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#! /usr/bin/env python3
# Test of task cancellation in Python.
# Submit 10 tasks that sleep for 10 seconds.
# After 3 seconds, cancel all of them.
# Wait for task return and verify that status was cancelled.
import sys
import ndcctools.taskvine as vine
ntasks = 10
ntasks_cancelled = 0
port_file = None
try:
port_file = sys.argv[1]
except IndexError:
sys.stderr.write("Usage: {} PORTFILE\n".format(sys.argv[0]))
raise
q = vine.Manager(port=0)
with open(port_file, "w") as f:
print("Writing port {port} to file {file}".format(port=q.port, file=port_file))
f.write(str(q.port))
print("Submitting {} tasks...".format(ntasks))
for i in range(0,ntasks):
t = vine.Task("sleep 10")
t.set_cores(1)
q.submit(t)
print("Waiting for tasks to start...".format(ntasks))
t = q.wait(3)
print("Cancelling all tasks...")
q.cancel_all()
print("Collecting cancelled tasks...")
while not q.empty():
t = q.wait(10)
if t:
print("Task {} completed with status {}".format(t.id,t.result))
if t.result=="cancelled":
ntasks_cancelled+=1
if ntasks_cancelled==ntasks:
print("Success: {} of {} tasks cancelled\n".format(ntasks_cancelled,ntasks))
sys.exit(0)
else:
print("Failure: {} of {} tasks cancelled\n".format(ntasks_cancelled,ntasks))
sys.exit(1)
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