Hi, today I would like to discuss in short different ways of injecting dependencies into your classes. In general you have the following three options for injection directly into fields/attributes via explicit setter methods via explicit constructor parameters Field injection This type of injection instruments some kind of reflection mechanism for injecting the required dependencies into the class. […]
Strategies to migrate from an DAO library
In this post I will discuss several strategies to handle the following situation: You’re working on a legacy project that uses a company library with DBOs and DAOs for accessing the database. But the generator for this library is broken and you have to make changes to the DBOs and/or DAOs. Basic cases You will face the following three basic […]
Tutorial – Docker, JPA and Testing
Hi, a few weeks ago I attended the BED – Con. One of the talks I listened to, was about Docker (given by Dr. Halil-Cem Gürsoy). One of the ideas that came directly to my mind was, to use docker for creating separate instances of the finally used database for tests that can’t use databases like […]
Creating beautiful release notes with git, gradle and markdown
During the last days I asked myself how to generated releases notes from information that are available in commit / tag messages from git. The decisions My first approach was to create the list of changes directly from the commit messages, but this approach has multiple drawbacks. The commit messages must be written very disciplined […]
Released : CDIProperties – v.1.0.0
Inspired by the tutorial about writing CDI extensions I wrote several days ago I created a CDI extension which targets exactly this topic CDIProperties This handy library enables a CDI (in a standalone or application server environment) application to directly inject properties from a property file. It’s extensible via an SPI, so that you can […]
Tutorial: Writing your own CDI extension
Today I will show you how to write a CDI extension. CDI provides a easy way for extending the functionality, like adding own scopes, enabling java core classes for extension, using the annotation meta data for augmentation or modification, and much more. In this tutorial we will implement an extension that will inject properties from […]
Tip: Disable log4j 2’s shutdown handler
At the moment I develop at tyntec an java application that should run as a daemon process on a server to process files and send the result to a remote data sink. One crucial part of this application is the shutdown. Currently running file processing tasks must run to the end. Queued ones should be […]
Using CDI standalone
Today I will show you how to use CDI in your appplication, when you don’t have the a JEE server. CDI is the Context and Dependency Injection, as defined in the JSR-346 (CDI 1.1) and JSR-299 (CDI 1.0). It is a powerful and lightweight mechanism that provides dependency injection, contextual lifecycles, events, decorators and interceptors. But […]
DataFX – @Named support (accepted)
During the christmas and new year holidays I implemented the @Named feature for DataFX. It’s already accepted and merged into the validation branch of DataFX (Thanks to Hendrik Ebbers). This feature enables a user to inject different instances of a bean into a controller, distinguished by a resource name via @Named annotation. You can, for […]
GIT & ZShell : Colorize your shell depending on your branch
As announced in my last post I asked my colleague Tillman if I’m allowed to post his nice extension for the zshell (as you may have concluded he gives his OK ). And here it is
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# Required to have the colour names autoload colors zsh/terminfo if [[ "$terminfo[colors]" -ge 8 ]]; then colors fi for color in RED GREEN YELLOW BLUE MAGENTA CYAN WHITE; do eval PR_$color='%{$terminfo[bold]$fg[${(L)color}]%}' eval PR_LIGHT_$color='%{$fg[${(L)color}]%}' (( count = $count + 1 )) done PR_NO_COLOUR="%{$terminfo[sgr0]%}" # Thanks Tillman function get_color(){ BRANCH=`git rev-parse --abbrev-ref HEAD` case "$BRANCH" in *master*) COLOR=${PR_RED} ;; *hotfix*) COLOR=${PR_MAGENTA} ;; *release-candidate*) COLOR=${PR_YELLOW} ;; *release*) COLOR=${PR_YELLOW} ;; *bugfix*) COLOR=${PR_CYAN} ;; *develop*) COLOR=${PR_BLUE} ;; *) COLOR=${PR_GREEN} ;; esac echo $COLOR } |
The color mapping is the same as in these graphic Applying can be done, for example, when adding this git […]