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Innovate at scale through well-architected API-led products that drive personalized, predictive, and adaptive customer experiences

Key Features

  • Strategize your IT investments by modeling enterprise solutions with an API-centric approach
  • Build robust and reliable API platforms to boost business agility and omnichannel delivery
  • Create digital value chains through the productization of your APIs

Book Description

API-centric architectures are foundational to delivering omnichannel experiences for an enterprise. With this book, developers will learn techniques to design loosely coupled, cloud-based, business-tier interfaces that can be consumed by a variety of client applications.

Using real-world examples and case studies, the book helps you get to grips with the cloudbased design and implementation of reliable and resilient API-centric solutions. Starting with the evolution of enterprise applications, you’ll learn how API-based integration architectures drive digital transformation. You’ll then learn about the important principles and practices that apply to cloud-based API architectures and advance to exploring the different architecture styles and their implementation in Azure. This book is written from a practitioner’s point of view, so you’ll discover ideas and practices that have worked successfully in various customer scenarios.

By the end of this book, you’ll be able to architect, design, deploy, and monetize your API solutions in the Azure cloud while implementing best practices and industry standards.

What you will learn

  • Explore the benefits of API-led architecture in an enterprise
  • Build highly reliable and resilient, cloud-based, API-centric solutions
  • Plan technical initiatives based on Well-Architected Framework principles
  • Get to grips with the productization and management of your API assets for value creation
  • Design high-scale enterprise integration platforms on the Azure cloud
  • Study the important principles and practices that apply to cloud-based API architectures

Who this book is for

This book is for solution architects, developers, engineers, DevOps professionals, and IT decision-makers who are responsible for designing and developing large distributed systems. Familiarity with enterprise solution architectures and cloud-based design will help you to comprehend the concepts covered in the book easily.

