Name: Enterprise Application Architecture with .NET Core
Author: Ganesan Senthilvel Ovais Mehboob Ahmed Khan Habib Ahmed Qureshi
ISBN: 9781786469373

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Enterprise Application Architecture with .NET Core

Ganesan Senthilvel Ovais Mehboob Ahmed Khan Habib Ahmed Qureshi

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Credits
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Dedication
Preface
What this book covers
What you need for this book
Who this book is for
Conventions
Reader feedback
Customer support
Downloading the example code
Downloading the color images of this book
Errata
Piracy
Questions
Enterprise Architecture Concepts
Why do we need Enterprise Architecture?
Definition of Enterprise Architecture
Stakeholders of Enterprise Architecture
Business benefits
Knowing the role of an architect
Role comparison between EA and SA
Degree of Comparisons
Commonly known EA Frameworks
General Purpose Frameworks
Domain Specific Frameworks
Architecture segregation
Business Architecture
Data Architecture
Application Architecture
Technology Architecture
Introduction to TOGAF
Evolution of TOGAF 9.1
Core components
Industry usage
Introduction to Zachman
Evolution
Core components
Summary
Principles and Patterns
Getting started with principles and patterns
Why follow design principles?
What are design patterns?
Why use design patterns?
SOLID design principles
SRP - Single Responsibility Principle
SRP example - The decorator pattern
OCP - Open Closed Principle
LSP - Liskov Substitution Principle
ISP - Interface Segregation Principle
DIP - Dependency Inversion Principle
Dependency injection
Introducing dependency injection
Knowing about the Service Locator pattern
Dependency injection support with .NET Core
GoF design patterns
What are software design patterns?
Creational patterns
The singleton pattern
Variations on the singleton pattern
The factory method pattern
Abstract factory pattern
Builder pattern
A commentary on creational patterns
Structural patterns
Adapter pattern
Bridge pattern
Flyweight pattern
A commentary on structural patterns
Behavioral patterns
The template method pattern
The observer pattern
The chain of responsibility pattern
The visitor pattern
The strategy pattern
The state pattern
A commentary on behavioral patterns
Summary
Distributed Computing
Understanding Distributed applications
Definition
Comparison
Multiprogramming
Thread synchronization
Storage
Process
Concurrency
Parallelism
Multithreading exercise
ThreadStart
ThreadPool
Task Parallel Library (TPL)
Design challenges
Transparency
Reliability
Fault tolerance
Performance
Decompose
Caching
Scalability
Scale up
Scale out
Comparing scale up with scale out
Connecting the dots
Security
Goals
Attack
Threats
Summary
Software Development Life Cycle
What is SDLC?
Need for a process
Insight of core phases
SDLC models
The Waterfall model
Core phases
Business requirement
System analysis
System Design
Coding
Testing
Maintenance
Understanding the Spiral model
Core phases
Comparing the Waterfall model with the Spiral model
Benefits
Challenges
Usage recommendation
Agile model
Top five reasons to adopt Agile
Ambiguous requirements
Requirement changes
Big planning is not practical
Software review is better than document
Iterative incremental delivery is preferred
Industry evidence
Scaled Agile Framework (SAFe)
History
Success Factors
Microsoft open source strategy to life cycle
Traditional Microsoft model and its origin from MS-DOS
Driving factors of the open source model
Twin tracks of .NET Framework and .NET Core
Comparing .NET with .NET Core
Current stack of open source tools and techniques
Summary
Enterprise Practices in Software Development
What is ALM?
Core aspects
ALM vs SDLC
Source Code Control System
Git
TFS
Git vs TFS
Visual Studio Integration
Team Foundation Version Control (TFVC)
Git
Developing .NET Core project templates for enterprise applications
Creating a custom .NET Core project template using .NET command-line interface tools
Performance measuring for .NET applications
CPU utilization
Using the Sampling method in Visual Studio to collect performance statistics
Measuring UI responsiveness
Analysing memory leaks
Identifying memory leaks
Summary
Layered Approach to Solution Architecture
Layers in layered architecture
Presentation layer
Service layer
Business layer
Transaction Script pattern
Table Module pattern
Active Record pattern
Domain Driven Design (DDD) pattern
Data access layer
Objectives of layered architecture
Practical implementation of layered architecture in .NET Core
Scope
Logical architecture
Presentation layer
Service layer
Business layer
Data access layer
Common layer
Setting up the environment
Creating the solution
Creating the common layer
Entities mapped to database tables
Business objects
Logging events
Logging helper
Data access layer
Creating Data Context
Creating DbFactory
Repository pattern
Unit of Work pattern
Running migration
Business layer
Develop core classes
Developing business managers
Logging in .NET Core
Creating the service layer
Creating base controller
Adding Custom Action Filters
Add controllers
Creating the presentation layer
Single Page Applications
Benefits of a SPA
Developing the presentation layer using ASP.NET Core and Angular
Setting up frontend packages
Configuring the ASP.NET Core pipeline
Adding the Angular components
Creating MVC Controllers and Views
Summary
SOA Implementation with .NET Core
SOA definition
What is SOA?
