Modular containers

A modular is a container for one or more EJB containers. An EJB server manages and coordinates allocation of EJB application resources, J2EE naming functionality, communication with remote resources, etc. A modular container manages the actual EJBs including their lifecycle, object pooling, security, transactions, etc. The modular container is all about concentrating user transaction requests into a shared database. The application server is the modern TP monitor, and the EJB is where the transactional interaction with the database happens. Find information about modular containers and how to properly contain transactions in a shared database.

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Tip 04 Jan 2022
The pros, cons and challenges of containerized microservices

Containerized microservices are certainly a popular deployment approach, but are they the best? They can be, provided you overcome the unique challenges they present. Continue Reading
Quiz 08 Sep 2021
A monolithic vs. cloud-native migration quiz for developers

Are you prepared for a cloud-native migration? This quiz contrasts the microservice vs. monolithic approaches to software development and will help gauge your knowledge. Continue Reading

Blog Post 28 Sep 2022

Understanding the Kubernetes Container Runtime Interface

The Kubernetes Container Runtime Interface adds options beyond Docker for container orchestration. Here's a rundown of how Kubernetes and the CRI work. Continue Reading
Blog Post 17 May 2022

How to dockerize Apache httpd websites example

Need to dockerize Apache? Want to build a custom Docker httpd image that hosts your website? Here's a simple Apache Dockerfile example to build a custom httpd Docker image for your website. Continue Reading
Blog Post 09 May 2022

Imperative vs. declarative Kubernetes commands: What's the difference?

Imperative and declarative Kubernetes commands are the two different ways to configure the state of your clustered environment. Here we compare declarative versus imperative commands and show you ... Continue Reading
Blog Post 31 Oct 2021

What is the difference between a Docker image vs a container?

Wondering what the difference is between a Docker image and container? Here we make the Docker container vs image comparision and show you how the two concepts differ. Continue Reading
Quiz 08 Sep 2021

A monolithic vs. cloud-native migration quiz for developers

Are you prepared for a cloud-native migration? This quiz contrasts the microservice vs. monolithic approaches to software development and will help gauge your knowledge. Continue Reading
Blog Post 31 Aug 2021

When to you Docker vs Podman? A developer's perspective

Docker and Podman play two very separate and distinct roles in the modern DevOps pipeline. Here we compare Docker and Podman and show you how to choose which one is best for you. Continue Reading
Blog Post 31 Aug 2021

Docker versus Virtual Machines: Which DevOps tool is best?

Forced to choose between Docker and a virtual machine, which one should a developer choose. Here we compare and contrast the two DevOps tools and let you know which one is best to use. Continue Reading
Feature 06 Aug 2021

How to build a Spring Boot 12-Factor app

Here we look at how the Spring Boot framework supports the Twelve-Factor App methodology, and where tools such as GitHub, Docker and Kubernetes fill in the voids. Continue Reading
Tutorial 25 Aug 2020

WebAssembly Hub boosts Envoy filter development

Examine WebAssembly Hub's features, why developers have turned to the portal to share Envoy filters and how it seems to be built for the long haul. Continue Reading
Feature 28 Jul 2020

Reduced cost, responsive apps from micro front-end architecture

Micro front-end development has grown in prominence though has not yet found its footing in the enterprise. Learn more about micro front ends and consider some potential pros and cons. Continue Reading
Blog Post 30 Mar 2020

How to go beyond Docker with WebAssembly on the server-side

Docker changed the way services and applications are designed, implemented and deployed. Before Docker, applications and services had to work cooperatively on the same machine. Sometimes they did, ... Continue Reading
Video 06 Jan 2020

Simplify a cloud-native, Spring Boot Docker deployment

How do you deploy a Spring Boot application to Docker? It's not as complicated as you might think. Follow this example to move and test your app within a container. Continue Reading
Video 01 Jan 2019

Step-by-step RESTful web service example in Java using Eclipse and TomEE Plus

In this easy-to-follow JAX-RS tutorial, we provide a RESTful web service example in Java using Eclipse and TomEE Plus, where we go from development to testing in less than 15 minutes. Continue Reading
Video 15 Oct 2018

How to deploy Docker Hub-hosted microservices in AWS ECS

In this AWS ECS tutorial, we take a Spring Boot app contained in a Docker Hub-hosted image and deploy the associated microservices in AWS using Elastic Container Service. Continue Reading
Video 06 Sep 2018

