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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
*/
#include "pluginloader.h"
#include "glibmainloop.h"
#include <json.h>
#include <iostream>
#include <stdexcept>
#include <boost/concept_check.hpp>
//#include <json-glib/json-glib.h>
using namespace std;
/********************************************
* Example JSON config:
* {
* sources: [ path1, path2, path3 ]
* sinks: [ path1, path2, path3 ]
* }
*
**********************************************/
std::string get_file_contents(const char *filename)
{
//FILE *in = fopen(filename,"r");
std::ifstream in(filename, std::ios::in);
std::string output;
std::string line;
while(in.good())
{
getline(in,line);
output.append(line);
}
return output;
}
PluginLoader::PluginLoader(string configFile, AbstractRoutingEngine* re, int argc, char** argv): f_create(NULL), routingEngine(re), mMainLoop(nullptr)
{
DebugOut()<<"Loading config file: "<<configFile<<endl;
json_object *rootobject;
json_tokener *tokener = json_tokener_new();
std::string configBuffer = get_file_contents(configFile.c_str());
if(configBuffer == "")
{
throw std::runtime_error("No config or config empty");
}
enum json_tokener_error err;
do
{
rootobject = json_tokener_parse_ex(tokener, configBuffer.c_str(),configBuffer.length());
} while ((err = json_tokener_get_error(tokener)) == json_tokener_continue);
if (err != json_tokener_success)
{
fprintf(stderr, "Error: %s\n", json_tokener_error_desc(err));
// Handle errors, as appropriate for your application.
}
if (tokener->char_offset < configFile.length()) // XXX shouldn't access internal fields
{
// Handle extra characters after parsed object as desired.
// e.g. issue an error, parse another object from that point, etc...
}
//DebugOut()<<"Config members: "<<json_reader_count_members(reader)<<endl;
json_object *mainloopobject = json_object_object_get(rootobject,"mainloop");
if (mainloopobject)
{
/// there is a mainloop entry. Load the plugin:
string mainloopstr = string(json_object_get_string(mainloopobject));
mMainLoop = loadMainLoop(mainloopstr,argc, argv);
if(!mMainLoop)
{
DebugOut(0)<<"Failed to load main loop plugin."<<endl;
}
}
else if(!mMainLoop)
{
/// there is no mainloop entry, use default glib
DebugOut()<<"No mainloop specified in config. Using glib by default."<<endl;
mMainLoop = new GlibMainLoop(argc,argv);
}
json_object *sourcesobject = json_object_object_get(rootobject,"sources");
if(!sourcesobject)
{
DebugOut()<<"Error getting sources member: "<<endl;
throw std::runtime_error("Error getting sources member");
}
//g_assert(json_reader_is_array(reader));
g_assert(json_object_get_type(sourcesobject)==json_type_array);
array_list *sourceslist = json_object_get_array(sourcesobject);
if (!sourceslist)
{
DebugOut() << "Error getting source list" << endl;
throw std::runtime_error("Error getting sources list");
}
for(int i=0; i < array_list_length(sourceslist); i++)
{
json_object *obj = (json_object*)array_list_get_idx(sourceslist,i); //This is an object
std::map<std::string, std::string> configurationMap;
json_object_object_foreach(obj, key, val)
{
string valstr = json_object_get_string(val);
DebugOut() << "plugin config key: " << key << "value:" << valstr << endl;
configurationMap[key] = valstr;
}
json_object *pathobject = json_object_object_get(obj,"path");
string path = string(json_object_get_string(pathobject));
AbstractSource* plugin = loadPlugin<AbstractSource*>(path,configurationMap);
if(plugin != nullptr)
{
mSources.push_back(plugin);
}
json_object_put(pathobject);
}
DebugOut() << "Trying to free list" << endl;
array_list_free(sourceslist);
DebugOut() << "Trying to free obj" << endl;
//json_object_put(sourcesobject);
DebugOut() << "Done first" << endl;
///read the sinks:
json_object *sinksobject = json_object_object_get(rootobject,"sinks");
if (!sinksobject)
{
DebugOut() << "Error getting sink object" << endl;
throw std::runtime_error("Error getting sink object");
}
array_list *sinkslist = json_object_get_array(sinksobject);
if (!sinkslist)
{
DebugOut() << "Error getting sink list" << endl;
throw std::runtime_error("Error getting sink list");
}
for(int i=0; i < array_list_length(sinkslist); i++)
{
json_object *obj = (json_object*)array_list_get_idx(sinkslist,i);
std::map<std::string, std::string> configurationMap;
json_object_object_foreach(obj, key, val)
{
string valstr = json_object_get_string(val);
DebugOut() << "plugin config key: " << key << "value:" << valstr << endl;
configurationMap[key] = valstr;
}
string path = configurationMap["path"];
AbstractSinkManager* plugin = loadPlugin<AbstractSinkManager*>(path, configurationMap);
if(plugin == nullptr)
{
throw std::runtime_error("plugin is not a SinkManager");
}
}
DebugOut() << "Trying to free obj" << endl;
json_object_put(sinksobject);
DebugOut() << "Done" << endl;
///TODO: this will probably explode:
//if(error) g_error_free(error);
//g_object_unref(reader);
//g_object_unref(parser);
//*/
}
PluginLoader::~PluginLoader()
{
}
SinkList PluginLoader::sinks()
{
return mSinks;
}
IMainLoop *PluginLoader::mainloop()
{
return mMainLoop;
}
SourceList PluginLoader::sources()
{
return mSources;
}
std::string PluginLoader::errorString()
{
return mErrorString;
}
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