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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 <vespa/config/common/configkey.h>
#include <vespa/config/common/source.h>
#include <vespa/fnet/frt/invoker.h>
namespace config {
class FRTConfigRequestFactory;
class ConnectionFactory;
class ConfigAgent;
class FRTConfigRequest;
/**
* Class for sending and receiving config requests via FRT.
*/
class FRTSource : public Source,
public FRT_IRequestWait
{
public:
FRTSource(std::shared_ptr<ConnectionFactory> connectionFactory, const FRTConfigRequestFactory & requestFactory, std::unique_ptr<ConfigAgent> agent, const ConfigKey & key);
~FRTSource() override;
void RequestDone(FRT_RPCRequest * request) override;
void close() override;
void reload(int64_t generation) override;
void getConfig() override;
private:
class CleanupGuard;
void scheduleNextGetConfig();
void erase(FRT_RPCRequest *);
std::shared_ptr<FRTConfigRequest> find(FRT_RPCRequest *);
using RequestMap = std::map<FRT_RPCRequest *, std::shared_ptr<FRTConfigRequest>>;
std::shared_ptr<ConnectionFactory> _connectionFactory;
const FRTConfigRequestFactory & _requestFactory;
std::unique_ptr<ConfigAgent> _agent;
const ConfigKey _key;
std::mutex _lock; // Protects _inflight, _task and _state
std::condition_variable _cond;
RequestMap _inflight;
std::unique_ptr<FNET_Task> _task;
enum class State : uint8_t { OPEN, CLOSING, CLOSED } _state;
};
} // namespace config
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