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XFRAMES

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XFrames






XFrames is a comprehensive productivity layer that simplifies building of complex IT Client /Server application n-tier.

It simplifies building applications as a set of business services with Web, Scripting (7Script,VBscript,JScript), and Rich Client interfaces.

XFrames accelerates development with free modules, already implemented and ready to use that you'd otherwise have to code, test, and debug by hand. Since its implementation is based on standards and its features embody years of experience from FLK's own business application developers.

Your XFrame-powered applications are high-performance, well-architected, and portable.

XFrame provides a flexible, end-to-end application infrastructure, with an integrated RAD visual design tools, that accommodates your technology choices in each architectural layer, and help you throughout the complete application lifecycle management.



XFRAMES Environment



The XFrames environment is a client/server system based on Microsoft’s DNA standard,which is a multi-tier architecture.

Client/Server

Client/server describes the relationship between two computer programs. A client is the requesting program, or user, which requests data from another program, the server. The server receives a request for data, processes the request, and returns the data to the client. A server program provides data to client programs in the same computer or in other computers. The computer that the server program runs on is also referred to as a server (though it may contain a number of server and client programs). For example, the user of a Web browser is effectively making client requests for pages from servers all over the Web. The browser itself is a client in its relationship with the computer that is receiving and returning the requested files. The computer handling the request and sending the Web pages back to the user is the server.

Multi-Tier

Multi-tier is a term that applies to a computer system where the software is layered, by function, among multiple computers. Generally, each of these layers resides on its own computer. The most common multi-tier architecture is the client/server system, which is a two-tier system; the user interface is on one tier (the client) and the business process and data storage are on the other tier (the server). Windows DNA architecture supports three tiers, or layers:

• User interface

• Business process

• Data storage

Architecture

XFrames conforms to the Windows DNA three-tier standard:

  • User interface: XFrames Client
  • Business process (the application): XFrames Server
  • Data storage: Database Server, PLCs, Embedded Device

    The following diagram illustrates a XFrames environment:



Benefits


XFrame’s multi-tier architecture offers major benefits:

  • Each server can have one or more application.
  • The applications can be developed and maintained from any of the clients.
  • Modifications made to any application are “pushed” to any clients looking at that application.
  • A XFrames system can be scaled or expanded, based on the needs of the business.

A small application can exist with all tiers on a single computer. A large application may require multiple servers. For example, the middle tier for the servers can have alarming on one server, trending on another, and so forth. And, because the application database is separate, the data-storage tier can be scaled to grow with the business.



XFRAMES n-Tier






Client Tier - User Interface- Client Builder


The XFrame Client Builder module aids the development of sophisticated operator interfaces with a concept of object-oriented control. MMI can be used as a basis for developing a standard application for an end user. In an application implemented with an object-oriented control philosophy, the user can only have one object selected at a time and it is clear which object it is.

Of course, there are some general functions and components that are always available, such as log in, log out, go to alarm screen, and screen navigation to name a few. The general functions that are available may vary depending upon the privileges of the person viewing the screen. So, if someone doesn’t have access to a particular screen, he or she doesn’t have access to a button to go to that screen.

The client builder use a robust and mature Sevenview Technology.






Application Tier - Business ring process- Tasks


XFrames is a set of programs that perform a specific activity in the automation process, such as:

  • Reading and writing of data to external devices (PLCs, RTUs, Embedded Device)
  • Collection and storage of data
  • Alarming
  • Generating reports
  • Geo Code Plant
These programs are referred to as modules or tasks because they are independent programs that do only one specific job or task alone, but together make an application fully functional. You access the tasks through the Configuration Explorer, one of the XFrames application-development tools.




Data Tier - Data Store


Since this has been deemed the Age of Information, and since all information needs to be stored, the Data Tier described above is usually an essential part.

Basically, Data Tier is your Database Management System (DBMS) -- SQL Server, Access, Oracle, MySql, plain text (or binary) files.

This tier can be as complex and comprehensive as high-end products such as SQL Server and Oracle, which do include the things like query optimization, indexing, etc., all the way down to the simplistic plain text files (and the engine to read and search these files).

This layer is only intended to deal with the storage and retrieval of information. No business logic in here, no matter how tempting.

XFrames can use 3 different DBMS :
  • ORACLE
  • SQL Server
  • xSQL

Note that some vertical distribution of XFrames default install an ORACLE XE datastore.



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