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# -------------------------------------------------------------------------
# Copyright (c) 2020 AT&T Intellectual Property
#
# 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
import traceback
from flask import Flask
from flask import g
from flask import Response
import mysql.connector
from osdf.config.base import osdf_config
from osdf.logging.osdf_logging import debug_log
from osdf.logging.osdf_logging import error_log
from osdf.operation.exceptions import BusinessException
from osdf.utils.data_conversion import decode_data
def init_db():
if is_db_enabled():
get_db()
def get_db():
"""Opens a new database connection if there is none yet for the current application context.
"""
if not hasattr(g, 'pg'):
properties = osdf_config['deployment']
host, db_port, db = properties["osdfDatabaseHost"], properties["osdfDatabasePort"], properties.get(
"osdfDatabaseSchema")
user, password = properties["osdfDatabaseUsername"], properties["osdfDatabasePassword"]
g.pg = mysql.connector.connect(host=host, port=db_port, user=user, password=password, database=db)
return g.pg
def close_db():
"""Closes the database again at the end of the request.
"""
if hasattr(g, 'pg'):
g.pg.close()
app = Flask(__name__)
def create_model_data(model_api):
with app.app_context():
try:
model_info = model_api['modelInfo']
model_id = model_info['modelId']
debug_log.debug(
"persisting model_api {}".format(model_id))
connection = get_db()
cursor = connection.cursor(buffered=True)
query = "SELECT model_id FROM optim_model_data WHERE model_id = %s"
values = (model_id,)
cursor.execute(query, values)
if cursor.fetchone() is None:
query = "INSERT INTO optim_model_data (model_id, model_content, description, solver_type) VALUES " \
"(%s, %s, %s, %s)"
values = (model_id, model_info['modelContent'], model_info.get('description'), model_info['solver'])
cursor.execute(query, values)
g.pg.commit()
debug_log.debug("A record successfully inserted for request_id: {}".format(model_id))
return retrieve_model_data(model_id)
close_db()
else:
query = "UPDATE optim_model_data SET model_content = %s, description = %s, solver_type = %s where " \
"model_id = %s "
values = (model_info['modelContent'], model_info.get('description'), model_info['solver'], model_id)
cursor.execute(query, values)
g.pg.commit()
return retrieve_model_data(model_id)
close_db()
except Exception as err:
error_log.error("error for request_id: {} - {}".format(model_id, traceback.format_exc()))
close_db()
raise BusinessException(err)
def retrieve_model_data(model_id):
status, resp_data = get_model_data(model_id)
if status == 200:
resp = json.dumps(build_model_dict(resp_data))
return build_response(resp, status)
else:
resp = json.dumps({
'modelId': model_id,
'statusMessage': "Error retrieving the model data for model {} due to {}".format(model_id, resp_data)
})
return build_response(resp, status)
def build_model_dict(resp_data, content_needed=True):
resp = {'modelId': resp_data[0], 'description': resp_data[2] if resp_data[2] else '',
'solver': resp_data[3]}
if content_needed:
resp.update({'modelContent': decode_data(resp_data[1])})
return resp
def build_response(resp, status):
response = Response(resp, content_type='application/json; charset=utf-8')
response.headers.add('content-length', len(resp))
response.status_code = status
return response
def delete_model_data(model_id):
with app.app_context():
try:
debug_log.debug("deleting model data given model_id = {}".format(model_id))
connection = get_db()
cursor = connection.cursor(buffered=True)
query = "delete from optim_model_data WHERE model_id = %s"
values = (model_id,)
cursor.execute(query, values)
g.pg.commit()
close_db()
resp = {
"statusMessage": "model data for modelId {} deleted".format(model_id)
}
return build_response(json.dumps(resp), 200)
except Exception as err:
error_log.error("error deleting model_id: {} - {}".format(model_id, traceback.format_exc()))
close_db()
raise BusinessException(err)
def get_model_data(model_id):
with app.app_context():
try:
debug_log.debug("getting model data given model_id = {}".format(model_id))
d = dict()
connection = get_db()
cursor = connection.cursor(buffered=True)
query = "SELECT model_id, model_content, description, " \
"solver_type FROM optim_model_data WHERE model_id = %s"
values = (model_id,)
cursor.execute(query, values)
if cursor is None:
return 400, "FAILED"
else:
rows = cursor.fetchone()
if rows is not None:
index = 0
for row in rows:
d[index] = row
index = index + 1
return 200, d
else:
close_db()
return 500, "NOT_FOUND"
except Exception:
error_log.error("error for request_id: {} - {}".format(model_id, traceback.format_exc()))
close_db()
return 500, "FAILED"
def retrieve_all_models():
status, resp_data = get_all_models()
model_list = []
if status == 200:
for r in resp_data:
model_list.append(build_model_dict(r, False))
resp = json.dumps(model_list)
return build_response(resp, status)
else:
resp = json.dumps({
'statusMessage': "Error retrieving all the model data due to {}".format(resp_data)
})
return build_response(resp, status)
def get_all_models():
with app.app_context():
try:
debug_log.debug("getting all model data".format())
connection = get_db()
cursor = connection.cursor(buffered=True)
query = "SELECT model_id, model_content, description, solver_type FROM optim_model_data"
cursor.execute(query)
if cursor is None:
return 400, "FAILED"
else:
rows = cursor.fetchall()
if rows is not None:
return 200, rows
else:
close_db()
return 500, "NOT_FOUND"
except Exception:
error_log.error("error for request_id: {}".format(traceback.format_exc()))
close_db()
return 500, "FAILED"
def is_db_enabled():
return osdf_config['deployment'].get('isDatabaseEnabled', False)
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