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Refactoring Legacy Applications: A Case Study

To refactor legacy code, the ideal is to have a suite of unit tests to prevent regressions. However it's not always that easy. This article describes a methodology to safely refactor legacy code.

Chen Ping
on Feb 27, 2013
Interview and Book Review: Spring Integration in Action

Spring Integration in Action book, authored by Mark Fisher, Jonas Partner, Marius Bogoevici and Iwein Fuld, covers the Spring Integration framework which provides an implementation of Enterprise Integration Patterns based on Spring programming model. InfoQ spoke with authors about the book, Spring Integration framework, its strengths and limitations.

Srini Penchikala
on Nov 14, 2012
Virtual Panel: NoSQL Database Patterns and Polyglot Persistence

NoSQL database space has different databases that support different data storage patterns. InfoQ spoke with four panelists about the current state of NoSQL adoption, architecture patterns supported by different NoSQL databases, polyglot persistence and security aspects when using NoSQL databases.

Srini Penchikala
on Jul 03, 2012
Designing and Developing Cross-Cutting Features

Every developer has had to integrate with another system, API or component at one point or another. And, often, a business feature must span systems. If you’ve been on a project like this or have one in the pipeline then this article provides strategies to handle the change. Also, this article covers separating system boundaries and what that means for your technical design.

Stephen Rylander
on May 23, 2012
Architecture & Design

Healthy Architectures - Using CQRS and Event Sourcing for Electronic Medical Records

The health care industry has been migrating to electronic medical/health records (EMR/EHR) for some time. Hopwever, problems such as performance and scalability, along with maintaining traceability and reconstructing healthcare related business events need to be addressed. The article introduces the use of techniques and patterns for providing these quality attributes.

Arunava Chatterjee
on Mar 12, 2012
Faster, Better, Higher – But How?

One of the main challenges when designing software architecture is the consideration of quality attributes. Not only their design turns out to be difficult, but also the specification of these attributes. Consequently, many problems in software systems are directly related to the specification and design of quality attributes such as modifiability or performance, to name just a few.

Michael Stal
on Feb 20, 2012
Interview and Book Excerpt: Service Design Patterns

"Service Design Patterns" catalogs design patterns that cover the entire lifecycle of web services. This book is the latest addition to the Martin Fowler signature series which also contains a section on consumer driven contracts contributed by Ian Robinson. InfoQ talked to Rob Daigneau, the author of the book, regarding various topics related to the core idea behind "Service Design Patterns".

Jeevak Kasarkod
on Jan 20, 2012
Succeeding with Dependency Injection

While the principal pattern is easy to understand it can be difficult to succeed with Dependency Injection without considering the larger context. DI is an application of the principle of Inversion of Control and to succeed with IoC you’ll also need to invert your thinking. This article provides a sketch of the mental model you need to adopt to succeed with DI.

Mark Seemann
on Dec 19, 2011
Introduction to Cloud Security Architecture from a Cloud Consumer's Perspective

Security concerns are the number one barrier to cloud services adoption. How do we evaluate a vendor's solution? What is an optimal security architecture? What are consumer versus provider responsibilities? What are industry standard patterns in this regard? This article answers some of these questions based on first hand experience dealing with large scale cloud adoption.

Subra Kumaraswamy
on Dec 07, 2011
Interview and Book Review: Pro HTML5 and CSS3 Design Patterns

"Pro HTML5 and CSS3 Design Patterns" catalogs many common patterns in modern HTML5 applications. InfoQ talked to one author, Dionysios Synodinos, about the book and working with HTML5.

Werner Schuster
on Dec 02, 2011
Finding the Right Data Solution for Your Application in the Data Storage Haystack

With the recent NoSQL movement there are several alternative data storage solutions available compared to the traditional relational databases. In this article, author Srinath Perera discusses the various data storage options and what to consider when choosing each of these solutions.

Srinath Perera
on Oct 26, 2011
Agile Schools: How Technology Saves Education (Just Not the Way We Thought it Would)

People from President Obama to Bill Gates propose that technological innovation is the key to improving our schools. But tech products and concepts may not be as influential as tech processes and culture. Applying the Agile methodology to school operation could catalyze dramatic change by bringing a proven systematic solution to one of the most challenging social issues of our age.

Steve Peha
on Jun 28, 2011

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