake up and do some processing is sometimes important for an enterprise mobile application. Java Micro Edition applications that use Mobile Information Device Profile 2.0 can have this feature using the push registry, with Short Message Service (SMS) used as the protocol for pushing messages.
Mobile technology continues to grow in popularity. And Java Micro Edition, or Java ME (Sun's new name for the J2ME platform), is one of the most prevalent technologies for developing mobile applications. Using Java ME, we can run many wireless applications in handheld devices that use either a JVM or KVM.
The application component, which runs in the mobile device, is a MIDlet, a MIDP application. A MIDlet is basically a set of classes designed to be run and controlled by the application management software (AMS) inside a mobile device.
The push registry's behavior can be described in the following three steps:-
The MIDlet registers a port along with the protocol name in the mobile device such that, if any message arrives in the specified port with the protocol mentioned, the AMS delivers it to the MIDlet. The registration is done statically using the Java ME application descriptor (JAD) file. The program can also perform dynamic registration using an API inside the application.
From the server, a message is sent to the specific mobile device using the particular protocol and port where the MIDlet application is registered to listen.
After the message is delivered to the mobile device, the AMS calls the MIDlet application, which has registered to listen to that particular port and particular protocol. Once the message is delivered to the MIDlet, it is the application's responsibility to process the message accordingly. Typically, an application may choose to open a screen, depending on the message, and allow the user to do some server transaction.
Let's now develop a sample application that will enable us, from a Java server-side application, to send an SMS message to a mobile phone's specific port and automatically launch a MIDlet in the mobile device.
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