Page 220 - DCAP312_WEB_TECHNOLOGIES_II

Web Technologies-II

Notes The following are alternative names used for XML Appliances:
XML accelerators: Are devices that typically use custom hardware or software built on standards-
based hardware to accelerate XPath processing. This hardware typically provides a performance
boost between 10 and 100 times in the number of messages per second that can be processed.

Integration appliance: (also known as application routers) are devices that are designed to make
the integration of computer systems easier.

XML firewalls are classes of XML appliances focused on identity and message security. They
typically implement WS-Security message standards along with standards like SAML, WS-I
BSP, WS-Policy and so forth.
Message: Oriented middleware appliances - are hardware devices supporting the sending and
receiving of messages between distributed systems.
• SOA Gateways are commonly used to govern SOA traffic.
• API proxy are commonly used to manage Web API's.

Self Assessment Questions
1. ………………… are distributed application components that are externally available.
( a) NET provides (b) Integration

( c) Pointers (d) Web services
2. A significant advantage of web services, relative to other ………………, is the support of
firewalls.
( a) WSDL (b) Access Protocol
( c) distributed architectures (d) SOAP

3. Elements are the extensible engine for expressing structure in ……………….
( a) Java (b) PHP
( c) UDDI (d) XML

4. Oracle is developing a java.net project called Metro.
( a) True (b) False
True or False

5. Integration appliance is devices that are not designed to make the integration of computer
systems easier.

( a) True (b) False
10.3 Using for Web Services

A Web service is a system of communiqué between two electronic devices over the Web (Internet).
The W3C defines a "Web service" as "a software system intended to support interoperable
machine-to-machine interaction over a network". It has an interface described in a machine-
processable format (specifically Web armed forces Description words, known by the acronym
WSDL). Other systems interact with the Web service in a manner prescribed by its description
using SOAP messages, typically conveyed using HTTP with an XML serialization in conjunction
with other Web-related standards."

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