About Vlad Mihalcea

Vlad Mihalcea is a software architect passionate about software integration, high scalability and concurrency challenges.

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Hibernate Facts: How to “assert” the SQL statement count

Introduction Hibernate simplifies CRUD operations, especially when dealing with entity graphs. But any abstraction has its price and Hibernate is no different. I’ve already talked ...
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MongoDB and the fine art of data modelling

Introduction This is the third part of our MongoDB time series tutorial, and this post will emphasize the importance of data modelling. You might want to check the first part of this ...
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A beginner’s guide to MongoDB performance turbocharging

Introduction This is the second part of our MongoDB time series tutorial, and this post will be dedicated to performance tuning. In my previous post, I introduced you into our virtual ...
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MongoDB time series: Introducing the aggregation framework

In my previous posts I talked about batch importing and the out-of-the-box MongoDB performance. Meanwhile, MongoDB was awarded DBMS of the year, so I therefore decided to offer a more ...
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A Beginner’s guide to ACID and database transactions

Transactions are omnipresent in today’s enterprise systems, providing data integrity even in highly concurrent environments. So let’s get started by first defining the term and ...
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Good vs Bad Leader

Software is more about people than technology. When I graduated from college, I thought I only had to master technical skills to be a great developer, thinking that people skills are ...
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NoSQL is not just about BigData

There is so much debate on the SQL vs NoSQL subject, and probably this is our natural way of understanding and learning what’s the best way of storing data. After publishing the small ...
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MongoDB Facts: Lightning speed aggregation

In my previous post, I demonstrated how fast you can insert 50 millions time-event entries with MongoDB. This time we will make use of all that data to fuel our aggregation tests. This ...
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Why I like Spring bean aliasing

Spring framework is widely used as a dependency injection container, and that’s for good reasons. First of all, it facilitates integration testing and it gives us the power of customizing ...
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Hibernate Facts: Always check Criteria API SQL queries

Criteria API is very useful for dynamically building queries, but that’s the only use case where I’d use it. Whenever you have an UI with N filters that may arrive in any M combinations, ...
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