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c65eb35e8c
#rb Per.Larsson #jira UE-182205 #preflight 643932b2211b661dc4f594c6 - The enums don't contain any entries at the moment, the goal of this change is to reduce the friction that future API changes might have. - The older versions of PullData/PushData have been deprecated but this won't flag compiler warnings if people have derived their own implementations of IVirtualizationBackend, so in addition to deprecating the methods have been set to 'final' and have checkNoEntry implementations which is the best we can do at the moment. -- It is unlikely that people have actually done this as the documentation on adding new backend types will only go out in 5.3. [CL 25039959 by paul chipchase in ue5-main branch]
59 lines
2.0 KiB
C++
59 lines
2.0 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "IVirtualizationBackend.h"
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#include "DerivedDataCacheKey.h"
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namespace UE::DerivedData { enum class ECachePolicy : uint32; }
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namespace UE::Virtualization
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{
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/**
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* A backend that uses the DDC2 as it's storage mechanism. It is intended to be used as a local caching
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* system to speed up operations rather than for use as persistent storage.
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*
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* Ini file setup:
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* 'Name'=(Type=DDCBackend, Bucket="XXX", LocalStorage=True/False, RemoteStorage=True/False)
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*
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* Required Values:
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* 'Name': The backend name in the hierarchy.
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*
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* Optional Values:
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* Bucket: An alphanumeric identifier used to group the payloads together in storage. [Default="BulkData"]
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* LocalStorage: When set to true, the payloads can be stored locally. [Default=true]
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* RemoteStorage: When set to true, the payloads can be stored remotely. [Default=true]
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*/
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class FDDCBackend final : public IVirtualizationBackend
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{
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public:
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explicit FDDCBackend(FStringView ProjectName, FStringView ConfigName, FStringView InDebugName);
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virtual ~FDDCBackend() = default;
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private:
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/* IVirtualizationBackend implementation */
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virtual bool Initialize(const FString& ConfigEntry) override;
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virtual EConnectionStatus OnConnect() override;
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virtual bool PushData(TArrayView<FPushRequest> Requests, EPushFlags Flags) override;
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virtual bool PullData(TArrayView<FPullRequest> Requests, EPullFlags Flags) override;
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virtual bool DoesPayloadExist(const FIoHash& Id) override;
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private:
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/** The bucket being used to group together the virtualized payloads in storage */
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FString BucketName;
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/** The FCacheBucket used with the DDC, cached to avoid recreating it for each request */
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UE::DerivedData::FCacheBucket Bucket;
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/** The policy to use when uploading or downloading data from the cache */
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UE::DerivedData::ECachePolicy TransferPolicy;
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/** The policy to use when querying the cache for information */
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UE::DerivedData::ECachePolicy QueryPolicy;
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};
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} // namespace UE::Virtualization
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