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
34
35
36
37
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
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
|
# -------------------------------------------------------------------------
# Copyright (c) 2015-2017 AT&T Intellectual Property
# Copyright (C) 2020 Wipro Limited.
#
# 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 json
from requests import RequestException
import time
from osdf.adapters.conductor.api_builder import conductor_api_builder
from osdf.logging.osdf_logging import debug_log
from osdf.operation.exceptions import BusinessException
from osdf.utils.interfaces import RestClient
def request(req_info, demands, request_parameters, service_info, template_fields,
osdf_config, flat_policies):
config = osdf_config.deployment
local_config = osdf_config.core
uid, passwd = config['conductorUsername'], config['conductorPassword']
conductor_url = config['conductorUrl']
req_id = req_info["requestId"]
transaction_id = req_info['transactionId']
headers = dict(transaction_id=transaction_id)
placement_ver_enabled = config.get('placementVersioningEnabled', False)
if placement_ver_enabled:
cond_minor_version = config.get('conductorMinorVersion', None)
if cond_minor_version is not None:
x_minor_version = str(cond_minor_version)
headers.update({'X-MinorVersion': x_minor_version})
debug_log.debug("Versions set in HTTP header to "
"conductor: X-MinorVersion: {} ".format(x_minor_version))
max_retries = config.get('conductorMaxRetries', 30)
ping_wait_time = config.get('conductorPingWaitTime', 60)
rc = RestClient(userid=uid, passwd=passwd, method="GET", log_func=debug_log.debug,
headers=headers)
conductor_req_json_str = conductor_api_builder(req_info, demands, request_parameters,
service_info, template_fields, flat_policies,
local_config)
conductor_req_json = json.loads(conductor_req_json_str)
debug_log.debug("Sending first Conductor request for request_id {}".format(req_id))
resp, raw_resp = initial_request_to_conductor(rc, conductor_url, conductor_req_json)
# Very crude way of keeping track of time.
# We are not counting initial request time, first call back, or time for HTTP request
total_time, ctr = 0, 2
client_timeout = req_info['timeout']
configured_timeout = max_retries * ping_wait_time
max_timeout = min(client_timeout, configured_timeout)
while True: # keep requesting conductor till we get a result or we run out of time
if resp is not None:
if resp["plans"][0].get("status") in ["error"]:
raise RequestException(response=raw_resp, request=raw_resp.request)
if resp["plans"][0].get("status") in ["done", "not found", "solved"]:
return resp
new_url = resp['plans'][0]['links'][0][0]['href'] # TODO(krishna): check why a list of lists
if total_time >= max_timeout:
raise BusinessException("Conductor could not provide a solution within {} seconds,"
"this transaction is timing out".format(max_timeout))
time.sleep(ping_wait_time)
ctr += 1
debug_log.debug("Attempt number {} url {}; prior status={}"
.format(ctr, new_url, resp['plans'][0]['status']))
total_time += ping_wait_time
try:
raw_resp = rc.request(new_url, raw_response=True)
resp = raw_resp.json()
except RequestException as e:
debug_log.debug("Conductor attempt {} for request_id {} has failed because {}"
.format(ctr, req_id, str(e)))
def initial_request_to_conductor(rc, conductor_url, conductor_req_json):
"""First steps in the request-redirect chain in making a call to Conductor
:param rc: REST client object for calling conductor
:param conductor_url: conductor's base URL to submit a placement request
:param conductor_req_json: request json object to send to Conductor
:return: URL to check for follow up (similar to redirects);
we keep checking these till we get a result/error
"""
debug_log.debug("Payload to Conductor: {}".format(json.dumps(conductor_req_json)))
raw_resp = rc.request(url=conductor_url, raw_response=True, method="POST",
json=conductor_req_json)
resp = raw_resp.json()
if resp["status"] != "template":
raise RequestException(response=raw_resp, request=raw_resp.request)
time.sleep(10) # 10 seconds wait time to avoid being too quick!
plan_url = resp["links"][0][0]["href"]
debug_log.debug("Attempting to read the plan from "
"the conductor provided url {}".format(plan_url))
raw_resp = rc.request(raw_response=True,
url=plan_url)
resp = raw_resp.json()
if resp["plans"][0]["status"] in ["error"]:
raise RequestException(response=raw_resp, request=raw_resp.request)
return resp, raw_resp # now the caller of this will handle further follow-ups
|
