455 lines
19 KiB
C++
455 lines
19 KiB
C++
/*
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* MultiVersionTransaction.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 2013-2018 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_MULTIVERSIONTRANSACTION_H
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#define FDBCLIENT_MULTIVERSIONTRANSACTION_H
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#pragma once
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#include "fdbclient/FDBOptions.g.h"
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#include "fdbclient/FDBTypes.h"
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#include "fdbclient/IClientApi.h"
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#include "flow/ThreadHelper.actor.h"
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struct FdbCApi : public ThreadSafeReferenceCounted<FdbCApi> {
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typedef struct future FDBFuture;
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typedef struct cluster FDBCluster;
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typedef struct database FDBDatabase;
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typedef struct transaction FDBTransaction;
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#pragma pack(push, 4)
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typedef struct key {
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const uint8_t* key;
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int keyLength;
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} FDBKey;
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typedef struct keyvalue {
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const void *key;
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int keyLength;
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const void *value;
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int valueLength;
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} FDBKeyValue;
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#pragma pack(pop)
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typedef int fdb_error_t;
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typedef int fdb_bool_t;
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typedef void (*FDBCallback)(FDBFuture *future, void *callback_parameter);
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//Network
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fdb_error_t (*selectApiVersion)(int runtimeVersion, int headerVersion);
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const char* (*getClientVersion)();
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FDBFuture* (*getServerProtocol)(const char* clusterFilePath);
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fdb_error_t (*setNetworkOption)(FDBNetworkOptions::Option option, uint8_t const *value, int valueLength);
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fdb_error_t (*setupNetwork)();
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fdb_error_t (*runNetwork)();
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fdb_error_t (*stopNetwork)();
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fdb_error_t* (*createDatabase)(const char *clusterFilePath, FDBDatabase **db);
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//Database
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fdb_error_t (*databaseCreateTransaction)(FDBDatabase *database, FDBTransaction **tr);
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fdb_error_t (*databaseSetOption)(FDBDatabase *database, FDBDatabaseOptions::Option option, uint8_t const *value, int valueLength);
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void (*databaseDestroy)(FDBDatabase *database);
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FDBFuture* (*databaseRebootWorker)(FDBDatabase *database, uint8_t const *address, int addressLength, fdb_bool_t check, int duration);
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FDBFuture* (*databaseForceRecoveryWithDataLoss)(FDBDatabase *database, uint8_t const *dcid, int dcidLength);
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FDBFuture* (*databaseCreateSnapshot)(FDBDatabase *database, uint8_t const *snapshot_commmand, int snapshotCommandLength);
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//Transaction
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fdb_error_t (*transactionSetOption)(FDBTransaction *tr, FDBTransactionOptions::Option option, uint8_t const *value, int valueLength);
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void (*transactionDestroy)(FDBTransaction *tr);
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void (*transactionSetReadVersion)(FDBTransaction *tr, int64_t version);
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FDBFuture* (*transactionGetReadVersion)(FDBTransaction *tr);
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FDBFuture* (*transactionGet)(FDBTransaction *tr, uint8_t const *keyName, int keyNameLength, fdb_bool_t snapshot);
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FDBFuture* (*transactionGetKey)(FDBTransaction *tr, uint8_t const *keyName, int keyNameLength, fdb_bool_t orEqual, int offset, fdb_bool_t snapshot);
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FDBFuture* (*transactionGetAddressesForKey)(FDBTransaction *tr, uint8_t const *keyName, int keyNameLength);
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FDBFuture* (*transactionGetRange)(FDBTransaction *tr, uint8_t const *beginKeyName, int beginKeyNameLength, fdb_bool_t beginOrEqual, int beginOffset,
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uint8_t const *endKeyName, int endKeyNameLength, fdb_bool_t endOrEqual, int endOffset, int limit, int targetBytes,
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FDBStreamingModes::Option mode, int iteration, fdb_bool_t snapshot, fdb_bool_t reverse);
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FDBFuture* (*transactionGetVersionstamp)(FDBTransaction* tr);
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void (*transactionSet)(FDBTransaction *tr, uint8_t const *keyName, int keyNameLength, uint8_t const *value, int valueLength);
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void (*transactionClear)(FDBTransaction *tr, uint8_t const *keyName, int keyNameLength);
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void (*transactionClearRange)(FDBTransaction *tr, uint8_t const *beginKeyName, int beginKeyNameLength, uint8_t const *endKeyName, int endKeyNameLength);
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void (*transactionAtomicOp)(FDBTransaction *tr, uint8_t const *keyName, int keyNameLength, uint8_t const *param, int paramLength, FDBMutationTypes::Option operationType);
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FDBFuture* (*transactionGetEstimatedRangeSizeBytes)(FDBTransaction* tr, uint8_t const* begin_key_name,
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int begin_key_name_length, uint8_t const* end_key_name, int end_key_name_length);
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FDBFuture* (*transactionGetRangeSplitPoints)(FDBTransaction* tr, uint8_t const* begin_key_name,
