REFACTOR - Database logic

shared/database/exceptions.py

@@ -0,0 +1,52 @@
+"""
+Custom Database Exceptions
+Provides consistent error handling across all microservices
+"""
+
+class DatabaseError(Exception):
+    """Base exception for database-related errors"""
+    
+    def __init__(self, message: str, details: dict = None):
+        self.message = message
+        self.details = details or {}
+        super().__init__(self.message)
+
+
+class ConnectionError(DatabaseError):
+    """Raised when database connection fails"""
+    pass
+
+
+class RecordNotFoundError(DatabaseError):
+    """Raised when a requested record is not found"""
+    pass
+
+
+class DuplicateRecordError(DatabaseError):
+    """Raised when trying to create a duplicate record"""
+    pass
+
+
+class ConstraintViolationError(DatabaseError):
+    """Raised when database constraints are violated"""
+    pass
+
+
+class TransactionError(DatabaseError):
+    """Raised when transaction operations fail"""
+    pass
+
+
+class ValidationError(DatabaseError):
+    """Raised when data validation fails before database operations"""
+    pass
+
+
+class MigrationError(DatabaseError):
+    """Raised when database migration operations fail"""
+    pass
+
+
+class HealthCheckError(DatabaseError):
+    """Raised when database health checks fail"""
+    pass