This article describes the configuration of various JDBC-related features in
the BEA WebLogic 8.1 Server. Although we use Oracle 8.1.7 as our example
database management system (DBMS), the general concepts are easily
transferable to other relational databases as long as the databases in
question provide connectivity through JDBC.
JDBC is a standard Java API that is used directly or indirectly by almost all
J2EE applications that require database access. In BEA WebLogic 8.1,
configuring JDBC connectivity consists of creating and configuring two main
artifacts - JDBC connection pools and data sources. Related to these two
principal artifacts are other secondary configurable artifacts, such as a
Multi pool or a data source factory.
Connection Pool or Multi Pool?
Before we dive into how to create and configure a connection pool, we need to
take a brief look... (more)
This article compares Document Type Definition (DTD) and XML Schema elements.
Java 2 Enterprise Edition (J2EE) developers use DTDs and schemas in J2EE/XML
applications. When a DTD for an XML document is provided and validation with
an XML Schema is required, the DTD-to-XML Schema conversion creates an XML
Schema document corresponding to the DTD document.
A DTD defines the structure of an XML document and defines a document's
element types, subelement types, and the order and number of each element
type. It also declares the attributes, entities, notations, processing
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)
The WebLogic-Eclipse plug-in is designed to run the WebLogic Server from the
Eclipse IDE. With the WebLogic-Eclipse plug-in, the WebLogic Server gets
started and stopped from Eclipse. An application deployed in the WebLogic
Server can be debugged from Eclipse with the plug-in. By installing the
WebLogic plug-in in Eclipse the WebLogic Server can be configured and
administered from the Eclipse IDE by setting the server classpath and JVM
options in Eclipse.
A J2EE developer is commonly required to administer the WebLogic Server and
debug applications deployed in the WebLo... (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)