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/** @file
A brief file description
@section license License
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements. See the NOTICE file
distributed with this work for additional information
regarding copyright ownership. The ASF licenses this file
to you 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 <dlfcn.h>
#include "HandlerManager.h"
using std::map;
using std::string;
using namespace EsiLib;
#define CLASS_NAME "HandlerManager"
const char *const HandlerManager::FACTORY_FUNCTION_NAME = "createSpecialIncludeHandler";
void
HandlerManager::loadObjects(const Utils::KeyValueMap &handlers)
{
ModuleHandleMap::iterator path_map_iter;
for (Utils::KeyValueMap::const_iterator id_map_iter = handlers.begin(); id_map_iter != handlers.end(); ++id_map_iter) {
const string &id = id_map_iter->first;
const string &path = id_map_iter->second;
path_map_iter = _path_to_module_map.find(path);
if (path_map_iter != _path_to_module_map.end()) {
// we have already loaded this object; just point id to original handle
_id_to_function_map.insert(FunctionHandleMap::value_type(id, (path_map_iter->second).function));
} else {
// no, we have to load this object
void *obj_handle = dlopen(path.c_str(), RTLD_LAZY | RTLD_LOCAL);
if (!obj_handle) {
_errorLog("[%s::%s] Could not load module [%s]. Error [%s]", CLASS_NAME, __FUNCTION__, path.c_str(), dlerror());
} else {
SpecialIncludeHandlerCreator func_handle = (SpecialIncludeHandlerCreator)(dlsym(obj_handle, FACTORY_FUNCTION_NAME));
if (!func_handle) {
_errorLog("[%s::%s] Could not find factory function [%s] in module [%s]. Error [%s]", CLASS_NAME, __FUNCTION__,
FACTORY_FUNCTION_NAME, path.c_str(), dlerror());
dlclose(obj_handle);
} else {
_id_to_function_map.insert(FunctionHandleMap::value_type(id, func_handle));
_path_to_module_map.insert(ModuleHandleMap::value_type(path, ModuleHandles(obj_handle, func_handle)));
_debugLog(_debug_tag, "[%s] Loaded handler module [%s]", __FUNCTION__, path.c_str());
}
}
}
}
}
SpecialIncludeHandler *
HandlerManager::getHandler(Variables &esi_vars, Expression &esi_expr, HttpDataFetcher &fetcher, const std::string &id) const
{
FunctionHandleMap::const_iterator iter = _id_to_function_map.find(id);
if (iter == _id_to_function_map.end()) {
_errorLog("[%s::%s] handler id [%s] does not map to any loaded object", CLASS_NAME, __FUNCTION__, id.c_str());
return nullptr;
}
return (*(iter->second))(esi_vars, esi_expr, fetcher, id);
}
HandlerManager::~HandlerManager()
{
for (ModuleHandleMap::iterator map_iter = _path_to_module_map.begin(); map_iter != _path_to_module_map.end(); ++map_iter) {
dlclose((map_iter->second).object);
}
}
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