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//------------------------------------------------------------------------------
// Author: Ilya Storozhilov
// Description: JSON analyzer plugin
// Copyright (c) 2013-2014 EPAM Systems
//------------------------------------------------------------------------------
/*
This file is part of Nfstrace.
Nfstrace is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, version 2 of the License.
Nfstrace 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 Nfstrace. If not, see <http://www.gnu.org/licenses/>.
*/
//------------------------------------------------------------------------------
#include "api/plugin_api.h" // include plugin development definitions
#include "json_analyzer.h"
//------------------------------------------------------------------------------
static constexpr int DefaultPort = 8888;
static constexpr const char * DefaultHost = IpEndpoint::WildcardAddress;
static constexpr std::size_t DefaultWorkersAmount = 10U;
static constexpr int DefaultBacklog = 15;
static constexpr std::size_t DefaultMaxServingDurationMs = 500U;
extern "C"
{
const char* usage()
{
return "host - Network interface to listen (default is to listen all interfaces)\n"
"port - IP-port to bind to (default is 8888)\n"
"workers - Amount of worker threads (default is 10)\n"
"duration - Max serving duration in milliseconds (default is 500 ms)\n"
"backlog - Listen backlog (default is 15)";
}
IAnalyzer* create(const char* opts)
{
// Initializing plugin options with default values
int backlog = DefaultBacklog;
std::size_t maxServingDurationMs = DefaultMaxServingDurationMs;
std::string host{DefaultHost};
int port = DefaultPort;
std::size_t workersAmount = DefaultWorkersAmount;
// Parising plugin options
enum
{
BACKLOG_SUBOPT_INDEX = 0,
DURATION_SUBOPT_INDEX,
HOST_SUBOPT_INDEX,
PORT_SUBOPT_INDEX,
WORKERS_SUBOPT_INDEX
};
char backlogSubOptName[] = "backlog";
char durationSubOptName[] = "duration";
char hostSubOptName[] = "host";
char portSubOptName[] = "port";
char workersSubOptName[] = "workers";
char* const tokens[] =
{
backlogSubOptName,
durationSubOptName,
hostSubOptName,
portSubOptName,
workersSubOptName,
NULL
};
std::size_t optsLen = strlen(opts);
std::vector<char> optsBuf{opts, opts + optsLen + 2};
char* optionp = &optsBuf[0];
char* valuep;
int optIndex;
while ((optIndex = getsubopt(&optionp, tokens, &valuep)) >= 0)
{
try
{
switch (optIndex)
{
case BACKLOG_SUBOPT_INDEX:
backlog = std::stoi(valuep);
break;
case DURATION_SUBOPT_INDEX:
maxServingDurationMs = std::stoul(valuep);
break;
case HOST_SUBOPT_INDEX:
host = valuep;
break;
case PORT_SUBOPT_INDEX:
port = std::stoi(valuep);
break;
case WORKERS_SUBOPT_INDEX:
workersAmount = std::stoul(valuep);
break;
default:
throw std::runtime_error{std::string{"Invalid suboption index: "} + std::to_string(optIndex)};
}
}
catch (std::logic_error& e)
{
throw std::runtime_error{std::string{"Invalid value provided for '"} + tokens[optIndex] + "' suboption"};
}
}
// Creating and returning plugin
return new JsonAnalyzer{workersAmount, port, host, maxServingDurationMs, backlog};
}
void destroy(IAnalyzer* instance)
{
delete instance;
}
NST_PLUGIN_ENTRY_POINTS (&usage, &create, &destroy, nullptr)
} //extern "C"
//------------------------------------------------------------------------------
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