82 lines
2.2 KiB
C++
82 lines
2.2 KiB
C++
/*
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* Tenant.h
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*
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* This source file is part of the FoundationDB open source project
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*
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* Copyright 2013-2022 Apple Inc. and the FoundationDB project authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef FDBCLIENT_TENANT_H
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#define FDBCLIENT_TENANT_H
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#pragma once
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#include "fdbclient/FDBTypes.h"
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#include "fdbclient/VersionedMap.h"
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#include "flow/flat_buffers.h"
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typedef StringRef TenantNameRef;
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typedef Standalone<TenantNameRef> TenantName;
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struct TenantMapEntry {
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constexpr static FileIdentifier file_identifier = 12247338;
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static Key idToPrefix(int64_t id) {
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int64_t swapped = bigEndian64(id);
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return StringRef(reinterpret_cast<const uint8_t*>(&swapped), 8);
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}
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static int64_t prefixToId(KeyRef prefix) {
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ASSERT(prefix.size() == 8);
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int64_t id = *reinterpret_cast<const int64_t*>(prefix.begin());
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id = bigEndian64(id);
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ASSERT(id >= 0);
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return id;
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}
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int64_t id;
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Key prefix;
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private:
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void initPrefix(KeyRef subspace) {
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ASSERT(id >= 0);
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prefix = makeString(8 + subspace.size());
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uint8_t* data = mutateString(prefix);
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memcpy(data, subspace.begin(), subspace.size());
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int64_t swapped = bigEndian64(id);
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memcpy(data + subspace.size(), &swapped, 8);
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}
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public:
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TenantMapEntry() : id(-1) {}
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TenantMapEntry(int64_t id, KeyRef subspace) : id(id) { initPrefix(subspace); }
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template <class Ar>
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void serialize(Ar& ar) {
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serializer(ar, id);
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if (ar.isDeserializing) {
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KeyRef subspace;
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serializer(ar, subspace);
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initPrefix(subspace);
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} else {
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KeyRef subspace = prefix.substr(0, prefix.size() - 8);
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serializer(ar, subspace);
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}
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}
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};
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typedef VersionedMap<TenantName, TenantMapEntry> TenantMap;
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typedef VersionedMap<KeyRef, TenantNameRef> TenantPrefixIndex;
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#endif |