init: tested on hangtuah to cloud

utils/error_handler.py

@@ -0,0 +1,53 @@
+"""
+Error handling and retry mechanisms for DICOM operations.
+"""
+import time
+import functools
+from retry import retry
+from utils.logger import main_logger as logger
+from config import settings
+
+# Define custom exceptions
+class DicomConnectionError(Exception):
+    """Error when failing to establish DICOM association."""
+    pass
+
+class DicomQueryError(Exception):
+    """Error when C-FIND operation fails."""
+    pass
+
+class DicomRetrieveError(Exception):
+    """Error when C-GET operation fails."""
+    pass
+
+class DicomStoreError(Exception):
+    """Error when C-STORE operation fails."""
+    pass
+
+def dicom_retry(exception_types=(Exception,)):
+    """
+    Decorator to retry DICOM operations with exponential backoff.
+    
+    Args:
+        exception_types: Tuple of exception types to retry on.
+        
+    Returns:
+        Decorated function with retry logic.
+    """
+    def decorator(func):
+        @functools.wraps(func)
+        @retry(
+            exceptions=exception_types,
+            tries=settings.MAX_RETRIES,
+            delay=settings.RETRY_DELAY,
+            backoff=2,
+            logger=logger
+        )
+        def wrapper(*args, **kwargs):
+            try:
+                return func(*args, **kwargs)
+            except exception_types as e:
+                logger.error(f"Error in {func.__name__}: {str(e)}")
+                raise
+        return wrapper
+    return decorator