Java 17 and Spring Boot banking platform lab whose twelve-module Maven reactor documents a complete Red-Green-Refactor learning history.
java-17 maven spring-boot tdd microservices +7banking postgresql kafka keycloak testcontainers hexagonal-architecture offline-html
Infrastruktur Hetzner Cloud · Microservices-Stack mit Podman 1 Node bis k3s ca. 20–115 €/Monat Runbook verfügbar Runbook Java 21 modernization lab with an eight-module claims platform plus explicit Java EE, modular-core and Spring Boot migration examples.
java-21 maven spring-boot legacy-modernization websphere +3hexagonal-architecture architecture-tests openshift
Infrastruktur Hetzner Cloud · OKD Single-Node 1 Node CPX52 ca. 100 €/Monat Runbook verfügbar Runbook Executable Java 21 and Spring Boot learning lab for clean code, domain modeling, ports and adapters, idempotency and the outbox pattern.
java-21 maven spring-boot clean-code hexagonal-architecture +2idempotency outbox
Infrastruktur Hetzner Cloud · Podman-Container-Host 1 Node ca. 20 €/Monat Runbook verfügbar Runbook Ausführbares Betriebslernprojekt für WebSphere Liberty, LDAP/LDAPS, Monitoring, Deployment und Hochverfügbarkeit.
java jakarta-ee open-liberty websphere maven +5ldap ldaps podman middleware-operations learning-project
Infrastruktur Hetzner Cloud · Podman-Container-Host 1 Node ca. 20 €/Monat Runbook verfügbar Runbook Java 21 comparison lab implementing one Order-to-Cash reference through Layered Architecture, TDD-first and Domain-Driven Design.
java-21 maven spring-boot layered-architecture tdd +4domain-driven-design architecture-tests testcontainers offline-html
Infrastruktur Hetzner Cloud · Podman-Container-Host 1 Node ca. 20 €/Monat Optionale Laufzeitumgebung Runbook 25-Modul-Kurs zu Enterprise-Java mit Spring Boot 3, Quarkus, DDD/Hexagonal, Kafka, Container-Plattform und sieben branchenspezifischen Implementierungen (OTC, Versicherung, Core-Banking, Healthcare, ERP, Telco, Logistik) - mit echtem Code und PostgreSQL-Testcontainers.
java maven spring-boot enterprise-architecture learning-path +4kafka postgresql quarkus testcontainers
Infrastruktur Hetzner Cloud · Podman-Container-Host 1 Node ca. 20 €/Monat Optionale Laufzeitumgebung Runbook Java 21 hybrid platform lab with Order and Billing services, PostgreSQL, RabbitMQ, observability and OpenShift deployment assets.
java-21 maven spring-boot postgresql rabbitmq +4observability openshift kustomize offline-html
Infrastruktur Hetzner Cloud · Microservices-Stack mit Podman 1 Node bis k3s ca. 20–115 €/Monat Runbook verfügbar Runbook Java 21 and Maven curriculum with 34 executable legacy-to-modern comparison pairs and a detailed migration learning path.
java-21 maven legacy-modernization migration spring-boot +2jakarta-ee testing
Infrastruktur Hetzner Cloud · Podman-Container-Host 1 Node ca. 20 €/Monat Optionale Laufzeitumgebung Runbook Java 17 multi-module lab contrasting a legacy Java EE system with ports and adapters plus Spring Boot, Jakarta EE, Quarkus and deployment targets.
java-17 maven legacy-modernization ports-and-adapters spring-boot +5jakarta-ee quarkus flyway kubernetes openshift
Infrastruktur Hetzner Cloud · OKD Single-Node 1 Node CPX52 ca. 100 €/Monat Runbook verfügbar Runbook Java 17 lab comparing a WebSphere-style order-and-billing legacy baseline with modular application, adapter, migration-test and OpenShift examples.
java-17 maven legacy-modernization websphere soap +3outbox idempotency openshift
Infrastruktur Hetzner Cloud · OKD Single-Node 1 Node CPX52 ca. 100 €/Monat Runbook verfügbar Runbook Java-21- und Angular-22-Lernplattform für eine Enterprise-Bibliotheksverwaltung mit Microservices, Messaging, Security, Observability und Kubernetes-Deployment.
java-21 maven spring-boot spring-cloud angular +17ngrx microservices ddd postgresql kafka rabbitmq redis keycloak testcontainers pact archunit observability kubernetes helm openshift jenkins offline-html
Infrastruktur Hetzner Cloud · Library Enterprise auf k3s 1 Node oder HA-Cluster ca. 70–220 €/Monat Runbook verfügbar Runbook Ausführbares Vergleichs- und Migrationslabor von Java-EE/WebSphere zu Spring Boot, Kafka, React und OpenShift.
java java-ee legacy-modernization maven spring-boot +6kafka react openshift insurance learning-project websphere
Infrastruktur Hetzner Cloud · OKD Single-Node 1 Node CPX52 ca. 100 €/Monat Runbook verfügbar Runbook Executable six-module Java learning lab covering Java 11 APIs, Java 17 domain modeling, Java 21 concurrency, Spring Boot and Jakarta EE.
java-21 maven spring-boot jakarta-ee virtual-threads +2domain-modeling java-17
Infrastruktur Hetzner Cloud · Podman-Container-Host 1 Node ca. 20 €/Monat Optionale Laufzeitumgebung Runbook