Hibernate 4.2.8 , javassist 3.18.1 and ClassCastExceptions – watch out your classpath

I am writing this post as a tip and warning rather than an absolute solution. I will try to come…

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Workshop on Creating a Personal MusicManager Web Application with Struts2, Hibernate and MySQL

Overview: In this workshop tutorial we’ll develop a personal music manager application using Struts 2, Hibernate and MySQL database. The…

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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…

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Hibernate Facts: Integration testing strategies

I like Integration Testing, it’s a good way to check what SQL queries Hibernate generates behind-scenes. But Integration Tests require…

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ID Lists Aren’t the Best Solution for the N+1 Problem

In their eternal attempts to circumvent the N+1 problem, Hibernate users often resort to IN predicates with ID lists. In…

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Hibernate Facts: Equals and HashCode

Every Java object inherits the equals and hashCode methods, yet they are useful only for Value objects, being of no…

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Hibernate Facts: Multi level fetching

It’s quite common to retrieve a root entity along with its children associations on multiple levels. In our example we…

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Hibernate Facts: Knowing flush operations order matters

Hibernate shifts the developer mindset from thinking SQL into thinking object state transitions. According to Hibernate Docs entity may be…

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Hibernate Facts: The importance of fetch strategy

When it comes to working with an ORM tool, everybody acknowledges the importance of database design and Entity-to-Table mapping. These…

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