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#ifndef Pegasus_TraceHandler_h
#define Pegasus_TraceHandler_h

#include <cstdarg>
#include <cstdio>
#include <Pegasus/Common/String.h>
#include <Pegasus/Common/Linkage.h>

PEGASUS_NAMESPACE_BEGIN

/** TraceHandler is an abstract base class for all kinds of trace handlers.
 */

class PEGASUS_COMMON_LINKAGE TraceHandler
{
public:

    /** Writes message with format string to the tracing facility
        @param    message  message to be written
        @param    msgLen   lenght of message without terminating '\0'
        @param    fmt      printf style format string
        @param    argList  variable argument list
     */
    virtual void handleMessage(const char* message,
                               Uint32 msgLen,
                               const char* fmt,
                               va_list argList) = 0;

    /** Writes simple message to the tracing facility.
        @param    message  message to be written
        @param    msgLen   lenght of message without terminating '\0'
     */
    virtual void handleMessage(const char* message,
                               Uint32 msgLen) = 0;


    /** Informs the message handler that the configuraion 
        of the trace has been updated.
     */
    virtual void configurationUpdated() {return;};

    /** Flushes the trace
     */
    virtual void flushTrace() {return;};
    
    TraceHandler() {};

    virtual ~TraceHandler() {};

    
};

PEGASUS_NAMESPACE_END

#endif /* Pegasus_TraceHandler_h */