On this page you find information and 3rd party links about mobile communication technology.
Cloud Computing is Internet based offering of service API:s (web service), composite services, applications (SaaS - software as as service), application platforms,
storage and processing capabilities on demand.
The challenge to evolve cloud computing will be to integrate and aggregate with security in mind.
Web applicaton example: www.mindmeister.com
is an asynchronous publish-and-subscribe
type pattern in contrast to the synchronous request/pattern.
Systems designed and implemented according to EDA, Event Driven Architecture,
transmit event notification messages among loosely coupled software
components and services.
These systems exist of Event Producer and Event Consumer
components and an Event Notification Service to which Event Publishers
advertise publication of future notifications and publish
event notifications, and to which Event Consumers subscribe/unsubscribe
for event notifications. The Event Producers and Event Consumers are
not aware of each other.
The Event Notification Service notifies the Event Consumer/Event Producer
respectively, i.e. an Event Consumer may be notified about a published
event notification or an Event Producer may be notified about a notification
subscription or unsubsription.
Components > advertise, subscribe, unsubscribe, publish > (input
interfaces) Event Notification Service > (output interface) notify
An Event Notification Service is implemented as a Broker or
set of of brokers, which in reality probably consist of ESB's (Enterprise
Service Bus) with Message Broker and Event Broker functionality.
An ESB is acting as a mediator between Event Producers and Event Consumers
and between services. While the ESB generally does message routing,
transport protocol conversion, message format transformation and business
event handling, the Event Broker functionality executes the topic/content-based
routing of the event notification messages. Read
Beth Gold-Bernstein' article about ESB and read
about the SEMEASY project, which among others has the objective "...to
make event-driven development easier by adding event-broker software
in the Enterprise Services Bus.". See
Jack van Hoof's article were he describes an 'Exchange Area' which is
realized by an ESB. An example of a commercial broker is IBM:s WebSphere
Read more about EDA:
International Conference on Distributed Event-Based Systems (DEBS) conference
has been held from June 20th-22nd, 2007, in Toronte Canada.
See the article
"Peter Pietzuch, Gero Muhl, and Ludger Fiege, "Distributed
Event-Based Systems: An Emerging Community," IEEE Distributed Systems
Online, vol. 8, no. 2, 2007, art. no. 0702-o2002."
Peter R. Pietzuch, Gero Mühl and Ludger Fiege are also the authors
of the book:
Read about Complex
Distributed Event-Based Systems
Gero Mühl, Ludger Fiege, Peter R. Pietzuch
Read about OASIS
Web Services Notification (WSN).
Read about Web Services Eventing (WS-Eventing) on www.w3.org/Submission/WS-Eventing/.
is a synchronous command-and-control
type of pattern.
If a service has to be invoked by a service request, a Service Activator
(ServiceActivator Pattern), which is put in front of a service, receives
the service request from the service consumer, invokes the service and
optionally sends the service response back to the service consumer.
Service Activator > Service
An ESB acts as a mediator between a service consumer and a service provider.
Service Consumer > Enterprise Service Bus > Service Provider
The following operations are performed by the SOA components 'Service
Provider', 'Service Consumer' and 'Service Registry':
1) Service Provider publishes a service at a Service Registry
2) Service Consumer discovers service at a Service Registry
3) Service Consumer binds to the Service Provider and invokes
a service request
4) Depending on the service, a response is sent back to the Service
The Service Registry has to be implemented with the the corresponding
Jack van Hoof has posted
a great article where he describes EAI (Enterprise Application Integration).
Jack van Hoof recommends to "strip the applications down to core
business rules implementations by externalizing shared areas for exchange,
access and persistency."
Jack van Hoof describes "a shared external access area" to
bring applications together at the user interface layer, "a shared
external exchange area" to bring applications together at the business
logic layer and "a shared external persistency area" to bring
applications together at the data layer.
In his recapitulation he writes:
Integration at the data layer: the glue is shared databases, DBMS, data
Integration at the business logic layer : the glue is ESB, SOA, EDA
Integration at the user interface layer (server side): the glue is portlets
Integration at the user interface layer (client side): the glue is mashups
At the client side Mashups
At the server side portals integrate applications with help of portlets.
