microlab

Microservice experimentation with Quarkus

General

• Banner customization
• Dev UI -> /q/dev-ui
• Dev services -> https://quarkus.io/guides/dev-services

Quarkus CLI

• Create application

$ quarkus create app xyz.tham:microlab --extension quarkus-rest --no-code

• quarkus update
• quarkus extensions

$ quarkus extension categories
$ quarkus extension list
$ quarkus extension list --installable --category "ai"
(or)
$ quarkus ext list -ic "ai"

• manage extensions

$ quarkus extension add "<artifactid>"
$ quarkus extension remove "<artifactid>"

Micro Profile Standard

Jakarta EE Core Profile

• Jakarta Annotations
• Jakarta CDI (CDI Lite)
• Jakarta Dependency Injection
• Jakarta Interceptors
• Jakarta JSON Processing
• Jakarta JSON Binding
• Jakarta RESTful Web Services

Jakarta RESTful Web Services

REST API

GET / POST / PUT / DELETE

Graph QL API

Query / Mutation / Subscription

gRPC API

x

Config

Manages the application configuration. Refer https://microprofile.io/specifications/config/ for more information

src\main\resources\application.properties

@ConfigProperty(name="<key>")

Configuration profiles

1. prod -> active when application is running in production mode
2. dev -> active when application is running in dev mode
3. test -> active during tests
4. custom -> which can be activated using quarkus.profile configuration property

Configuration profile declaration

#1: Add %<profile>. with the configuration property.

%dev.quarkus.http.port=7777

#2: Add -<profile> with the configuration file

application-dev.properties
application-prod.properties

Overriding configuration properties

Compile time -> Profile specific configuration properties Runtime:

1. System property
2. Environment variables
3. Configuration property file (application.properties)

Environment property should be capitalized and replace the `.` with `_` value
my.greeting -> MY_GREETING
MY_GREETING="Welcome to earth"

System property should be handled with -D argument
-Dgreeting="Welcome to microlab"

Health

x

JWT Authentication

x

Fault Tolerence

x

REST Client

x

Open API

x

Telemetry

x

References

• https://github.com/xstefank/quarkus-in-action