A simple application using JMS for messaging. It listens on a queue for text messages, reads and modifies the text, and then sends it to another queue. All properties of the request message are copied to the response message.
Start the application like this:
java -jar worker-jar-with-dependencies.jar worker.properties
If no properties file is given, worker.properties is used as default.
The application can connect to ActiveMQ as well as to AWS SQS. When using ActiveMQ, the src/main/resource/jndi.properties file may have to be adapted. When using SQS, you have to provide your API credentials in a file named aws.properties. Please note that the application currently only works with the eu-west-1 region.
Note: Do not rename aws.properties.example to aws.properties but rather create a new file named aws.properties instead.
Otherwise, Git will no longer ignore the file, possibly resulting in your AWS credentials being committed and pushed and available to everyone.
Worker can be configured with different names and that names then show up in the modified text (which is very useful for debugging as you can easily identify which worker processed your message). For running two worker with different names on the same SQS queues, the two example files worker1.properties and worker2.properties are given. They assume that the Queues TextProcessorRequests and TextProcessorResponses have already been created using the AWS console.