mirror of
https://github.com/facebook/sapling.git
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b71d531a39
Summary: This adds logging for files fetched in prefetch like was aleady added for blob and tree fetches. This is needed to log the fetches caused by the glob files thrift call. The purpose of this to help debug the cause of unexpected data fetches (See D22448048 for more motivation). Reviewed By: genevievehelsel Differential Revision: D22561619 fbshipit-source-id: 5ae78b99fb0c7d863d8223b93492b0d0210ddf9e
69 lines
1.7 KiB
C++
69 lines
1.7 KiB
C++
/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This software may be used and distributed according to the terms of the
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* GNU General Public License version 2.
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*/
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#pragma once
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#include <folly/futures/Future.h>
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#include <memory>
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#include "eden/fs/store/ImportPriority.h"
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#include "eden/fs/store/ObjectFetchContext.h"
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namespace folly {
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template <typename T>
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class Future;
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}
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namespace facebook {
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namespace eden {
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class Blob;
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class Hash;
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class Tree;
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/**
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* Abstract interface for a BackingStore.
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*
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* A BackingStore fetches tree and blob information from an external
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* authoritative data source.
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*
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* BackingStore implementations must be thread-safe, and perform their own
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* internal locking.
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*/
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class BackingStore {
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public:
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BackingStore() {}
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virtual ~BackingStore() {}
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virtual folly::SemiFuture<std::unique_ptr<Tree>> getTree(
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const Hash& id,
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ObjectFetchContext& context) = 0;
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virtual folly::SemiFuture<std::unique_ptr<Blob>> getBlob(
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const Hash& id,
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ObjectFetchContext& context) = 0;
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virtual folly::SemiFuture<std::unique_ptr<Tree>> getTreeForCommit(
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const Hash& commitID) = 0;
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virtual folly::SemiFuture<std::unique_ptr<Tree>> getTreeForManifest(
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const Hash& commitID,
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const Hash& manifestID) = 0;
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FOLLY_NODISCARD virtual folly::SemiFuture<folly::Unit> prefetchBlobs(
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const std::vector<Hash>& /*ids*/,
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ObjectFetchContext& /*context*/) {
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return folly::unit;
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}
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virtual void periodicManagementTask() {}
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private:
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// Forbidden copy constructor and assignment operator
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BackingStore(BackingStore const&) = delete;
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BackingStore& operator=(BackingStore const&) = delete;
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};
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} // namespace eden
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} // namespace facebook
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