52 lines
2.0 KiB
Python
52 lines
2.0 KiB
Python
import structio
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from nested_pool_inner_raises import successful, failing
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async def main_cancel(i):
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print("[main] Parent is alive, spawning child")
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t = structio.clock()
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async with structio.create_pool() as pool:
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task: structio.Task = pool.spawn(successful, "test", i * 2)
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print(f"[main] Child spawned, waiting {i} seconds before canceling it")
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await structio.sleep(i)
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print("[main] Cancelling child")
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# Tasks can be cancelled individually, if necessary
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task.cancel()
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print(f"[main] Exited in {structio.clock() - t:.2f} seconds")
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async def main_wait_successful(i):
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print("[main] Parent is alive, spawning (and explicitly waiting for) child")
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t = structio.clock()
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async with structio.create_pool() as pool:
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# The spawn() method returns a Task object that can be
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# independently managed if necessary. Awaiting the Task
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# will wait for it to complete and return its return value,
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# as well as propagate any exceptions it may raise. Note that
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# in this example we could've just awaited the coroutine directly,
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# so it's a bad show for the feature, but you could theoretically
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# pass the object around somewhere else and do the awaiting there
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print(f"[main] Child has returned: {await pool.spawn(successful, 'test', i)}")
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print(f"[main] Exited in {structio.clock() - t:.2f} seconds")
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async def main_wait_failing(i):
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print("[main] Parent is alive, spawning (and explicitly waiting for) child")
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t = structio.clock()
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try:
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async with structio.create_pool() as pool:
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# This never completes
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await pool.spawn(failing, "test", i)
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print("This is never executed")
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except TypeError:
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print(f"[main] TypeError caught!")
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print(f"[main] Exited in {structio.clock() - t:.2f} seconds")
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# Total time should be about 15s
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structio.run(main_cancel, 5)
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structio.run(main_wait_successful, 5)
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structio.run(main_wait_failing, 5)
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