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from datetime import datetime
import json
import sqlite3
import sys
from mysql.connector.pooling import MySQLConnectionPool
# Get keys from config file
with open(sys.argv[1]) as file:
KEYS = json.load(file)
DATETIME_STRING_FORMAT = '%Y-%m-%dT%H:%M:%S'
CONNECTION_POOL = None
def init_connection_pool(user, password, database, host, port):
global CONNECTION_POOL
CONNECTION_POOL = MySQLConnectionPool(pool_name = "opendcpool", pool_size = 5,
user=user, password=password, database=database, host=host, port=port)
def execute(statement, t):
"""Open a database connection and execute the statement."""
# Connect to the database
connection = CONNECTION_POOL.get_connection()
cursor = connection.cursor()
# Execute the statement
cursor.execute(statement, t)
# Get the id
cursor.execute('SELECT last_insert_id();')
row_id = cursor.fetchone()[0]
# Disconnect from the database
connection.commit()
connection.close()
# Return the id
return row_id
def fetchone(statement, t=None):
"""Open a database connection and return the first row matched by the SELECT statement."""
# Connect to the database
connection = CONNECTION_POOL.get_connection()
cursor = connection.cursor()
# Execute the SELECT statement
if t is not None:
cursor.execute(statement, t)
else:
cursor.execute(statement)
value = cursor.fetchone()
# Disconnect from the database and return
connection.close()
return value
def fetchall(statement, t=None):
"""Open a database connection and return all rows matched by the SELECT statement."""
# Connect to the database
connection = CONNECTION_POOL.get_connection()
cursor = connection.cursor()
# Execute the SELECT statement
if t is not None:
cursor.execute(statement, t)
else:
cursor.execute(statement)
values = cursor.fetchall()
# Disconnect from the database and return
connection.close()
return values
def datetime_to_string(datetime_to_convert):
"""Return a database-compatible string representation of the given datetime object."""
return datetime_to_convert.strftime(DATETIME_STRING_FORMAT)
def string_to_datetime(string_to_convert):
"""Return a datetime corresponding to the given string representation."""
return datetime.strptime(string_to_convert, DATETIME_STRING_FORMAT)
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