A J2EE application deployed in the WebLogic server may be debugged in the
Eclipse IDE with the remote debugger provided by Eclipse. Without a debugger
the error message has to be obtained from the application server error log to
debug the application.
With the remote debugger provided by Eclipse, exception breakpoints may be
added to the application file to debug. When an application is run in
WebLogic and the application generates an error, the application gets
suspended and the Eclipse IDE Debug perspective displays the error. In this
tutorial we will debug a WebLogic Application Server application in Eclipse.
To debug an application deployed in the WebLogic Server from Eclipse, start
the WebLogic Server in debug mode and configure a remote debugging
configuration in Eclipse. Next, connect the Eclipse remote debugger to the
WebLogic Server and debug applications r... (more)
The Apache Jakarta POI project provides components for the access and
generation of Excel documents. The POI HSSF API is used to generate Excel
Workbooks and to add Excel spreadsheets to a workbook. An Excel spreadsheet
consists of rows and cells. The layout and fonts of a spreadsheet are also
set with the POI HSSF API.
A database table is often required to be presented in an Excel spreadsheet.
Also, a developer's requirement could be to store an Excel spreadsheet in a
database table. The Apache POI HSSF project is an API to create an Excel
spreadsheet. The data in the Excel spr... (more)
A directory service is an application(s) that stores, retrieves, and modifies
information about network resources such as network users. The actual data is
stored in a database; a database service is an abstract layer on top of the
database. The Lightweight Directory Access Protocol (LDAP) is a lightweight
protocol for accessing directory services. LDAP is based on entries; an entry
is a set of attributes identified by a globally unique Distinguished Name
(DN). Each of a directory entry's attributes has a type and one or more
values. The attributes in a directory entry's distingu... (more)
JavaServer Faces (JSF) technology is used for developing server-side user
interfaces (UI) for Java EE applications. JSF 2.0 architecture has introduced
several new features, most of which we shall discuss in this article. The
salient new features in JSF 2.0 are State Saving, Facelets, Navigation,
Validations, Scopes, AJAX, Resource Handling, Composite Components, View
Params, Client Behaviors, Event Handling, and Exception Handling.
In JSF 1.2 the full component tree is saved/restored. Attributes are also
stored and restored. Saving and restoring the full state has pe... (more)
Virtualization is the process creating a virtual version of a resource such
as an operating system, network resource or storage device. Virtualization of
an OS involves hosting an OS on another OS using a virtualizer such as Oracle
VirtualBox. Various Linux distributions such as openSUSE, Ubuntu, and Fedora
are available. In this article we'll discuss hosting openSUSE, Ubuntu, and
Fedora on Oracle VirtualBox running on Windows OS.
Setting the Environment
Download the ISO images for the guest OS to be installed, openSUSE 12.1 Live
KDE ISO, Ubuntu ISO, Fedora ISO. Download the Oracl... (more)