WildFly Swarm on Oracle Application Container Cloud


In this blog post, I will describe how to deploy the CloudEE Duke application packaged in a WildFly Swarm über-jar to Oracle Application Container Cloud.

Über-jar approach

The deployment artifact required for deployment in Oracle Application Container Cloud is a ZIP archive containing the application über-jar and a manifest file (manifest.json). The WildFly Swarm version of the manifest.json for CloudEE Duke is listed below.

You need to specify the port and host for WildFly Swarm in the startup command. This is done by using the $PORT and $HOSTNAME environment variables.

The über-jar is produced by using the WildFly Swarm Maven Plugin:

Hollow-jar approach

It is also possible to package the CloudEE Duke application as a hollow-jar using the WildFly Swarm Maven Plugin:

The command configuration in the manifest.json needs to be updated accordingly:

When using the hollow-jar approach, you will need to package both the hollow-jar and the application-war in the zip file together with the manifest.json file.

See the complete pom.xml for an example on how to produce the deployable ZIP archive with the maven command:

This will produce a file called cloudee-duke-oracle-swarm.zip  in the target folder. This is the ZIP archive you will deploy to Oracle Application Container Cloud as shown in the screenshot below.

When your application is deployed, you should be able to access the hello endpoint

Duke says Hello!

You will also have the health and metrics endpoints provided by the MicroProfile implementation

outcome: “UP”,
checks: [ ]

# HELP base:classloader_total_loaded_class_count Displays the total number of classes that have been loaded since the Java virtual machine has started execution.
# TYPE base:classloader_total_loaded_class_count counter
base:classloader_total_loaded_class_count 14170.0

Running Eclipse MicroProfile on Oracle Cloud

Since I joined the Oracle Developer Champions, I have played around with running MicroProfile applications on Oracle Cloud. Specifically the Oracle Application Container Cloud which allows you to run applications on platforms such as Java™ SE, Java™ EE, Node.js, PHP, Python, Ruby, .NET Core or Go.

MicroProfile is based on Java EE technologies, so the core functionality of the service will run fine on the Java™ EE platform offered. But since WebLogic does not implement the MicroProfile APIs, such as Config, Health Check, Metrics, etc., running on the Java™ SE platform is a much better option.

I have created a simple application called CloudEE Duke to show the differences in configuration required for the various MicroProfile implementations in order to run them on Oracle Application Container Cloud. So far I have covered WildFly Swarm, Payara Micro, Liberty and Kumuluz EE. More may follow. I plan to describe each of them in a series of blog posts following this one. I will update the list below with links to the posts as soon as they are written.

WildFly Swarm on Oracle Application Container Cloud
Payara Micro on Oracle Application Container Cloud
Liberty on Oracle Application Container Cloud
Kumuluz EE on Oracle Application Container Cloud

My plan is to create similar blog series for the other cloud providers as well.

Flying High with Oracle Cloud

I recently joined the Oracle Developer Champion Program, and one of the benefits is that I get free credits to try out the various services offered by Oracle Cloud. As you see in the picture below, the credits just poured down on me yesterday 🙂

Will this hurt my reputation of being unbiased and vendor neutral when I talk about technologies?

Well, I certainly hope not! In that case, it should probably have gone long time ago since I already get free credits from other vendors, such as AWS, Microsoft Azure, Google, and more. The way I see it, is that it is an excellent opportunity to try out the different solutions and give them a fair comparison.

Stay tuned for more…


JavaZone 2017

I am very happy to be back at JavaZone in Oslo this year with a talk called MicroProfile – by Example. In this talk, I will describe the history and reasoning behind the Eclipse MicroProfile initiative, provide code samples and strategies for using all implementations and also introduce the newest addition to MicroProfile – MicroProfile Config.

Of course, there will be lots of demo and code…