August 2018
Intermediate to advanced
380 pages
10h 2m
English
Content preview from Mastering Functional Programming
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Heavy load with blocking
Now, imagine that our taskHeavy is a handler for an HTTP server. The server is undergoing a heavy load and has 1000 ongoing requests. This means that we need to create 1000 tasks to handle them. With the bunch method, we can define such handling as follows:
(IO.shift *> bunch(1000)(taskHeavy)).unsafeRunSync
Notice that we have encountered another new primitive in this example. It is a shift method that's defined on the IO data type. It is defined as follows:
The shift method is an instruction for the execution to get shifted to an ExecutionContext, which is present as an implicit dependency in scope. Here, we implicitly ...
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