Latest Articles

Container vs Application Managed EntityManager

22 January 2015

In this article we will cover Container vs Application Managed EntityManager (Persistence Context) and its relationship with JTA or RESOURCE LOCAL transaction management.

The Persistence Context and the Entity Manager are two core concepts of the Java Persistence API (JPA). In short: The Persistence Context is responsible for JPA entity management: When an applicatio... Read more

EJB multiple datasource transaction example

08 May 2014

In this article we will see how to configure EJB transactions across multiple datasources

Sometimes we may need our EJB transactions to spawn across multiple datasources. For this to be possible one must take advantage of the enterprise container Transaction Manager and the Java transactio... Read more

ejb java-ee jpa jta xa

Java EE EJB transaction propagation (@TransactionAttribute) tutorial

08 July 2013

In this tutorial we will see the available transaction propagation behaviours provided by the EJB container using @TransactionAttribute annotation.

While dealing with Container Managed Transactions (CMT) in EJB, the application developer is able to declaratively define how an arbitrary call to an EJB method should behave in terms of transaction p... Read more

ejb java java-ee jpa jta tx

Spring JTA multiple resource transactions in Tomcat with Atomikos example

17 June 2013

In this tutorial you will learn how to configure a JTA transaction manager outside an enterprise container - using the Spring framework and Atomikos, both deployed in Tomcat - in order to implement distributed multiple resource (or XA) transactions.

Distributed multiple resource transactions in Java are usually accomplished by resorting to the Java Transaction API (JTA). One usually delegates the task of distributed transaction coordination to an... Read more

atomikos hibernate java jpa jta spring tomcat tx xa

About the author

Gonçalo Marques is a Software Engineer with several years of experience in software development and architecture definition. During this period his main focus was delivering software solutions in banking, telecommunications and governmental areas. He created the Bytes Lounge website with one ultimate goal: share his knowledge with the software development community. His main area of expertise is Java and open source.

GitHub profile: https://github.com/gonmarques

He is also the author of the WiFi File Browser Android application: