#include "Server.h"
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#include <iostream>
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#include <csignal>
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#include <chrono>
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// Initialize the static instance pointer
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Server *Server::instance = nullptr;
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Server::Server() : reloadConfigFlag(false)
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{
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instance = this; // Set the instance pointer
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ipc = std::make_unique<IPC>();
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signal(SIGUSR1, Server::handleSignal);
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if (!config.loadFromFile("/etc/fserver/config.json"))
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{
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LOG(ERROR) << "Failed to load /etc/fserver/config.json";
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}
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loadPlugins();
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for (int i = 0; i < 4; ++i)
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{
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threadPool.emplace_back(&Server::handleIPC, this);
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}
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}
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Server::~Server()
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{
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// Join all threads
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for (auto &thread : threadPool)
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{
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if (thread.joinable())
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{
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thread.join();
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}
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}
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// Close all plugin handles
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for (auto &handle : pluginHandles)
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{
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dlclose(handle);
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}
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}
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Server &Server::getInstance()
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{
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return *instance;
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}
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void Server::run()
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{
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mainLoop();
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}
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void Server::reloadConfig()
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{
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if (config.loadFromFile("/etc/fserver/config.json"))
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{
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LOG(INFO) << "Configuration reloaded /etc/fserver/config.json";
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// Stop and clear existing plugins
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for (auto &plugin : plugins)
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{
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plugin->updateConfig({}); // Optionally reset plugin config
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}
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plugins.clear();
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// Close and clear plugin handles
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for (auto &handle : pluginHandles)
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{
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dlclose(handle);
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}
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pluginHandles.clear();
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loadPlugins();
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}
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else
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{
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LOG(ERROR) << "Failed to reload configuration";
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}
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}
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void Server::loadPlugins()
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{
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auto configData = config.getConfig();
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auto pluginsArray = configData["plugins"];
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for (const auto &pluginName : pluginsArray)
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{
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std::string pluginPath = "./plugins/" + pluginName.get<std::string>();
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void *handle = dlopen(pluginPath.c_str(), RTLD_LAZY);
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if (!handle)
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{
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LOG(WARNING) << "Can not open lib: " << dlerror();
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continue;
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}
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pluginHandles.push_back(handle);
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typedef IPlugin *(*create_t)(IPC *);
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create_t create_plugin = (create_t)dlsym(handle, "create");
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const char *dlsym_error = dlerror();
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if (dlsym_error)
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{
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LOG(ERROR) << "Cannot load symbol create: " << dlsym_error;
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dlclose(handle);
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continue;
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}
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std::shared_ptr<IPlugin> plugin(create_plugin(ipc.get()));
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plugins.push_back(plugin);
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ipc->registerHandler(plugin);
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plugin->updateConfig(config.getConfig()); // Forward the config to the plugin
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LOG(INFO) << "Plugin loaded: " << plugin->getPluginName();
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}
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}
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void Server::mainLoop()
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{
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while (true)
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{
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if (reloadConfigFlag.load())
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{
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reloadConfig();
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reloadConfigFlag.store(false);
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}
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std::this_thread::sleep_for(std::chrono::seconds(1));
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}
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}
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void Server::handleIPC()
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{
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while (true)
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{
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auto message = ipc->receiveMessage();
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if (message.has_value())
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{
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for (auto &plugin : plugins)
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{
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plugin->handleMessage(message.value());
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}
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}
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}
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}
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void Server::handleSignal(int signal)
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{
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if (signal == SIGUSR1)
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{
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LOG(INFO) << "Reloading config file by SIGUSR1";
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Server::getInstance().reloadConfigFlag.store(true);
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}
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}
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