Book Image

Microservices with Azure

By : Rahul Rai, Namit Tanasseri
Book Image

Microservices with Azure

By: Rahul Rai, Namit Tanasseri

Overview of this book

Microsoft Azure is rapidly evolving and is widely used as a platform on which you can build Microservices that can be deployed on-premise and on-cloud heterogeneous environments through Microsoft Azure Service Fabric. This book will help you understand the concepts of Microservice application architecture and build highly maintainable and scalable enterprise-grade applications using the various services in Microsoft Azure Service Fabric. We will begin by understanding the intricacies of the Microservices architecture and its advantages over the monolithic architecture and Service Oriented Architecture (SOA) principles. We will present various scenarios where Microservices should be used and walk you through the architectures of Microservice-based applications. Next, you will take an in-depth look at Microsoft Azure Service Fabric, which is the best–in-class platform for building Microservices. You will explore how to develop and deploy sample applications on Microsoft Azure Service Fabric to gain a thorough understanding of it. Building Microservice-based application is complicated. Therefore, we will take you through several design patterns that solve the various challenges associated with realizing the Microservices architecture in enterprise applications. Each pattern will be clearly illustrated with examples that you can keep referring to when designing applications. Finally, you will be introduced to advanced topics such as Serverless computing and DevOps using Service Fabric, to help you undertake your next venture with confidence.
Table of Contents (23 chapters)
Title Page
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface
Part 1 – Laying The Foundation
Part 2 – Microsoft Azure Service Fabric
Part 3 – Microservice Architecture Patterns
Part 4 – Supplementary Learning

Asynchronous drivers


Most of the Actor actions are driven as reaction to an input received from the client. However, Actors can update their own state at regular intervals through timers and reminders. Actors can also post updates to the clients on the progress of operations using events. Let's take a brief look at each of these attributes.

Timers

Reliable Actor timers are modelled on timers available in the system.Timers namespace. The timers are usually used to carry out routine operations in the lifetime of an Actor, for example processing input data at a certain rate. You can declare and register a timer in your application using the following code, usually in the OnActivateAsync method:

private IActorTimer _updateTimer; 
protected override Task OnActivateAsync() 
    { 
        ... 

         _updateTimer = RegisterTimer( 
            CallBackMethod,                     // Callback method 
            ObjectParameter,                   // Parameter to pass to 
                        ...