Spring-Boot Camel-Drools QuickStart

This example demonstrates how you can use Apache Camel to integrate a Spring-Boot application running on Kubernetes or OpenShift with a remote Kie Server.

Kie Server Configuration

The Kie Server should be deployed before running the application and the classic hellorule example should be installed and activated. The example is based on the Person and Greeting facts. The Camel route will periodically add a Person fact into the remote knowledge base and retrieve a Greeting created by the rule.

The hellorule example is installed by default into the Openshift Decision Server xPaaS Image when using the decisionserver63-basic-s2i template with the default configuration (the hellorule source code is contained in the default git repository used by the template). If the Decision Server xPaaS image is used, access to the rest API is restricted to authenticated users, so the same username and password combination chosen in the Decision Server xPaaS template must be used in the configuration of the current this quickstart.

Quickstart Configuration

Username and password as well as the service name of the Kie Server for the current quickstart can be set in the application.properties file (especially when running this quickstart using the fabric8-maven-plugin) or from the Openshift creation wizard when the S2I template is used.

Configuration through the application.properties file can also be useful when running the quickstart locally.

Building

The example can be built with

mvn clean install

Running the example locally

The example can be run locally using the following Maven goal:

mvn spring-boot:run

Running the example on Kubernetes

It is assumed a running Kubernetes platform is already running. If not you can find details how to get started.

Assuming your current shell is connected to Kubernetes or OpenShift so that you can type a command like

kubectl get pods

or for OpenShift

oc get pods

Then the following command will package your app and run it on Kubernetes:

mvn fabric8:run

To list all the running pods:

oc get pods

Then find the name of the pod that runs this quickstart, and output the logs from the running pods with:

oc logs <name of pod>

You can also use the fabric8 developer console to manage the running pods, and view logs and much more.

More details

You can find more details about running this quickstart on the website. This also includes instructions how to change the Docker image user and registry.