Hibernate generates proxies to provide lazy loading for to-one associations, and you can use them to improve the performance of some of your write operations. You might have seen the class names of these proxies in your debugger or some log messages. They consist of the name of your entity class and a postfix that…
Hibernate provides 2 proprietary features that enable you to define additional filter criteria that Hibernate applies to every query that selects a specific entity class. This article will show you how to use the @FilterDef and @Filter annotations, which is the more flexible approach. You can activate and deactivate filter definitions for your current session…
Hibernate Envers is a popular library that automates the creation of an audit log. As I’ve shown in previous articles, it logs all write operations performed using your entity classes in an audit log and provides a flexible API to query data from that log. Based on these articles, I got recently asked if Hibernate…
JPA and Hibernate make it very easy to model associations between entities. You can model associations between 2 concrete classes or model a polymorphic association to an inheritance hierarchy. These mappings are more than sufficient for almost all of your association mappings. But sometimes, you might want to model a polymorphic association to independent entity…
One of the common questions when analyzing a slow application is if there are any slow database queries. You can, of course, monitor these queries on your database. But then you still need to match them with a part of your Java code. And because there is no easy way to see what happened immediately…