What could be easier than to take your application, wrap it with a Web
Service, announce it or register it in the UDDI and get a SOA Service? Even
better - take a data warehouse, cover a SQL executing code with a Web Service
and expose it to SOA, isn't it simple? This article is for those architects
and managers who like such "simplicity." If you believe that a Web Service
itself doesn't convert an application into the SOA Service, you might read
the article just out of curiosity.
A Service or Not a Service
Discussions about Service Oriented Architecture (SOA) initiated by people
working with legacy applications and data storages like Data Warehouse (DW)
have gotten a lot of press attention recently. While it's good for SOA's
popularity the discussions typically declare a few SOA characteristics and
say something like "We have so rich/important/business crucial data ... (more)
Application architects have heard about the increased importance of security,
but in many cases they really don't know how to approach this issue. In this
article, I'll share my experience and define a few basic steps and
checkpoints for building application architecture with security in mind.
This year, architects have started to face several domestic (SOX and HIPPA)
and even international (Basel II) regulations that require a certain level of
protection of the personal and financial data that's processed and owned by
the companies. Though network and operating system security so... (more)
This article describes two techniques that may be used for assured delivery
of important data, specifically, audit data, in distributed systems. We will
review design that leads from assured to guaranteed delivery. This task gets
more and more important in light of modern global operation risk regulations
and related application risk management.
Business Task and Functional Requirements
Relatively recent operation risk management regulations like Sarbanes-Oxley
(SOX), and in some cases Basel II, require collection of "material evidences"
of user activities that can affect financia... (more)
This article describes a workaround design that allows a Portal to survive if
its resource starts hanging request threads.
Business Task
How frequently does your Portal experience user requests hanging in the
resource? Not frequently, I hope. However, if this happens and the resource
continues hanging user requests, the Portal is exposed to a fatal risk of
spending all of the configured concurrent user requests and eventually dies.
This is a disaster. I faced such situation a few times and decided to protect
my Portal from even rare surprises such as these.
Let a Portal include s... (more)
In this article I'll share my experience in using the new features in Java 5
for solving an old industry problem, the problem of collecting constantly
published financial data in reliable way. The business case example I'm going
to discuss relates to the acquisition of some sort of market data published
by a financial data source system like Reuters.
Data Source Publishing Conditions
Assume a Data Source allows for a consumer subscription that results in
publishing market data messages via a DataFeed Channel. The consumer can
listen to the messages, get them from the Event Queue, ... (more)
Michael Poulin works as an enterprise-level solution architect in the financial industry in the UK. He is a Sun Certified Architect for Java Technology, certified TOGAF Practitioner, and Licensed ZapThink SOA Architect. Michael specializes in distributed computing, SOA, and application security.
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