193 lines
6.0 KiB
Python
193 lines
6.0 KiB
Python
"""
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MongoDB database connection and operations.
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This module provides MongoDB connection management with:
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1. Connection pooling
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2. Lifecycle management
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3. Error handling
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"""
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from typing import Optional, Dict, Any, List, Union, Callable
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from contextlib import contextmanager
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from pymongo import MongoClient
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from pymongo.results import InsertOneResult, DeleteResult, UpdateResult
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from pymongo.cursor import Cursor
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from functools import wraps
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from AllConfigs.NoSqlDatabase.configs import MongoConfig
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class MongoInsertMixin:
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"""Mixin for MongoDB insert operations."""
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def insert_one(self, document: Dict[str, Any]) -> InsertOneResult:
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"""Insert a single document."""
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return self.collection.insert_one(document)
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def insert_many(self, documents: List[Dict[str, Any]]) -> List[InsertOneResult]:
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"""Insert multiple documents."""
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return self.collection.insert_many(documents)
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class MongoFindMixin:
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"""Mixin for MongoDB find operations."""
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def find_one(self, filter_query: Dict[str, Any]) -> Optional[Dict[str, Any]]:
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"""Find a single document."""
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return self.collection.find_one(filter_query)
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def find_many(self, filter_query: Dict[str, Any]) -> Cursor:
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"""Find multiple documents."""
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return self.collection.find(filter_query)
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class MongoUpdateMixin:
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"""Mixin for MongoDB update operations."""
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def update_one(
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self, filter_query: Dict[str, Any], update: Dict[str, Any]
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) -> UpdateResult:
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"""Update a single document."""
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return self.collection.update_one(filter_query, update)
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def update_many(
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self, filter_query: Dict[str, Any], update: Dict[str, Any]
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) -> UpdateResult:
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"""Update multiple documents."""
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return self.collection.update_many(filter_query, update)
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class MongoDeleteMixin:
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"""Mixin for MongoDB delete operations."""
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def delete_one(self, filter_query: Dict[str, Any]) -> DeleteResult:
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"""Delete a single document."""
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return self.collection.delete_one(filter_query)
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def delete_many(self, filter_query: Dict[str, Any]) -> DeleteResult:
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"""Delete multiple documents."""
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return self.collection.delete_many(filter_query)
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class MongoAggregateMixin:
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"""Mixin for MongoDB aggregate operations."""
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def aggregate(self, pipeline: List[Dict[str, Any]]) -> Cursor:
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"""Execute an aggregation pipeline."""
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return self.collection.aggregate(pipeline)
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class MongoDBHandler(
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MongoInsertMixin,
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MongoFindMixin,
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MongoUpdateMixin,
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MongoDeleteMixin,
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MongoAggregateMixin,
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):
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"""Handler for MongoDB operations with connection management."""
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_instance = None
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_client: Optional[MongoClient] = None
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def __new__(cls):
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"""Implement singleton pattern for database connection."""
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if cls._instance is None:
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cls._instance = super().__new__(cls)
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return cls._instance
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def __init__(self):
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"""Initialize MongoDB connection if not already initialized."""
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if not self._client:
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# Build connection options
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connection_kwargs = {
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"host": MongoConfig.URL,
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"maxPoolSize": 50, # Maximum number of connections in the pool
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"minPoolSize": 10, # Minimum number of connections in the pool
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"maxIdleTimeMS": 30000, # Maximum time a connection can be idle (30 seconds)
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"waitQueueTimeoutMS": 2000, # How long a thread will wait for a connection
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"serverSelectionTimeoutMS": 5000, # How long to wait for server selection
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}
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self._client = MongoClient(**connection_kwargs)
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# Test connection
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self._client.admin.command("ping")
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def __enter__(self):
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"""Context manager entry point."""
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return self
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def __exit__(self, exc_type, exc_val, exc_tb):
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"""Context manager exit point - ensures connection is properly closed."""
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try:
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if self._client:
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self._client.close()
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self._client = None
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except Exception:
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# Silently pass any errors during shutdown
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pass
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return False # Don't suppress any exceptions
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def close(self):
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"""Close MongoDB connection."""
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try:
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if self._client:
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self._client.close()
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self._client = None
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except Exception:
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# Silently pass any errors during shutdown
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pass
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@property
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def client(self) -> MongoClient:
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"""Get MongoDB client."""
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return self._client
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def get_database(self, database_name: str = None):
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"""Get MongoDB database."""
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db_name = database_name or MongoConfig.DATABASE_NAME
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return self._client[db_name]
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def get_collection(self, collection_name: str, database_name: str = None):
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"""Get MongoDB collection."""
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database = self.get_database(database_name)
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return database[collection_name]
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# Create a function to get the singleton instance
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@classmethod
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@contextmanager
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def get_mongodb(cls):
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"""Get or create the MongoDB singleton instance as a context manager."""
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instance = cls()
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try:
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yield instance
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finally:
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try:
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if instance._client:
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instance._client.close()
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instance._client = None
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except Exception:
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# Silently pass any errors during shutdown
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pass
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@classmethod
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def with_mongodb(cls, func: Callable):
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"""Decorator to automatically handle MongoDB connection context.
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Usage:
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@MongoDBHandler.with_mongodb
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def my_function(db, *args, **kwargs):
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# db is the MongoDB instance
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pass
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"""
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@wraps(func)
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def wrapper(*args, **kwargs):
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with cls.get_mongodb() as db:
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return func(db, *args, **kwargs)
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return wrapper
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# Create a singleton instance for backward compatibility
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mongodb = MongoDBHandler()
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