Let’s Code – Spring Boot Live Coding auf YouTube

Behavior-Driven Development mit JUnit 5

Behavior-Driven Development (BDD) ist ein Ansatz in der Softwareentwicklung, der den Fokus auf das Verhalten eines Systems setzt. Dies wird durch eine entsprechende Strukturierung von Testfällen unterstützt. Häufig kommt dabei der Dreiklang aus Given...

• BDD
• Agile Methoden
• Java
• Testing

17.9.2018 | 3 Minuten Lesezeit

Bessere JUnit-5-Tests mit @Nested

Mit JUnit 5 erhalten wir die aus anderen Test-Frameworks bekannte Möglichkeit, Tests zu verschachteln. Damit lassen sich Tests viel übersichtlicher gestalten und besser strukturieren. In diesem Blogpost zeige ich an einem Beispiel, wie das aussehen kann...

• Java
• Testing

5.9.2018 | 4 Minuten Lesezeit

Alt trifft neu: JUnit 4 & 5 in einem Projekt

JUnit ist das am weitesten verbreitete Framework für automatisierte Tests in Java. Seit einiger Zeit steht die Version 5 in den Startlöchern. Da diese weitreichende Veränderungen mit sich bringt, gibt es in vielen Projekten Hemmungen, auf den neuen...

• Java
• CI/CD
• Testing

3.9.2018 | 2 Minuten Lesezeit

Localization of Spring Security Error Messages in Spring Boot

Spring Security is a framework for easily adding state-of-the-art authentication and authorization to Spring applications. When used in conjuction with Spring Boot, adding basic authentication to a web application is straightforward. Although Spring ...

• Java

24.8.2017 | 5 Minuten Lesezeit

Parsing of LocalDate query parameters in Spring Boot

Spring Boot is a framework that follows the convention over configuration principle. Whenever a convention does not do the right thing for you, it is usually easily possible to configure the desired behavior. As I have discovered lately, there is currently...

• Java
• Software development
• Search
• API
• Spring

6.8.2017 | 4 Minuten Lesezeit

Akka Best Practices: Defining Actor Props

Akka provides an implementation of the actor model for building reactive applications . So in Akka, an application is made up of actors rather than of plain old objects. When creating actors, we need to pass Props instances. So in this blog post I’...

• Reactive Programming
• Scala

10.3.2017 | 4 Minuten Lesezeit

How I Caused Confusion about Spring Boot

A few weeks ago, I published a blog post about how Spring Boot binds configuration values to JavaBeans . Shortly after this post has been published, Stéphane Nicoll reached out to me. We discussed my findings and came to the conclusion that my blog ...

• Spring

30.6.2016 | 2 Minuten Lesezeit

Konfiguration an JavaBeans binden – mit Spring Boot

Mit Spring ist es einfach, Konfigurationswerte auszulesen und Variablen zuzuweisen. Die @Value -Annotation gib es schon eine Weile im Spring Framework. Durch die Einführung von @ConfigurationProperties in Spring Boot ist eine weitere Möglichkeit hinzugekommen...

• Spring

6.4.2016 | 6 Minuten Lesezeit

Apache Software Foundation: Behind the Scenes

Ever thought about getting involved in an open source community? The Apache Software Foundation (ASF) is one of the places to do so. But what’s in for you? We talked to someone who should know: Benedikt Ritter is involved in the ASF and answered our ...

• Open Source

30.3.2016 | 11 Minuten Lesezeit

Testing S2I Images

Source-to-Image (S2I) is part of the OpenShift tool chain. It is built on Docker and abstracts how applications are built and run in OpenShift. For this, S2I images contain some logic in the form of shell scripts. To make sure that an S2I image works...

• CI/CD
• Cloud
• Container

28.3.2016 | 6 Minuten Lesezeit

How to deploy Spring Boot applications to OpenShift

Spring Boot is a framework which helps to get applications up and running as quickly as possible. OpenShift is a Platform as a Service (PaaS) product which makes it easy for developers to deploy applications. Putting both together feels like the natural...

• CI/CD
• Cloud
• Container

23.3.2016 | 3 Minuten Lesezeit

Continuous Delivery on Steroids: Einführung in Heroku Pipelines

Heroku ist ein Platform as a Service (PaaS) Anbieter. Mit Heroku Pipelines stellt Heroku seit kurzem die Möglichkeit bereit, schnell und einfach eine Continuous Delivery Pipeline aufzubauen. Deshalb ist das Thema vor allen Dingen für Entwickler interessant...

