Paul Sterl has written 21 articles

Quartz integration in JEE

Nowadays everybody talks about cloud and Microservices. The JEE container isn’t that sexy anymore. With microprofile.io the JEE world started to move into the direction of a more lightweight structure. We should also mention docker and friends which changed the way we deploy and run applications now.

Angular & Spring Boot

Problem We want to combine Spring and Angular use the Angular developing features but also be able to use the Spring IDE, in the end, everything should be build using maven and nicely packed into a JAR.Let’s get started. Overview Create a multi-module project Pack the frontend into an own JAR Include the frontend JAR…

IDE: Eclipse & VSCode

IDE & Plugins Angular/ Text: https://code.visualstudio.com/ Plugins GitLens Angular v7 Snippets Angular Language Service Java: https://spring.io/tools Tools for Windows Command Line: http://cmder.net/ Text Editor: https://notepad-plus-plus.org/ Database Graphical DB client for Eclipse https://dbeaver.io/ Local PostgreSQL DB for Mac OS https://postgresapp.com/ Eclipse Increase icon size for large screens Eclipse autoscale comes with some examples. Basically quarter means leave it…

Eclipse on a hight resolution screen

Problem Nowadays we have a screen with a resolution of 2560×1440 or 3440×1440 4K. The problem with Eclipse is, that all the icons and buttons stay very tiny and are hard to interact with. Solution The easiest solution is to adjust the eclipse.ini or STS.ini with the following parameters at the end: Fixed 200% scale…

JEE 7 Activiti integration

Overview To enable Activiti in our JEE project the following steps are needed: Add the maven dependencies — include spring-context Add log4j configuration Add the activiti configuration for CDI integration activiti.cfg.xml Add your first activiti workflow Add an activiti compatible data source to your container Deploy and run it Git Project. Eclipse Plugin To install the…

JPA default entity listener

The problem Sometimes we want to register a default Entity Listeners which are called as soon an entity is persisted, without adding the @EntityListeners annotation to our classes, as in most cases we anyway provide interfaces so we can access data on the entity itself. The problem is, that we cannot annotate our entity listener with…

AngularJS Cheat Sheet

Create vs. Get AngularJS application The module dependency array tells AngularJS to create an app, otherwise to load it: Create myApp var app = angular.module(‚myApp‘, []); Get myApp var app = angular.module(‚myApp‘); Binding @ Text binding, expressions are supported using {{ }} = Two-way binding & Method binding < One-way binding (usually for components) ?…

Android Fragments and Transactions

Problem Sometimes it is confusing how fragments work in Android and interesting side effects like: Why have Fragments empty constructors? Why shouldn’t I pass state variables like they are? Why do I need this Fragment transactions? What does addToBackStack mean and do I need it? Why is sometimes the Activity null in my fragment? Overview…

Java SSLContext and the SSLSocketFactory self-signed certificate

Problem Often we want to connect to create a secure SSL connection to an HTTPs endpoint which is secured by a self-signed Certificate. If we do so just with a simple call we usually face an nice exception like: Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested…

Android Bind Service to the Application cross Activities

The Problem Sometimes we want to bind an Android Service in our activities and wrap inside e.g. our communication to our backend. Now the problem arises when we unbind it again. As usually if we change activities we want this service to survive and be in the very next activity. As soon as we close…