Let's dispel three common Java microservices myths

It's easy to develop Java microservices, but confusion over what they are and how they work tends to muddy the waters. Here, we clarify a few myths pertaining to Java microservices. Continue Reading
Video 06 Aug 2018

Step-by-step SOAP web services example in Java using Eclipse

There was a time when creating a SOAP web service was an arduous task. In this step-by-step SOAP web services example in Java using Eclipse, let's show how times have changed. Continue Reading
Video 26 Jul 2018

Step-by-step Spring Boot RESTful web services example in Java using STS

In a previous tutorial, we explained the basic tenets of good RESTful web service design. In this step-by-step Spring Boot restful web services example, we implement it. Continue Reading
Video 20 Jul 2018

IoC example in Spring: Inversion of control explained clearly and quickly

All enterprise development frameworks are built around inversion of control. This IoC example demonstrates how it manifests itself in frameworks like Spring and Jakarta EE. Continue Reading
Video 07 Jul 2018

RESTful APIs tutorial: Learn key web service design principles

RESTful Java API designs shouldn't be hard to get right. This RESTful APIs tutorial shows core RESTful principles concerning URL structure and the effective use of HTTP methods. Continue Reading
Blog Post 06 Jul 2018

Embed a WebSphere Liberty profile in an executable JAR with Maven

The last step you take before deploying your Java web apps into containers is packaging them in executable JAR files. Here we show you how to take the WebSphere Liberty profile's open source ... Continue Reading
Feature 26 Jun 2018

Red Hat's Operator Framework set to overhaul Kubernetes clusters

Operator Framework is designed to ease deployment and management of apps on top of Kubernetes clusters. We break it down with former CoreOS CEO Alex Polvi. Continue Reading
Feature 22 May 2018

Packaging Java programs in the modern age of microservices and mobile apps

The packaging of Java programs has taken an interesting turn, as the original JAR format becomes a favorite even for Java web apps deployed as microservices. Continue Reading
News 02 Mar 2018

Simplified automated cloud deployment with Bitnami's Stacksmith

Looking to do automated cloud deployment, or even help with security updates to your apps running in Docker containers? Bitnami's recently released Stacksmith promises to do just that. Continue Reading
Blog Post 23 Jan 2018

Choosing the right container orchestration tool for your project

With so many competing container orchestration tools on the market, it's difficult to settle on which one to choose. But for many, Kubernetes is the right choice, and here's why. Continue Reading
Podcast 09 Jan 2018

Fearless enhancement of legacy Java code with new SE features

While the Java SE 9 release has everyone talking about new features and syntax enhancements, JNBridge's Wayne Citrin insists legacy Java developers need not feel left behind. Continue Reading
Guide 27 Dec 2017

Neutralizing threats and creating a secure Java software stack

This essential guide explores how developers can create a secure Java software stack, from the APIs used by the JDK to the methodologies used by Agile and DevOps teams. Continue Reading
Podcast 20 Dec 2017

The best way to start creating cloud-native Java applications

How do software engineers transition traditional Java EE development into a world of cloud-native Java? Heptio's Craig McLuckie provides insights on transitioning. Continue Reading
Feature 06 Nov 2017

Owning the Java Platform is more of a burden or a blessing

Oracle became stewards of the Java platform as a by-product of their acquisition of Sun Microsystems. But looking back, it seems that the Java Platform has been more of a burden than a blessing. Continue Reading
News 06 Oct 2017

Java modules and Project Jigsaw a source of JavaOne 2017 pride

It wasn't easy getting Project Jigsaw ratified, but it is now part of the Java SE 9 package, and Oracle executives at JavaOne 2017 couldn't be prouder. Continue Reading
Podcast 27 Sep 2017

Cloud-native apps push static code analysis tools to the limit

The distributed nature of a cloud-native architecture, with microservices deployed to a multitude of containers, can test the limits of static code analysis tools. Continue Reading
Feature 12 Sep 2017

Containers and microservices complicate cloud-native security

As microservices-based applications are deployed to a sea of Docker containers, mitigating against cloud-native security issues is becoming a struggle. Continue Reading
Podcast 07 Sep 2017

Microservices and containers can simplify DevOps security

You would think that managing a sea of containers and microservices would make DevOps security difficult, but it may, in fact, make DevSecOps easier. Continue Reading
Podcast 06 Sep 2017

Cloud-native tooling for managing loosely coupled systems evolving

How does an organization manage loosely coupled systems built with containers and microservices? Apprenda's Sinclair Schuller discusses how tools are evolving. Continue Reading
Feature 05 Jul 2017

