Class PluginBase
Synopsis
#include <lib/inc/drogon/plugins/Plugin.h>
class DROGON_EXPORT PluginBase : public virtual DrObjectBase,
public trantor::NonCopyable
Description
The abstract base class for plugins.
Mentioned in
- Plugins / Getting Instance
Inheritance
Ancestors: NonCopyable, DrObjectBase
Decsendents: Plugin
Methods
| PluginBase | ||
| ~PluginBase | ||
| initAndStart | This method must be called by drogon to initialize and start the plugin | |
| initialize | This method must be called by drogon. | |
| shutdown | This method must be called by drogon to shutdown the plugin |
Source
Lines 35-100 in lib/inc/drogon/plugins/Plugin.h.
class DROGON_EXPORT PluginBase : public virtual DrObjectBase,
public trantor::NonCopyable
{
public:
/// This method must be called by drogon.
void initialize()
{
if (status_ == PluginStatus::None)
{
status_ = PluginStatus::Initializing;
for (auto dependency : dependencies_)
{
dependency->initialize();
}
initAndStart(config_);
status_ = PluginStatus::Initialized;
if (initializedCallback_)
initializedCallback_(this);
}
else if (status_ == PluginStatus::Initialized)
{
// Do nothing;
}
else
{
LOG_FATAL << "There are a circular dependency within plugins.";
abort();
}
}
/// This method must be called by drogon to initialize and start the plugin.
/// It must be implemented by the user.
virtual void initAndStart(const Json::Value &config) = 0;
/// This method must be called by drogon to shutdown the plugin.
/// It must be implemented by the user.
virtual void shutdown() = 0;
virtual ~PluginBase()
{
}
protected:
PluginBase()
{
}
private:
PluginStatus status_{PluginStatus::None};
friend class PluginsManager;
void setConfig(const Json::Value &config)
{
config_ = config;
}
void addDependency(PluginBase *dp)
{
dependencies_.push_back(dp);
}
void setInitializedCallback(const std::function<void(PluginBase *)> &cb)
{
initializedCallback_ = cb;
}
Json::Value config_;
std::vector<PluginBase *> dependencies_;
std::function<void(PluginBase *)> initializedCallback_;
};