import os
import random
import re
+import signal
import socket
import subprocess
import sys
+import time
import six
from flask import jsonify
from oslo_utils import encodeutils
import yardstick
+from yardstick.common import exceptions
+
logger = logging.getLogger(__name__)
logger.setLevel(logging.DEBUG)
p = subprocess.Popen(". %s; env" % env_file, stdout=subprocess.PIPE,
shell=True)
output = p.communicate()[0]
+
+ # sometimes output type would be binary_type, and it don't have splitlines
+ # method, so we need to decode
+ if isinstance(output, six.binary_type):
+ output = encodeutils.safe_decode(output)
env = dict(line.split('=', 1) for line in output.splitlines() if '=' in line)
os.environ.update(env)
return env
class Timer(object):
- def __init__(self):
+ def __init__(self, timeout=None):
super(Timer, self).__init__()
self.start = self.delta = None
+ self._timeout = int(timeout) if timeout else None
+
+ def _timeout_handler(self, *args):
+ raise exceptions.TimerTimeout(timeout=self._timeout)
def __enter__(self):
self.start = datetime.datetime.now()
+ if self._timeout:
+ signal.signal(signal.SIGALRM, self._timeout_handler)
+ signal.alarm(self._timeout)
return self
def __exit__(self, *_):
+ if self._timeout:
+ signal.alarm(0)
self.delta = datetime.datetime.now() - self.start
def __getattr__(self, item):
if e.errno == errno.ENOENT:
return open(os.path.join(task_path, path))
raise
+
+
+def wait_until_true(predicate, timeout=60, sleep=1, exception=None):
+ """Wait until callable predicate is evaluated as True
+
+ :param predicate: (func) callable deciding whether waiting should continue
+ :param timeout: (int) timeout in seconds how long should function wait
+ :param sleep: (int) polling interval for results in seconds
+ :param exception: exception instance to raise on timeout. If None is passed
+ (default) then WaitTimeout exception is raised.
+ """
+ try:
+ with Timer(timeout=timeout):
+ while not predicate():
+ time.sleep(sleep)
+ except exceptions.TimerTimeout:
+ if exception and issubclass(exception, Exception):
+ raise exception # pylint: disable=raising-bad-type
+ raise exceptions.WaitTimeout