Add configuration options for consumer subscribing to a queue #402
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…ner service engine
Addition to fix jondot#417 Update DemoMiddleware to return worker result for property handling
We already have it as runtime dependency
Previously Sneakers was able to handle StandardError and ScriptError exceptions and their descendants. But there are more exceptions that could cause problems. * SystemStackError (stack level too deep) * NoMemoryError * custom descendants of Exception (e.g. declared by gems) In case of these exceptions, the handler is unable to report job state to the RabbitMQ. RabbitMQ keeps sending new jobs to the Sneakers until prefetch value reached. It makes Sneakers worker hang without processing any new message.
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When a worker subscribes to a queue only two configuration options were used
:block(hardcoded) and:ack(configurable using:ackoption). Setting other consumer configuration options such as consumer priorities or exclusive consumers was not possible.Creating new
consumer_optionsconfiguration options block resolves that and all configured consumer options are directly passed toqueue.subscribe(in more general way than pull request for exclusive consumers) while original defaults are kept as new defaults. The approach is similar toexchange_optionsandqueue_optionswhich are already in codebase. Old:ackconfiguration option becomes deprecated, but is mapped via deprecated options mapping.