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/*
Copyright (C) 2012 Intel Corporation
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef PLUGINLOADER_H
#define PLUGINLOADER_H
#include <string>
#include <functional>
#include <dlfcn.h>
#include <iostream>
#include "abstractsource.h"
#include "abstractsink.h"
#include "abstractroutingengine.h"
#include "debugout.h"
#include "imainloop.h"
typedef void create_t(AbstractRoutingEngine*, map<string, string> );
typedef void* create_mainloop_t(int argc, char** argv);
typedef void* createRoutingEngine(void);
class PluginLoader
{
public:
PluginLoader(std::string configFile, int argc, char** argv);
~PluginLoader();
IMainLoop* mainloop();
std::string errorString();
void scanPluginDir(const std::string &);
bool readPluginConfig(const std::string & configData);
private: ///methods:
bool loadPlugin(string pluginName, std::map<std::string, std::string> config)
{
DebugOut()<<"Loading plugin: "<<pluginName<<endl;
void* handle = dlopen(pluginName.c_str(), RTLD_LAZY);
if(!handle)
{
mErrorString = dlerror();
DebugOut(DebugOut::Error)<<"error opening plugin: "<<pluginName<<" in "<<__FILE__<<" - "<<__FUNCTION__<<":"<<__LINE__<<" "<<mErrorString<<endl;
return false;
}
openHandles.push_back(handle);
f_create = (create_t *)dlsym(handle, "create");
if(f_create)
{
f_create(routingEngine, config);
return true;
}
return false;
}
IMainLoop* loadMainLoop(string pluginName, int argc, char** argv)
{
DebugOut()<<"Loading plugin: "<<pluginName<<endl;
void* handle = dlopen(pluginName.c_str(), RTLD_LAZY);
if(!handle)
{
mErrorString = dlerror();
DebugOut(DebugOut::Error)<<"error opening plugin: "<<pluginName<<" in "<<__FILE__<<" - "<<__FUNCTION__<<":"<<__LINE__<<" "<<mErrorString<<endl;
return nullptr;
}
openHandles.push_back(handle);
m_create = (create_mainloop_t *)dlsym(handle, "create");
if(m_create)
{
void* obj = m_create(argc, argv);
return static_cast<IMainLoop*>( obj );
}
return nullptr;
}
AbstractRoutingEngine* loadRoutingEngine(string pluginName)
{
DebugOut()<<"Loading plugin: "<<pluginName<<endl;
void* handle = dlopen(pluginName.c_str(), RTLD_LAZY);
if(!handle)
{
mErrorString = dlerror();
cerr<<"error opening plugin: "<<pluginName<<" in "<<__FILE__<<" - "<<__FUNCTION__<<":"<<__LINE__<<" "<<mErrorString<<endl;
return nullptr;
}
openHandles.push_back(handle);
r_create = (createRoutingEngine *)dlsym(handle, "create");
if(r_create)
{
void* obj = r_create();
return static_cast<AbstractRoutingEngine*>( obj );
}
return nullptr;
}
private:
std::string mPluginPath;
std::string mErrorString;
AbstractRoutingEngine* routingEngine;
create_t * f_create;
create_mainloop_t * m_create;
createRoutingEngine * r_create;
IMainLoop* mMainLoop;
std::vector<void*> openHandles;
};
#endif // PLUGINLOADER_H
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