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"""Service loader utility for safe, lazy loading of optional services.
This module handles the import and initialization of services that may
have missing optional dependencies (like Modal or Sentence Transformers),
preventing the application from crashing if they are not available.
"""
from typing import TYPE_CHECKING
import structlog
if TYPE_CHECKING:
from src.services.embeddings import EmbeddingService
from src.services.statistical_analyzer import StatisticalAnalyzer
logger = structlog.get_logger()
def get_embedding_service_if_available() -> "EmbeddingService | None":
"""
Safely attempt to load and initialize the EmbeddingService.
Returns:
EmbeddingService instance if dependencies are met, else None.
"""
try:
# Import here to avoid top-level dependency check
from src.services.embeddings import get_embedding_service
service = get_embedding_service()
logger.info("Embedding service initialized successfully")
return service
except ImportError as e:
logger.info(
"Embedding service not available (optional dependencies missing)",
missing_dependency=str(e),
)
except Exception as e:
logger.warning(
"Embedding service initialization failed unexpectedly",
error=str(e),
error_type=type(e).__name__,
)
return None
def get_analyzer_if_available() -> "StatisticalAnalyzer | None":
"""
Safely attempt to load and initialize the StatisticalAnalyzer.
Returns:
StatisticalAnalyzer instance if Modal is available, else None.
"""
try:
from src.services.statistical_analyzer import get_statistical_analyzer
analyzer = get_statistical_analyzer()
logger.info("StatisticalAnalyzer initialized successfully")
return analyzer
except ImportError as e:
logger.info(
"StatisticalAnalyzer not available (Modal dependencies missing)",
missing_dependency=str(e),
)
except Exception as e:
logger.warning(
"StatisticalAnalyzer initialization failed unexpectedly",
error=str(e),
error_type=type(e).__name__,
)
return None
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