Cloud native adoption means getting the DevOps tooling right

There are so many DevOps tooling options in the world of cloud native computing that many companies looking at a microservices and container based architecture are being overwhelmed by the options. Continue Reading
Feature 20 Jun 2017

Effective DevOps hinges on automating a continuous delivery pipeline

Many organizations struggle with bringing development and operations together, only to realize that effective DevOps means successfully automating a continuous delivery pipeline. Continue Reading
Feature 11 May 2017

Effective DevOps pipelines require a continuous delivery tool chain

The key to an effective DevOps implementation is understanding your tools, and implementing an effective continuous delivery tool chain. Continue Reading
Opinion 05 May 2017

Cloud-native vendor consolidation key to container technology adoption

Production deployment of containers and microservices currently requires the best technologies. Cloud-native vendor consolidation will simplify decisions but limit choice. Continue Reading
News 20 Apr 2017

LinuxKit, Moby push developers toward collaborative systems

Docker offers two new projects: a toolkit for building secure, lean and portable Linux subsystems and a way for developers to collaborate on interchangeable components. Continue Reading
Podcast 03 Apr 2017

Container tools fighting hard to keep up with the Docker trend

Tooling often lags behind big technology trends, which is why the container tools industry is being forced to mature quickly as Docker adoption takes off. Continue Reading
Guide 28 Feb 2017

Developers' guide to deploying microservices and containers

As enterprises move toward more modular and self-contained components, the move toward microservices and container deployment, like Docker, is a natural step. Continue Reading
Feature 02 Jan 2017

Top 5 challenges a successful IoT hackathon must overcome

Tahir Hussain, CEO of Collide Village, made it clear that running an IoT hackathon is no easy task. Here's what had to be overcome to make the IoT event successful. Continue Reading
Feature 08 Dec 2016

Docker instances become the new norm and adoption goes mainstream

Many organizations use Docker instances for many reasons, although security, data storage and monolithic fears remain barriers to Docker adoption. Continue Reading
Feature 03 Nov 2016

The benefits of container development with Docker

Development with Docker instances is popular among software development teams because it simplifies the process of building and shipping apps. Continue Reading
Blog Post 21 Oct 2016

Advanced container architectures: Kubernetes clouds and distributed Docker deployments

Be it AWS or Azure, cloud providers on both ends are making it easy to take Docker and Kubernetes architectures to the cloud. Continue Reading
Blog Post 11 Oct 2016

Microservice APIs the key to middleware management and container deployments

For consumers and creators of middleware, microservices, and APIs, the future is bound to be complex. But it will be full of examples of big business taking risks to get it right. Continue Reading
News 22 Sep 2016

Fight antipatterns with YAGNTI: You ain't gonna need that interface

To go along with acronyms like TAGRI and YAGNI, we'd like to add YAGNTI: You ain't gonna need that interface. Learn why that applies to JavaOne 2016. Continue Reading
Blog Post 20 Sep 2016

JavaOne 2016: What's driving digital transformation?

Why is customers' rapid adoption of mobile devices and social media is spurring an increase in businesses' digital transformation. Continue Reading
Blog Post 20 Sep 2016

From Jenkins World to JavaOne, Docker and container technology pervades

What's hot in the world of Java development? Hands down, it's container technology, as evidenced by the attention it has garnered at both JavaOne and Jenkins World. Continue Reading
Feature 11 Sep 2016

Establishing a coherent API for the Internet of Things (IoT)

The rapid growth of smart devices is inspiring many developers to create applications for home monitoring, health, and other services. But these applications are dependent on early adopters that actually buy and install hardware. Read on to find out how innovative companies are starting to craft IoT applications without this overhead. Continue Reading
News 13 Jul 2016

Simplified portable applications with Docker and microservices

As the industry moves away from traditional SOA, organizations are instead choosing to create portable applications with SOA and microservices. Continue Reading
News 12 Jul 2016

Don't let unfounded Docker fears deter container technology adoption

Container technology is changing the enterprise software landscape, but many unfounded fears are delaying Docker adoption. Continue Reading
News 22 Jun 2016

New Docker tools to revolutionize the desktop OS

Software containers are a powerful technology, but, finally, Docker tools for Windows and Mac will bring usability to the masses. Continue Reading
News 22 Jun 2016

Appease DevOps concerns with container as a service Docker deployments

At DockerCon 2016, the big trend from exhibitors is the container as a service, creating a smooth path for Docker adoption. Continue Reading
News 22 Jun 2016

Why build a serverless architecture with microservices and containers?