• Cloud

9.3.2016 | 6 Minuten Lesezeit

How to add a GitHub commit link to a Spring Boot application

A while back, I wrote about how to deploy a Spring Boot application to Heroku . Since I have automatic deployment from master branch activated for the application at Heroku , I want to be able to see right away from which commit the running application...

• CI/CD
• GitHub
• Spring

4.1.2016 | 7 Minuten Lesezeit

Comment on the so-called security vulnerability in Apache Commons Collections

There has been some fuss about a security vulnerability in the well known Apache Commons Collections library. It was initially described in the talk “Marshalling Pickles – how deserializing objects will ruin your day” at AppSecCali2015 by Gabriel Lawrence...

• Java
• IT-Security

17.11.2015 | 4 Minuten Lesezeit

Deploying Spring Boot applications to Heroku

Spring Boot is the talk of the town when it comes to microservice architectures. But implementing a service is just one part of the story. To truly leverage the power of a microservice architecture, organizations have to embrace the DevOps mindset to...

• CI/CD
• Java
• Microservices
• Spring

7.10.2015 | 4 Minuten Lesezeit

Extreme startup at codecentric

Jeder Entwickler hat seine Lieblingssprache oder sein Lieblingsframework und eine Menge hitziger Diskussion werden deshalb ausgetragen. Darum entschieden wir uns vor ein paar Wochen, dass es an der Zeit ist herauszufinden, welcher der beste/schnellste...

• Reactive Programming
• Open Source
• Functional programming
• Startup
• JavaScript
• Java
• Scala
• Spring

24.6.2015 | 7 Minuten Lesezeit

Accessing maven project properties from Jenkins build jobs

Sometimes it is useful to have access to maven project properties like project.artifactId or project.version in a Jenkins job. For example you could calculate the next version number to set in a release job. Another use case I had in one of my projects...

• CI/CD
• Software development

8.7.2014 | 2 Minuten Lesezeit

JBehave JUnit Runner release 1.1.2 and future development

The JBehave JUnit Runner is one of codecentric’s open source projects. It provides an easy way to execute JBehave stories using a custom JUnit runner. On friday, 27th of July, we published a bugfix release (v1.1.2) and we’re already planning the next...

• Java

28.6.2014 | 2 Minuten Lesezeit

Polymorphism in object oriented systems

I recently had a quite interesting discussion at the office. I was sitting together with some colleagues learning the Go programming language, when we started to discuss about the term “polymorphism”. It was very fascinating to see that we had at least...

• Java
• JavaScript
• Software development

20.2.2014 | 5 Minuten Lesezeit

Scrum Guide 2020 – Die wichtigsten Änderungen

Jetzt Andreas Scrum-Trainings auf scrum.org buchen Der aktuelle Scrum Guide 2020 ist der Kern von Scrum. Was hier nicht drin steht, ist kein Scrum. In regelmäßigen Abständen wird der Scrum Guide von Ken und Jeff höchstpersönlich an neue Erkenntnisse...

• Agilität
• Produktmanagement
• Agile Methoden

18.11.2020 | 7 Minuten Lesezeit

The Product Menu – A New Way to Organize Your Product Backlog

For over a year, I am now proud Product Owner of CenterDevice . And all this time I felt bad about myself, how I managed to keep my product backlog in shape. Or rather, how I failed in doing so. Three weeks ago I decided, that it’s not me to blame, but...

• Agile
• Product management
• Agile methods

10.2.2015 | 6 Minuten Lesezeit

JBehave Configuration Tutorial

I love JBehave. It’s a great test automation framework that takes full advantage of all the possibilities of the JVM and the plethora of libraries that are available for Java. JBehave makes the transition from natural language style BDD-tests to Java...

• Testing
• Agile
• BDD
• Agile methods
• Java

15.6.2012 | 8 Minuten Lesezeit

Pros and Cons of the LCOM4 metric in Sonar

In our projects, we use sonar to detect quality flaws in our sources as early as possible. An important metric is LCOM4: Lack of Cohesion of Methods IV. It measures how related the fields and methods in a class are. If everything is related within a ...

• Software development

27.3.2012 | 3 Minuten Lesezeit

Codecentric Eurovision Song Contest

Tomorrow, Düsseldorf will host the Eurovision Song Contest and there is literally no way of escaping that topic here. I think it is a great opportunity in Europe to get to know your neighbour countries better and have a lot of fun together. codecentric...

