XtrContext.h

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/*
* Copyright (c) 2005,2006,2007 The Regents of the University of California.
* All rights reserved.
* 
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*     * Redistributions of source code must retain the above copyright
*       notice, this list of conditions and the following disclaimer.
*     * Redistributions in binary form must reproduce the above copyright
*       notice, this list of conditions and the following disclaimer in the
*       documentation and/or other materials provided with the distribution.
*     * Neither the name of the University of California, nor the
*       names of its contributors may be used to endorse or promote products
*       derived from this software without specific prior written permission.
* 
* THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY OF CALIFORNIA ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include "XtrMetadata.h"
#include "XtrEvent.h"
#include <pthread.h>
#include <unistd.h>
#include <memory>

#ifndef _XTR_CONTEXT_H
#define _XTR_CONTEXT_H

#define MAXHOSTNAME 256

using namespace std;

namespace xtr {
    
class Context {
public:

    static const Metadata& getContext ();

    static void setContext (Metadata const& xtr);

    static void unsetContext ();
    

    static xtr_result logEvent(const char* agent, const char* label,
                          u_int8_t severity = OptionSeverity::_DEFAULT);

    static xtr_result logEvent(Event* e,
                          u_int8_t severity = OptionSeverity::_DEFAULT);

    static auto_ptr<Event> 
    createEvent( const char* agent, const char* label,
                 u_int8_t severity = OptionSeverity::_DEFAULT); 

    static auto_ptr<Event>
    prepareEvent( const char* agent, const char* label, 
                  u_int8_t severity = OptionSeverity::_DEFAULT);
    
    static void setHost(const char* name);
    
    static void forkContext ();
private:

    static void ensureKey();
    static bool is_host_set;
    static char host_name[MAXHOSTNAME+1];
    static void _set_host();
public: // so it can be inited
    static pthread_key_t context_key;
};

}; //namespace xtr


#endif //_XTR_CONTEXT_H