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#rb Per.Larsson, Devin.Doucette #jira UE-133497 #rnx #preflight 61f835491c5ac5523462810a - A lot of files have been touched but most of this is changing FPayload::IsValid to !FIoHash::IsZero, the main changes are in EditorBulkData/EditorBulkDataTests - The only difference between FPayloadId and FIoHash is that the former considered the hash of an invalid or empty buffer to be 'invalid' too where as FIoHash would return a valid hash -- To keep behaviour the same, we only hash payloads in EditorBulkData using a utility method ::HashBuffer which will not hash empty or invalid payloads and return a default FIoHash instead. -- Unit tests have been extended to prove that the behaviour has not changed. #ROBOMERGE-AUTHOR: paul.chipchase #ROBOMERGE-SOURCE: CL 18806362 in //UE5/Release-5.0/... via CL 18808527 via CL 18821790 #ROBOMERGE-BOT: UE5 (Release-Engine-Test -> Main) (v908-18788545) [CL 18822154 by paul chipchase in ue5-main branch]
63 lines
2.2 KiB
C++
63 lines
2.2 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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namespace UE::Virtualization
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{
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/**
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* A basic backend based on the file system. This can be used to access/store virtualization
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* data either on a local disk or a network share. It is intended to be used as a caching system
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* to speed up operations (running a local cache or a shared cache for a site) rather than as the
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* proper backend solution.
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*
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* Ini file setup:
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* 'Name'=(Type=FileSystem, Path="XXX", RetryCount=X, RetryWaitTime=X)
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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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* 'Type': The backend will be of type 'FFileSystemBackend'.
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* 'Path': The root directory where the files are stored.
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*
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* Optional Values:
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* RetryCount: How many times we should try to open a payload file for read before giving up with
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* an error. Useful when many threads/processes can be pushing/pulling from the same
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* path/ [Default=10]
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* RetryWaitTime: The length of time the process should wait between each read attempt in milliseconds.
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* Remember that the max length of time that the process can stall attempting to read
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* a payload file is RetryCount * RetryWaitTime; [Default=100ms]
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*/
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class FFileSystemBackend final : public IVirtualizationBackend
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{
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public:
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explicit FFileSystemBackend(FStringView ConfigName, FStringView DebugName);
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virtual ~FFileSystemBackend() = 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 EPushResult PushData(const FIoHash& Id, const FCompressedBuffer& Payload, const FString& PackageContext) override;
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virtual FCompressedBuffer PullData(const FIoHash& Id) override;
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virtual bool DoesPayloadExist(const FIoHash& Id) override;
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private:
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void CreateFilePath(const FIoHash& PayloadId, FStringBuilderBase& OutPath);
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TUniquePtr<FArchive> OpenFileForReading(const TCHAR* FilePath);
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/** The root directory where the payload files should be located. */
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FString RootDirectory;
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/** The number of times to retry opening a payload file for read */
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int32 RetryCount = 10;
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/** The length of time (in milliseconds) to wait after each attempt before retrying. */
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int32 RetryWaitTimeMS = 100;
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};
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} // namespace UE::Virtualization
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