SOA modeling
SOA Reference Model
Reference model and reference architecture relationship
SOA Reference Architecture
Common reference information architecture
Common reference Infrastructure architecture
SOA features and components
Service Component Architecture
Service types
Service composition
Service orchestration
Service choreography
Common technology standards
Service discovery
Message broker
Enterprise Service Bus (ESB)
ESB Segments
ESB features
Data
Master Data Management (MDM)
Common data model
Live business metrics
Services gateway
SOA services library
Tracking, logging, and error handling in SOA
Notes
Sample SOA implementation
Introduction
Sample enterprise
Departments of a sample enterprise
Sample data models for departments
Sample business processes for departments
Sample database models for departments
Bounded contexts
Services implementation
Solution structure
Sample database
Sample development and system services
Sample information service
Employee information SOA service
Employee Information business logic layer
Repositories in the data access layer
Employee information core data access layer
Entity in an employee information model
Sample adapter service
Sample background service
Sample interaction (notification) service
Sample mediation service
Sample scenario of a service choreography
Summary
Cloud-Based Architecture and Integration with .NET Core
Cloud Computing Models
Infrastructure as a Service (IaaS)
Platform as a Service (PaaS)
Software as a Service (SaaS)
Azure compute
Virtual machines
Cloud services
Worker Role
Web Role
App Services
Azure Service Fabric
Features comparison between virtual machines, cloud services, Azure App Services, and Service Fabric
Rapid application development using Azure App Services
Web Apps
Hosting an ASP.NET Core application on Azure
Deployment slots
API Apps
Configuring Swagger in ASP.NET Core Web API and deploying on Azure
Creating proxy classes using AutoRest in .NET Core
Enable CORS
Mobile Apps
Offline sync
Push notifications
Logic Apps
Connectors
Trigger
Actions
Creating Logic App in Azure
Scaling Azure App Services
Background services and event handling in cloud
WebJobs
Developing WebJob using .NET Core
Developing WebJobs using WebJobs SDK and .NET Framework 4.5
Azure WebJobs versus Azure WorkerRoles
Using WebHooks for event-based scenarios
Using WebHook of WebJob from VSTS
Azure Functions
Creating a basic Azure Function to listen for Queue events
Scalability and performance options in Azure App Services
Increasing storage performance
Command-Query Responsibility Segregation (CQRS) pattern
Denormalization
Azure Table storage
MongoDB
Caching
Local cache
Shared cache
Using Redis Cache in Azure
Creating the Redis Cache
Configuring the .NET Core app to use Redis Cache on Azure
Queuing
Logging and monitoring in Azure
Logging
ASP.NET Core logging in Azure
Web server diagnostics
Application diagnostics
Accessing logs
Accessing logs via FTP
Accessing Logs via Azure PowerShell
Monitoring
SCOM (System Center Operations Manager)
Application Insights
Application hosted on Azure
Application hosted on-premise
Use Application Insights API
Setting up Application Insights in ASP.NET Core Application
Summary
Microservices Architecture
Microservices architecture definition
What is microservices architecture?
