blob: 2cbf6f5f76fc3e4345439850b4b87f3e54ca5f51 [file] [log] [blame]
/**
* @file propertywatch.hpp
* @brief PropertyWatch class declarations.
*
* In general class users should include propertywatchimpl.hpp instead to avoid
* link failures.
*/
#pragma once
#include "data_types.hpp"
#include "watch.hpp"
namespace phosphor
{
namespace dbus
{
namespace monitoring
{
class Callback;
/** @class PropertyWatch
* @brief Type agnostic, factored out logic for property watches.
*
* A property watch maintains the state of one or more DBus properties
* as specified by the supplied index.
*/
template <typename DBusInterfaceType> class PropertyWatch : public Watch
{
public:
PropertyWatch() = delete;
PropertyWatch(const PropertyWatch&) = delete;
PropertyWatch(PropertyWatch&&) = default;
PropertyWatch& operator=(const PropertyWatch&) = delete;
PropertyWatch& operator=(PropertyWatch&&) = default;
virtual ~PropertyWatch() = default;
PropertyWatch(const PropertyIndex& watchIndex,
Callback* callback = nullptr) :
Watch(),
index(watchIndex), cb(callback), alreadyRan(false)
{
}
/** @brief Start the watch.
*
* Watch start interface implementation for PropertyWatch.
*/
void start() override;
/** @brief Run the watch callback method.
*
* Watch callback interface implementation for PropertyWatch.
*/
void callback(Context ctx) override;
/** @brief Update properties.
*
* Subclasses to query the properties specified by the index
* and update the cache.
*
* @param[in] busName - The busname hosting the interface to query.
* @param[in] path - The path of the interface to query.
* @param[in] interface - The interface to query.
*/
virtual void updateProperties(const std::string& busName,
const std::string& path,
const std::string& interface) = 0;
/** @brief Dbus signal callback for PropertiesChanged.
*
* Subclasses to update the cache.
*
* @param[in] message - The org.freedesktop.DBus.PropertiesChanged
* message.
* @param[in] path - The path associated with the message.
* @param[in] interface - The interface associated with the message.
*/
virtual void propertiesChanged(sdbusplus::message::message&,
const std::string& path,
const std::string& interface) = 0;
/** @brief Dbus signal callback for InterfacesAdded.
*
* Subclasses to update the cache.
*
* @param[in] msg - The org.freedesktop.DBus.PropertiesChanged
* message.
*/
virtual void interfacesAdded(sdbusplus::message::message& msg) = 0;
protected:
/** @brief Property names and their associated storage. */
const PropertyIndex& index;
/** @brief Optional callback method. */
Callback* const cb;
/** @brief The start method should only be invoked once. */
bool alreadyRan;
};
/** @class PropertyWatchOfType
* @brief Type specific logic for PropertyWatch.
*
* @tparam DBusInterfaceType - DBus access delegate.
* @tparam T - The type of the properties being watched.
*/
template <typename T, typename DBusInterfaceType>
class PropertyWatchOfType : public PropertyWatch<DBusInterfaceType>
{
public:
PropertyWatchOfType() = default;
PropertyWatchOfType(const PropertyWatchOfType&) = delete;
PropertyWatchOfType(PropertyWatchOfType&&) = default;
PropertyWatchOfType& operator=(const PropertyWatchOfType&) = delete;
PropertyWatchOfType& operator=(PropertyWatchOfType&&) = default;
~PropertyWatchOfType() = default;
PropertyWatchOfType(const PropertyIndex& watchIndex, Callback& callback) :
PropertyWatch<DBusInterfaceType>(watchIndex, &callback)
{
}
PropertyWatchOfType(const PropertyIndex& watchIndex) :
PropertyWatch<DBusInterfaceType>(watchIndex, nullptr)
{
}
/** @brief PropertyMatch implementation for PropertyWatchOfType.
*
* @param[in] busName - The busname hosting the interface to query.
* @param[in] path - The path of the interface to query.
* @param[in] interface - The interface to query.
*/
void updateProperties(const std::string& busName, const std::string& path,
const std::string& interface) override;
/** @brief PropertyMatch implementation for PropertyWatchOfType.
*
* @param[in] msg - The org.freedesktop.DBus.PropertiesChanged
* message.
* @param[in] path - The path associated with the message.
* @param[in] interface - The interface associated with the message.
*/
void propertiesChanged(sdbusplus::message::message& msg,
const std::string& path,
const std::string& interface) override;
/** @brief DBus agnostic implementation of interfacesAdded.
*
* @param[in] path - The path of the properties that changed.
* @param[in] interface - The interface of the properties that
* changed.
* @param[in] properites - The properties that changed.
*/
void propertiesChanged(const std::string& path,
const std::string& interface,
const PropertiesChanged<T>& properties);
/** @brief PropertyMatch implementation for PropertyWatchOfType.
*
* @param[in] msg - The org.freedesktop.DBus.PropertiesChanged
* message.
*/
void interfacesAdded(sdbusplus::message::message& msg) override;
/** @brief DBus agnostic implementation of interfacesAdded.
*
* @param[in] path - The path of the added interfaces.
* @param[in] interfaces - The added interfaces.
*/
void interfacesAdded(const std::string& path,
const InterfacesAdded<T>& interfaces);
};
} // namespace monitoring
} // namespace dbus
} // namespace phosphor