12.5.2011 | 1 Minuten Lesezeit

Professional Scrum Developer Training – ein erster Erfahrungsbericht

In Zusammenarbeit mit scrum.org entwickelt codecentric das Professional Scrum Developer Training auf dem Java Technologie-Stack. Dabei kommt uns unsere langjährige Projektexpertise zu Gute. Das was wir in der Agile Software Factory in den letzen Jahren...

• Agilität
• Java
• CI/CD
• Testing
• Agile Methoden
• Softwareentwicklung
• Test Driven Development

27.4.2011 | 4 Minuten Lesezeit

Einsatz von JIRA in agilen Projekten

Am 11. Oktober 2010 habe ich den Vortrag „Agile Projekte mit JIRA und Greenhopper“ auf der gearconf in Düsseldorf gehalten. Leider ist es dort unerwartet zu technischen Problemen gekommen. Deshalb hatte ich dort versprochen, den geplanten Inhalt als ...

• Atlassian
• Agile Methoden

24.10.2010 | 1 Minuten Lesezeit

Debugging XPath and CSS locators with Selenium IDE

On the robotframework-users mailing list was a question about how radio buttons can be properly handled with the SeleniumLibrary . There was apparently a problem somewhere in the generated xpath expression, and the user found it difficult to debug where...

• Testing

27.7.2010 | 1 Minuten Lesezeit

Who Is Late For Daily Scrum?

The Daily Scrum just takes fiveteen minutes and is the central tool for every agile team, to coordinate and structure the day. You should expect that every minute counts and everybody values the meeting with the priority and usefullness it deserves. ...

• Agile methods

27.7.2010 | 6 Minuten Lesezeit

How to Structure a Scalable And Maintainable Acceptance Test Suite

Robot Framework Tutorial Part I: Robot Framework Tutorial – Overview Part II: Robot Framework – A complete example Part III: Robot Framework IDE Part IV: How to Structure a Scalable And Maintainable Acceptance Test Suite Part V: Robot Framework...

• Agile
• Software architecture
• Testing
• Software development

19.7.2010 | 7 Minuten Lesezeit

File Downloads With Selenium — Mission Impossible?

When starting to automate acceptance tests that include a web UI, you probably will hit a wall quite quickly: how to verify a document that is available for download against some criteria? If you tried that one you know: doing file downloads automatically...

• Testing

8.7.2010 | 5 Minuten Lesezeit

Wrap-Up meettheexperts Agile 2010

Two weeks ago, the first meettheexperts@codecentric took place this year. After successfull events last year, we can conclude not without pride, that again the participants were very happy with the day. Before I drift off into more details about the ...

• Agile
• Community

30.6.2010 | 4 Minuten Lesezeit

Schon diesen Freitag: Agile Experten zum greifen nah

Letztes Jahr hat codecentrics Minikonferenz einschlagenden Erfolg gehabt. Das Feedback der Teilnehmer war durchweg positiv, besonders hervorgehoben wurde die Möglichkeit mit den Experten tatsächlich direkt in Kontakt treten zu können und auch Zeit und...

• Agilität
• Community
• Agile Methoden
• Test Driven Development

13.6.2010 | 2 Minuten Lesezeit

Survey Result on Usage of TDD

Last week I conducted a little survey. The results I now would like to present and discuss here. In total 17 people shared their opinion. Thank you for taking the time. Of course this cannot lead to statistically sound statements, but we can show tendendcies...

• Agile methods
• Software development
• Test Driven Development

26.5.2010 | 5 Minuten Lesezeit

Usage of TDD in practice

How much is TDD used in daily business? How much should it be used? To find that out, I started a little survey. The results will be made public on this blog soon. I’d love to get as much participation as possible, of course 🙂 So please continue reading...

• Test Driven Development

20.5.2010 | 1 Minuten Lesezeit

Kleine Grammatik zum Schreiben von ausführbaren Spezifikationen auf Deutsch

Vor einigen Tagen hatte ich schon beschrieben, dass es mit dem Robot Framework grundsätzlich möglich ist, die ausführbare Spezifikationen auch auf Deutsch zu schreiben . Im Gegensatz zum Englischen, gibt es im Deutschen aber ein paar Details zu beachten...

• BDD
• Agilität
• Testing

16.5.2010 | 3 Minuten Lesezeit

Localizing Your Acceptance Tests With The Robot Framework

When doing acceptance test driven development, the team writes the tests often by first specifying the behaviour, and then supporting that with a table of examples. How that generally works with the Robot Framework, was already described earlier . As...

