Book Image

Modernizing Legacy Applications to Microsoft Azure

By : Steve Read, Larry Mead
Book Image

Modernizing Legacy Applications to Microsoft Azure

By: Steve Read, Larry Mead

Overview of this book

Organizations have varying circumstances, objectives, and prerequisites when contemplating a hyper-scale cloud solution transformation to a platform such as Azure. Modernizing Legacy Applications to Microsoft Azure uncovers potential scenarios and provides choices, methodologies, techniques, and prospective possibilities for transitioning from legacy applications to the Microsoft Azure environment. You’ll start by understanding the legacy systems and the main concerns regarding migration. Then, you’ll investigate why distributed architectures are compelling and the various components of the Azure platform needed during migration. After that, you’ll explore the approaches to modernizing legacy applications and the Rs of modernizing (i.e., rehost, refactor, rearchitect, and retire). You’ll also learn about integration approaches and potential pitfalls. By the end of this book, you’ll be well equipped to modernize your legacy workloads while being aware of pitfalls and best practices.
Table of Contents (18 chapters)
1
Part 1: Legacy Estate Options
3
Chapter 2: Strategies for Modernizing IBM and Unisys Mainframes
6
Part 2: Architecture Options
10
Part 3: Azure Deployment and Future Considerations

Understanding Azure’s features for integration

When it comes to integration, there are several services within Azure you can leverage, each with a particular focus, depending on what kind of integration scenario you are working on. Let’s take a look at them:

  • Azure Logic Apps: When you are creating applications that need to integrate with a variety of other cloud-based services or applications as well as on-premises applications, you will probably need to look at Azure Logic Apps. It allows you to create workflows so that you can integrate business processes. Remember service-oriented architecture (SOA) – this allows you to build those types of applications in Azure.
  • Azure Service Bus: Another popular programming paradigm is pub-sub (publish-subscribe). This is where an application publishes messages to other applications. You might also need a service broker to ensure guaranteed delivery of messages. When you need that type of functionality, you need...