fsfw/health/HealthHelper.h
2016-06-15 23:48:49 +02:00

121 lines
3.2 KiB
C++

#ifndef HEALTHHELPER_H_
#define HEALTHHELPER_H_
#include <framework/events/EventManagerIF.h>
#include <framework/events/EventReportingProxyIF.h>
#include <framework/health/HasHealthIF.h>
#include <framework/health/HealthMessage.h>
#include <framework/health/HealthTableIF.h>
#include <framework/objectmanager/ObjectManagerIF.h>
#include <framework/returnvalues/HasReturnvaluesIF.h>
/**
* Helper class for Objects that implement HasHealthIF
*
* It takes care of registering with the Health Table as well as handling health commands
* (including replying to the sender) and updating the Health Table.
*
* If a parent is set in the ctor, the parent will be informed with a @c HEALTH_INFO message
* about changes in the health state. Note that a @c HEALTH_INFO is only generated if the Health
* changes, not for all @c HEALTH_SET commands received.
*
* It does NOT handle @c HEALTH_INFO messages
*/
class HealthHelper {
public:
/**
* ctor
*
* @param objectId the object Id to use when communication with the HealthTable
* @param useAsFrom id to use as from id when sending replies, can be set to 0
*/
HealthHelper(HasHealthIF* owner, object_id_t objectId);
virtual ~HealthHelper();
/**
* Pointer to the Health Table
*
* only valid after initialize() has been called
*/
HealthTableIF *healthTable;
/**
* Proxy to forward events.
*/
EventReportingProxyIF* eventSender;
/**
* Try to handle the message.
*
* This function handles @c HEALTH_SET and @c HEALTH_READ commands.
* it updates the Health Table and generates a reply to the sender.
*
* @param message
* @return
* -@c RETURN_OK if the message was handled
* -@c RETURN_FAILED if the message could not be handled (ie it was not a @c HEALTH_SET or @c HEALTH_READ message)
*/
ReturnValue_t handleHealthCommand(CommandMessage *message);
/**
* set the Health State
*
* The parent will be informed, if the Health changes
*
* @param health
*/
void setHealth(HasHealthIF::HealthState health);
/**
* get Health State
*
* @return Health State of the object
*/
HasHealthIF::HealthState getHealth();
/**
* @param parentQueue the Queue id of the parent object. Set to 0 if no parent present
*/
void setParentQeueue(MessageQueueId_t parentQueue);
/**
*
* @param parentQueue the Queue id of the parent object. Set to 0 if no parent present
* @return
* -@c RETURN_OK if the Health Table was found and the object could be registered
* -@c RETURN_FAILED else
*/
ReturnValue_t initialize(MessageQueueId_t parentQueue );
ReturnValue_t initialize();
private:
/**
* the object id to use when communicating with the Health Table
*/
object_id_t objectId;
/**
* The Queue of the parent
*/
MessageQueueId_t parentQueue;
/**
* The one using the healthHelper.
*/
HasHealthIF* owner;
/**
* if the #parentQueue is not NULL, a @c HEALTH_INFO message will be sent to this queue
* @param health the health is passed as parameter so that the number of calls to the health table can be minimized
* @param oldHealth information of the previous health state.
*/
void informParent(HasHealthIF::HealthState health, HasHealthIF::HealthState oldHealth);
void handleSetHealthCommand(CommandMessage *message);
};
#endif /* HEALTHHELPER_H_ */