Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/galaxy/tool_util/verify/wait.py @ 0:4f3585e2f14b draft default tip
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
author | shellac |
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date | Mon, 22 Mar 2021 18:12:50 +0000 |
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1 """Abstraction for waiting on API conditions to become true.""" |
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2 |
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3 import time |
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4 |
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5 DEFAULT_POLLING_BACKOFF = 0 |
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6 DEFAULT_POLLING_DELTA = 0.25 |
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7 |
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8 TIMEOUT_MESSAGE_TEMPLATE = "Timed out after {} seconds waiting on {}." |
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9 |
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10 |
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11 def wait_on(function, desc, timeout, delta=DEFAULT_POLLING_DELTA, polling_backoff=DEFAULT_POLLING_BACKOFF, sleep_=None): |
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12 """Wait for function to return non-None value. |
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13 |
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14 Grow the polling interval (initially ``delta`` defaulting to 0.25 seconds) |
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15 incrementally by the supplied ``polling_backoff`` (defaulting to 0). |
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16 |
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17 Throw a TimeoutAssertionError if the supplied timeout is reached without |
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18 supplied function ever returning a non-None value. |
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19 """ |
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20 sleep = sleep_ or time.sleep |
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21 total_wait = 0 |
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22 while True: |
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23 if total_wait > timeout: |
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24 raise TimeoutAssertionError(TIMEOUT_MESSAGE_TEMPLATE.format(total_wait, desc)) |
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25 value = function() |
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26 if value is not None: |
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27 return value |
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28 total_wait += delta |
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29 sleep(delta) |
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30 delta += polling_backoff |
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31 |
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32 |
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33 class TimeoutAssertionError(AssertionError): |
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34 """Derivative of AssertionError indicating wait_on exceeded max time.""" |
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35 |
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36 def __init__(self, message): |
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37 super().__init__(message) |