What is the goal of the Active object pattern? Can you show me any abstract example to understand it easily?
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The Active object pattern's goal is to separate the method calling from method execution. It is like a waiter in a restaurant, who just hands the orders from the customers to the chef.
When a customer orders some food from the waiter
he writes it up on a paper (obviously doesn't start to cook it),
gives the paper to the chef, who decides which cook should prepare it (who has time).
When the meal is ready, the cook places it on the serve bar and the waiter brings it to the customers table.