Blog - At a Glance of a Key

The Mossad Challenge 2018 – Entry Riddle

2018-04-20 Cyber Security 2 minute read

For the Israeli independence day, the Mossad published a new challenge. When I have some free time I try to crack it and enjoy learning new stuff in the process 🙂 Let’s start? If we’ll go the the Mossad webpage, we’ll see the following picture: As you can see, there…

Marking field as required when using Lombok Builder

2018-03-28 Development Tips & Tricks 2 minute read

The builder pattern is nice and useful, and using Lombok @Builder annotation instead of implementing it each time can save a lot of time. However, there is one problem with this. You can’t really define a required field. For example, Let’s assume we have this class: 123456@Value @Builder public class…

Simple item versioning with DynamoDB

2018-03-26 Development 4 minute read

Occasionally you want to store information in a database with keeping versioning, so you will be able to retrieve previous versions of the record. In this example, we will use AWS DynamoDB and take advantage of some of its features. For the example, lets take a simple record that contains…

Life got much easier – Using Lombok with Java

2018-03-12 Development Tips & Tricks 4 minute read

After more than 5 years programming in C++, recently I’ve started my first steps programming in Java. There are many differences and I’ll try to share some tips that will make your lives better 🙂 First one is Project Lombok. From their documentation: Project Lombok is a java library that…

Getting the right Jenkins build number using Python

2017-06-27 Tips & Tricks 3 minute read

One of the jobs in our CI pipeline is responsible for compiling, building and packing the code. The artifacts of the job is a directory on our storage with the build number and all the artifacts that are related to this build number. For example: //storage/build_1000, //storage/build_1001 and etc. There…

Proper use of static keyword

2017-06-12 Debugging Development 1 minute read

Recently I found a funny bug in our code and I wanted to share some insights on it so you won’t do the same mistakes. Let’s assume we have a function that produces a lot of output and it can run from multiple threads. I wrote a simple program to…