Showing posts from tagged with: web application development company

Servlet and its Importance

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The Servlet Architecture When a Web server receives a client request for static web pages (usually files with an extension .htm or .html), it looks for the requested page, and simply responds to the client with the contents. However, when dynamic content is requested, the behavior of the server needs to be different.

In this case, a program has to be run on the server machine that interprets the parameters of the request and generates the content accordingly. To enable the server to distinguish between regular requests for static pages and requests for dynamic content, the server needs to be made aware of which requests should map to a program.

This is usually done through a server plug-in. This plug-in is a small interface that tells the server which requests are dynamic (e.g. all pages that end with .cgi or .jsp), and what program to forward these requests to. A popular way of generating dynamic content in the past was the Common Gateway Interface (CGI). The CGI environment instantiates a new child process on the server to handle each request, i.e. runs a program that generates the output dynamically.

This method, however, is very resource intensive. Creating a the new runtime environment, initializing it and destroying it after use are overhead tasks that can weigh heavily when a Web server receives thousands of requests per day. A large number of simultaneous requests could even cause the server to crash due to memory restrictions. Servlets offer a much lighter weight approach to handling many client requests.

Although the servlet interface definition is based on CGI, it processes requests differently. A single program running on the server, a so-called Servlet Engine or Servlet Container, handles all requests. Instead of creating a new process for each request, the Servlet Engine uses Java’s multithreading capabilities to generate the dynamic page within the Servlet Engine’s main process.

]Kepran is an web application development company providing web application development services ,expertise in web application development in web application development Bangalore with professional web app developers in web application development India.

The Use of Linus in web application

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The Use of Linus in web application Linus Torvalds created the Linux operating system as a personal project in 1991 (in Finland), out of the desire to learn and understand the 386 processor and Unix-based operating systems. It was released free-of-charge to the public for everyone to make improvements under the terms of the GNU General Public License. Since then, Linux has grown into a major player in the operating system market, thanks to the contribution of hundreds of developers all over the world and the coordinating efforts of Linus Torvalds. It has been ported to run on a variety of architectures including Compaq's Alpha, Sun's SPARC, and Motorola's PowerPC chips.

The term “Linux” technically only refers to the kernel (the core of the operating system). 12 An important reason why Linux has become so popular today is the ease of availability through the so-called “distributions”. Distributions bundle the Linux operating system together with useful applications developed by independent groups, and usually have an installation program. Many companies offer Linux distributions today; a list of major distributions is given in the next section. With the combined efforts of companies as well as individuals, Linux has evolved into a modern operating system that incorporates protected memory, multitasking, fast TCP/IP networking, shared libraries and multi-user capabilities in web application development. Kepran is a web application development company providing web application development solutions expertise in web application development with professionals web app developers in web application development Bangalore located in web application development India

Need of Open Source

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Before diving into the different Open Source technologies, it is helpful to look at where Open Source came from, and the motivation behind it. When developing applications, it is important to understand both the rights and obligations that come with using Open Source software, since this can affect the newly developed product itself. While Open Source implies that the source code is available and modifiable, the use of the program is free, and copies may be made, it often also means that the same rules have to apply to the program that utilizes Open Source, depending on the type of license that the Open Source software is provided under web development company

It is also worth mentioning that free software, freeware, public domain, and Open Source don’t mean the same thing, although all of these products can be obtained free of charge. Recommend references are given below for readers interested in a more detailed discussion of these topics. The term “Free Software” is based on the idea of making software accessible to anyone for free, including the right for everyone to make improvements to it.

This implies that the source code is provided with the software product. To protect the rights of the authors, a formal approach through licenses has been introduced through Richard Stallman, a former member of the MIT Artificial Intelligence Lab, with the founding of the Free Software Foundation (FSF) in 1984. Stallman’s goal was to develop a UNIX-compatible operating system called GNU (= GNU’s not UNIX) which should give users a portable, no-cost alternative to the various UNIX systems that were specific to each hardware vendor. He planned to achieve this by gradually replacing the proprietary versions of the UNIX system software components with his and other voluntary 11 contributor’s developments. To protect the author’s copyright, as well as to guarantee the free use of derivatives of the GNU work, the FSF developed the GNU General Public License (GPL).Kepran is an web application development company providing  web application development Services in  web application development company India expertise in  web application development with professional  web application developers in  web application development Bangalore

Importance of Frame Works

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A controversial element in the HTML arsenal is a frameset. A frameset divides up the browser’s display area into rectangular regions, each rendering its own HTML document. The tag defines the number of frames the display should be broken up into and their sizes or proportions. Separate tags identify each of the frames with a target name. The tags also tell the browser which Web pages to request for each frame when initializing the page. Once a frameset page is loaded, with all its individual frames loaded as well, the user can work with the page. The user can select a hyperlink in any of the displayed pages in web application development 