Microservices and SOA
Microservices and monolithic applications
Web API and web services
Characteristics of a microservices architecture
Best for microservices architecture
Documentation
Business capabilities
Business processes
Microservice interfaces
Microservice code
Microservice data store
Logging and monitoring
Immutable Infrastructure
Containerization
Stateless
Architectural elements
Bounded Context in Domain Driven Design
DDD (Domain Driven Design)
Guiding principles
Foundational concepts
Bounded context
Microservices come in systems
Service discovery
Client-side service discovery
Server-side service discovery
Service registry
API gateway
Architectural motivations
Agile Manifesto
Reactive Manifesto
Reactive systems
Reactive microservices architecture
Key aspects of Reactive Microservices
Serverless architecture
Backend as a Service (BaaS)
Function as a Service (FaaS)
Key aspects of serverless architecture
Type of code
Stateless
Short-lived
Almost zero administration
Automatic scaling
Event-driven
Let s wrap it up
Azure for microservices
Azure Functions
Azure Service Fabric
Azure Container Service
Bringing it together
Implementation samples
Microservices architecture for our sample enterprise
Problem domains
Publishing team
Marketing team
Sales team
Platform administration team
Other teams
Contexts for the respective teams
Customer Relationship Management system
Document Management System
Understanding the Microservices Bounded Team Contexts
General service information flow
Sales Team Context
Marketing Team Context
Publishing Team Context
Platform Administration Team Context
Enterprise portal mockup
Overall microservices architecture
Common communication mechanismsin microservices
Serverless architecture for a sample application
Our sample application - Home automation
High-level application design
Serverless architecture in Azure
Let s wrap it up
Summary
Security Practices with .NET Core
Authentication and authorization modes
Securing applications with ASP.NET Core Identity
Security architecture in ASP.NET Core
Getting to know the core APIs of the Identity system
HttpContext and AuthenticationManager
Understanding the authentication and authorization process
Authentication
Implementing authentication using ASP.NET Core Identity and customizing the Identity data store
Configuring authentication using Identity in an empty web application project
Configuring Entity Framework Core
Defining data context and user classes
Configuring database connection and application configuration settings
Configuring Entity Framework and Identity services
Enabling authentication using Identity
Creating an identity data store in SQL server
Customizing existing Identity data store and adding new entities
Creating and Signing-in/Signing-out users
Adding claims in ASP.NET Identity membership
How authorization works
Using cookie middleware without ASP.NET Core Identity
Claims transformation
Cookie middleware events
Implementing external authentication in ASP.NET Core applications
Configuring external authentication in ASP.NET Core
Creating a web application project
Configuring apps on Facebook
Enabling Facebook middleware
Two-factor authentication
Setting up an SMS account
Enabling two-factor authentication
Security in an enterprise
Getting started with IdentityServer4
Understanding OAuth
Actors in OAuth
Flows of OAuth 2.0
Client credentials flow
Implicit flow
Authorization code flow
Resource owner password credentials flow
Understanding OpenID Connect
OpenID Connect flows
Authorization code flow
Implicit flow
Hybrid flow
Claims and scopes
Endpoints
Discovery endpoint
Authorize endpoint
Token endpoint
UserInfo endpoint
Developing a Centralized Authorization System using IdentityServer4
Creating a Centralized Authentication Service/Authorization Server
Setting up IdentityServer4
Defining scopes, clients and users
Adding UI to enable authentication using OpenID Connect
Creating an MVC web application project
Adding OIDC and cookie middleware in HTTP pipeline
Enabling MVC and controller
Adding a Web API
Authorization
Declarative authorization techniques
Basic authorization
Authorization filters
Filtering based on authentication schemes
Filtering based on authorization
Filtering based on policy
Custom policies
Imperative authorization techniques
Safe storage
Storing and retrieving safe storage values
Summary
Modern AI Offerings by Microsoft
Virtual machines and containerization
Virtual machine
Simulation
Emulation
Virtual machine implementation base
Containerization
Evolution of containerization concepts
Chroot
FreeBSD Jails
Solaris Zones
OpenVZ
Cgroups
LXC
Lmctfy
Docker
Modern container fundamentals
Docker components
Docker Engine
Docker Compose
Docker Machine
Docker registry
Docker Kitematic
Docker Swarm
Swarm mode
Docker Cloud
Docker containerization in Windows
Docker for Windows
Windows Containers
Modern development
Development editors
Development environment setup
Vagrant
Cloud development and test environment
DevOps
The Culture
Key motivational aspects
Sharing
Automation
Measurement
Software development and delivery process
Continuous Integration
Best practices
Benefits of CI
Improvement in Developer productivity
Quick identification and addressing of bugs
Faster Updates Delivery
Continuous Delivery
Continuous Delivery Pipeline
DevOps toolchain
A sample microservices application based on Docker containers
The sample application
Problem statement
Application architecture
Technical architecture
Setup in Azure Container Service
Architecture diagram
Network architecture
What is visible in this diagram?
Hands-on prerequisites
Why Azure Container Service?
Azure App Service (on) Linux
Creating VM directly on Azure
Azure Service Fabric (ASF)
Azure Container Service (ACS)
Implementing the Math app
Implementation approach
Implementation Steps
Installing the Hypervisor
CentOS virtual machine
CentOS configuration
Container installation and execution
Uploading container images to container registry
Creating Azure Container Service
Container installation and execution on ACS
Big Data and Microsoft
Definition of Schema
Schema free - NoSQL
Fixed vs no schema
NoSQL types
Architectural best practices
Microsoft HDInsight
HDInsight ecosystem
Introduction to Business Intelligence (BI)
Current trend
Road map
Power BI architecture
Power BI layers
Artificial intelligence (AI)
Core components
Machine learning (ML)
Data mining
Interconnectivity
AI at Microsoft
Industry Bots
Microsoft open source strategy
Cognitive Services
Microsoft Bot
Summary

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Enterprise Application Architecture with .NET Core