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import io
import typing as t
import dill
from proxystore.store import Store
from parsl.serialize.base import SerializerBase
class ProxyStoreDeepPickler(dill.Pickler):
"""This class extends dill so that certain objects will be stored into
ProxyStore rather than serialized directly. The selection of objects is
made by a user-specified policy.
"""
def __init__(self, *args: t.Any, should_proxy: t.Callable[[t.Any], bool], store: Store, **kwargs: t.Any) -> None:
super().__init__(*args, **kwargs)
self._store = store
self._should_proxy = should_proxy
def reducer_override(self, o: t.Any) -> t.Any:
if self._should_proxy(o):
proxy = self._store.proxy(o)
return proxy.__reduce__()
else:
# fall through to dill
return NotImplemented
class ProxyStoreSerializer(SerializerBase):
def __init__(self, *, should_proxy: t.Optional[t.Callable[[t.Any], bool]] = None, store: t.Optional[Store] = None) -> None:
self._store = store
self._should_proxy = should_proxy
def serialize(self, data: t.Any) -> bytes:
assert self._store is not None
assert self._should_proxy is not None
assert data is not None
f = io.BytesIO()
pickler = ProxyStoreDeepPickler(file=f, store=self._store, should_proxy=self._should_proxy)
pickler.dump(data)
return f.getvalue()
def deserialize(self, body: bytes) -> t.Any:
# because we aren't customising deserialization, use regular
# dill for deserialization
return dill.loads(body)
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