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int begin_key_name_length, uint8_t const* end_key_name,
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int end_key_name_length, int64_t chunkSize);
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FDBFuture* (*transactionCommit)(FDBTransaction *tr);
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fdb_error_t (*transactionGetCommittedVersion)(FDBTransaction *tr, int64_t *outVersion);
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FDBFuture* (*transactionGetApproximateSize)(FDBTransaction *tr);
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FDBFuture* (*transactionWatch)(FDBTransaction *tr, uint8_t const *keyName, int keyNameLength);
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FDBFuture* (*transactionOnError)(FDBTransaction *tr, fdb_error_t error);
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void (*transactionReset)(FDBTransaction *tr);
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void (*transactionCancel)(FDBTransaction *tr);
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fdb_error_t (*transactionAddConflictRange)(FDBTransaction *tr, uint8_t const *beginKeyName, int beginKeyNameLength,
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uint8_t const *endKeyName, int endKeyNameLength, FDBConflictRangeTypes::Option);
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//Future
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fdb_error_t (*futureGetDatabase)(FDBFuture *f, FDBDatabase **outDb);
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fdb_error_t (*futureGetInt64)(FDBFuture *f, int64_t *outValue);
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fdb_error_t (*futureGetUInt64)(FDBFuture *f, uint64_t *outValue);
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fdb_error_t (*futureGetBool) (FDBFuture *f, bool *outValue);
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fdb_error_t (*futureGetError)(FDBFuture *f);
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fdb_error_t (*futureGetKey)(FDBFuture *f, uint8_t const **outKey, int *outKeyLength);
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fdb_error_t (*futureGetValue)(FDBFuture *f, fdb_bool_t *outPresent, uint8_t const **outValue, int *outValueLength);
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fdb_error_t (*futureGetStringArray)(FDBFuture *f, const char ***outStrings, int *outCount);
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fdb_error_t (*futureGetKeyArray)(FDBFuture* f, FDBKey const** outKeys, int* outCount);
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fdb_error_t (*futureGetKeyValueArray)(FDBFuture *f, FDBKeyValue const ** outKV, int *outCount, fdb_bool_t *outMore);
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fdb_error_t (*futureSetCallback)(FDBFuture *f, FDBCallback callback, void *callback_parameter);
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void (*futureCancel)(FDBFuture *f);
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void (*futureDestroy)(FDBFuture *f);
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//Legacy Support
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FDBFuture* (*createCluster)(const char *clusterFilePath);
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FDBFuture* (*clusterCreateDatabase)(FDBCluster *cluster, uint8_t *dbName, int dbNameLength);
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void (*clusterDestroy)(FDBCluster *cluster);
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fdb_error_t (*futureGetCluster)(FDBFuture *f, FDBCluster **outCluster);
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};
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class DLTransaction : public ITransaction, ThreadSafeReferenceCounted<DLTransaction> {
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public:
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DLTransaction(Reference<FdbCApi> api, FdbCApi::FDBTransaction *tr) : api(api), tr(tr) {}
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~DLTransaction() override { api->transactionDestroy(tr); }
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void cancel() override;
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void setVersion(Version v) override;
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ThreadFuture<Version> getReadVersion() override;
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ThreadFuture<Optional<Value>> get(const KeyRef& key, bool snapshot=false) override;
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ThreadFuture<Key> getKey(const KeySelectorRef& key, bool snapshot=false) override;
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ThreadFuture<Standalone<RangeResultRef>> getRange(const KeySelectorRef& begin, const KeySelectorRef& end, int limit, bool snapshot=false, bool reverse=false) override;
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ThreadFuture<Standalone<RangeResultRef>> getRange(const KeySelectorRef& begin, const KeySelectorRef& end, GetRangeLimits limits, bool snapshot=false, bool reverse=false) override;
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ThreadFuture<Standalone<RangeResultRef>> getRange(const KeyRangeRef& keys, int limit, bool snapshot=false, bool reverse=false) override;
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ThreadFuture<Standalone<RangeResultRef>> getRange( const KeyRangeRef& keys, GetRangeLimits limits, bool snapshot=false, bool reverse=false) override;
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ThreadFuture<Standalone<VectorRef<const char*>>> getAddressesForKey(const KeyRef& key) override;
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ThreadFuture<Standalone<StringRef>> getVersionstamp() override;
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ThreadFuture<int64_t> getEstimatedRangeSizeBytes(const KeyRangeRef& keys) override;
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ThreadFuture<Standalone<VectorRef<KeyRef>>> getRangeSplitPoints(const KeyRangeRef& range,
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int64_t chunkSize) override;
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void addReadConflictRange(const KeyRangeRef& keys) override;
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void atomicOp(const KeyRef& key, const ValueRef& value, uint32_t operationType) override;
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void set(const KeyRef& key, const ValueRef& value) override;
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void clear(const KeyRef& begin, const KeyRef& end) override;
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void clear(const KeyRangeRef& range) override;
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void clear(const KeyRef& key) override;
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ThreadFuture<Void> watch(const KeyRef& key) override;
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void addWriteConflictRange(const KeyRangeRef& keys) override;
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ThreadFuture<Void> commit() override;
