In the current software design world, we already have time-tested software solutions for specific recurring problems. Best practices and the way that software design solves the repeatable problems in a quick and cost-effective manner creates reusable patterns over time, and it is a rule of thumb that we should be able to pick up and use the right ones for our design problems.

SOA deals with a number of design patterns, and numerous materials discuss each one in depth. We would like to touch upon a few of the most important ones that real-time software solutions often require.

We will deal with the following patterns in this chapter: 

• Service messaging
• Message screening
• Agnostic services
• Atomic service transaction
• Authentication broker
• Message origin authentication
• Service façade
• Multiple service contracts
• Service callback
• Event-driven messaging
• Service refactor
• Metadata centralization