Source code for airflow.providers.common.ai.durable.step_counter
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"""Shared step counter for durable execution caching."""
from __future__ import annotations
[docs]
class DurableStepCounter:
"""
Monotonically increasing counter shared between CachingModel and CachingToolset.
Each model call and tool call increments the counter. The step index
is used as the cache key; replay correctness is verified separately by
comparing the request fingerprint stored with each cache entry (see
``airflow.providers.common.ai.durable.fingerprint``).
"""
def __init__(self) -> None:
self._step: int = 0
[docs]
self.replayed_model: int = 0
[docs]
self.cached_model: int = 0
[docs]
def next_step(self) -> int:
"""Return the current step and advance the counter."""
step = self._step
self._step += 1
return step
@property
[docs]
def total_steps(self) -> int:
"""Total number of steps executed so far."""
return self._step