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Version getCommittedVersion() override;
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ThreadFuture<int64_t> getApproximateSize() override;
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void setOption(FDBTransactionOptions::Option option, Optional<StringRef> value=Optional<StringRef>()) override;
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ThreadFuture<Void> onError(Error const& e) override;
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void reset() override;
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void addref() override { ThreadSafeReferenceCounted<DLTransaction>::addref(); }
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void delref() override { ThreadSafeReferenceCounted<DLTransaction>::delref(); }
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private:
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const Reference<FdbCApi> api;
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FdbCApi::FDBTransaction* const tr;
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};
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class DLDatabase : public IDatabase, ThreadSafeReferenceCounted<DLDatabase> {
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public:
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DLDatabase(Reference<FdbCApi> api, FdbCApi::FDBDatabase *db) : api(api), db(db), ready(Void()) {}
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DLDatabase(Reference<FdbCApi> api, ThreadFuture<FdbCApi::FDBDatabase*> dbFuture);
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~DLDatabase() override {
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if (db) {
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api->databaseDestroy(db);
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}
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}
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ThreadFuture<Void> onReady();
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Reference<ITransaction> createTransaction() override;
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void setOption(FDBDatabaseOptions::Option option, Optional<StringRef> value = Optional<StringRef>()) override;
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void addref() override { ThreadSafeReferenceCounted<DLDatabase>::addref(); }
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void delref() override { ThreadSafeReferenceCounted<DLDatabase>::delref(); }
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ThreadFuture<int64_t> rebootWorker(const StringRef& address, bool check, int duration) override;
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ThreadFuture<Void> forceRecoveryWithDataLoss(const StringRef& dcid) override;
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ThreadFuture<Void> createSnapshot(const StringRef& snapshot_command) override;
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private:
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const Reference<FdbCApi> api;
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FdbCApi::FDBDatabase* db; // Always set if API version >= 610, otherwise guaranteed to be set when onReady future is set
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ThreadFuture<Void> ready;
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};
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class DLApi : public IClientApi {
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public:
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DLApi(std::string fdbCPath);
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void selectApiVersion(int apiVersion) override;
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const char* getClientVersion() override;
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ThreadFuture<uint64_t> getServerProtocol(const char* clusterFilePath) override;
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void setNetworkOption(FDBNetworkOptions::Option option, Optional<StringRef> value = Optional<StringRef>()) override;
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void setupNetwork() override;
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void runNetwork() override;
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void stopNetwork() override;
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Reference<IDatabase> createDatabase(const char *clusterFilePath) override;
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Reference<IDatabase> createDatabase609(const char *clusterFilePath); // legacy database creation
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void addNetworkThreadCompletionHook(void (*hook)(void*), void *hookParameter) override;
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private:
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const std::string fdbCPath;
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const Reference<FdbCApi> api;
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int headerVersion;
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bool networkSetup;
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Mutex lock;
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std::vector<std::pair<void (*)(void*), void*>> threadCompletionHooks;
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void init();
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};
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class MultiVersionDatabase;
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class MultiVersionTransaction : public ITransaction, ThreadSafeReferenceCounted<MultiVersionTransaction> {
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public:
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MultiVersionTransaction(Reference<MultiVersionDatabase> db, UniqueOrderedOptionList<FDBTransactionOptions> defaultOptions);
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void cancel() override;
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void setVersion(Version v) override;
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ThreadFuture<Version> getReadVersion() override;
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ThreadFuture<Optional<Value>> get(const KeyRef& key, bool snapshot=false) override;
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ThreadFuture<Key> getKey(const KeySelectorRef& key, bool snapshot=false) override;
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ThreadFuture<Standalone<RangeResultRef>> getRange(const KeySelectorRef& begin, const KeySelectorRef& end, int limit, bool snapshot=false, bool reverse=false) override;
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ThreadFuture<Standalone<RangeResultRef>> getRange(const KeySelectorRef& begin, const KeySelectorRef& end, GetRangeLimits limits, bool snapshot=false, bool reverse=false) override;
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ThreadFuture<Standalone<RangeResultRef>> getRange(const KeyRangeRef& keys, int limit, bool snapshot=false, bool reverse=false) override;
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ThreadFuture<Standalone<RangeResultRef>> getRange( const KeyRangeRef& keys, GetRangeLimits limits, bool snapshot=false, bool reverse=false) override;
