Almost every application writes log files. Where organizations differ (vastly) is in how and to which extent these logs are used. Aside from the ultimate no-go of not checking them at all, this takes discipline and effort, especially for timely reactions. This post shows how to automate the tedious task of checking log files (especially those from Java backends), how to consolidate them into existing infrastructures (like the Windows Event Log) and how to effortlessly generate alerts for serious incidents.
Why :focus-within is huge
Writing a post on any CSS selector or property (or even any new one coming up) would produce a long (and boring) blog. But :focus-within is different – and it’s something I have been waiting for forever. To me, it’s more than another pseudo-class, it’s a game-changer in many ways. And it’s in the stable versions of both Chrome and Firefox (and others). See the MDN page on :focus-within for a full (and esp. up2date) info on browser support.
What :focus-within does is quite simple, actually: it allows styling the parent(s) of the element that has the focus. Opposed to :focus (which references the element having the focus itself), it can be the direct parent, or the parent’s parent or the parent of the parent’s parent or… (you get it).
Quickstart vaadin (mobile) applications with Vaadinator – part 1: Introduction
Vaadinator generates a vaadin-based User Interface (both mobile and Desktop), backend and testing facilties from an annotated Domain class. It borrows much from the Domain Driven Design idea. Our intention is to get people productive with vaadin and excited about vaadin – even those who never worked with it before. Vaadinator is free and open source (Apache 2.0-licensed).
Using HTML5 inputs in vaadin
Given the browsers running on smartphones (and increasingly also those running on the desktop), all the “new” input types coming with HTML5 become increasingly important. For instance:
<input type=“time“ …
makes iPhone, Android et al present an optimized way of selecting a time / duration:
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