All those architectures out there start as a simple consistent idea… and end in a mess. After too many change requests and refactoring tasks to improve your project or correct issues, there might be nothing much left of the architecture you once started with. In this post I will give an example on how to…
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The first release candidate for Vaadin 10 has been unleashed and I have just started to migrate some of my Vaadin 7/8 projects to version 10. As I prefer a server side programming model for Vaadin projects, I did not have many problems with the server side. The client components as well as the layout and styles…
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Vaadin 10 is an almost complete rewrite of the successfull Vaadin framework and offers many new interesting and usefull features. One interesting feature is the router, that will superseed the navigator of Vaadin 8. With the @Route annotation placed at the type definition of a view class, it is possible to use a template for…
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Creating a multi lingual web application is a common task in modern web development. Most (old-school) java web frameworks offer out-of-the-box solutions for this task, but for single-page-application frameworks like Vaadin, you need to come up with some fresh ideas for localization. The business requirements for a Vaadin i18n application I would like to collect…
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While I am still working with standard JEE architectures, I wanted to try out a Javascript frontend connecting to a Java backend in a self-contained application (SCA) for a long time. I am using Angular (at the moment the javascript UI framework with the biggest market share) and Vert.x for a showcase project. Vert.x sets…
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During the last couple of days, I had the task to call some rest endpoints for a backend application. So far, so good, so easy… I thought. However, something looked strange, when I tried to get a JWT authorization token, that I needed to perform other rest calls. The company that developed the rest endpoint…
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With version 8.3 of the Vaadin UI framework along with the official CDI addon for Vaadin, come a number of changes for CDI usage. Some enhancements were made for the CDI navigator and it is now possible to have nice readable and bookmarkable Urls in your vaadin application. I summed up the latest changes for…
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Separating the business logic from application code has been a customer’s dream and one of the most important architecture goals for many IT development projects. However countless “if – else” statements in your java project tell another story. With a solid MVP architecture and the integration of a business rule engine, developers can separate the…
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The Vaadin 8 framework uses the excellent Valo theme, which can be used out-of-the-box or as the base for a custom theme. The (old school) themes for Vaadin 7 (reindeer, runo and chameleon) are still usable with the vaadin-compability-themes.jar. During the last couple of weeks (June 2017) some interesting add-ons in the vaadin directory appeared…
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The model-view-presenter (aka MVP) architecture pattern is a good choice for Vaadin applications. It clearly separates the business logic from the UI code and improves testability. Well… I heard statements like that many times before without proper explanations or examples what makes a pattern so useful that we cannot start a new project without using…
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The MVP (model-view-presenter) is a solid architecture pattern for Vaadin projects of all sizes. However there are many ways to achieve it. I would like to have a MVP architecture in my Vaadin projects and use the cool features of the Vaadin framework and its eco-system like a WYSIWYG editor for UI layout or the…
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Single page web applications have become more and more popular as they support responsiveness in an elegant way and create great user experiences with fast rendering times. Vaadin is a leading Java single page web application framework that has a large eco system with many official and 3rd party add-ons. One essential add-on is the…
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When developing web applications with JSF and PrimeFaces most target users are still using PC or laptops as they will use the application mainly during work hours. Mobile devices like smartphones or tablets are supposed to work without code modifications, but most of the times there are no optimized layouts for those devices. PrimeFaces offers…
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Right now – as I am writing this post – Vaadin is my favourite UI framework for Java web applications. While alot of frameworks seem to create just as much problems as they are trying to solve, Vaadin helps me in creating stylish reactive user interfaces. In this post I will show how to use…
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Enterprise Architect (EA) is great tool to model classic UML structural and behavioral diagrams. It is a multi-purpose tool that supports a variety of programming languages like Java, C#, Php or Visual Basic. In the article Teaching EA Standard Java I explained how to use all Java classes and interfaces of standard and enterprise Java.I…
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Securing passwords is a common task for developers. Wildfly offers credential vaults for this task and manages to automatically use the secured passwords for datasources or active directory credentials. If you need to access a vault from java you need to read the SecurityVault with the help of the picketbox security classes of the Wildfly…
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When I prepared for the “Oracle Enterprise Architect Master Certification” I was introduced to Sparx Enterprise Architect. It was recommended as the best tool to model and design the practical tasks I had to solve during the certification process by the coach I met at the Oracle certification center. Enterprise Architect (EA) is always up-to-date…
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Creating a mircoservice with dropwizard is an easy task. You do some java coding and configure a YAML file to get a running microservice within a short time. The created jar artefact can be started and tested with the common java command. However if you would like to let your service run on a Microsoft…
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Dropwizard provides a great infrastructure for creating microservices. Jetty for http, Jersey for Rest, Jackson for JSON, Metrics for metrics and other useful helper libraries can be seen as a “best of breed” approach for developing microservices with the java platform. The usage of CDI in web- and backend applications however has been essential in…
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