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ThreadFuture<Standalone<VectorRef<const char*>>> getAddressesForKey(const KeyRef& key) override;
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ThreadFuture<Standalone<StringRef>> getVersionstamp() override;
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void addReadConflictRange(const KeyRangeRef& keys) override;
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ThreadFuture<int64_t> getEstimatedRangeSizeBytes(const KeyRangeRef& keys) override;
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ThreadFuture<Standalone<VectorRef<KeyRef>>> getRangeSplitPoints(const KeyRangeRef& range,
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int64_t chunkSize) override;
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void atomicOp(const KeyRef& key, const ValueRef& value, uint32_t operationType) override;
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void set(const KeyRef& key, const ValueRef& value) override;
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void clear(const KeyRef& begin, const KeyRef& end) override;
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void clear(const KeyRangeRef& range) override;
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void clear(const KeyRef& key) override;
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ThreadFuture<Void> watch(const KeyRef& key) override;
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void addWriteConflictRange(const KeyRangeRef& keys) override;
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ThreadFuture<Void> commit() override;
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Version getCommittedVersion() override;
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ThreadFuture<int64_t> getApproximateSize() override;
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void setOption(FDBTransactionOptions::Option option, Optional<StringRef> value=Optional<StringRef>()) override;
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ThreadFuture<Void> onError(Error const& e) override;
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void reset() override;
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void addref() override { ThreadSafeReferenceCounted<MultiVersionTransaction>::addref(); }
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void delref() override { ThreadSafeReferenceCounted<MultiVersionTransaction>::delref(); }
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private:
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const Reference<MultiVersionDatabase> db;
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ThreadSpinLock lock;
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struct TransactionInfo {
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Reference<ITransaction> transaction;
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ThreadFuture<Void> onChange;
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};
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TransactionInfo transaction;
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TransactionInfo getTransaction();
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void updateTransaction();
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void setDefaultOptions(UniqueOrderedOptionList<FDBTransactionOptions> options);
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std::vector<std::pair<FDBTransactionOptions::Option, Optional<Standalone<StringRef>>>> persistentOptions;
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};
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struct ClientInfo : ThreadSafeReferenceCounted<ClientInfo> {
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ProtocolVersion protocolVersion;
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IClientApi *api;
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std::string libPath;
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bool external;
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bool failed;
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std::vector<std::pair<void (*)(void*), void*>> threadCompletionHooks;
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ClientInfo() : protocolVersion(0), api(nullptr), external(false), failed(true) {}
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ClientInfo(IClientApi *api) : protocolVersion(0), api(api), libPath("internal"), external(false), failed(false) {}
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ClientInfo(IClientApi *api, std::string libPath) : protocolVersion(0), api(api), libPath(libPath), external(true), failed(false) {}
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void loadProtocolVersion();
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bool canReplace(Reference<ClientInfo> other) const;
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};
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class MultiVersionApi;
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class MultiVersionDatabase final : public IDatabase, ThreadSafeReferenceCounted<MultiVersionDatabase> {
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public:
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struct DatabaseState;
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MultiVersionDatabase(MultiVersionApi *api, std::string clusterFilePath, Reference<IDatabase> db, bool openConnectors=true);
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~MultiVersionDatabase() override;
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Reference<ITransaction> createTransaction() override;
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void setOption(FDBDatabaseOptions::Option option, Optional<StringRef> value = Optional<StringRef>()) override;
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void addref() override { ThreadSafeReferenceCounted<MultiVersionDatabase>::addref(); }
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void delref() override { ThreadSafeReferenceCounted<MultiVersionDatabase>::delref(); }
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static Reference<IDatabase> debugCreateFromExistingDatabase(Reference<IDatabase> db);
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const Reference<DatabaseState>& getDbState() {return dbState;}
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ThreadFuture<Void> dbAvaliable();
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ThreadFuture<int64_t> rebootWorker(const StringRef& address, bool check, int duration) override;
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ThreadFuture<Void> forceRecoveryWithDataLoss(const StringRef& dcid) override;
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ThreadFuture<Void> createSnapshot(const StringRef& snapshot_command) override;
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private:
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struct Connector : ThreadCallback, ThreadSafeReferenceCounted<Connector> {
