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Java 9 Concurrency Cookbook, Second Edition
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The Phaser
class provides a method that is executed each time phaser
changes the phase. It's the onAdvance()
method. It receives two parameters: the number of the current phases and the number of registered participants. It returns a Boolean value false
if Phaser
continues its execution or the value true
if Phaser
has finished and has to enter the termination state.
The default implementation of this method returns true
if the number of registered participants is zero, and false
otherwise. But you can modify this behavior if you extend the Phaser
class and override this method. Normally, you will be interested in doing this when you have to execute some actions when you advance from one phase to the next.
In this recipe, you will learn how to control phase change in a phaser that is implementing your own version of the Phaser
class that overrides the onAdvance()
method to execute some actions in every phase change. You are going to implement...