The ESB (Enterprise Service Bus), has a central role in integrating
enterprise applications. It acts as the mediator between service consumers
and providers in SOA as well as mediator between event emitter and event
handler in EDA. Several commercial implementations are existing and
open source implementations are evolving as well like Fuse
Open Source ESB and Mule
Open Source ESB.
Find more information about EAI/SOA/EDA/CEP on the web:
Jack van Hoof has posted
a great article where he describes EAI.
See an article about how EDA extends SOA written
by Jack van Hoof.
Bobby Woolf has written
an article about SOA, EDA and how useful an ESB is for both of these
Driven Architechture related Weblog by Brenda Michelson
SOA and EDA related
Blogspot by Jack van Hoof
Complex Event Processing
The Complex Event Processing
3rd party links:
|Web references and tutorials
|RSS (Really Simple Syndication)
My name is Mario Imfeld and I am an Enterprise and Solution Architect
focusing at the Java Platform, Enterprise Edition and I am workingas
a Solution Architect / Domain Architect att Volvo Car Corporation in Gothenburg,
I am certified as Sun Certified Enterprise Architect for the Java
Platform, Enterprise Edition 5.
My interests are Information and Communication Technology in general,
SOA - Service Oriented Architecture, EDA - Event-Driven Architecture,
JavaEE - Java Enterprise Edition.
Business areas I have been working for are automotive (Volvo AB, Volvo Car
Corporation), energy (HNG), retail & logistics (DB Schenker), telecom
(Ericsson) and public service (Göteborg Stad).
Other interests are building architecture, spacial planning and design since
I have been working as a building architecture before my IT career.
My IT career:
I got interested in the Information and Communication Technology sector 1996
and started my IT career by studing Information Technology and specifically
Systems Development based on the Java platform. I have been working in the
IT sector since 1998.
I have been working at:
Some of the books I read:
||Volvo Car Corporation
Role: Solution Architect
I started at SemaGroup, aquired by SchlumbergerSema, aquired by
AtosOrigin, aquired by WM-data, aquired by Logica.
During 2004 I was working 4 month at the AtosOrigin office in London.
Type of job:
Design and development of Java and J2EE applications.
Java / J2EE
Development tools used:
IBM Rational Application Developer
CM tools used:
IBM Rational ClearCase, Subversion
Type of job:
Design and development of web applications
ASP, HTML, CSS
Uddevalla, Sweden (short time)
Type of job:
Teacher in web development
I have attended the following courses:
||Distributed Event-Based Systems
Gero Mühl, Ludger Fiege, Peter R. Pietzuch
||Spring, A Developer's Notebook
Bruce A. Tate, Justin Gehtland
||AspectJ in Action, Practical Aspect-Oriented
I have attended the following conference:
||WebSphere Message Broker V6 Application
||Essentials of Rational Unified Process
||Virtual Reality Developer for the industry
I have passed the following examinations:
||IBM WebSphere Conference Wien, Austria, 20.
- 24. May 2002
||Sun Certified Enterprise Architect
for the Java Platform, Enterprise Edition 5
||IBM Certified Specialist Rational Unified
||Sun Certified Web Component Developer
for Java 2 Platform, Enterprise Edition (SCWCD)
||Sun Certified Programmer for Java
2 Platform 1.4 (SCJP)
Internet Information Server 4
Server 4.0 in the Enterprise
Windows NT® Workstation 4
Windows NT® Server 4.0
My Architecture career:
Architecture studies 1980-1986 at ETH
- Eidgenössische Technische Hochschule, Zürich, Switzerland.
Worked at different architecture offices between 1986 and 1996 in Zürich,
Helsinki, Stockholm, Berlin and Karlskrona (SE).
I am a member of the Swedish architecture association formerly called
SAR, nowadays called Sveriges Arkitekter. My professional title is SAR/MSA.
My email adress is email@example.com
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