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// Copyright Epic Games, Inc. All Rights Reserved.
#include <zenstore/cas.h>
#include "compactcas.h"
#include "filecas.h"
#include <doctest/doctest.h>
#include <zencore/except.h>
#include <zencore/fmtutils.h>
#include <zencore/memory.h>
#include <zencore/string.h>
#include <zencore/thread.h>
#include <zencore/uid.h>
#include <spdlog/spdlog.h>
#include <gsl/gsl-lite.hpp>
#include <filesystem>
#include <functional>
#include <unordered_map>
struct IUnknown; // Workaround for "combaseapi.h(229): error C2187: syntax error: 'identifier' was unexpected here" when using /permissive-
#include <atlfile.h>
//////////////////////////////////////////////////////////////////////////
namespace zen {
/**
* Slightly less naive CAS store
*/
class CasImpl : public CasStore
{
public:
CasImpl();
virtual ~CasImpl();
virtual void Initialize(const CasStoreConfiguration& InConfig) override;
virtual CasStore::InsertResult InsertChunk(IoBuffer Chunk, const IoHash& ChunkHash) override;
virtual IoBuffer FindChunk(const IoHash& ChunkHash) override;
virtual void Flush() override;
private:
void PickDefaultDirectory();
CasContainerStrategy m_TinyStrategy;
CasContainerStrategy m_SmallStrategy;
FileCasStrategy m_LargeStrategy;
};
CasImpl::CasImpl() : m_TinyStrategy(m_Config, m_Stats), m_SmallStrategy(m_Config, m_Stats), m_LargeStrategy(m_Config, m_Stats)
{
}
CasImpl::~CasImpl()
{
}
void
CasImpl::Initialize(const CasStoreConfiguration& InConfig)
{
m_Config = InConfig;
spdlog::info("initializing CAS pool at {}", m_Config.RootDirectory);
// Ensure root directory exists - create if it doesn't exist already
std::filesystem::create_directories(m_Config.RootDirectory);
// Open or create manifest
bool IsNewStore = false;
{
std::filesystem::path ManifestPath = m_Config.RootDirectory;
ManifestPath /= ".ucas_root";
CAtlFile marker;
HRESULT hRes = marker.Create(ManifestPath.c_str(), GENERIC_READ, 0, OPEN_EXISTING);
if (FAILED(hRes))
{
IsNewStore = true;
ExtendableStringBuilder<128> manifest;
manifest.Append("#CAS_ROOT\n"); // TODO: should write something meaningful here
manifest.Append("ID=");
zen::Oid id = zen::Oid::NewOid();
id.ToString(manifest);
hRes = marker.Create(ManifestPath.c_str(), GENERIC_WRITE, 0, CREATE_ALWAYS);
if (SUCCEEDED(hRes))
marker.Write(manifest.c_str(), (DWORD)manifest.Size());
}
}
// Initialize payload storage
m_TinyStrategy.Initialize("tobs", 16, IsNewStore);
m_SmallStrategy.Initialize("sobs", 4096, IsNewStore);
}
CasStore::InsertResult
CasImpl::InsertChunk(IoBuffer Chunk, const IoHash& ChunkHash)
{
const uint64_t ChunkSize = Chunk.Size();
if (ChunkSize < m_Config.TinyValueThreshold)
{
ZEN_ASSERT(ChunkSize);
return m_TinyStrategy.InsertChunk(Chunk, ChunkHash);
}
else if (ChunkSize < m_Config.HugeValueThreshold)
{
return m_SmallStrategy.InsertChunk(Chunk, ChunkHash);
}
return m_LargeStrategy.InsertChunk(Chunk, ChunkHash);
}
IoBuffer
CasImpl::FindChunk(const IoHash& ChunkHash)
{
if (IoBuffer Found = m_SmallStrategy.FindChunk(ChunkHash))
{
return Found;
}
if (IoBuffer Found = m_TinyStrategy.FindChunk(ChunkHash))
{
return Found;
}
if (IoBuffer Found = m_LargeStrategy.FindChunk(ChunkHash))
{
return Found;
}
// Not found
return IoBuffer{};
}
void
CasImpl::Flush()
{
m_SmallStrategy.Flush();
m_TinyStrategy.Flush();
m_LargeStrategy.Flush();
}
//////////////////////////////////////////////////////////////////////////
CasStore*
CreateCasStore()
{
return new CasImpl();
}
//////////////////////////////////////////////////////////////////////////
//
// Testing related code follows...
//
void
CAS_forcelink()
{
}
TEST_CASE("CasStore")
{
zen::CasStoreConfiguration config;
config.RootDirectory = "c:\\temp\\test";
std::unique_ptr<zen::CasStore> store{CreateCasStore()};
store->Initialize(config);
}
} // namespace zen
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