Create a worker for development

[bakura10]

Currently, ZfrEbWorker makes it very easy to work with Beanstalk worker, but it does not have any way to easily pull messages locally for development.

I'd suggest that we add a CLI command - maybe Symfony CLI ? - (ideally that could be launched using something like "composer eb-worker", although I'm not sure about how to do that).

It should accept two options:

• server: the server to push messages from (it will likely be "localhost" or the IP of the local Docker container)
• queue: the queue name

So it would be launched like this: composer eb-worker --server localhost:8000 --queue my-sqs-queue

The command will:

• Call the getQueueUrl to get the complete queue URL (https://docs.aws.amazon.com/aws-sdk-php/v3/api/api-sqs-2012-11-05.html#getqueueurl)
• Call the receiveMessage (https://docs.aws.amazon.com/aws-sdk-php/v3/api/api-sqs-2012-11-05.html#receivemessage) and push each message to the specified URL + "/internal/worker" (as this is the default route for EbWorker).

We can introduce GuzzleHttp dependency as a dev-dependancy to make the HTTP call. We must make sure to add all the required headers that Beanstalk add by default (http://docs.aws.amazon.com/elasticbeanstalk/latest/dg/using-features-managing-env-tiers.html#worker-environ).

@danizord could you do that one?

[bakura10]

For reference about how we could use that: https://xtreamwayz.com/blog/2016-02-07-zend-expressive-console-cli-commands

[bakura10]

I'm taking it :).

[bakura10]

Addressed by https://github.com/zf-fr/zfr-eb-worker/pull/20