Examples

Redis Client

#include <cpp_redis/cpp_redis>

#include <iostream>

int
main(void) {
  //! Enable logging
  cpp_redis::active_logger = std::unique_ptr<cpp_redis::logger>(new cpp_redis::logger);

  cpp_redis::redis_client client;

  client.connect("127.0.0.1", 6379, [](cpp_redis::redis_client&) {
    std::cout << "client disconnected (disconnection handler)" << std::endl;
  });

  // same as client.send({ "SET", "hello", "42" }, ...)
  client.set("hello", "42", [](cpp_redis::reply& reply) {
    std::cout << "set hello 42: " << reply << std::endl;
    // if (reply.is_string())
    //   do_something_with_string(reply.as_string())
  });

  // same as client.send({ "DECRBY", "hello", 12 }, ...)
  client.decrby("hello", 12, [](cpp_redis::reply& reply) {
    std::cout << "decrby hello 12: " << reply << std::endl;
    // if (reply.is_integer())
    //   do_something_with_integer(reply.as_integer())
  });

  // same as client.send({ "GET", "hello" }, ...)
  client.get("hello", [](cpp_redis::reply& reply) {
    std::cout << "get hello: " << reply << std::endl;
    // if (reply.is_string())
    //   do_something_with_string(reply.as_string())
  });

  // commands are pipelined and only sent when client.commit() is called
  // client.commit();

  // synchronous commit, no timeout
  client.sync_commit();

  // synchronous commit, timeout
  // client.sync_commit(std::chrono::milliseconds(100));

  return 0;
}

Redis Subscriber

#include <cpp_redis/cpp_redis>

#include <iostream>
#include <signal.h>

volatile std::atomic_bool should_exit(false);

void
sigint_handler(int) {
  should_exit = true;
}

int
main(void) {
  //! Enable logging
  cpp_redis::active_logger = std::unique_ptr<cpp_redis::logger>(new cpp_redis::logger);

  cpp_redis::redis_subscriber sub;

  sub.connect("127.0.0.1", 6379, [](cpp_redis::redis_subscriber&) {
    std::cout << "sub disconnected (disconnection handler)" << std::endl;
    should_exit = true;
  });

  sub.subscribe("some_chan", [](const std::string& chan, const std::string& msg) {
    std::cout << "MESSAGE " << chan << ": " << msg << std::endl;
  });
  sub.psubscribe("*", [](const std::string& chan, const std::string& msg) {
    std::cout << "PMESSAGE " << chan << ": " << msg << std::endl;
  });
  sub.commit();

  signal(SIGINT, &sigint_handler);
  while (!should_exit) {}

  return 0;
}

Logger

#include <cpp_redis/cpp_redis>

#include <iostream>

class my_logger : public cpp_redis::logger_iface {
public:
  //! ctor & dtor
  my_logger(void) = default;
  ~my_logger(void) = default;

  //! copy ctor & assignment operator
  my_logger(const my_logger&) = default;
  my_logger& operator=(const my_logger&) = default;

public:
  void debug(const std::string& msg, const std::string& file, unsigned int line) {
    std::cout << "debug: " << msg << " @ " << file << ":" << line << std::endl;
  }

  void info(const std::string& msg, const std::string& file, unsigned int line) {
    std::cout << "info: " << msg << " @ " << file << ":" << line << std::endl;
  }

  void warn(const std::string& msg, const std::string& file, unsigned int line) {
    std::cout << "warn: " << msg << " @ " << file << ":" << line << std::endl;
  }

  void error(const std::string& msg, const std::string& file, unsigned int line) {
    std::cerr << "error: " << msg << " @ " << file << ":" << line << std::endl;
  }
};


int
main(void) {
  //! By default, no logging
  //! Force logger call, just for the example (you will never have to do that by yourself)
  std::cout << "By default: no logging" << std::endl;
  _CPP_REDIS_LOG(debug, "This is a debug message");
  _CPP_REDIS_LOG(info, "This is an info message");
  _CPP_REDIS_LOG(warn, "This is a warn message");
  _CPP_REDIS_LOG(error, "This is an error message");
  std::cout << std::endl;

  //! Use the default logger, provided with the library
  cpp_redis::active_logger = std::unique_ptr<cpp_redis::logger>(new cpp_redis::logger);
  //! Force logger call, just for the example (you will never have to do that by yourself)
  std::cout << "With the library provided logger" << std::endl;
  _CPP_REDIS_LOG(debug, "This is a debug message");
  _CPP_REDIS_LOG(info, "This is an info message");
  _CPP_REDIS_LOG(warn, "This is a warn message");
  _CPP_REDIS_LOG(error, "This is an error message");
  std::cout << std::endl;

  //! Use your custom logger
  cpp_redis::active_logger = std::unique_ptr<my_logger>(new my_logger);
  //! Force logger call, just for the example (you will never have to do that by yourself)
  std::cout << "With an example of custom logger" << std::endl;
  _CPP_REDIS_LOG(debug, "This is a debug message");
  _CPP_REDIS_LOG(info, "This is an info message");
  _CPP_REDIS_LOG(warn, "This is a warn message");
  _CPP_REDIS_LOG(error, "This is an error message");
  std::cout << std::endl;

  return 0;
}