Many organizations are moving away from the big, monolithic server stacks and are instead building serverless architectures with Docker and microservices. Continue Reading
News 21 Jun 2016

Docker security, container performance the hot topics at DockerCon 2016

Operation teams are always concerned about software vulnerabilities, but at DockerCon 2016, vendors are working hard to allay those Docker security concerns. Continue Reading
News 21 Jun 2016

Simple Docker image acquisition the key to IBM's container strategy

By making it easier for clients to acquire a Docker image, IBM hopes to see more enterprises adopting a container-based development strategy. Continue Reading
News 21 Jun 2016

Docker microservices grab the spotlight at DockerCon 2016

With a move away from SOA-based architectures, along with the container adoption trend, it's not surprising to see more and more people talking about Docker microservices. Continue Reading
Feature 13 Jun 2016

How the Docker Engine simplifies DevOps, from staging to deployment

While virtualization is nothing new, the way the Docker Engine creates portable apps that can be replicated from development to deployment is helping simplify all aspects of ALM. Continue Reading
News 04 Dec 2015

Get caught up debugging Java apps with containerization

At JavaOne 2015, consultant Daniel Bryant discusses how debugging Java apps within containerization is ramping up. Continue Reading
News 01 Dec 2015

How to setup a local Maven repository server for artifact hosting

This article looks at how to setup a local Maven repository, along with the functionality a local Maven repository server should provide. Criteria for choosing a private, local Maven repository are listed, along with Maven tutorials on how to setup Artifactory and Nexus. Continue Reading
Tip 20 Nov 2015

How to automate a Kubernetes cluster to manage containers

The software industry is rallying around Kubernetes clusters as a way to automate deployment of container collections. Here are best practices for using a Kubernetes cluster. Continue Reading
Feature 06 Jul 2015

Docker containers are growing up and embracing open standards

In this new world where containers are challenging virtualized environments, Docker has had to grow up fast, and not only is it growing up, but it's opening up to new standards as well. Continue Reading
Podcast 24 Jun 2015

Red Hat engineer talks system optimization, containers

In this podcast, a principal software engineer at Red Hat talks about important industry trends, including containerization and system optimization. Continue Reading
News 23 Jun 2015

Red Hat announces support for the Open Container Project

Red Hat joins other vendors to support the Open Container Project, not a surprise. Continue Reading
News 23 Jun 2015

Red Hat preview: App performance with container-based systems

As the 2015 Red Hat Summit takes place, attendees are dealing with the fact that container-based systems have changed the game for app performance. Continue Reading
Podcast 15 May 2015

Containerization may mark the decline of virtualization

The popularity of containerization is leaving virtualization in the dust. ZeroTurnaround's Jevgeni Kabanov explains why. Continue Reading
Feature 05 Jan 2014

The server-side trend for 2014? Modular and componentized application servers

With modern applications, the focus is more on the software being developed, and less on the server-side software that manages all of the back-end services. The trend for 2014 and beyond? More modularization and componentization. Continue Reading
Tutorial 03 Jul 2013

Which EJB to use? Stateful, stateless and singleton session beans compared

When developing a service layer, Java architects are often challenged with which of the three session beans, stateful, stateless or singleton, should be used. Continue Reading
News 24 Jun 2013

The JPA 2.0 EntityManager vs. the Hibernate Session: Which one to use?

The question for data persistence experts using JPA 2.0 is whether they should be using the EntityManager or the Hibernate Session from JBoss for ORM. Continue Reading
Feature 06 Feb 2013

Contrasting distributed computing with concurrent programming:

In many ways, concurrent programming and distributed programming address the same set of programming issues, but there are significant differences between the two, and architects and developers need to understand the difference. Continue Reading
Feature 30 May 2012

Java EE 7 migration: Risk mitigation strategies

Some enterprise Java shops are weighing the risks of a migration to Java EE 7 against the potential benefits, which are incremental and cloud focused. Continue Reading
News 16 Aug 2004

Using a BLOB data type in a CMP Enity Bean

I got an email from a customer who wanted to use BLOB data type in their CMP entity bean. In this blog, I will provide an example and will discuss how can you develop your CMP EJBs to use a BLOB database type. Continue Reading
News 01 Jan 2000

Message Driven Beans Tutorial

The following tutorial illustrates how a Message Driven Bean is written and deployed in an Enterprise JavaBeansTM 2.0 Container. The MDB component is invoked by an inbound message from a Java client. Continue Reading