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JDBC Definitions
Isolation Level
An isolation level represents a particular locking strategy employed in the database system to improve data consistency.
The higher the isolation level number, the more complex the locking strategy behind it. The isolation level provided by the database determines how a transaction handles data consistency.
The American National Standards Institute (ANSI) defines four isolation levels:
- Read uncommitted (0)
- Read committed (1)
- Repeatable read (2)
- Serializable (3)
J2EE
J2EE (Java 2 Platform,
Enterprise Edition) technology and its component-based
model simplify enterprise development and deployment. The
J2EE platform manages the infrastructure and supports the
Web services to enable development of secure, robust and
interoperable business applications.
JAXP
The Java API for XML-based
RPC (JAX-RPC) enables Java technology developers to develop
SOAP-based interoperable and portable web services. JAX-RPC
provides the core API for developing and deploying web
services on the Java platform. JAX-RPC is a required part of
the J2EE 1.4 platform. JAX-RPC web services can also be
developed and deployed on J2EE 1.3 containers and Servlet
container.
JDOM (JSR-102)
JDOM (Java
Document Object Model) is a Java API for processing XML
documents. JDOM provides a way to represent XML documents for easy and efficient reading, manipulation, and writing. It has a straightforward API, is lightweight and fast, and is optimized for the Java programmer. It's an
alternative to DOM and SAX, although it integrates well
with both DOM and SAX.
JNDI
The Java Naming and
Directory Interface (JNDI) is a standard extension to the
Java platform, providing Java technology-enabled
applications with a unified interface to multiple naming
and directory services in the enterprise. As part of the
Java Enterprise API set, JNDI enables seamless connectivity
to heterogeneous enterprise naming and directory services.
Developers can now build powerful and portable
directory-enabled applications using this industry
standard.
JTA
JTA (Java Transaction API)
specifies standard Java interfaces between a transaction
manager and the parties involved in a distributed
transaction system: the resource manager, the application
server, and the transactional applications.
Locking Level
Locking is a database operation that restricts a user from accessing a table or record. Locking is used in situations where more than one user might try to use the same table at the same time. By locking the table or record, the system ensures that only one user at a time can affect the data.
SOAP
SOAP is a lightweight
protocol for exchange of information in a decentralized,
distributed environment. It is an XML based protocol that
consists of three parts: an envelope that defines a
framework for describing what is in a message and how to
process it, a set of encoding rules for expressing
instances of application-defined datatypes, and a
convention for representing remote procedure calls and
responses.
UDDI
The Universal Description,
Discovery and Integration (UDDI) project is a sweeping
industry initiative. The project creates a
platform-independent, open framework for describing
services, discovering businesses, and integrating business
services using the Internet, as well as an operational
registry that is available today.
UDDI is the first truly cross-industry effort driven by all major platform and software providers, as well as marketplace operators and e-business leaders. These technology and business pioneers are acting as the initial catalysts to quickly develop UDDI and related technologies.
The UDDI project takes advantage of
WorldWide Web Consortium (W3C) and Internet Engineering
Task Force (IETF) standards such as Extensible Markup
Language (XML), and HTTP and Domain Name System (DNS)
protocols. Additionally, cross platform programming
features are addressed by adopting early versions of the
proposed Simple Object Access Protocol (SOAP) known as XML
Protocol messaging specifications found at the W3C Web
site. The UDDI protocol is the building block that will
enable businesses to quickly, easily and dynamically find
and transact with one another using their preferred
applications.
Web Services
A Web Service
offers a specific business function to applications
provided by another application via standard Internet
protocols (XML, SOAP, WSDL, UDDI). The existence and
location can be dynamically discovered by consuming
applications and can usually be dynamically requested
without prearranged binding. Web services represent an
environment in which developers use components with well
defined units of business logic and data access that can be
assembled, at run time, to enable a business process.
Web Service Definition Language (WSDL)
WSDL is an XML format for describing network services as a
set of endpoints operating on messages containing either
document-oriented or procedure-oriented information. The
operations and messages are described abstractly, and then
bound to a concrete network protocol and message format to
define an endpoint. Related concrete endpoints are combined
into abstract endpoints (services).
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