August 2015

Connection Pooling with Hibernate 4

By | 2017-07-10T19:00:48+00:00 August 19th, 2015|Hibernate|

We have arrived at a state with Hibernate 4 where we can change the database behind the system to go for production usage (so H2 databases are out of the question). Now it is time to look at connection pooling, because the default connection pooling mechanism of Hibernate is rudimentary and is provided only for [...]

Multi-tenancy with Hibernate 4

By | 2017-07-10T19:01:01+00:00 August 17th, 2015|Hibernate|

Multi-tenancy indicates an approach in software development where a single application simultaneously serves multiple clients. These clients are also called tenants. This approach is very common in Software as a Service (SaaS) solutions. […]

Concurrency control with Hibernate 4

By | 2017-07-10T19:01:15+00:00 August 15th, 2015|Hibernate|

Most of the time it is OK to simply let the database do the work of concurrency control, however sometimes you can encounter an application where you need to take over. In this article I will give a brief introduction to optimistic and pessimistic concurrency control. […]

Auditing with Hibernate 4

By | 2017-07-10T18:59:55+00:00 August 15th, 2015|Hibernate|

In this article I will give you a brief introduction to Entity auditing with Hibernate, or to be more specific with Hibernate Envers which is since some 3.x version part of the Hibernate core. […]

Caching with Hibernate 4

By | 2017-07-10T18:58:52+00:00 August 8th, 2015|Hibernate|

If you have a bigger application you think about performance and how you can improve it. Caching is one way to do this because it enables less queries going to the database. Querying the database is always a performance impact because it is an I/O operation. And I/O operations are much slower than operations using [...]

July 2015

Entity relations with Hibernate 4

By | 2017-07-10T18:50:41+00:00 July 12th, 2015|Hibernate|

Last time I introduced annotations instead XML configuration. Now I will dig deeper and show how you can create entity relations and map them to the database. If you look at the Book entity in the example you might think: “Why store the authors of a book as a String?” and you are right. This [...]

Hibernate 4 Database configuration

By | 2017-07-10T18:51:52+00:00 July 12th, 2015|Hibernate|

In the previous articles I have shown you how to get started with Hibernate 4: create entities, manage relations and inheritance and how to query the stored data. However every time I used an in-memory database which means that every time you stop the application the inserted data vanishes. […]