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/***************************************************************************
*
* Copyright 2012 BMW Car IT GmbH
*
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
****************************************************************************/
#include "PluginManager.h"
#include "Configuration.h"
#include "Log.h"
#include "IPlugin.h"
#include <IScene.h>
#include <dirent.h>
#include <errno.h>
#include <dlfcn.h>
#include <stdlib.h>
StaticPluginCreateFuncList PluginManager::mStaticPluginCreateFuncList;
//===========================================================================
// register statically linked plugins (configured by build system)
//===========================================================================
STATIC_PLUGIN_REGISTRATION
//===========================================================================
// class implementation
//===========================================================================
PluginManager::PluginManager(ICommandExecutor& executor, Configuration& config)
: mExecutor(executor)
, mConfiguration(config)
{
LOG_DEBUG("PluginManager", "loading plugins from " << mConfiguration.getPluginPath());
// create static plugins
createStaticallyLinkedPlugins();
#ifndef WITH_STATIC_LIBRARIES
// create dynamic plugins
getAllFilesInPluginPath(mConfiguration.getPluginPath());
createDynamicallyLinkedPlugins();
#endif
LOG_INFO("PluginManager", "created " << mPluginList.size() << " plugins");
}
PluginManager::~PluginManager()
{
PluginList::iterator iter = mPluginList.begin();
PluginList::iterator iterEnd = mPluginList.end();
for (; iter != iterEnd; ++iter)
{
IPlugin* plugin = *iter;
if (plugin)
{
LOG_INFO("PluginManager", "plugin " << plugin->pluginGetName() << " destroyed");
delete plugin;
}
}
mPluginList.clear();
}
void PluginManager::getRendererList(RendererList& list)
{
PluginList::const_iterator iter = mPluginList.begin();
PluginList::const_iterator iterEnd = mPluginList.end();
for (; iter != iterEnd; ++iter)
{
IPlugin* plugin = *iter;
ilmPluginApi api = plugin->pluginGetApi();
if (PLUGIN_IS_RENDERER(api))
{
IRenderer* renderer = dynamic_cast<IRenderer*>(plugin);
list.push_back(renderer);
}
}
}
void PluginManager::getHealthMonitorList(HealthMonitorList& list)
{
PluginList::const_iterator iter = mPluginList.begin();
PluginList::const_iterator iterEnd = mPluginList.end();
for (; iter != iterEnd; ++iter)
{
IPlugin* plugin = *iter;
ilmPluginApi api = plugin->pluginGetApi();
if (PLUGIN_IS_HEALTHMONITOR(api))
{
IHealthMonitor* monitor = dynamic_cast<IHealthMonitor*>(plugin);
if (monitor)
{
list.push_back(monitor);
}
}
}
}
void PluginManager::getSceneProviderList(SceneProviderList& list)
{
PluginList::const_iterator iter = mPluginList.begin();
PluginList::const_iterator iterEnd = mPluginList.end();
for (; iter != iterEnd; ++iter)
{
IPlugin* plugin = *iter;
ilmPluginApi api = plugin->pluginGetApi();
if (PLUGIN_IS_SCENEPROVIDER(api))
{
ISceneProvider* sceneprovider = dynamic_cast<ISceneProvider*>(plugin);
list.push_back(sceneprovider);
}
}
}
void PluginManager::getCommunicatorList(CommunicatorList& list)
{
PluginList::const_iterator iter = mPluginList.begin();
PluginList::const_iterator iterEnd = mPluginList.end();
for (; iter != iterEnd; ++iter)
{
IPlugin* plugin = *iter;
ilmPluginApi api = plugin->pluginGetApi();
if (PLUGIN_IS_COMMUNICATOR(api))
{
ICommunicator* comm = dynamic_cast<ICommunicator*>(plugin);
list.push_back(comm);
}
}
}
bool PluginManager::registerStaticPluginCreateFunction(StaticPluginCreateFunc func)
{
bool result = false;
if (func)
{
mStaticPluginCreateFuncList.push_back(func);
result = true;
}
return result;
}
void PluginManager::createStaticallyLinkedPlugins()
{
StaticPluginCreateFuncList::iterator iter = mStaticPluginCreateFuncList.begin();
StaticPluginCreateFuncList::iterator iterEnd = mStaticPluginCreateFuncList.end();
for (; iter != iterEnd; ++iter)
{
StaticPluginCreateFunc func = *iter;
IPlugin* plugin = (*func)(mExecutor, mConfiguration);
LOG_INFO("PluginManager", "creating plugin " << plugin->pluginGetName() << " (static linking)");
mPluginList.push_back(plugin);
}
}
void PluginManager::getAllFilesInPluginPath(std::string path)
{
DIR *directory = opendir(path.c_str());
struct dirent *itemInDirectory = 0;
while (directory && (itemInDirectory = readdir(directory)))
{
std::string entryName = itemInDirectory->d_name;
std::string fullPath = path + "/" + entryName;
if (entryName.at(0) == '.')
{
continue;
}
mFileList.push_back(fullPath);
LOG_DEBUG("PluginManager", "considering " << fullPath);
getAllFilesInPluginPath(fullPath);
}
closedir(directory);
}
void PluginManager::createDynamicallyLinkedPlugins()
{
FileList::const_iterator iter = mFileList.begin();
FileList::const_iterator iterEnd = mFileList.end();
for (; iter != iterEnd; ++iter)
{
IPlugin* plugin = createDynamicallyLinkedPlugin(*iter);
if (plugin)
{
mPluginList.push_back(plugin);
}
}
}
IPlugin* PluginManager::createDynamicallyLinkedPlugin(std::string path)
{
IPlugin* returnValue = NULL;
// open library
void *libraryHandle;
dlerror(); // Clear any existing error
libraryHandle = dlopen(path.c_str(), RTLD_NOW | RTLD_GLOBAL);
const char* dlopen_error = dlerror();
if (dlopen_error)
{
return NULL;
}
// load entry point
union
{
void* data;
IPlugin* (*createFunc)(ICommandExecutor&, Configuration&);
} convertUnion;
int cutBegin = path.find_last_of('/') + 4; // remove '*/lib' from name
int cutEnd = path.find_first_of('.', cutBegin); // remove '.extension' from name
std::string createFunctionName = "create";
createFunctionName += path.substr(cutBegin, cutEnd - cutBegin);
convertUnion.data = dlsym(libraryHandle, createFunctionName.c_str());
// create plugin instance from entry point
const char* dlsym_error = dlerror();
if (convertUnion.data && !dlsym_error)
{
returnValue = convertUnion.createFunc(mExecutor, mConfiguration);
LOG_INFO("PluginManager", "creating plugin " << returnValue->pluginGetName() << " (dynamic linking)");
}
else
{
LOG_DEBUG("PluginManager", "not a valid Plugin: " << path << ": " << dlsym_error);
dlclose(libraryHandle);
returnValue = NULL;
}
return returnValue;
}
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