Docker – Carsten Spräner https://www.spraener.de Innovationen für Ihren Erfolg Wed, 27 Aug 2025 08:25:25 +0000 de hourly 1 https://wordpress.org/?v=6.8.2 https://www.spraener.de/wp-content/uploads/2023/12/CS-Icon-gruen.png Docker – Carsten Spräner https://www.spraener.de 32 32 10/2023 – Today: Transportation (Rails) https://www.spraener.de/2023/12/11/10-2023-today-transportation-rails/ Mon, 11 Dec 2023 08:09:08 +0000 https://www.spraener.de/?p=2672 Modernization of a productive application to current software components. An existing internal application will be converted to modern and currently secure components as part of the contract.Struts-1, Spring 3, Hibernate 3, and similar outdated systems will be replaced. Stability in production had to be guaranteed under all circumstances for the changeover duration. Details Activities Conception, […]

Der Beitrag 10/2023 – Today: Transportation (Rails) erschien zuerst auf Carsten Spräner.

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Modernization of a productive application to current software components.

An existing internal application will be converted to modern and currently secure components as part of the contract.
Struts-1, Spring 3, Hibernate 3, and similar outdated systems will be replaced. Stability in production had to be guaranteed under all circumstances for the changeover duration.

Details

  • Integrating AWS Secret Manager
  • Creation and implementation of JUnit tests
  • Provide a new implementation of jmockit to run with Java-21
  • Design and implement the infrastructure for automatic integration tests with selenium
  • Replacing outdated APIs with new versions
  • Conversion of the built environment to Docker / docker-compose 
  • General maintenance and care
  • Guaranteeing production stability

Activities

Conception, implementation, and testing of the newly implemented functions with comparative JUnit tests. Converted the backend from Hibernate Criteria API to JPA Builder API and identified software problems during the conversion. Creation of a set of web tests for automatic quality assurance of new versions with HtmlUnit. Introduction of Docker as built and production environment.

IT-Technologies

AWS, Selenium Web Test, Spring 6, Hibernate 5, Docker, docker-compose, Angular, Struts-1 (web-legacy), JUnit, Mockito, JBoss-8, JDK-21, Jenkins

Let’s Talk About Your Project

Just send me a message!

Contact Me

Der Beitrag 10/2023 – Today: Transportation (Rails) erschien zuerst auf Carsten Spräner.

]]> 04/2022 – 10/2023: Department of Justice https://www.spraener.de/2023/10/31/04-2022-10-2023-department-of-justice/ Tue, 31 Oct 2023 18:04:40 +0000 https://www.spraener.de/?p=2632 Implementing the backend of a lawsuit management software. The German Department of Justice initiated the project and aims to implement nationwide software to manage lawsuits. My task was to design, implement, and test the backend part of this system. Details Activities Design and developing µService endpoints with Spring Boot in consultation with the frontend team. […]

Der Beitrag 04/2022 – 10/2023: Department of Justice erschien zuerst auf Carsten Spräner.

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Implementing the backend of a lawsuit management software.

The German Department of Justice initiated the project and aims to implement nationwide software to manage lawsuits. My task was to design, implement, and test the backend part of this system.

Details

  • Developing with IntelliJ and Java-17
  • API-Specification with openAPI and implement the backend with Spring Boot
  • Running with Spring Boot
  • Organized with Jira and GitHub
  • Build with maven and Jenkins pipeline  

Activities

Design and developing µService endpoints with Spring Boot in consultation with the frontend team. Test the endpoints with JUnit to get a test coverage above 90%. Describing backend integration tests with IntelliJ HTTP-component.

IT-Technologies

µServices, Spring Boot 2, Java 17, Groovy, Docker, Docker-Compose, Swagger, Lombok, MapStruct, JBoss, J2EE, MySQL/MariaDB, JUnit, Mockito, maven, GIT, Lucene 3.8 / 9.2.0, IntelliJ, Eclipse, Jira, Confluence, GitLab, Jenkins, RedMine

Let’s Talk About Your Project

Just send me a message!

