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import gc
import platform
from typing import Iterable
from .metrics_core import CounterMetricFamily, Metric
from .registry import Collector, CollectorRegistry, REGISTRY
class GCCollector(Collector):
"""Collector for Garbage collection statistics."""
def __init__(self, registry: CollectorRegistry = REGISTRY):
if not hasattr(gc, 'get_stats') or platform.python_implementation() != 'CPython':
return
registry.register(self)
def collect(self) -> Iterable[Metric]:
collected = CounterMetricFamily(
'python_gc_objects_collected',
'Objects collected during gc',
labels=['generation'],
)
uncollectable = CounterMetricFamily(
'python_gc_objects_uncollectable',
'Uncollectable objects found during GC',
labels=['generation'],
)
collections = CounterMetricFamily(
'python_gc_collections',
'Number of times this generation was collected',
labels=['generation'],
)
for gen, stat in enumerate(gc.get_stats()):
generation = str(gen)
collected.add_metric([generation], value=stat['collected'])
uncollectable.add_metric([generation], value=stat['uncollectable'])
collections.add_metric([generation], value=stat['collections'])
return [collected, uncollectable, collections]
GC_COLLECTOR = GCCollector()
"""Default GCCollector in default Registry REGISTRY."""