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/*
* This file is part of PowerDNS or dnsdist.
* Copyright -- PowerDNS.COM B.V. and its contributors
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* In addition, for the avoidance of any doubt, permission is granted to
* link this program with OpenSSL and to (re)distribute the binaries
* produced as the result of such linking.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#pragma once
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <atomic>
#include <condition_variable>
#include <queue>
#include <thread>
#include "iputils.hh"
class RemoteLoggerInterface
{
public:
virtual ~RemoteLoggerInterface() {};
virtual void queueData(const std::string& data) = 0;
virtual std::string toString() const = 0;
};
class RemoteLogger : public RemoteLoggerInterface
{
public:
RemoteLogger(const ComboAddress& remote, uint16_t timeout=2, uint64_t maxQueuedEntries=100, uint8_t reconnectWaitTime=1, bool asyncConnect=false);
virtual ~RemoteLogger();
virtual void queueData(const std::string& data) override;
virtual std::string toString() const override
{
return "RemoteLogger to " + d_remote.toStringWithPort();
}
void stop()
{
d_exiting = true;
}
uint64_t getGeneration() const
{
return d_generation;
}
void setGeneration(uint64_t newGeneration)
{
d_generation = newGeneration;
}
private:
void busyReconnectLoop();
bool reconnect();
void worker();
std::queue<std::string> d_writeQueue;
std::mutex d_writeMutex;
std::condition_variable d_queueCond;
ComboAddress d_remote;
uint64_t d_maxQueuedEntries;
uint64_t d_generation{0};
int d_socket{-1};
uint16_t d_timeout;
uint8_t d_reconnectWaitTime;
std::atomic<bool> d_exiting{false};
bool d_asyncConnect{false};
bool d_connected{false};
std::thread d_thread;
};
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