  The link might specify a new document for the frame that it is in or a page to be loaded in another named frame. The most common use of frames is to define a table of contents and main document frame. The Web page in the table of contents frame is typically a long list of table of content entries, each a hyperlink to an area of the Web site. Each of the links specifies that the “main document” frame, or target, is where the linked Web page should be rendered. The output produced from the JavaDoc application is another excellent example of the use of frames. The parameters cols and rows of the tag define the initial size and the number of frames in the set. For example, the value "20%,50%,*" specifies three frames to be defined. The first occupies 20 percent of the screen; the second, 50 percent; the third, the remaining space, 30 percent. Instead of percentages, explicit widths can also be defined, and that’s where the * value becomes useful. Of course, it is entirely possible for a frame to contain another frameset. This allows designers a little more freedom from a simple matrix frame design and can be used to produce any combination of rectangular regions in the browser’s display. The following HTML fragment defines a simple table of contents–like page. Kepran is an web application development company providing web application development services in web application development Bangalore expertise in web application development in web application development India.

Importance of Enhydra

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Importance of Enhydra Enhydra provides a development environment for creating Web applications, being the Open Source alternative to commercial software products that typically cost several thousand or up to tens of thousands of dollars per CPU (e.g. WebSphere by IBM, iPlanet web Application Server by Sun. A major downside of Enhydra has been its lack of support for the Java 2 Enterprise Edition. The Enhydra Architecture Web Server Application Frame work tools Application W izard XM LC Kelp Tools DODS Database Server Database Manager Data Layer D O D O Session Manager Business Layer B O BO Web Browser Enhydra Multiserver Presentation Manager Presentation Layer POPO Web Server with Enhydra Director Multiserver Admin JDBC JD BC • A Web server. The Web server can either be the Enhydra Multiserver, which is an HTTP 1.1 Web server with servlet engine supporting the servlet API version 2.2, or any other Web server with servlet engine. Enhydra applications work with any standards-compliant servlet runner. • The Application Framework. Currently, Enhydra offers two distinct application models. The developer may either choose the Enhydra-specific “Enhydra super-servlet application framework”, or the “servlet application framework” that follows J2EE standards. The differences are described in further detail below. 19 • Tools. Enhydra offers a set of tools that help build a Web application. Enhydra separates the application logic into three layers: The presentation layer, the business layer, and the data layer. Following this concept ensures that the designers can independently work on the presentation while software engineers work on the application logic. Providing three distinct layers also increases the maintainability of the code. Kepran is an web application development company providing web application development services in web application development Bangalore expertise in web application development at web application develpp[ment India

 

Web Application Development Introduction

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Web Application Development Introduction Initially, what people shared over the Internet consisted mostly of static information found in files. They might edit these files and update their content, but there were few truly dynamic information services on the Internet. Granted, there were a few exceptions: search applications for finding files found on FTP archives and Gopher How to Build Web Applications in One Easy Lesson 5 servers; and services that provided dynamic information directly, like the weather, or the availability of cans from a soda dispensing machine. (One of the first Web applications that Tim Berners-Lee demonstrated at CERN was a gateway for looking up numbers from a phone book database using a Web browser.)

However, for the most part the information resources shared on the Web were static documents. Dynamic information services— from search engines to CGI scripts to packages that connected the Web to relational databases—changed all that. With the advent of the dynamic web, the bar was raised even higher. No longer was it sufficient to say that you were designing a ‘Web site’ (as opposed to a motley collection of ‘Web pages’). It became necessary to design a Web application. Definition of a Web Application What is a ‘Web application?’ By definition, it is something more than just a ‘Web site.’ It is a client/server application that uses a Web browser as its client program, and performs an interactive service by connecting with servers over the Internet (or Intranet). A Web site simply delivers content from static files. A Web application presents dynamically tailored content based on request parameters, tracked user behaviors, and security considerations. Kepran is an web application development companyexpertise in web application development providing web application development services located in web application development Bangalore in web application development India in web app development

Servlet Introduction

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When a Web server receives a client request for static web pages (usually files with an extension .htm or .html), it looks for the requested page, and simply responds to the client with the contents in web app developemnt. However, when dynamic content is requested, the behavior of the server needs to be different: In this case, a program has to be run on the server machine that interprets the parameters of the request and generates the content accordingly in

To enable the server to distinguish between regular requests for static pages and requests for dynamic content, the server needs to be made aware of which requests should map to a program. This is usually done through a server plug-in. This plug-in is a small interface that tells the server which requests are dynamic (e.g. all pages that end with .cgi or .jsp), and what program to forward these requests to. A popular way of generating dynamic content in the past was the Common Gateway Interface (CGI). The CGI environment instantiates a new child process on the server to handle each request i.e. runs a program that generates the output dynamically.

