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aceb1b2 | 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 | """
Database connection management for Potato annotation platform.
This module provides connection pooling and management for MySQL database operations.
"""
import mysql.connector
from mysql.connector import pooling
import logging
from contextlib import contextmanager
from typing import Optional, Dict, Any
logger = logging.getLogger(__name__)
class DatabaseManager:
"""
Manages database connections and provides connection pooling for MySQL.
This class handles the creation and management of database connections,
including connection pooling for better performance and resource management.
"""
def __init__(self, config: Dict[str, Any]):
"""
Initialize the database manager with configuration.
Args:
config: Configuration dictionary containing database settings
"""
self.config = config
self.pool = None
self._create_connection_pool()
def _create_connection_pool(self):
"""Create the MySQL connection pool."""
db_config = self.config.get('database', {})
# Validate required database configuration
required_fields = ['host', 'database', 'username', 'password']
for field in required_fields:
if field not in db_config:
raise ValueError(f"Missing required database field: {field}")
pool_config = {
'host': db_config.get('host', 'localhost'),
'port': db_config.get('port', 3306),
'database': db_config['database'],
'user': db_config['username'],
'password': db_config['password'],
'charset': db_config.get('charset', 'utf8mb4'),
'pool_name': 'potato_pool',
'pool_size': db_config.get('pool_size', 10),
'pool_reset_session': True,
'autocommit': False, # We'll handle transactions explicitly
'raise_on_warnings': True
}
try:
self.pool = pooling.MySQLConnectionPool(**pool_config)
logger.info(f"Created MySQL connection pool with {pool_config['pool_size']} connections")
except mysql.connector.Error as e:
logger.error(f"Failed to create database connection pool: {e}")
raise
@contextmanager
def get_connection(self):
"""
Get a database connection from the pool.
Yields:
mysql.connector.connection.MySQLConnection: Database connection
Raises:
mysql.connector.Error: If connection cannot be established
"""
connection = None
try:
connection = self.pool.get_connection()
yield connection
except mysql.connector.Error as e:
logger.error(f"Database connection error: {e}")
if connection:
connection.rollback()
raise
finally:
if connection:
try:
connection.close()
except mysql.connector.Error as e:
logger.warning(f"Error closing connection: {e}")
def test_connection(self) -> bool:
"""
Test the database connection.
Returns:
bool: True if connection is successful, False otherwise
"""
try:
with self.get_connection() as conn:
cursor = conn.cursor()
cursor.execute("SELECT 1")
result = cursor.fetchone()
return result[0] == 1
except Exception as e:
logger.error(f"Database connection test failed: {e}")
return False
def create_tables(self):
"""Create all required database tables if they don't exist."""
with self.get_connection() as conn:
cursor = conn.cursor()
# Create user_states table
cursor.execute("""
CREATE TABLE IF NOT EXISTS user_states (
id INT AUTO_INCREMENT PRIMARY KEY,
user_id VARCHAR(255) NOT NULL UNIQUE,
current_phase VARCHAR(50) NOT NULL,
current_page VARCHAR(255),
current_instance_index INT DEFAULT -1,
max_assignments INT DEFAULT -1,
created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
INDEX idx_user_id (user_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
""")
# Create user_instance_assignments table
cursor.execute("""
CREATE TABLE IF NOT EXISTS user_instance_assignments (
id INT AUTO_INCREMENT PRIMARY KEY,
user_id VARCHAR(255) NOT NULL,
instance_id VARCHAR(255) NOT NULL,
assignment_order INT NOT NULL,
assigned_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
UNIQUE KEY unique_user_instance (user_id, instance_id),
INDEX idx_user_order (user_id, assignment_order),
FOREIGN KEY (user_id) REFERENCES user_states(user_id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
""")
# Create label_annotations table
cursor.execute("""
CREATE TABLE IF NOT EXISTS label_annotations (
id INT AUTO_INCREMENT PRIMARY KEY,
user_id VARCHAR(255) NOT NULL,
instance_id VARCHAR(255) NOT NULL,
schema_name VARCHAR(255) NOT NULL,
label_name VARCHAR(255) NOT NULL,
label_value TEXT,
created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
UNIQUE KEY unique_annotation (user_id, instance_id, schema_name, label_name),
INDEX idx_user_instance (user_id, instance_id),
FOREIGN KEY (user_id) REFERENCES user_states(user_id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
""")
# Create span_annotations table
cursor.execute("""
CREATE TABLE IF NOT EXISTS span_annotations (
id INT AUTO_INCREMENT PRIMARY KEY,
user_id VARCHAR(255) NOT NULL,
instance_id VARCHAR(255) NOT NULL,
schema_name VARCHAR(255) NOT NULL,
span_name VARCHAR(255) NOT NULL,
span_title VARCHAR(255),
start_pos INT NOT NULL,
end_pos INT NOT NULL,
kb_id VARCHAR(255) DEFAULT NULL,
kb_source VARCHAR(255) DEFAULT NULL,
kb_label VARCHAR(512) DEFAULT NULL,
created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
INDEX idx_user_instance (user_id, instance_id),
FOREIGN KEY (user_id) REFERENCES user_states(user_id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
""")
# Create phase_annotations table
cursor.execute("""
CREATE TABLE IF NOT EXISTS phase_annotations (
id INT AUTO_INCREMENT PRIMARY KEY,
user_id VARCHAR(255) NOT NULL,
phase_name VARCHAR(50) NOT NULL,
page_name VARCHAR(255) NOT NULL,
schema_name VARCHAR(255) NOT NULL,
label_name VARCHAR(255) NOT NULL,
label_value TEXT,
created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
UNIQUE KEY unique_phase_annotation (user_id, phase_name, page_name, schema_name, label_name),
FOREIGN KEY (user_id) REFERENCES user_states(user_id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
""")
# Create behavioral_data table
cursor.execute("""
CREATE TABLE IF NOT EXISTS behavioral_data (
id INT AUTO_INCREMENT PRIMARY KEY,
user_id VARCHAR(255) NOT NULL,
instance_id VARCHAR(255) NOT NULL,
data_key VARCHAR(255) NOT NULL,
data_value TEXT,
created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
INDEX idx_user_instance (user_id, instance_id),
FOREIGN KEY (user_id) REFERENCES user_states(user_id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
""")
# Create ai_hints table
cursor.execute("""
CREATE TABLE IF NOT EXISTS ai_hints (
id INT AUTO_INCREMENT PRIMARY KEY,
user_id VARCHAR(255) NOT NULL,
instance_id VARCHAR(255) NOT NULL,
hint_text TEXT NOT NULL,
created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
UNIQUE KEY unique_hint (user_id, instance_id),
FOREIGN KEY (user_id) REFERENCES user_states(user_id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
""")
conn.commit()
logger.info("Database tables created successfully")
def drop_tables(self):
"""Drop all database tables (for testing)."""
with self.get_connection() as conn:
cursor = conn.cursor()
# Drop tables in reverse dependency order
tables = [
'ai_hints',
'behavioral_data',
'phase_annotations',
'span_annotations',
'label_annotations',
'user_instance_assignments',
'user_states'
]
for table in tables:
cursor.execute(f"DROP TABLE IF EXISTS {table}")
conn.commit()
logger.info("Database tables dropped successfully")
def close(self):
"""Close the database connection pool."""
if self.pool:
self.pool.close()
logger.info("Database connection pool closed") |