Table of Contents

Designing API-First Enterprise Architectures on Azure
About the author
About the reviewer
Who this book is for
What this book covers
To get the most out of this book
Download the color images
Conventions used
Get in touch
Share Your Thoughts
Section 1: API-Led Architecture in the Digital Economy
Chapter 1: Evolution of Enterprise Solution Architectures
History of application architectures in an enterprise
From monoliths to SOA and microservices
IT strategies in the modern world
Outlook for digital transformation
The emergence of API-led architectures
The complexity problem
The importance of API-led architecture
Case study
About Packt Insurance Inc.
Further reading
Chapter 2: APIs as Digital Connectors
The connected enterprise
The role of APIs in digital experiences
Major benefits of API-led connectivity
APIs serve as digital enablers for an enterprise
An API is a digital service
API architecture within an enterprise
API classification by management and access pattern
Packt Insurance Inc. – an API-led architecture strategy
Domain decomposition
Service and persona map
API composability using microservices
Further reading
Section 2: Build Reliable API-Centric Solutions
Chapter 3: Architecture Principles and API Styles
Architecture principles
Evolve architecture blueprints iteratively
Constructs of an API
API operations or service contract
Data contract or entity schema
API endpoint
Communication protocol (application layer)
Input and output – the request-response pair
Popular API architecture styles
The tunneling or RPC style
RI (or REST) style
Query or GraphQL style
Event-driven or asynchronous messaging style
Hypermedia style
Other API styles
Finding the right style for your API use cases
Serverless APIs – accelerators for innovation
Benefits of using serverless computing for APIs
Serverless architecture use cases
Implementing API-led architectures in Azure
Reference architecture for an enterprise API platform
Azure services for hosting API solutions
Service Fabric
Additional services for building end-to-end solutions
Case study elaboration – Packt Insurance Inc.
API style fitment analysis
Microservices and API styles
API platform architecture
Additional reading
Chapter 4: Assuring the Quality of the API Service (or Product)
The ISO 25010 standard for software product quality
Functional Suitability
Performance Efficiency
Architecture Tradeoff Analysis Method (ATAM)
The Azure Well-Architected Framework
Benefits of using WAF
WAF recommended practices
API security considerations
Core principles – the Security Frame analysis
The Security Development Lifecycle (SDL)
Reliability through scale, performance, availability
Site Reliability Engineering (SRE)
How do you ensure appropriate reliability?
Commonly used SLOs for an API service
Defining, implementing, and measuring SLI metrics for an API platform
Using SLIs to calculate the initial SLOs for your API service
Modeling performance based on scale requirements
The API (or application) performance management lifecycle
Checklist for development teams
High-availability patterns
High-availability calculation
Architecting for operations
Logging, monitoring, and alerts
Feature flags
Understanding maintainability
Proactive maintainability
Reactive maintainability
Tracking objectives using a quality dashboard
Case study elaboration – Packt Insurance Inc.
Important SLOs for the API platform
Architecture backlog – focus on quality and handle technical debt
Further reading
Chapter 5: RESTful APIs – the New Web
Technical requirements
Understanding RESTful APIs
Using HTTP verbs for your CRUD actions correctly
History of inter-machine application communication
REST architecture constraints
Advantages and challenges of building a RESTful API
Common challenges
Exploring the checklist for building RESTful APIs
Contract-first design for your REST APIs
OpenAPI Specification
OpenAPI definition file format
Visualizing the API definition file using the Swagger extension in VSCode
Further reading
Chapter 6: API Design Practices
Understanding API design considerations
Client complexity
Cognitive complexity
Exploring recommended practices
Design should adhere to the SOLID principles
Design should be flexible to change
Use the Decision Analysis and Resolution technique
Produce documentation as per industry standards
Secure by design
Optimized for response time
API testing
Size and granularity
Content negotiation
Prefer stateless over stateful services
User-digestible response codes and messages
Using cloud design patterns
Implementing an API service using design patterns
Data-driven CRUD API
Command and Query Responsibility Segregation (CQRS)
Event Store API (Event Sourcing)
Clean architecture
Backends for Frontends (BFF)
Developer toolbox
Further reading
Chapter 7: Accelerating through DevOps Essentials
Business objectives and key results
The DevOps Dojo framework
The benefits of having a good DevOps strategy
DevOps metrics and their importance
Identifying the maturity index for your enterprise
The power of GitHub and Azure DevOps
DevOps in practice
Capability – continuous planning
Capability – continuous integration
Capability – continuous delivery
Capability – continuous operations
Capability – continuous quality
Capability – continuous security
Capability – continuous collaboration
Capability – continuous improvement
Pillar – culture
Pillar – lean product
Pillar – architecture
Pillar – technology
Tracking DevOps initiatives in the backlog
Further reading
Section 3: Deliver Business Value for a Modern Enterprise
Chapter 8: API-Centric Enterprise Integrations
Exploring EAI
Key initiatives toward a digital enterprise
Modernizing legacy applications using APIs
API use cases in the enterprise
The rise of iPaaS
What is an iPaaS platform?
Types of integrations
Benefits of iPaaS
iPaaS architecture for the Azure cloud
Implementing EAI patterns using iPaaS
API management
API gateways
API publishing, control, and governance
Developer portal
API versioning and life cycle management
Analytics and metrics
Understanding Azure Integration Services
iPaaS building blocks of Azure – explained
Using Azure Integration Services
Further reading
Chapter 9: APIs as a Monetized Product
APIs as digital assets
Growth of the API economy
The API value chain
Exploring business drivers of monetization
Expand the channels of revenue streams
Capture analytics for improved marketing strategies
Enhance brand value through customer loyalty
Foster innovation through new product capabilities
Stay relevant in the marketplace
API monetization models
Consumer pays
Consumer gets paid
Indirect monetization
API productization in Azure
Requirements summary
Solution approach
API products and publishing in APIM
Subscription management
API consumption – rate limits and quotas
Measuring API consumption
API analytics
Further reading
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Product information

ASIN ‏ : ‎ B0978TMFNW
Publisher ‏ : ‎ Packt Publishing (August 24, 2021)
Language ‏ : ‎ English
Paperback ‏ : ‎ 290 pages
ISBN-10 ‏ : ‎ 1801813914
ISBN-13 ‏ : ‎ 978-1801813914

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