Continuous Architecture in Practice: Software Architecture in the Age of Agility and DevOps

Cover
Half Title
Title
Copyright
Dedication
Contents
Series Editor Foreword
Foreword
Introduction
Acknowledgments
About the Authors
Chapter 1: Why Software Architecture Is More Important than Ever
	What Do We Mean by Architecture?
	Software Industry Today
	Current Challenges with Software Architecture
		Focus on Technology Details Rather than Business Context
		Perception of Architects as Not Adding Value
		Architectural Practices May Be Too Slow
		Some Architects May Be Uncomfortable with Cloud Platforms
	Software Architecture in an (Increasingly) Agile World
		The Beginnings: Software Architecture and Extreme Programming
		Where We Are: Architecture, Agility, and Continuous Delivery
		Where We May Be Going
	Introducing Continuous Architecture
		Continuous Architecture Definition
		Continuous Architecture Benefits
	Applying Continuous Architecture
		Continuous Architecture Provides a Set of Principles and Tools
	Introduction to the Case Study
		Case Study Context: Automating Trade Finance
	Summary
Chapter 2: Architecture in Practice: Essential Activities
	Essential Activities Overview
	Architectural Decisions
		Making and Governing Architectural Decisions
	Quality Attributes
		Quality Attributes and Architectural Tactics
		Working with Quality Attributes
		Building the Quality Attributes Utility Tree
	Technical Debt
		Capturing Technical Debt
		How to Manage Technical Debt
	Feedback Loops: Evolving an Architecture
		Fitness Functions
		Continuous Testing
	Common Themes in Today’s Software Architecture Practice
		Principles as Architecture Guidelines
		Team-Owned Architecture
		Models and Notations
		Patterns and Styles
		Architecture as a Flow of Decisions
	Summary
Chapter 3: Data Architecture
	Data as an Architectural Concern
		What Is Data?
		Common Language
	Key Technology Trends
		Demise of SQL’s Dominance: NoSQL and Polyglot Persistence
		Scale and Availability: Eventual Consistency
		Events versus State: Event Sourcing
		Data Analytics: Wisdom and Knowledge from Information
	Additional Architectural Considerations
		Data Ownership and Metadata
		Data Integration
		Data (Schema) Evolution
	Summary
	Further Reading
Chapter 4: Security as an Architectural Concern
	Security in an Architectural Context
		What’s Changed: Today’s Threat Landscape
		What Do We Mean by Security?
		Moving Security from No to Yes
		Shifting Security Left
	Architecting for Security
		What Is a Security Threat?
		Continuous Threat Modeling and Mitigation
		Techniques for Threat Identification
		Prioritizing Threats
		Other Approaches
	Architectural Tactics for Mitigation
		Authentication, Authorization, and Auditing
		Information Privacy and Integrity
		Nonrepudiation
		System Availability
		Security Monitoring
		Secrets Management
		Social Engineering Mitigation
		Zero Trust Networks
		Achieving Security for TFX
	Maintaining Security
		Secure Implementation
		People, Process, Technology
		The Weakest Link
		Delivering Security Continuously
		Being Ready for the Inevitable Failure
		Security Theater versus Achieving Security
	Summary
	Further Reading
Chapter 5: Scalability as an Architectural Concern
	Scalability in the Architectural Context
		What Changed: The Assumption of Scalability
		Forces Affecting Scalability
		Types and Misunderstandings of Scalability
		The Effect of Cloud Computing
	Architecting for Scalability: Architecture Tactics
		TFX Scalability Requirements
		Database Scalability
		Data Distribution, Replication, and Partitioning
		Caching for Scalability
		Using Asynchronous Communications for Scalability
		Additional Application Architecture Considerations
		Achieving Scalability for TFX
	Summary
	Further Reading
Chapter 6: Performance as an Architectural Concern
	Performance in the Architectural Context
		Forces Affecting Performance
		Architectural Concerns
	Architecting for Performance
		Performance Impact of Emerging Trends
		Architecting Applications around Performance Modeling and Testing
		Modern Application Performance Tactics
		Modern Database Performance Tactics
		Achieving Performance for TFX
	Summary
	Further Reading
Chapter 7: Resilience as an Architectural Concern
	Resilience in an Architectural Context
		What Changed: The Inevitability of Failure
		Reliability in the Face of Failure
		The Business Context
		MTTR, Not (Just) MTBF
		MTBF and MTTR versus RPO and RTO
		Getting Better over Time
		The Resilient Organization
	Architecting for Resilience
		Allowing for Failure
		Measurement and Learning
	Architectural Tactics for Resilience
		Fault Recognition Tactics
		Isolation Tactics
		Protection Tactics
		Mitigation Tactics
		Achieving Resilience for TFX
	Maintaining Resilience
		Operational Visibility
		Testing for Resilience
		The Role of DevOps
		Detection and Recovery, Prediction and Mitigation
		Dealing with Incidents
	Disaster Recovery
	Summary
	Further Reading
Chapter 8: Software Architecture and Emerging Technologies
	Using Architecture to Deal with Technical Risk Introduced by New Technologies
	Introduction to Artificial Intelligence, Machine Learning, and Deep Learning
		Types of Machine Learning
		What about Deep Learning?
	Using Machine Learning for TFX
		Types of Problems Solved by ML, Prerequisites and Architecture Concerns
		Using Document Classification for TFX
		Implementing a Chatbot for TFX
	Using a Shared Ledger for TFX
		Brief Introduction to Shared Ledgers, Blockchain, and Distributed Ledger Technology
		Types of Problems Solved by Shared Ledgers, Prerequisites, and Architectural Concerns
		Shared Ledger Capabilities
		Implementing a Shared Ledger for TFX
		Benefits of an Architecture-Led Approach
	Summary
	Further Reading
Chapter 9: Conclusion
	What Changed and What Remained the Same
	Updating Architecture Practice
	Data
	Key Quality Attributes
		Security
		Scalability
		Performance
		Resilience
	The Architect in the Modern Era
	Putting Continuous Architecture in Practice
Appendix A: Case Study
Appendix B: Comparison of Technical Implementations of Shared Ledgers
Glossary
	A
	B
	C
	D
	E
	F
	H
	I
	K
	M
	P
	Q
	R
	S
	T
	U
Index
	A
	B
	C
	D
	E
	F
	G
	H
	I
	J-K
	L
	M
	N
	O
	P
	Q
	R
	S
	T
	U-V-W
	X-Y-Z