65 lines
1.7 KiB
Python
65 lines
1.7 KiB
Python
"""
|
|
Chunker exception hierarchy.
|
|
|
|
Demonstrates: Managing exceptions and writing resilient code (Interview Topic 7).
|
|
"""
|
|
|
|
|
|
class PipelineError(Exception):
|
|
"""Base exception for all chunker pipeline errors."""
|
|
pass
|
|
|
|
|
|
class ChunkError(PipelineError):
|
|
"""Errors related to chunk creation or validation."""
|
|
pass
|
|
|
|
|
|
class ChunkReadError(ChunkError):
|
|
"""Failed to read chunk data from source file."""
|
|
pass
|
|
|
|
|
|
class ChunkChecksumError(ChunkError):
|
|
"""Chunk data integrity validation failed."""
|
|
|
|
def __init__(self, sequence: int, expected: str, actual: str):
|
|
self.sequence = sequence
|
|
self.expected = expected
|
|
self.actual = actual
|
|
super().__init__(
|
|
f"Chunk {sequence}: checksum mismatch "
|
|
f"(expected={expected}, actual={actual})"
|
|
)
|
|
|
|
|
|
class ProcessingError(PipelineError):
|
|
"""Errors during chunk processing by workers."""
|
|
pass
|
|
|
|
|
|
class ProcessorTimeoutError(ProcessingError):
|
|
"""Processor exceeded allowed time for a chunk."""
|
|
|
|
def __init__(self, sequence: int, timeout: float):
|
|
self.sequence = sequence
|
|
self.timeout = timeout
|
|
super().__init__(f"Chunk {sequence}: processor timed out after {timeout}s")
|
|
|
|
|
|
class ProcessorFailureError(ProcessingError):
|
|
"""Processor failed to process a chunk after all retries."""
|
|
|
|
def __init__(self, sequence: int, retries: int, original_error: Exception):
|
|
self.sequence = sequence
|
|
self.retries = retries
|
|
self.original_error = original_error
|
|
super().__init__(
|
|
f"Chunk {sequence}: failed after {retries} retries — {original_error}"
|
|
)
|
|
|
|
|
|
class ReassemblyError(PipelineError):
|
|
"""Errors during result collection and ordering."""
|
|
pass
|