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Frameworks, patterns, and concepts that Java developers need to be successful in a microservices world.
Enterprise Java Microservices is an example-rich tutorial that shows how to design and manage large-scale Java applications as a collection of microservices.
Part 1: Microservices Basics
1 Enterprise Java microservices
1.1 Enterprise Java pitfalls
1.1.1 What is Enterprise Java?
1.1.2 Typical Enterprise Java Architecture
1.1.3 What is a Monolith?
1.1.4 What are the problems associated with monoliths?
1.2 Microservices and Distributed Architecture
1.2.1 Do One Thing Well
1.2.2 What is a Distributed Architecture?
1.2.3 Why should I care about being Distributed?
1.2.4 What can be done to assist in developing microservices?
1.2.5 Product over Project
1.2.6 Continuous integration and delivery
1.3 Patterns for migration to microservices
1.3.1 Domain Driven Design
1.3.2 Big Bang Pattern
1.3.3 Strangler Pattern
1.3.4 Hybrid Pattern
1.4 What are Enterprise Java microservices?
1.4.1 Why Enterprise Java is a good fit for microservices
2 Developing a Simple RESTFul microservice
2.1 Cayambe Monolith
2.2 New administration site
2.2.1 Use cases
2.2.2 Architecture of the application
2.2.3 Creating RESTFul endpoints with JAX-RS
2.2.4 Running it
3 Just enough Application Server for microservices
3.1 Just enough Application Server
3.1.1 3.1.1 What does JeAS mean?
3.1.2 What are the benefits?
3.1.3 Eclipse MicroProfile
3.2 Choosing Just enough Application Server
3.2.1 Beach Vacation example application
3.2.2 Dropwizard — The Original Opinionated microservice runtime
3.2.3 Payara Micro — Slimmed Java EE App Server in a Jar
3.2.4 Spring Boot — Opinionated Spring microservices
3.2.5 Thorntail — The most flexible JeAS runtime
3.2.6 How do they compare?
4 Microservice Testing
4.1 What type of testing do we need?
4.2 Unit testing
4.3 What is immutability?
4.4 Integration Testing
4.5 Consumer Driven Contract Testing
4.6 Additional Reading
4.7 Additional Exercises
5 Cloud Native Development
5.1 What is Cloud anyway?
5.2 Service Models
5.3 Cloud Native Development
5.4 Deploying to the Cloud
5.5 Starting Minishift
5.6 Microservice Cloud deployment
5.7 Testing in the Cloud
5.8 Additional Exercises
Part 2: Implementing Enterprise Java microservices
6 Consuming microservices
6.1 Consuming a microservice with a Java Client Library
6.1.2 Apache HttpClient
6.2 Consuming a microservice with a JAX-RS Client Library
6.2.1 JAX-RS Client
6.2.2 RESTEasy Client
7 Discovering microservices for Consumption
7.1 Why does a microservice need to be discovered?
7.1.1 What is Service Discovery?
7.1.2 What are the benefits of Service Discovery and a Registry?
7.1.3 Stateless vs Stateful microservices
7.1.4 What is Netflix Ribbon?
7.2 Registering a microservice with Thorntail
7.2.1 Thorntail’s Topologies
7.2.2 Registering a microservice with a Topology
7.3 Consuming a registered microservice with Thorntail
7.3.1 Service lookup with Netflix Ribbon
7.3.2 Service lookup with RESTEasy Client
8 Strategies for Fault Tolerance and Monitoring
8.1 Microservice Failures in a Distributed Architecture
8.2 Network Failures
8.3 Mitigating Against Failures
8.3.1 What is Hystrix?
8.3.2 Circuit Breakers
8.3.5 Request caching
8.3.6 Putting it all together
8.3.7 Hystrix Dashboard
8.4 Adding Hystrix to our Payment microservice
8.4.1 Hystrix with RESTEasy Client
8.4.2 Hystrix with Ribbon Client
9 Securing a Microservice
9.1 Importance of Securing microservice
9.1.1 Why is Security Important?
9.1.2 What does it need to solve?
9.2 Working with Keycloak
9.2.1 Understanding Keycloak’s features
9.2.2 Setting up Keycloak
9.3 Securing Stripe microservice
9.3.1 Configuring Keycloak
9.3.2 Securing the Stripe resource
9.3.3 Authenticating in the Payment resource
9.3.4 Testing your secured microservice
9.4 Capturing user authentication
9.4.1 Configuring Keycloak
9.4.2 Securing category deletion
9.4.3 Authenticating the user in a UI
9.4.4 Testing that the new UI and service all work
10 Architecting a microservice hybrid
10.1 The Cayambe monolith
10.2 Running the Cayambe monolith
10.2.1 Database setup
10.2.2 WildFly setup
10.2.3 Running Cayambe
10.3 Cayambe hybrid—monolith with microservices
10.3.1 Integrating Payment microservice
10.3.2 Integrating Admin microservice
10.3.3 New administration UI
10.3.4 Cayambe hybrid summary
10.4 Deploying everything to a Hybrid Cloud
10.4.4 Cayambe hybrid
10.4.5 Cayambe EAR
10.4.6 Admin UI
11 Data Streaming with Apache Kafka
11.1 What can Apache Kafka do for you?
11.1.1 Data Streaming
11.1.2 Apache Kafka
11.2 Simplifying your monolith architecture with streaming
11.3 Deploying and using Kafka for data streaming
11.3.1 Kafka on OpenShift
11.3.2 Admin microservice
11.3.3 Kafka consumer
11.4 Additional exercises
Appendix A: Spring Boot microservices
Anatomy of a Spring Boot project
Examining a newly initialized Spring Boot project
Testing Spring Boot applications
Configuring application properties
Spring Boot starter dependencies
Using starter dependencies
Specifying facet-based dependencies
Overriding starter transitive dependencies
Developing a Spring Boot application
Focusing on application functionality
Defining the domain
Defining the repository interface
Creating the web interface
Spring Boot testing
Mocking Spring MVC
About the Technology
Large applications are easier to develop and maintain when you build them from small, simple components. Java developers now enjoy a wide range of tools that support microservices application development, including right-sized app servers, open source frameworks, and well-defined patterns. Best of all, you can build microservices applications using your existing Java skills.
About the book
Enterprise Java Microservices teaches you to design and build JVM-based microservices applications. You’ll start by learning how microservices designs compare to traditional Java EE applications. Always practical, author Ken Finnigan introduces big-picture concepts along with the tools and techniques you’ll need to implement them. You’ll discover ecosystem components like Netflix Hystrix for fault tolerance and master the Just enough Application Server (JeAS) approach. To ensure smooth operations, you’ll also examine monitoring, security, testing, and deploying to the cloud.
- The microservices mental model
- Cloud-native development
- Strategies for fault tolerance and monitoring
- Securing your finished applications
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