TMessageHandler

class TMessageHandler : public TNamed

    public:

                      TMessageHandler(const TClass* cl, Bool_t derived = kTRUE)
                      TMessageHandler(const char* cl, Bool_t derived = kTRUE)
                      TMessageHandler(const TMessageHandler&)
              virtual ~TMessageHandler()
         virtual void Add()
       static TClass* Class()
        virtual Int_t GetMessageCount(Int_t messId) const
                Int_t GetSize() const
        virtual Int_t GetTotalMessageCount() const
               Bool_t HandleDerived() const
         virtual void HandleMessage(Int_t id, const TObject* obj)
      virtual TClass* IsA() const
       virtual Bool_t Notify()
         virtual void Print(Option_t* option = "") const
         virtual void Remove()
         virtual void ShowMembers(TMemberInspector& insp, char* parent)
         virtual void Streamer(TBuffer& b)
                 void StreamerNVirtual(TBuffer& b)

Data Members

    protected:

       const TClass* fClass    class for which message has to be handled
      const TObject* fMessObj  object generating message
               Int_t fMessId   message id (often matching specific enum in fClass)
               Int_t fSize     number of different messages handled
              Int_t* fCnts     count per message
              Int_t* fMessIds  message ids
              Bool_t fDerived  if true handle messages also for derived classes

Class Description

                                                                      
 TMessageHandler                                                      
                                                                      
 Handle messages that might be generated by the system.               
 By default a handler only keeps track of the different messages      
 generated for a specific class. By deriving from this class and      
 overriding Notify() one can implement custom message handling.       
 In Notify() one has access to the message id and the object          
 generating the message. One can install more than one message        
 handler per class. A message handler can be removed or again         
 added when needed.                                                   
 All Root "Warnings"  are logged as message 1001                      
 All Root "Errors"    are logged as message 1002                      
 All Root "SysErrors" are logged as message 1003                      
 All Root "Fatals"    are logged as message 1004                      
                                                                      

 Create a new message handler for class cl and add it to the list
 of message handlers.

 Create a new message handler for class named cl and add it to the list
 of message handlers.

 Clean up the messagehandler.

 Add this message handler to the list of messages handlers.

 Return counter for message with ID=messid.

 Return total number of messages.

 Store message origin, keep statistics and call Notify().

 This method must be overridden to handle object notifcation.

 Print statistics for this message handler.

 Remove this message handler from the list of messages handlers.

Inline Functions

                  Int_t GetSize() const
                 Bool_t HandleDerived() const
                TClass* Class()
                TClass* IsA() const
                   void ShowMembers(TMemberInspector& insp, char* parent)
                   void Streamer(TBuffer& b)
                   void StreamerNVirtual(TBuffer& b)
        TMessageHandler TMessageHandler(const TMessageHandler&)