This method, however, is very resource intensive. Creating a the new runtime environment, initializing it and destroying it after use are overhead tasks that can weigh heavily when a Web server receives thousands of requests per day. A large number of simultaneous requests could even cause the server to crash due to memory restrictions. Servlets offer a much lighter weight approach to handling many client requests. Although the servlet interface definition is based on CGI, it processes requests differently. A single program running on the server, a so-called Servlet Engine or Servlet Container handles all requests. Instead of creating a new process for each request, the Servlet Engine uses Java’s multithreading capabilities to generate the dynamic page within the Servlet Engine’s main process. Kepran is an web application development company providing web application services ,expertise in web application development located in web applicaton development compa y Bangalore in web application development India

Overview of Linux

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Overview of Linux Linus Torvalds created the Linux operating system as a personal project in 1991 (in Finland), out of the desire to learn and understand the 386 processor and Unix-based operating systems. It was released free-of-charge to the public for everyone to make improvements under the terms of the GNU General Public License. Since then, Linux has grown into a major player in the operating system market, thanks to the contribution of hundreds of web  developers all over the world and the coordinating efforts of Linus Torvalds. It has been ported to run on a variety of architectures including Compaq's Alpha, Sun's SPARC, and Motorola's PowerPC chips in web application development

The term “Linux” technically only refers to the kernel (the core of the operating system). 12 An important reason why Linux has become so popular today is the ease of availability through the so-called “distributions”. Distributions bundle the Linux operating system together with useful applications developed by independent groups, and usually have an installation program. Many companies offer Linux distributions today; a list of major distributions is given in the next section. With the combined efforts of companies as well as individuals, Linux has evolved into a modern operating system that incorporates protected memory, multitasking, fast TCP/IP networking, shared libraries and multi-user capabilities Kepran infosoft is a web application development company providing web application development service located in web application development India in web application development expertise in web app development

Introduction To The Idea Of Open Source

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Introduction To The Idea Of Open Source With the introduction to the idea of Open Source and the overview of available products, Developers can chose from a growing variety of Open Source products to assemble a web  development environment that fits their needs. The utilization of Java as the primary development language for Open Source Web technologies results in platform-independence and high reusability of the web developed components. Furthermore, Open Source products interoperate well (e.g. Apache and Tomcat) and they are often more configurable than their commercial counterparts. This thesis has demonstrated that Open Source Web application development can hold up to the high expectations. The case study presented has confirmed that Linux, CVS, and Tomcat, and MySQL can provide the means to develop and deploy a Web application in a free-of-charge environment while providing high reliability, usability, and security. Development using Open Source products is without a doubt more difficult than with its commercial counterparts. This is mainly because documentation is not as readily available. This may change in the future, though, due to the growing popularity of Open Source. A comparison of the Web enabling Java technologies by Sun Microsystems and their most important current and prospective competitor, Microsoft’s ASP and .NET, has been presented. Both approaches have many similarities, even more so with the introduction of the .NET platform. However, since ASP and C# cannot offer significant advantages at this point in time and lack platform independence, it seems likely that Java will continue to be the dominating programming language for Web applications in the near future. Kepran infosoft is a web application development company providing web application development service

located in web application development India in web application development expertise in web app development

Document Delivery in Web Application Development

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Document Delivery in Web Application Development The World Wide Web was initially designed as an material medium for distributed research teams.4 A key objective was to make it as easy as possible for authors to deliver documents, and the notion of Web application development essentially boiled down to document development by an author or small group of authors.

For this kind of development, the life cycle comprises informal analysis of what is to be presented, informal design of how to construction it into hyperlinked chunks of info, and implementation through markup. Following implementation, the documents are maintained by the authors themselves. The Web implementation model was designed to meet these life-cycle requirements. It is purposely simple, based on the notion of resources that model mostly self-contained masses of information. Resources are authored and maintained rather independently of other resources, and links are the means by which resources can be combined into coherent sets of documents—for example, a Web site. The resource concept fits the document-development life cycle very well, and resources support the principles of modularity in this context. However, the use of the Web has moved far beyond its original scope, even in document delivery. It has become a tool for high-end publishing with complex requirements related to layout, corporate identity, and the integrity of large webs of information. The life cycle of a company Web site is now typically based on intensive requirements analysis in terms of content, structure, access, and corporate identity. Kepran infosoft is a web application development company providing web application development service located in web application development India in web application development expertise in web app development