Bartek Zdanowski – Team Blog

Error:(, ) java: package edu.umd.cs.findbugs.annotations does not exist using Lombok

If you have an error during compilation in IntelliJ Idea and/or maven/gradle

Error:(X, Y) java: package edu.umd.cs.findbugs.annotations does not exist

you've enabled FindBugs Suppress Warnings in lombok.config:

lombok.extern.findbugs.addSuppressFBWarnings = true

but you forgot to add FindBugs to your maven/gradle config...
You might either remove config directive or add FB dependency.

Friday hackathon

Every month we have a Friday Hackathon, where we can code or create anything we want. That’s for the purpose of evaluating new technologies, doing crazy stuff Read more

What’s the cause of your problem?

Most of exceptions has a few constructors including those with cause exception. But what if you have to throw an exception that has no cause in constructor? You try to survive:


 Exception cause = new Exception("I'm the cause!");
 SSLHandshakeException noCauseExc = new SSLHandshakeException(String.format("SSL problem: [%s]", cause.getMessage()));
 noCauseExc.printStackTrace();

...and you lose stacktrace which is crucial! There's a solution Throwable::initCause(). Check this code and have cause tailed to your exception


import javax.net.ssl.SSLHandshakeException;

/**
 * Created by bartek on 04.09.15.
 */
public class Cause  {

    public static void main(String[] args) {

        Exception cause = new Exception("I'm the cause!");
        SSLHandshakeException noCauseExc = new SSLHandshakeException(String.format("SSL problem: [%s]", cause.getMessage()));
        noCauseExc.printStackTrace();

        SSLHandshakeException withCauseExc = new SSLHandshakeException("Another SSL problem");
        withCauseExc.initCause(cause);
        withCauseExc.printStackTrace();
    }
}

Restart or power off Rasperry PI with REST call

If you need to restart or power off your RPi remotely (or through local application's call) here's a simple way

http://raspberry.address:7000/reboot
http://raspberry.address:7000/power/off

Details and code at https://github.com/zdanek/raspiPowerServer

Abstract method in Enums

Did you know that you can do that?

  private static enum DynamicProperty {

        cacheManagerName {
            @Override
            void applyChange(final PropertyChangeEvent evt, final RuntimeCfg

EhCache config with BeanUtils

BeanUtils allows you to set Bean properties.
If you have configuration stored in a Map it’s tempting to use BeanUtils to automagically setup EhCache configuration. Read more

Our build lights in action

Here you can see our build lights in action. Still at lab I’m making sure everything works properly.

Our build lights

It’s been some time since we’ve launched toukLab which is a kind of HackerSpace for our employees. Besides our core business – mainly enterprise software for Read more

BitBucket push/pull keeps asking me for password

It does it even if you've added your ssh key?! Really? So edit .git/config and change repo url from https to ssh. It should look like this url = git@bitbucket.org:your_login/your_project.git If you don't know the address then go to your bitbucket repo page and check SSH address on the project's Overvier tab. Don't forget to set up your name (bitbucket login) in [user] section. Refer git manual or just type $ git config user.name your_login $ git config user.email your_email

Http server with PHP on RaspberryPI

Totally awesome guide is at http://rasberrypibeginnersguide.tumblr.com/post/27283563130/nginx-php5-on-raspberry-pi-debian-wheezy
But instead using Read more