JFrame（组件的加载与退出【TestPlugin】）

组件位置

 

组件暂时都被编译进 bin 目录，之后会进行区分！

组件配置文件

 

 该配置文件指示了哪些组件将要被加载以及加载顺序

 加载组件代码：

 1 bool JCore::loadPlugins(const QString &pluginsPath)
 2 {
 3     QFileInfoList fileList;
 4     QDir dir(pluginsPath);
 5 
 6     dir.setFilter(QDir::Files);
 7     fileList = dir.entryInfoList();
 8 
 9     foreach (QString pluginPath, m_config.getListAllPlugins())
10     {
11         if(_pluginExist(pluginPath, fileList))
12         {
13             qDebug() << "加载插件 [ " << pluginPath << " ] ... ";
14             if(!loadPlugin(pluginPath))
15             {
16                 qDebug() << "加载插件 [ " << pluginPath << " ] 失败！";
17                 break;
18             }
19             else
20             {
21                 qDebug() << "加载插件 [ " << pluginPath << " ] 成功！";
22             }
23         }
24         else
25         {
26             qDebug() << "插件 [ " << pluginPath << " ] 不存在！";
27         }
28     }
29     return true;
30 }

 1 bool JCore::loadPlugin(const QString &pluginPath)
 2 {
 3     IPluginInterface *p_plugin = nullptr;
 4     QPluginLoader* p_pluginLoader = nullptr;
 5     QObject *p_instance = nullptr;
 6 
 7     try
 8     {
 9         p_pluginLoader = new QPluginLoader(pluginPath);
10         p_instance = p_pluginLoader->instance();
11 
12     }
13     catch(...)
14     {
15         return false;
16     }
17 
18     p_plugin = qobject_cast<IPluginInterface*>(p_instance);
19     p_plugin->initialize();
20 
21     std::shared_ptr<PluginInfo> _pluginInfo(new PluginInfo);
22     _pluginInfo->m_name = p_plugin->getPluginNmae();
23     _pluginInfo->m_fullPath = pluginPath;
24     _pluginInfo->m_pInstance = std::shared_ptr<IPluginInterface>(p_plugin);
25 
26     m_listPluginInfo.append(_pluginInfo);
27 
28     return true;
29 }

插件接口文件

 1 class IPluginInterface
 2 {
 3 public:
 4     virtual ~IPluginInterface(){}
 5 
 6     // 插件初始化
 7     virtual void initialize() = 0;
 8 
 9     // 获取插件的名字
10     virtual QString getPluginNmae() = 0;
11 
12     // 插件退出时候调用的函数
13     virtual int exit() = 0;
14 };

JCore启动入口函数

 1 JCore::StartUPStatus JCore::startUP(const QString &appPath)
 2 {
 3     if(!m_config.readAllPlugins(appPath))
 4     {
 5         qDebug() << "读取插件路径失败！";
 6         return StartUPStatus::CONFIG_READ_ERROR;
 7     }
 8 
 9     if(!loadPlugins(appPath))
10     {
11         qDebug() << "实例化插件失败！";
12         return StartUPStatus::PLUGIN_LOAD_ERROR;
13     }
14 
15     return StartUPStatus::OK;
16 }

 1 MainWindow::MainWindow(QWidget *parent) :
 2     QMainWindow(parent),
 3     ui(new Ui::MainWindow)
 4 {
 5     ui->setupUi(this);
 6     m_coreInstance = JCore::getInstance();
 7     if(JCore::StartUPStatus::OK != m_coreInstance->startUP(QCoreApplication::applicationDirPath() + "/"))
 8     {
 9         qDebug() << "框架启动失败！";
10     }
11 }

TestPlugin 插件

 1 #ifndef TESTPLUGIN_H
 2 #define TESTPLUGIN_H
 3 
 4 #include "testplugin_global.h"
 5 #include "IPluginInterface.h"
 6 
 7 class TESTPLUGINSHARED_EXPORT TestPlugin : public QObject, public IPluginInterface
 8 {
 9     Q_OBJECT
10     Q_PLUGIN_METADATA(IID Plugin_interface_iid FILE "QPlugin.json")
11     Q_INTERFACES(IPluginInterface)
12 public:
13     TestPlugin(QObject *parent = nullptr);
14 
15     virtual ~TestPlugin() override;
16 
17     // 插件初始化
18     virtual void initialize() override;
19 
20     // 获取插件的名字
21     virtual QString getPluginNmae() override;
22 
23     virtual int exit() override;
24 };
25 
26 #endif // TESTPLUGIN_H

 1 #include "testplugin.h"
 2 #include <QDebug>
 3 
 4 TestPlugin::TestPlugin(QObject *parent)
 5     : QObject(parent)
 6 {
 7 }
 8 
 9 TestPlugin::~TestPlugin()
10 {
11     qDebug() << "~TestPlugin ...";
12 }
13 
14 void TestPlugin::initialize()
15 {
16     qDebug() << "TestPlugin begin initialize ...";
17 }
18 
19 QString TestPlugin::getPluginNmae()
20 {
21     return "TestPlugin";
22 }
23 
24 int TestPlugin::exit()
25 {
26     qDebug() << "TestPlugin exit ...";
27     return 0;
28 }

测试

 

标签：IPluginInterface,插件,JFrame,TestPlugin,JCore,QString,virtual,加载
来源： https://www.cnblogs.com/JackZheng/p/16147229.html