Study03 README Contents

Topics: SpringBoot ● Spring WebFlux ● Reactive Streams ● Reactive REST ● Redis ● Docker ● WebTestClient

Research the Reactive REST Web Service

On the server-side WebFlux supports two distinct programming models:

• Functional Endpoints
• Annotated Controllers

The project Study03 implements one ot them, the "Functional Endpoints" programming model.

The flowchart with Docker containers 'study03' and 'redis'.

The Redis is the in-memory data structure store.
The screenshots from the RedisInsight (Redis data visualizer and optimizer).

The sections of this project:

1. Docker Build
2. Web Browser Client
3. Java Client
4. Curl Client

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Java source code. Packages:

application sources :  kp
test sources :  kp

The domain objects class diagram.

Java API Documentation ●  Java Test API Documentation

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❶ Docker Build

Action:

1. With batch file "01 Docker build and run.bat" build the image and
start the container with the SpringBoot server.

1.1. Docker image is built using these files: Dockerfile and compose.yaml.

The screenshot of the created Docker containers.

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❷ Web Browser Client

Action:

1. With the URL http://localhost:8280 open in the web browser the home page.
2. On this home page select 'Load sample dataset' http://localhost:8280/loadSampleDataset.

2.1. The home page on the Docker link: http://localhost:8280.

The screenshot of the home page.

Below are presented the results from some selected links on the home page.

2.2. The 'Get all departments' link: http://localhost:8280/company/departments.

The handler method: kp.company.handlers.DepartmentHandler::handleDepartments.

The result from the 'Get all departments'.

2.3. The 'Get the department by department key' link: http://localhost:8280/company/departments/K-DEP-1.

The handler method: kp.company.handlers.DepartmentHandler::handleDepartmentByDepartmentKey.

The result from the 'Get the department by department key'.

2.4. The 'Get the employee by department key and employee names' link: http://localhost:8280/company/departments/K-DEP-1/employees/?firstName=EF-Name-101&lastName=EL-Name-101.

The handler method: kp.company.handlers.EmployeeHandler::handleEmployeeByDepartmentKeyAndNames.

The result from the 'Get the employee by department key and employee names'.

2.5. The 'Get all teams and scores' link: http://localhost:8280/company/teams.

The handler method: kp.company.handlers.TeamHandler::handleTeams.

The result from the 'Get all teams and scores'.

2.6. The 'Get the teams and scores by ranges' link: http://localhost:8280/company/teams/range?rangeFrom=1&rangeTo=3.

The handler method: kp.company.handlers.TeamHandler::handleTeamsRangeByScore.

The result from the 'Get the teams and scores by ranges'.

2.7. The 'Get the team rank by team id' link: http://localhost:8280/company/teams/rank?id=1.

The handler method: kp.company.handlers.TeamHandler::handleTeamRankById.

The result from the 'Get the team rank by team id'.

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❸ Java Client

Action:

1. With batch file "03 MVN clean install execute client.bat" launch the Java client.

3.1. The client application kp.client.WebClientLauncher.
The method kp.client.WebClientLauncher::performRequests starts three subscribers:
DepartmentSubscriber, EmployeeSubscriber, TeamSubscriber.

The screenshot of the console log from the run of the batch file "03 MVN clean install execute client.bat"

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❹ Curl Client

Action:

1. With batch file "04 CURL call server.bat" load the sample dataset and get departments and employees.

4.1. The screenshot of the console log from the run of the batch file "04 CURL call server.bat"

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