• Agile
• BDD
• Testing

6.4.2010 | 1 Minuten Lesezeit

Top 10 der Aprilscherze 2010

Hier ist unsere Liste der besten Aprilscherze 2010: Platz 10: Google / Schufa – Beim Ego-Googlen kann man jetzt direkt seine Schufa-Einstufung ermitteln. Platz 9: NetBeans – Ähnlich Photoshops neuem Feature, gibt es ein „content aware fill“ im aktuelle...

31.3.2010 | 1 Minuten Lesezeit

Robot Framework Acceptance Tests: Develop With Eclipse, Run With Maven

The Robot Framework is a very versatile tool and never confronted us with unsolvable problems so far. In some regards it still feels a little rough and needs some polishing, to make development and maintenance of automated tests more efficient. One ...

• Agile
• BDD
• Framework
• Java
• CI/CD
• Testing

5.3.2010 | 4 Minuten Lesezeit

Taking Remote Screenshots With Selenium And The Robot Framework

.Screenshot are incredibely helpful when doing user interface tests, to get fast feedback why a test has failed. Selenium provides several great opportunities to do exactly that. But, there are many problems related to that at the moment, from which ...

• Java
• Testing

10.2.2010 | 8 Minuten Lesezeit

Given/When/Then And Example Tables Using the Robot Framework

When doing ATDD (Acceptance Test Driven Development) or BDD (Behaviour Driven Development), the following grammar is widely spread to formulate pre- and postconditions of a test: Given: The static preconditionsWhen: The behaviour under test (or that,...

• Agile
• Java
• Testing

16.11.2009 | 5 Minuten Lesezeit

Agile Testing Days – Automated Integration Testing in Agile Environments

… by Slobodanka Sersik and Dr. Gerald Schröder The context of this session is a container management system, which is rather big, speaking about 200 person years effort. The model that was used in order to create the test cases included scenarios, steps...

• Framework
• Open Source
• Testing
• Spring

13.10.2009 | 1 Minuten Lesezeit

Agile Testing Days – Keynote from Stuart Reid – Investing in individuals...

The keynote starts with our dear agile chicken & pigs story. Pigs are the ones who are fully commited to the projects, all other stakeholders are chickens. Judged from the agenda, this session will be much about required skills and motivation. That sounds...

• Agile
• Agile transformation
• Database
• Testing
• Community
• Programming language
• Software development
• Agile methods
• Java

13.10.2009 | 5 Minuten Lesezeit

Agile Testing Days Berlin – Improved Agile Testing using TPI by Cecile...

So, this session is apparently about TPI, and the acronym was now already mentioned a few times, and maybe I should now it, but I don’t. So in contrast to yesterday, where I was expecting everybody to know what BDD is, now I am the one who does not know...

• Agile
• BDD
• Community
• Frontend

13.10.2009 | 5 Minuten Lesezeit

Agile Testing Days Berlin – Promoting the use of a quality standard mit...

Dieser Eintrag muss noch übersetzt werden, bis dahin ist er leider nur auf englisch verfügbar.

• APM
• Frontend
• Agile Methoden

13.10.2009 | 1 Minuten Lesezeit

Agile Testing Days Berlin, The First Day

The first of the agile testing days has passed. Weeks ago I classified the conference as minor and german. But when I learned at Agile 2009 in Chicago that many people are coming, I suspected that it is going to be bigger and more international than ...

• Agile transformation
• Agile
• Framework
• Community
• Frontend
• Testing
• Agile methods
• Agile

11.10.2009 | 6 Minuten Lesezeit

Retrospective: meet the experts – agility

Ten days ago, our second “meet the experts” took place. I would like to take the opportunity and have a little retrospective here.abzuhalten. Phase 1: Setting the Stage Thoughtprovoking. Phase 2: Gathering Data At first, here is an analysis of the statistical...

• Agile
• Software architecture
• Agile transformation
• CI/CD
• Community
• Frontend
• Agile methods
• Agile

14.9.2009 | 5 Minuten Lesezeit

Jira Portlets für Hudson Build Status und Statistiken, Version 1.0 released

Vor einigen Monaten gab es bei uns ein Shootout der CI-Server. Im wesentlichen Atlassian Bamboo gegen Hudson. Wir haben uns zwei Monate dafür Zeit genommen und Hudson hat am Ende knapp die Nase vorn gehabt. Ein Feature von Bamboo, was uns sehr gefallen...

