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

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 Payara Micro version of the manifest.json for CloudEE Duke is listed below.

{
    "runtime": {
        "majorVersion": "8"
    },
    "command": "java -jar cloudee-duke-microbundle.jar --port $PORT",
    "release": {
        "version": "1.0",
        "build": "1",
        "commit": "123"
    },
    "notes": "Dukes says hello from Payara"
}

You need to specify the port for Payara Micro in the startup command. This is done by using the $PORT environment variable.

The über-jar is produced by using the Payara Micro Maven Plugin:

<plugin>
    <groupId>fish.payara.maven.plugins</groupId>
    <artifactId>payara-micro-maven-plugin</artifactId>
    <version>1.0.1-SNAPSHOT</version>
    <executions>
        <execution>
            <goals>
                <goal>bundle</goal>
            </goals>
        </execution>
    </executions>
    <configuration>
        <payaraVersion>${version.payara.micro}</payaraVersion>
        <autoDeployEmptyContextRoot>true</autoDeployEmptyContextRoot>
    </configuration>
</plugin>                

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

mvn clean package payara-micro:bundle assembly:single -Ppayara

This will produce a file called cloudee-duke-oracle-payara.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

https://<dependsonyouraccount>.oraclecloud.com/hello
Duke says Hello!

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

https://<dependsonyouraccount>.oraclecloud.com/health
{
outcome: “UP”,
checks: [ ]
}

https://<dependsonyouraccount>.oraclecloud.com/metrics
# TYPE vendor:system_cpu_load gauge
# HELP vendor:system_cpu_load Display the “recent cpu usage” for the whole system. This value is a double in the [0.0,1.0] interval. A value of 0.0 means that all CPUs were idle during the recent period of time observed, while a value of 1.0 means that all CPUs were actively running 100% of the time during the recent period being observed. All values betweens 0.0 and 1.0 are possible depending of the activities going on in the system. If the system recent cpu usage is not available, the method returns a negative value.
vendor:system_cpu_load 0.005405405405405406
…