Latest News from P.G. Sarang

Mobile Agent-Based File Search Utility

Sun, 04 Feb 2007 17:00:00 EST

In today's world of network computers our important documents are usually widely dispersed on several computers in our networks. Over a period of time, we forget their location and searching for these files on a huge network turns out to be a frustrating experience. Such searches are typically not only time-consuming, but also consume valuable and scarce network resources. This article provides an elegant solution to this problem.

How To Build a Matrix Calculator for Java-Enabled Mobile Phones

Fri, 25 Mar 2005 00:00:00 EST

Because the RAM available for Java Midlets running on the J2ME mobile platform is typically of the order of only 500KB, developers need to take care selecting data structures allocating resources in order to optimize memory usage when building a Matrix Calculator application that allows users to perform operations such as Add, Subtract, Multiply and Transpose.

Corba Project Browser

Tue, 01 Jun 1999 00:00:00 EDT

With the rapid growth of the Internet, distributed Web-enabled applications are becoming popular. One of the most commonly used architectures for development of such applications is CORBA, which provides a platform, location and an implementation-language-neutral architecture for the development of distributed applications. In addition, the phenomenal interest in component technology has led to the development of CORBA Beans. Such CORBA components and objects will soon be available for use on the Web. When you encounter such a CORBA object, you may wish to use its services by dynamically discovering its properties (something similar to Introspect and Reflection in Java). CORBA supports this.

Callbacks In CORBA

Mon, 01 Mar 1999 00:00:00 EST

In recent days, CORBA has fast become a standard for the development of distributed applications. A CORBA application may consist of one or more CORBA server objects and many clients who connect to these servers. A CORBA server object makes itself available to the client by registering with the CORBA Naming Service or a CORBA Trader Service. A client locates the desired server object on the network by using this Naming or Trader service. Once the server object is located, the client receives a reference to it. Using this reference, the client can invoke methods on the server object and carry out its desired work. Thus it's the client that usually makes use of server facilities; the server simply returns the results of method invocations to the client. However, in some situations, it may be necessary for the server to invoke a method on the client object. For example, the server may like to notify the client of the occurrence of a certain event on the server or the completion of a processing job requested by the client. This method of invocation on the client is called Callback. CORBA specifications allow Callbacks on clients. This article discusses the implementation of CORBA callbacks using Java.