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/*
* Author: Matthias Behr, mbehr (a) mcbehr dot de
* */
#ifndef __push_data_hpp_
#define __push_data_hpp_
#include <cstdint>
#include <list>
#include <pthread.h>
#include <queue>
#include <string>
#include <unordered_map>
#include <utility> // for std::pair
// PushDataList provides a thread safe list
class PushDataList {
public:
typedef std::pair<int64_t, double> DataTuple;
typedef std::queue<DataTuple> DataQueue;
typedef std::unordered_map<std::string, DataQueue> DataMap;
PushDataList();
~PushDataList();
void add(const std::string &uuid, const int64_t &time_ms, const double &value);
DataMap *waitForData(); // blocks infinite until data is available. returned object is owned by
// caller! must be deleted after usage!
protected:
DataMap *_next;
pthread_mutex_t _map_mutex;
pthread_cond_t _cond;
};
// var to a global/single instance. needs to be initialzed e.g. in main()
extern PushDataList *pushDataList;
class PushDataServer {
public:
PushDataServer(struct json_object *option);
PushDataServer(const PushDataServer &) = delete; // no copy constructor!
~PushDataServer();
bool waitAndSendOnceToAll();
protected:
typedef struct {
char *data;
size_t size;
} CURLresponse;
std::string generateJson(PushDataList::DataMap &dataMap);
bool send(const std::string &middleware, const std::string &datastr);
friend class PushDataServerTest;
static size_t curl_custom_write_callback(void *ptr, size_t size, size_t nmemb, void *data);
typedef std::list<std::string> MiddlewareList;
MiddlewareList _middlewareList;
struct curl_slist *_headers;
};
void *push_data_thread(void *arg);
void end_push_data_thread(); // notifies the thread to stop, does not wait/join for the thread!
#endif
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