Spring Boot Microservices and Spring Cloud. Build & Deploy.

Install the Java development kit from Oracle, download Java Standard Edition, confirm the version, and set JAVA_HOME on Mac OS for use with Spring Tool Suite or NetBeans.

Download and install Sprint tools for Eclipse to build and debug Spring microservices, using the sprint tools download page and install via macOS DMG.

Start building a restful web service with Spring Boot in this quick-start section, and decide whether to skip by assessing your knowledge of basic web services and Spring Cloud.

Build a Spring Boot REST API with get, post, put, and delete methods bound to mappings to manage user details via CRUD operations, returning placeholder strings before JSON payload integration.

Run a Spring Boot web service by configuring and launching the app, then verify CRUD endpoints via HTTP methods (GET, POST, PUT, DELETE) in Postman on port 8080.

Learn to read a user ID from the URL path using the @PathVariable annotation in a /users/{id} endpoint, bind the path value to a method parameter, and test with Postman.

Learn how to read and use query string parameters in Spring Boot microservices, implementing page and limit for paginated /users responses with @RequestParam, and handling required vs optional parameters.

Create a user rest object with first name, last name, email, and user id, and return it as JSON (or XML) from the get user details API.

Learn how to configure a Spring Boot REST endpoint to return user details in XML or JSON by using Accept headers and multiple media types, enabling XML support with Jackson.

Learn to handle http post requests and read json or xml payloads by binding the request body to a Java model with @RequestBody.

Store user records temporarily in an in-memory Java map and manage post, get, and delete mappings in a Spring Boot app, returning JSON or XML.

Learn to catch multiple exceptions with one method in a spring boot controller advice by listing exception classes in the handler annotation and testing with debugging and postman.

Learn to implement dependency injection in a Spring Boot REST app by creating a user service interface and implementation. Autowire into the controller to enable independent testing with mocks.

Learn constructor based dependency injection in Spring by injecting a utility class into a user service, using the @Autowired and @Service annotations, with Spring auto-wiring components at runtime.

Start building a users microservice that handles registration and login, plus get, update, and delete user details, registers with a Eureka server, and can be tested via Postman.

Create a new Spring Boot users microservice to manage user details via a web API and act as a Netflix Eureka client, connecting to a Eureka discovery server.

Create a new rest controller in the user's microservice presentation layer to expose a /users/status endpoint via @RestController, @RequestMapping, and @GetMapping that returns 'working'.

Learn to set up a paired microservices architecture with a new account management service and a users service, register them with Eureka, and prepare for API gateway integration.

Register the account management microservice with the Eureka discovery server and verify its status at /account/status/check; then register the users microservice and confirm both are running.

Run the Eureka discovery server and microservices, then use the Zul API gateway as a single entry point to access the users web service and account web service.

Start multiple instances of the users microservice with a discovery server and Eureka, assigning unique instance ids and ports either randomly or via command line arguments using application properties.

Note that Zul API gateway is in maintenance mode and introduces Spring Cloud API gateway to route http requests to microservices, with migration guidance and config server setup.

Learn how Spring Cloud Gateway routes http requests to microservices via Eureka Discovery Service, with built-in and custom filters, including jwt validation for secure routing.

Enable discovery locator in spring cloud gateway to auto map http requests to Eureka-registered microservices using the service name, then adjust with lowercase service id settings for URL routing.

Start multiple instances of the users microservice with a discovery server, assign unique instance IDs, and verify each registration on the Eureka dashboard.

Start multiple instances of users microservice and verify spring cloud api gateway load balances requests among them. Use an environment object to read instance ports and observe routing via Eureka.