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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/configstate.h>
#include <vespa/config/common/timingvalues.h>
#include <vespa/config/common/configvalue.h>
namespace config {
class IConfigHolder;
class ConfigResponse;
class ConfigRequest;
class ConfigKey;
class ConfigAgent
{
public:
using UP = std::unique_ptr<ConfigAgent>;
using duration = vespalib::duration;
virtual void handleResponse(const ConfigRequest & request, std::unique_ptr<ConfigResponse> response) = 0;
virtual duration getTimeout() const = 0;
virtual duration getWaitTime() const = 0;
virtual const ConfigState & getConfigState() const = 0;
virtual ~ConfigAgent() = default;
};
class FRTConfigAgent : public ConfigAgent
{
public:
FRTConfigAgent(std::shared_ptr<IConfigHolder> holder, const TimingValues & timingValues);
~FRTConfigAgent() override;
void handleResponse(const ConfigRequest & request, std::unique_ptr<ConfigResponse> response) override;
duration getTimeout() const override;
duration getWaitTime() const override;
const ConfigState & getConfigState() const override;
private:
void handleUpdatedGeneration(const ConfigKey & key, const ConfigState & newState, const ConfigValue & configValue);
void handleOKResponse(const ConfigRequest & request, std::unique_ptr<ConfigResponse> response);
void handleErrorResponse(const ConfigRequest & request, std::unique_ptr<ConfigResponse> response);
void setWaitTime(duration delay, int multiplier);
std::shared_ptr<IConfigHolder> _holder;
const TimingValues _timingValues;
ConfigState _configState;
ConfigValue _latest;
duration _waitTime;
uint64_t _numConfigured;
unsigned int _failedRequests;
duration _nextTimeout;
};
}
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