"""
Custom exceptions for the LangChain Documentation Server.
"""
class LangChainServiceError(Exception):
"""Base exception for LangChain service errors."""
def __init__(self, message: str, status_code: int = 500):
self.message = message
self.status_code = status_code
super().__init__(self.message)
class DocumentationNotFoundError(LangChainServiceError):
"""Raised when documentation is not found."""
def __init__(self, message: str = "Documentation not found"):
super().__init__(message, status_code=404)
class APIRateLimitError(LangChainServiceError):
"""Raised when API rate limit is exceeded."""
def __init__(self, message: str = "API rate limit exceeded"):
super().__init__(message, status_code=429)
class ExternalAPIError(LangChainServiceError):
"""Raised when external API calls fail."""
def __init__(self, message: str = "External API error"):
super().__init__(message, status_code=502)
class ValidationError(LangChainServiceError):
"""Raised when input validation fails."""
def __init__(self, message: str = "Validation error"):
super().__init__(message, status_code=400)