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Connector(Reference<DatabaseState> dbState, Reference<ClientInfo> client, std::string clusterFilePath) : dbState(dbState), client(client), clusterFilePath(clusterFilePath), connected(false), cancelled(false) {}
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void connect();
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void cancel();
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bool canFire(int notMadeActive) const override { return true; }
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void fire(const Void& unused, int& userParam) override;
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void error(const Error& e, int& userParam) override;
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const Reference<ClientInfo> client;
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const std::string clusterFilePath;
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const Reference<DatabaseState> dbState;
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ThreadFuture<Void> connectionFuture;
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Reference<IDatabase> candidateDatabase;
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Reference<ITransaction> tr;
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bool connected;
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bool cancelled;
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};
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public:
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struct DatabaseState : ThreadSafeReferenceCounted<DatabaseState> {
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DatabaseState();
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void stateChanged();
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void addConnection(Reference<ClientInfo> client, std::string clusterFilePath);
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void startConnections();
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void cancelConnections();
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Reference<IDatabase> db;
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const Reference<ThreadSafeAsyncVar<Reference<IDatabase>>> dbVar;
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ThreadFuture<Void> changed;
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bool cancelled;
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int currentClientIndex;
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std::vector<Reference<ClientInfo>> clients;
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std::vector<Reference<Connector>> connectionAttempts;
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std::vector<std::pair<FDBDatabaseOptions::Option, Optional<Standalone<StringRef>>>> options;
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UniqueOrderedOptionList<FDBTransactionOptions> transactionDefaultOptions;
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Mutex optionLock;
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};
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const Reference<DatabaseState> dbState;
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friend class MultiVersionTransaction;
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};
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class MultiVersionApi : public IClientApi {
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public:
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void selectApiVersion(int apiVersion) override;
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const char* getClientVersion() override;
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ThreadFuture<uint64_t> getServerProtocol(const char* clusterFilePath) override;
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void setNetworkOption(FDBNetworkOptions::Option option, Optional<StringRef> value = Optional<StringRef>()) override;
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void setupNetwork() override;
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void runNetwork() override;
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void stopNetwork() override;
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void addNetworkThreadCompletionHook(void (*hook)(void*), void *hookParameter) override;
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Reference<IDatabase> createDatabase(const char *clusterFilePath) override;
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static MultiVersionApi* api;
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Reference<ClientInfo> getLocalClient();
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void runOnExternalClients(std::function<void(Reference<ClientInfo>)>, bool runOnFailedClients=false);
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void updateSupportedVersions();
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bool callbackOnMainThread;
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bool localClientDisabled;
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static bool apiVersionAtLeast(int minVersion);
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private:
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MultiVersionApi();
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void loadEnvironmentVariableNetworkOptions();
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void disableMultiVersionClientApi();
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void setCallbacksOnExternalThreads();
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void addExternalLibrary(std::string path);
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void addExternalLibraryDirectory(std::string path);
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void disableLocalClient();
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void setSupportedClientVersions(Standalone<StringRef> versions);
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void setNetworkOptionInternal(FDBNetworkOptions::Option option, Optional<StringRef> value);
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Reference<ClientInfo> localClient;
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std::map<std::string, Reference<ClientInfo>> externalClients;
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bool networkStartSetup;
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volatile bool networkSetup;
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volatile bool bypassMultiClientApi;
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volatile bool externalClient;
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int apiVersion;
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Mutex lock;
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std::vector<std::pair<FDBNetworkOptions::Option, Optional<Standalone<StringRef>>>> options;
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std::map<FDBNetworkOptions::Option, std::set<Standalone<StringRef>>> setEnvOptions;
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volatile bool envOptionsLoaded;
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};
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#endif
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