How queues act when duplicated items?

[mmoreram]

Possibility to define a queue with unique elements.

If defined as unique, all inserted elements will be inserted only if they are not inserted.

Only valid where queues are used as Consumer/Producer model

Also could be nice to define how queue must act in this case

• Delete existent item, and push it again.
• Avoid current push

[mmoreram]

Queues configuration need to be refactored, to allow for adding new queue configuration, beyonn queue namealias