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/* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* DataDifferential Utility Library
*
* Copyright (C) 2011 Data Differential, http://datadifferential.com/
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
*
* * The names of its contributors may not be used to endorse or
* promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#pragma once
#include <cassert>
#include <cerrno>
#include <cstddef>
#include <cstdio>
#include <netinet/in.h>
#include <string>
#include <sys/socket.h>
#include "util/operation.hpp"
struct addrinfo;
namespace datadifferential {
namespace util {
class Instance
{
private:
enum connection_state_t {
NOT_WRITING,
NEXT_CONNECT_ADDRINFO,
CONNECT,
CONNECTING,
CONNECTED,
WRITING,
READING,
FINISHED
};
std::string _last_error;
public: // Callbacks
class Finish {
public:
virtual ~Finish() { }
virtual bool call(const bool, const std::string &)= 0;
};
public:
Instance(const std::string& hostname_arg, const std::string& service_arg);
Instance(const std::string& hostname_arg, const in_port_t port_arg);
~Instance();
bool run();
void set_finish(Finish *arg)
{
_finish_fn= arg;
}
void push(util::Operation *next)
{
_operations.push_back(next);
}
private:
void close_socket();
void free_addrinfo();
bool more_to_read() const;
std::string _host;
std::string _service;
int _sockfd;
connection_state_t state;
struct addrinfo *_addrinfo;
struct addrinfo *_addrinfo_next;
Finish *_finish_fn;
Operation::vector _operations;
};
} /* namespace util */
} /* namespace datadifferential */
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