Information Technology Reference
In-Depth Information
Fig. 1.15
QFView web Interface
QFView supports the integrated use of visualization and animation tools which
are integrated with the database management system for data access and archiving.
For example, in a possible configuration of QFView components over the Internet,
the J2EE application servers [
47
], and the Database Management System servers
(DBMS) [
48
] are located in one site, while the GUI client applications run on a
server in another location (Fig.
1.17
a). The meta database is based on a J2EE
distributed architecture whose execution logic is stored and executed at the EJB
container level [
49
], and which is accessed from the Java-based graphical user
interface (GUI) via the http protocol. The main advantage of the Internet is the
possibility to store and access data (images, input files, documents, etc.) from any
URL in the world. Both EFD and CFD applications generate huge quantities of
data which can be used to populate the database. The user needs to access, extract,
visualize, and compare the required quantities; these functions as illustrated in
Fig.
1.16
. The QFView system is composed of three major elements:
1. An ''EJB container'' with all the metadata management rules to manipulate
metadata and the relational database used to store the metadata information.
The EJB container acts as security proxy for the data in the relational database.
2. A ''Thin GUI Java client'' is used for remote data entry, data organization, and
plug-in visualization. GUI clients must be installed at the end-user location,
either
at
application
installation
time
or
by
automatic
download
(Zero
Administration Client).
3. URL accessed data (images, video, data files, etc.) can be placed at any URL
site.
QFView organizes stores, retrieves, and classifies the data generated by
experiments and simulations with an easy-to-use GUI. The data management
component (Fig.
1.17
b), offers a user-friendly web-enabled front-end to populate
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