utils.py 3.01 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
# Copyright (C) 2012, 2013 GRNET S.A. All rights reserved.
#
# Redistribution and use in source and binary forms, with or
# without modification, are permitted provided that the following
# conditions are met:
#
#   1. Redistributions of source code must retain the above
#      copyright notice, this list of conditions and the following
#      disclaimer.
#
#   2. Redistributions in binary form must reproduce the above
#      copyright notice, this list of conditions and the following
#      disclaimer in the documentation and/or other materials
#      provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
# The views and conclusions contained in the software and
# documentation are those of the authors and should not be
# interpreted as representing official policies, either expressed
# or implied, of GRNET S.A.

34 35
from httplib import HTTPConnection, HTTPSConnection
from contextlib import closing
36

37
from objpool.http import PooledHTTPConnection
38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62
from astakosclient.errors import AstakosClientException


def retry(func):
    def decorator(self, *args, **kwargs):
        attemps = 0
        while True:
            try:
                return func(self, *args, **kwargs)
            except AstakosClientException as err:
                is_last_attempt = attemps == self.retry
                if is_last_attempt:
                    raise err
                if err.status == 401 or err.status == 404:
                    # In case of Unauthorized response
                    # or Not Found return immediately
                    raise err
                self.logger.info("AstakosClient request failed..retrying")
                attemps += 1
    return decorator


def scheme_to_class(scheme, use_pool, pool_size):
    """Return the appropriate conn class for given scheme"""
    def _objpool(netloc):
63
        return PooledHTTPConnection(
64
            netloc=netloc, scheme=scheme, size=pool_size)
65

66 67 68 69 70 71
    def _http_connection(netloc):
        return closing(HTTPConnection(netloc))

    def _https_connection(netloc):
        return closing(HTTPSConnection(netloc))

72 73 74 75
    if scheme == "http":
        if use_pool:
            return _objpool
        else:
76
            return _http_connection
77 78 79 80
    elif scheme == "https":
        if use_pool:
            return _objpool
        else:
81
            return _https_connection
82 83
    else:
        return None