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ExecutorService interop
Learn ExecutorService interop in Groovy through a focused explanation, a dedicated topic-specific example, an engineering boundary, and a mastery check.
ExecutorService interop is a focused Groovy lesson inside Concurrency Testing Build. The example uses the construct named in the lesson directly rather than reusing a generic placeholder.
Trace the example from its inputs through ExecutorService interop and identify the behavior that would change if that construct were removed or replaced. Pay attention to the language-specific rules shown by the syntax, because neighboring lessons intentionally exercise different mechanisms.
Topic-specific example
def sample75 = [75, 76, 77]
println sample75.sum() // ExecutorService interop
For ExecutorService interop, test one realistic boundary: empty data, invalid input, unavailable resources, lifetime/cleanup, type constraints, or concurrency timing where applicable. A successful happy path is not enough to prove the construct is used correctly.