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# Copyright (c) 2013 Red Hat, Inc.
#
# Licensed 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.
import urllib.parse
from stevedore import driver
from zaqarclient import errors as _errors
def get_transport(transport='http', version=2, options=None):
"""Gets a transport and returns it.
:param transport: Transport name.
Default: http
:type transport: str
:param version: Version of the target transport.
Default: 2
:type version: int
:returns: A `Transport` instance.
:rtype: `zaqarclient.transport.Transport`
"""
entry_point = '{0}.v{1}'.format(transport, version)
try:
namespace = 'zaqarclient.transport'
mgr = driver.DriverManager(namespace,
entry_point,
invoke_on_load=True,
invoke_args=[options])
except RuntimeError as ex:
raise _errors.DriverLoadFailure(entry_point, ex)
return mgr.driver
def get_transport_for(url_or_request, version=2, options=None):
"""Gets a transport for a given url.
An example transport URL might be::
zmq://example.org:8888/v2/
:param url_or_request: a transport URL
:type url_or_request: str or
`zaqarclient.transport.request.Request`
:param version: Version of the target transport.
Default: 2
:type version: int
:returns: A `Transport` instance.
:rtype: `zaqarclient.transport.Transport`
"""
url = url_or_request
if not isinstance(url_or_request, str):
url = url_or_request.endpoint
parsed = urllib.parse.urlparse(url)
return get_transport(parsed.scheme, version, options)
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