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import hashlib | |
import prefect | |
def cache_namespace(enable_cache=True, verbose=False, shared_caching=False): | |
# TODO: Pray all Gods caching doesn't cause problems later | |
def creator( | |
flow_id, | |
flow_run_id, | |
flow_name, | |
flow_run_name, | |
task_name, | |
task_run_id, | |
logger, | |
task_id, | |
**kwargs, | |
): | |
for i in [ | |
"config", | |
"date", | |
"today", | |
"tomorrow", | |
"yesterday", | |
"today_nodash", | |
"tomorrow_nodash", | |
"yesterday_nodash", | |
"scheduled_start_time", | |
"task_run_version", | |
"task_run_count", | |
"checkpointing", | |
"flow_run_version", | |
"task_full_name", | |
"task_tags", | |
"map_index", | |
"task_slug", | |
"caches", | |
]: | |
kwargs.pop(i, None) | |
default_key = f"{flow_name}/{flow_run_name}.{flow_run_id}/{task_name}.{flow_id}.{task_run_id}.prefect_result" | |
if not enable_cache: | |
return default_key | |
try: | |
cache_keys = kwargs | { | |
"extras": [ | |
flow_id, | |
flow_run_name, | |
task_name, | |
task_id if not shared_caching else None, | |
] | |
} | |
unique_hash = hashlib.md5(str(cache_keys).encode()).hexdigest() | |
namespace = f"{flow_name}/{flow_run_name}.{flow_run_id}/{task_name}.{unique_hash}.prefect_result" | |
if verbose: | |
logger.info(f"namespace: {namespace}, cache_keys: {cache_keys}") | |
return namespace | |
except Exception as e: | |
return default_key | |
return creator | |
def task(**kwargs): | |
def inner(func): | |
class CacheableFunctionTask(prefect.tasks.core.function.FunctionTask): | |
def __init__(self, **kwargs): | |
super().__init__( | |
**( | |
{ | |
"max_retries": 3, | |
"retry_delay": 60, | |
"target": cache_namespace(), | |
} | |
| kwargs | |
) | |
) | |
return CacheableFunctionTask(fn=func, **kwargs) | |
return inner |
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