| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, |
| # software distributed under the License is distributed on an |
| # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| # KIND, either express or implied. See the License for the |
| # specific language governing permissions and limitations |
| # under the License. |
| |
| # module to provide a thread timeout monitor |
| # by Alexey Tumanov and Michael Stroucken |
| |
| import threading |
| |
| class TimeoutException(Exception): |
| def __init__(self, string): |
| Exception.__init__(self,'Timeout: %s' % string) |
| |
| class TimeoutThread: |
| def __init__(self, function, args = (), kwargs = {}): |
| self.cv = threading.Condition() |
| self.function = function |
| self.args = args |
| self.kwargs = kwargs |
| self.finished = False |
| self.rval = None |
| |
| def wait(self, timeout=None): |
| self.cv.acquire() |
| if not self.finished: |
| if timeout: |
| self.cv.wait(timeout) |
| else: |
| self.cv.wait() |
| finished = self.finished |
| rval = self.rval |
| self.cv.release() |
| |
| # |
| # Raise an exception if a timeout occurred. |
| # |
| if finished: |
| return rval |
| else: # NOTE: timeout must be set for this to be true. |
| raise TimeoutException("function %s timed out after %f seconds" % (str(self.function), timeout)) |
| |
| def run(self): |
| try: |
| rval = self.function(*self.args, **self.kwargs) |
| except Exception, e: |
| rval = e |
| |
| self.cv.acquire() |
| self.finished = True |
| self.rval = rval |
| self.cv.notify() |
| self.cv.release() |
| |