Thorntail Messaging Work Queue Example

Purpose

This example demonstrates how to dispatch tasks to a scalable set of worker processes using a message queue. It uses the AMQP 1.0 message protocol to send and receive messages.

Prerequisites

• Log into an OpenShift cluster of your choice: oc login ....
• Select a project in which the services will be deployed: oc project ....

Modules

The frontend module serves the web interface and communicates with workers in the backend.

The worker module implements the worker service in the backend.

Deployment

Run the following commands to configure and deploy the applications.

Deployment using S2I

oc apply -f ./frontend/.openshiftio/service.amq.yaml

oc apply -f ./frontend/.openshiftio/application.yaml
oc new-app --template=thorntail-messaging-work-queue-frontend

oc apply -f ./worker/.openshiftio/application.yaml
oc new-app --template=thorntail-messaging-work-queue-worker

Deployment with the JKube OpenShift Maven Plugin

oc apply -f ./frontend/.openshiftio/service.amq.yaml

mvn clean oc:deploy -Popenshift

Test everything

This is completely self-contained and doesn't require the application to be deployed in advance. Note that this may delete anything and everything in the OpenShift project.

mvn clean verify -Popenshift,openshift-it