Contact Me

Der Beitrag 04/2022 – 10/2023: Department of Justice erschien zuerst auf Carsten Spräner.

]]> 06/2023: IT Service Industry https://www.spraener.de/2023/06/30/keycloak_saml-provider/ Fri, 30 Jun 2023 15:23:00 +0000 https://www.spraener.de/?p=2808 KeyCloak as SAML-Provider for a Spring-Boot Application. In preparation for a workshop, a Spring-Boot application was created with KeyCloak as the identity provider. A user can log into the application via SAML or a Magic Link. The Magic Link is sent to the user by mail. Details Activities Implementation of the entire prototype. Creation of […]

Der Beitrag 06/2023: IT Service Industry erschien zuerst auf Carsten Spräner.

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KeyCloak as SAML-Provider for a Spring-Boot Application.

In preparation for a workshop, a Spring-Boot application was created with KeyCloak as the identity provider. A user can log into the application via SAML or a Magic Link. The Magic Link is sent to the user by mail.

Details

  • Implementing a Spring-Boot application with public and protected areas and using the SAML protocol
  • Implementation of a KeyCloak plugin for Magic Link creation
  • Connection of the application to a KeyCloak instance
  • Configuration of KeyCloak as SAML provider and creation of a realm for the prototype
  • Creation of Magic Links for direct login into the protected area
  • Creation of multi-layer Dockerfiles for easy operation on any Docker-enabled system
  • Deployment of the whole system via docker-compose, including database, KeyCloak, Spring boot application

Activities

Implementation of the entire prototype. Creation of Dockerfiles to build and run the systems. Deployment of the entire system via docker-compose. Availability via GitHub.

IT-Technologies

Java 17, Spring-Boot 3, KeyCloak, Docker, docker-compose, SAML, OIDC, MagicLink

Let’s Talk About Your Project

Just send me a message!

Contact Me

Der Beitrag 06/2023: IT Service Industry erschien zuerst auf Carsten Spräner.

]]> 10/2014 – 02/2022: E-Commerce https://www.spraener.de/2022/02/28/backend-application_ebay/ Mon, 28 Feb 2022 12:28:00 +0000 http://www.spraener.de/?p=328 Backend-Application for eBay-Dealers (Book market). The project creates and maintains a platform for eBay dealers. It simplifies the creation of new offers and tracks the stock with the offers on eBay. It integrates data from eBay, book databases, and distributors. The system was built with Vaadin on a GlassFish container. Later, it was migrated to […]

Der Beitrag 10/2014 – 02/2022: E-Commerce erschien zuerst auf Carsten Spräner.

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Backend-Application for eBay-Dealers (Book market).

The project creates and maintains a platform for eBay dealers. It simplifies the creation of new offers and tracks the stock with the offers on eBay. It integrates data from eBay, book databases, and distributors.

The system was built with Vaadin on a GlassFish container. Later, it was migrated to Spring 2 with microservices running in docker containers.

The project uses SCRUM Methods like backlog, sprints, and DevOps.

Details

  • Importing stock data from the distributor
  • Generating HTML pages and images for the eBay offer
  • Template-driven creation and activation of offers on the eBay platform
  • Reading orders from eBay and synchronizing the stock and affected offers
  • Creating invoices and customer emails
  • Implementing business processes with BPMN (Camunda)

Activities

Create the architecture, Design the application, Maintaining the SCRUM-Backlogs, implementing requirements in a SCRUM-Sprint, Operating and maintaining the application.

IT-Technologies

Vaadin 7, Angular 4+, Java, REST (Jersey), eBay-API (Java), Camunda, Chrome-Extension-API, J2EE-7, Linux OS (SuSE), Jenkins, Gradle, MagicDraw, Docker, Docker-Compose, GIT

Let’s Talk About Your Project

Just send me a message!

Contact Me

Der Beitrag 10/2014 – 02/2022: E-Commerce erschien zuerst auf Carsten Spräner.

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