Home » Author Archives: Eyal Golan

Author Archives: Eyal Golan

Eyal is a professional software engineer and an architect. He is a developer and leader of highly sophisticated systems in different areas, such as networking, security, commerce and more.

Working with Legacy Test Code

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Legacy Code and Smell by Tests Working with unit tests can help in many ways to improve the code-base. One of the aspects, which I mostly like, is that tests can point us to code smell in the production code. For example, if a test needs large setup or assert many outputs, it can point that the unit under test ...

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Dropwizard, MongoDB and Gradle Experimenting

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Introduction I created a small project using Dropwizard, MongoDB and Gradle. It actually started as an experimenting Guava cache as buffer for sending counters to MongoDB (or any other DB). I wanted to try Gradle with MongoDB plugin as well. Next, I wanted to create some kind of interface to check this framework and I decided to try out DropWizard. ...

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Java 8 Stream and Lambda Expressions – Parsing File Example

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Recently I wanted to extract certain data from an output log. Here’s part of the log file:                   2015-01-06 11:33:03 b.s.d.task [INFO] Emitting: eVentToRequestsBolt __ack_ack [-6722594615019711369 -1335723027906100557] 2015-01-06 11:33:03 c.s.p.d.PackagesProvider [INFO] ===---> Loaded package com.foo.bar 2015-01-06 11:33:04 b.s.d.executor [INFO] Processing received message source: eventToManageBolt:2, stream: __ack_ack, id: {}, [-6722594615019711369 -1335723027906100557] 2015-01-06 11:33:04 ...

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Working With Legacy Code, What does it Really Mean

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At the end of January I am going to talk in Agile Practitioners 2015 TLV. I’ll be talking about Legacy Code and how to approach it. As the convention’s name implies, we’re talking practical stuff. So what is practical in working with legacy code? Is it how to extract a method? Or maybe it’s how to introduce setter for a ...

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Playing With Java Concurrency

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Recently I needed to transform some filet that each has a list (array) of objects in JSON format to files that each has separated lines of the same data (objects). It was a one time task and simple one. I did the reading and writing using some feature of Java nio. I used GSON in the simplest way. One thread ...

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It’s All About Tests – Part 3

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In the previous two posts I discussed mostly about the philosophy and attitude of developing with testing. In this post I give some tips and tools examples for testing. Tools JUnit http://junit.org/ There’s also TestNG, which is great tool. But I have much more experience with JUnit so I will describe this framework.   Use the latest version. Know your ...

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It’s All About Tests – Part 2

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This is the second post of the series about testing. In the first part I explained about the mindset we need to have while developing with tests. Or, in better words, developing for testable code. In this part I will cover some techniques for testing approach. The techniques I will describe can be seen as how to transform the mindset ...

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It’s All About Tests – Part 1

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This post is the first of a series of three. Mindset of testing Techniques Tools and Tips The Mindset Testing code is something that needs to be learned. It takes time to absorb how to do it well. It’s a craft that one should always practice and improve.   Back in the old days, developers did not test, they checked ...

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Using Groovy for Bash (shell) Operations

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Recently I needed to create a groovy script that deletes some directories in a Linux machine. Here’s why:                   We have a server for doing scheduled jobs. Jobs such as ETL from one DB to another, File to DB etc. The server activates clients, which are located in the machines we want ...

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JUnit Rules

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Introduction In this post I would like to show an example of how to use JUnit Rule to make testing easier. Recently I inherited a rather complex system, which not everything is tested. And even the tested code is complex. Mostly I see lack of test isolation. (I will write a different blog about working with Legacy Code). One of ...

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