• CI/CD
• Java
• Open Source
• Atlassian

3.9.2009 | 1 Minuten Lesezeit

Melting Icebergs, Devil Ducks and Epics – Agile 2009, Day 2

Was yesterday really only the second day of Agile 2009? Then I have to hurry to write down my impressions, before the next day will have been started. Keynote, by Alistair Cockburn Dr. Alistair Cockburn not just entered the stage, he marched in, accompanied...

• Agile
• CI/CD
• Community
• Project management
• Frontend
• Search
• Agile methods

25.8.2009 | 6 Minuten Lesezeit

Masti, Co-Creator, Pair vs. Review, Agile Games – Agile 2009, Day 1

Wow, the weekend and also the first day in Chicago are gone. Even before the conference started, I had the opportunity to meet many people whom I only knew from books and blogs. On Saturday night, shortly after arriving at the hotel, I met Scott Duncan...

• Agile
• Java
• Community
• Agile methods
• Frontend
• Webdevelopment
• Agile

24.8.2009 | 7 Minuten Lesezeit

International iCalendar File Processing, It’s Groovy

Tonight, I wanted to plan my schedule for the forthcoming Agile 2009 conference in Chicago. I very much look forward to the conference and can hardly make up my mind, which sessions I want to see – because there will be so many I will miss. Planning ...

• Agile
• Groovy
• Java
• Community
• Search
• Frontend
• Agile methods
• Webdevelopment
• Agile

18.8.2009 | 3 Minuten Lesezeit

Kommentar zum 2. Java-Trendbarometer der expeso GmbH

Die expeso GmbH hat das zweite Java-Trendbarometer veröffentlicht. Die Ergebnisse lassen sich nach einer Registrierung in Gänze einsehen. In Auszügen sind die Ergebnisse auch auf heise online verfügbar: So empfinden 75 Prozent der Teilnehmer die Bedeutung...

• Networking
• CI/CD
• Java
• Community
• Weiterbildung
• Agile Methoden

28.7.2009 | 4 Minuten Lesezeit

Meet The Experts – Agility on September, 4th

The first Meet the Experts – Performance took place in June and was a day to remember for all participants and organizers: new contacts were made, new insights and knowledge was gained, interesting discussions were happening – also food, drinks and ...

• Agile transformation
• Controlling
• Data
• Agile
• Java
• Community
• APM
• Frontend
• Training
• Software architecture
• Agile methods
• Webdevelopment

23.7.2009 | 4 Minuten Lesezeit

Multiple Selects mit Spring MVC

Während unserer coding night, zu der mit Sicherheit noch ein separater Blogeintrag folgt, setzen wir voll auf Spring Technologien. Dabei hat sich eine vermutlich simple Anforderung als ziemlich halsbrecherisch herausgestellt. Wie kann man mit Spring ...

• Framework
• Java
• Frontend
• Spring
• Validierung
• Webdevelopment

10.7.2009 | 4 Minuten Lesezeit

codecentric takes leading role in the Java Community Process

Since the middle of this year, codecentric is contributing member of the Java Community Process in order to pass the company’s expertise on into the process for defining the extension to Java. From today on, codecentric also takes a leading role and...

• Framework
• Java

19.12.2008 | 1 Minuten Lesezeit

Progress presents Actional and DataXtend SI at our “Fridaymeeting”

On the last Friday of every month codecentric hosts its “Fridaymeeting”. It’s a good opportunity to spend time from everybodys 20%-time contingent for professional development and discuss news in technology, products or other interesting topics. Every...

• Data
• Community
• Framework
• Java
• APM
• Frontend
• Software architecture
• Validation
• Webdevelopment

2.9.2008 | 4 Minuten Lesezeit

Slides for the Scrum talk at JUG Cologne

A pleasant Experience, my first JUG meeting. It was not only well organized, but the room was crowded! The GWT talk (slides ) was a little bit jumpy, but full of background information and stories. The slides for my talk about Scrum for JSR 264 are now...

• Community
• Frontend
• Agile methods

21.8.2008 | 1 Minuten Lesezeit

Codecentric Presents Scrum for Virtual Teams at JUG Cologne

The JUG Cologne invited me to one of their regular meetings. On August, 11th I will present the experiences I made as Spec-Lead for Java Specification Request 264, which is the Order Management API , when introducing Scrum to the expert group. After...

• Java
• Community
• Agile methods
• Webdevelopment

22.7.2008 | 1 Minuten Lesezeit