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# src/core/state.py
from src.config.settings import settings
from src.core.memory_manager import MemoryManager
from src.utils.embeddings import EmbeddingClient
from src.utils.rotator import APIKeyRotator
class AppState:
"""
Manages the global state of the application's services using a Singleton pattern.
This class acts as a dependency injection container.
"""
_instance = None
def __new__(cls):
if cls._instance is None:
cls._instance = super(AppState, cls).__new__(cls)
cls._instance._initialized = False
return cls._instance
def __init__(self):
if self._initialized:
return
# --- Core Services ---
self.embedding_client: EmbeddingClient
self.memory_manager: MemoryManager
# --- API Key Rotators ---
self.gemini_rotator: APIKeyRotator
self.nvidia_rotator: APIKeyRotator
self._initialized = True
def initialize(self):
"""Initializes all core application components in the correct order."""
# Initialize components with no dependencies first
self.embedding_client = EmbeddingClient(model_name=settings.EMBEDDING_MODEL_NAME)
self.gemini_rotator = APIKeyRotator("GEMINI_API_", max_slots=5)
self.nvidia_rotator = APIKeyRotator("NVIDIA_API_", max_slots=5)
# Initialize the main service layer, injecting its dependencies
self.memory_manager = MemoryManager(
embedder=self.embedding_client,
max_sessions_per_user=20
)
def get_state() -> AppState:
"""
Provides access to the application state singleton.
This function is designed for use as a dependency in an API framework.
"""
state = AppState()
# The initialize method is idempotent, but it's good practice
# to ensure it's called at least once on startup.
# A web framework's startup event is the ideal place for this.
return state
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