diff options
author | Ori Bernstein <ori@eigenstate.org> | 2021-06-14 00:00:37 +0000 |
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committer | Ori Bernstein <ori@eigenstate.org> | 2021-06-14 00:00:37 +0000 |
commit | a73a964e51247ed169d322c725a3a18859f109a3 (patch) | |
tree | 3f752d117274d444bda44e85609aeac1acf313f3 /sys/lib/python/bsddb/dbutils.py | |
parent | e64efe273fcb921a61bf27d33b230c4e64fcd425 (diff) |
python, hg: tow outside the environment.
they've served us well, and can ride off into the sunset.
Diffstat (limited to 'sys/lib/python/bsddb/dbutils.py')
-rw-r--r-- | sys/lib/python/bsddb/dbutils.py | 77 |
1 files changed, 0 insertions, 77 deletions
diff --git a/sys/lib/python/bsddb/dbutils.py b/sys/lib/python/bsddb/dbutils.py deleted file mode 100644 index 6dcfdd5b5..000000000 --- a/sys/lib/python/bsddb/dbutils.py +++ /dev/null @@ -1,77 +0,0 @@ -#------------------------------------------------------------------------ -# -# Copyright (C) 2000 Autonomous Zone Industries -# -# License: This is free software. You may use this software for any -# purpose including modification/redistribution, so long as -# this header remains intact and that you do not claim any -# rights of ownership or authorship of this software. This -# software has been tested, but no warranty is expressed or -# implied. -# -# Author: Gregory P. Smith <greg@electricrain.com> -# -# Note: I don't know how useful this is in reality since when a -# DBLockDeadlockError happens the current transaction is supposed to be -# aborted. If it doesn't then when the operation is attempted again -# the deadlock is still happening... -# --Robin -# -#------------------------------------------------------------------------ - - -# -# import the time.sleep function in a namespace safe way to allow -# "from bsddb.dbutils import *" -# -from time import sleep as _sleep - -import db - -# always sleep at least N seconds between retrys -_deadlock_MinSleepTime = 1.0/128 -# never sleep more than N seconds between retrys -_deadlock_MaxSleepTime = 3.14159 - -# Assign a file object to this for a "sleeping" message to be written to it -# each retry -_deadlock_VerboseFile = None - - -def DeadlockWrap(function, *_args, **_kwargs): - """DeadlockWrap(function, *_args, **_kwargs) - automatically retries - function in case of a database deadlock. - - This is a function intended to be used to wrap database calls such - that they perform retrys with exponentially backing off sleeps in - between when a DBLockDeadlockError exception is raised. - - A 'max_retries' parameter may optionally be passed to prevent it - from retrying forever (in which case the exception will be reraised). - - d = DB(...) - d.open(...) - DeadlockWrap(d.put, "foo", data="bar") # set key "foo" to "bar" - """ - sleeptime = _deadlock_MinSleepTime - max_retries = _kwargs.get('max_retries', -1) - if _kwargs.has_key('max_retries'): - del _kwargs['max_retries'] - while True: - try: - return function(*_args, **_kwargs) - except db.DBLockDeadlockError: - if _deadlock_VerboseFile: - _deadlock_VerboseFile.write( - 'dbutils.DeadlockWrap: sleeping %1.3f\n' % sleeptime) - _sleep(sleeptime) - # exponential backoff in the sleep time - sleeptime *= 2 - if sleeptime > _deadlock_MaxSleepTime: - sleeptime = _deadlock_MaxSleepTime - max_retries -= 1 - if max_retries == -1: - raise - - -#------------------------------------------------------------------------ |