Book Image

Mastering Hibernate

By : Ramin Rad, Koushik Srinivas Kothagal
Book Image

Mastering Hibernate

By: Ramin Rad, Koushik Srinivas Kothagal

Overview of this book

Hibernate has been so successful since its inception that it even influenced the Java Enterprise Edition specification in that the Java Persistence API was dramatically changed to do it the Hibernate way. Hibernate is the tool that solves the complex problem of Object Relational Mapping. It can be used in both Java Enterprise applications as well as .Net applications. Additionally, it can be used for both SQL and NoSQL data stores. Some developers learn the basics of Hibernate and hit the ground quickly. But when demands go beyond the basics, they take a reactive approach instead of learning the fundamentals and core concepts. However, the secret to success for any good developer is knowing and understanding the tools at your disposal. It’s time to learn about your tool to use it better This book first explores the internals of Hibernate by discussing what occurs inside a Hibernate session and how Entities are managed. Then, we cover core topics such as mapping, querying, caching, and we demonstrate how to use a wide range of very useful annotations. Additionally, you will learn how to create event listeners or interceptors utilizing the improved architecture in the latest version of Hibernate.
Table of Contents (16 chapters)

Statistics via JMX

In this section, we will discuss how you can collect Hibernate statistics via JMX. But first, we will briefly discuss the core concepts in JMX in case you have never used it.

Introduction to JMX

Java Management Extension (JMX) was officially added to the Java Standard Edition (J2SE) since version 5. At the core of its architecture is the MBean server, also known as the JMX agent. The MBean server manages the JMX resources. These resources are called MBeans, that is, managed beans, which are used for instrumentation; MBeans provide data or perform operations. In order to interact with an MBean, it has to be registered with the MBean server first. This is typically done in the code, or if you are using Spring, you can configure Spring to do it for you. We'll see how to do this in the next section.

Finally, MBeans are accessed through a remote manager. Java2SE ships with jconsole and jvisualvm to manage MBeans and monitor VM resources. The jvisualvm manager has a very nice...