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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "domainconfig.h"
#include <vespa/vespalib/util/threadstackexecutor.h>
#include <vespa/document/util/queue.h>
#include <vespa/fnet/frt/invokable.h>
#include <shared_mutex>
#include <atomic>
#include <thread>
class FRT_Supervisor;
class FNET_Transport;
namespace search::common { class FileHeaderContext; }
namespace search::transactionlog {
class TransLogServerExplorer;
class Domain;
class TransLogServer : private FRT_Invokable, public WriterFactory
{
public:
friend class TransLogServerExplorer;
using SP = std::shared_ptr<TransLogServer>;
using DomainSP = std::shared_ptr<Domain>;
TransLogServer(FNET_Transport & transport, const vespalib::string &name, int listenPort, const vespalib::string &baseDir,
const common::FileHeaderContext &fileHeaderContext, const DomainConfig & cfg, size_t maxThreads);
TransLogServer(FNET_Transport & transport, const vespalib::string &name, int listenPort, const vespalib::string &baseDir,
const common::FileHeaderContext &fileHeaderContext, const DomainConfig & cfg);
TransLogServer(FNET_Transport & transport, const vespalib::string &name, int listenPort, const vespalib::string &baseDir,
const common::FileHeaderContext &fileHeaderContext);
~TransLogServer() override;
DomainStats getDomainStats() const;
std::shared_ptr<Writer> getWriter(const vespalib::string & domainName) const override;
TransLogServer & setDomainConfig(const DomainConfig & cfg);
private:
void request_stop();
void run();
void exportRPC(FRT_Supervisor & supervisor);
void relayToThreadRPC(FRT_RPCRequest *req);
void createDomain(FRT_RPCRequest *req);
void deleteDomain(FRT_RPCRequest *req);
void openDomain(FRT_RPCRequest *req);
void listDomains(FRT_RPCRequest *req);
void domainStatus(FRT_RPCRequest *req);
void domainCommit(FRT_RPCRequest *req);
void domainSessionRun(FRT_RPCRequest *req);
void domainPrune(FRT_RPCRequest *req);
void domainVisit(FRT_RPCRequest *req);
void domainSessionClose(FRT_RPCRequest *req);
void domainSync(FRT_RPCRequest *req);
std::vector<vespalib::string> getDomainNames();
DomainSP findDomain(vespalib::stringref name) const;
vespalib::string dir() const { return _baseDir + "/" + _name; }
vespalib::string domainList() const { return dir() + "/" + _name + ".domains"; }
using DomainList = std::map<vespalib::string, DomainSP >;
using ReadGuard = std::shared_lock<std::shared_mutex>;
using WriteGuard = std::unique_lock<std::shared_mutex>;
bool running() const { return !_closed.load(std::memory_order_relaxed); }
vespalib::string _name;
vespalib::string _baseDir;
DomainConfig _domainConfig;
vespalib::ThreadStackExecutor _executor;
std::thread _thread;
std::unique_ptr<FRT_Supervisor> _supervisor;
DomainList _domains;
mutable std::shared_mutex _domainMutex;; // Protects _domains
std::condition_variable _domainCondition;
std::mutex _fileLock; // Protects the creating and deleting domains including file system operations.
document::Queue<FRT_RPCRequest *> _reqQ;
const common::FileHeaderContext &_fileHeaderContext;
std::atomic<bool> _closed;
};
}
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