Spring-Boot Camel QuickStart

This example demonstrates how you can use Apache Camel with Spring Boot based on a 'fabric8 Java base image'.

The quickstart uses Spring Boot to configure a little application that includes a Camel route that triggers a message every 5th second, and routes the message to a log.

The application utilizes the Spring @ImportResource annotation to load a Camel Context definition via a src/main/resources/spring/camel-context.xml file on the classpath.

Important

This quickstart can run in 2 modes: standalone on your machine and on Kubernetes / OpenShift Cluster. Quickstart requires Java 8 or Java 11 (fuse-java-openshift-jdk11-rhel8 image is used to build in Java 11).

Deployment options

You can run this quickstart in the following modes:

• Kubernetes / Single-node OpenShift cluster

• Standalone on your machine

The most effective way to run this quickstart is to deploy and run the project on OpenShift.

For more details about running this quickstart on a single-node OpenShift cluster, CI/CD deployments, as well as the rest of the runtime, see the Spring Boot Runtime Guide.

Running the Quickstart on a single-node Kubernetes/OpenShift cluster

Important

You need to run this example on Container Development Kit 3.3 or OpenShift 3.7. Both of these products have suitable Fuse images pre-installed. If you run it in an environment where those images are not preinstalled follow the steps described in Running the Quickstart on a single-node Kubernetes/OpenShift cluster without preinstalled images.

A single-node Kubernetes/OpenShift cluster provides you with access to a cloud environment that is similar to a production environment.

If you have a single-node Kubernetes/OpenShift cluster, such as Minishift or the Red Hat Container Development Kit, installed and running, you can deploy your quickstart there.

1. Log in to your OpenShift cluster:

   $ oc login -u developer -p developer

2. Create a new OpenShift project for the quickstart:

   $ oc new-project MY_PROJECT_NAME

3. Change the directory to the folder that contains the extracted quickstart application (for example, my_openshift/spring-boot-camel) :

   or

   $ cd my_openshift/spring-boot-camel

4. Build and deploy the project to the OpenShift cluster:

   $ mvn clean -DskipTests oc:deploy -Popenshift

5. In your browser, navigate to the MY_PROJECT_NAME project in the OpenShift console. Wait until you can see that the pod for the spring-boot-camel has started up.

6. On the project’s Overview page, navigate to the details page deployment of the spring-boot-camel application: https://OPENSHIFT_IP_ADDR:8443/console/project/MY_PROJECT_NAME/browse/rc/spring-boot-camel-NUMBER_OF_DEPLOYMENT?tab=details.

7. Switch to tab Logs and then see the messages sent by Camel.

Running the Quickstart on a single-node Kubernetes/OpenShift cluster without preinstalled images

A single-node Kubernetes/OpenShift cluster provides you with access to a cloud environment that is similar to a production environment.

If you have a single-node Kubernetes/OpenShift cluster, such as Minishift or the Red Hat Container Development Kit, installed and running, you can deploy your quickstart there.

1. Log in to your OpenShift cluster:

   $ oc login -u developer -p developer

2. Create a new OpenShift project for the quickstart:

   $ oc new-project MY_PROJECT_NAME

3. Configure Red Hat Container Registry authentication (if it is not configured). Follow documentation.

4. Import base images in your newly created project (MY_PROJECT_NAME):

   $ oc import-image fuse-java-openshift:1.13 --from=registry.redhat.io/fuse7/fuse-java-openshift-rhel8:1.13 --confirm

5. Change the directory to the folder that contains the extracted quickstart application (for example, my_openshift/spring-boot-camel) :

   or

   $ cd my_openshift/spring-boot-camel

6. Build and deploy the project to the OpenShift cluster:

   $ mvn clean -DskipTests oc:deploy -Popenshift -Djkube.generator.fromMode=istag -Djkube.generator.from=MY_PROJECT_NAME/fuse-java-openshift:1.13

7. In your browser, navigate to the MY_PROJECT_NAME project in the OpenShift console. Wait until you can see that the pod for the spring-boot-camel has started up.

8. On the project’s Overview page, navigate to the details page deployment of the spring-boot-camel application: https://OPENSHIFT_IP_ADDR:8443/console/project/MY_PROJECT_NAME/browse/pods/spring-boot-camel-xml-NUMBER_OF_DEPLOYMENT?tab=details.

9. Switch to tab Logs and then see the messages sent by Camel.

Integration Testing

The example includes a Kubernetes Integration Test. Once the container image has been built and deployed in Kubernetes, the integration test can be run with:

mvn test -Dtest=*KT

The test is disabled by default and has to be enabled using -Dtest.

Running the quickstart standalone on your machine

To run this quickstart as a standalone project on your local machine:

1. Download the project and extract the archive on your local filesystem.

2. Build the project:

   $ cd PROJECT_DIR
   $ mvn clean package

3. Run the service:

   $ mvn spring-boot:run

4. See the messages sent by Camel.