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MQTTPusher.h 2.58 KB
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/*
 * MQTTPusher.h
 *
 *  Created on: 13.12.2017
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 *      Author: Michael Ott (original), Micha Mueller
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 */

#ifndef MQTTPUSHER_H_
#define MQTTPUSHER_H_

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#define DCDB_MAP "/DCDB_MAP/"
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#define PUSHER_IDLETIME 1000000000
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#include <mosquitto.h>
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#include <map>
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#include "PluginManager.h"
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#include "sensorbase.h"
#include "../analytics/AnalyticsManager.h"
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enum msgCap_t {DISABLED = 1, ENABLED = 2, MINIMUM = 3};

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/**
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 * Class responsible for collecting values from the sensors and pushing them to the database.
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 */
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class MQTTPusher {
public:
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	MQTTPusher(int brokerPort, const std::string& brokerHost, const std::string& sensorPattern, int qosLevel,
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			   pusherPluginStorage_t& plugins, an_pluginVector_t& aPlugins, int maxNumberOfMessages, unsigned int maxInflightMsgNum, unsigned int maxQueuedMsgNum);
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	virtual ~MQTTPusher();

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	/**
	 * @brief MQTTPusher's main execution loop.
	 *
	 * @details If MQTTPusher is started this function runs indefinitely until
	 *          a call to stop(). Execution of the main loop can be halted and
	 *          continued with halt() and cont() respectively.
	 */
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	void push();
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	/**
	 * @brief
	 *
	 * @return
	 */
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	bool sendMappings();
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	/**
	 * @brief Start MQTTPusher's push loop.
	 */
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	void start() {
		_keepRunning = true;
	}

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	/**
	 * @brief Stop MQTTPusher's push loop and terminate its execution.
	 */
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	void stop() {
		_keepRunning = false;
	}

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	/**
	 * @brief Blocking call to pause MQTTPusher's push loop.
	 *
	 * @details Instructs MQTTPusher to pause its push loop and blocks until
	 *          MQTTPusher is actually paused or a timeout occurred. On a
	 *          timeout execution of MQTTPusher is continued.
	 *
	 * @param timeout Time in seconds to wait for MQTTPusher to finish its
	 *                current push cycle.
	 *
	 * @return True if MQTTPusher was succesfully paused, false if a timeout
	 *         occurred and MQTTPusher still runs.
	 */
	bool halt(unsigned short timeout = 5);
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	/**
	 * @brief Continue MQTTPusher's push loop.
	 */
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	void cont() {
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		computeMsgRate();
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		_doHalt = false;
	}

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private:
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	int sendReadings(SensorBase& s, reading_t* reads, std::size_t& totalCount);
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	void computeMsgRate();
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	int _qosLevel;
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	int _brokerPort;
	std::string _brokerHost;
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	std::string _sensorPattern;
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	pusherPluginStorage_t& _plugins;
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	an_pluginVector_t& _analyticsPlugins;
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	struct mosquitto* _mosq;
	bool _connected;
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	bool _keepRunning;
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	msgCap_t _msgCap;
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	bool _doHalt;
	bool _halted;
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	int _maxNumberOfMessages;
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	unsigned int _maxInflightMsgNum;
	unsigned int _maxQueuedMsgNum;
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	boost::log::sources::severity_logger<boost::log::trivial::severity_level> lg;
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};

#endif /* MQTTPUSHER_H_ */