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Message.h
//
// Message.h
//
// $Id: //poco/1.3/Foundation/include/Poco/Message.h#3 $
//
// Library: Foundation
// Package: Logging
// Module:  Message
//
// Definition of the Message class.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//


#ifndef Foundation_Message_INCLUDED
#define Foundation_Message_INCLUDED


#include "Poco/Foundation.h"
#include "Poco/Timestamp.h"
#include <map>


namespace Poco {


00051 class Foundation_API Message
      /// This class represents a log message that is sent through a
      /// chain of log channels.
      ///
      /// A Message contains a priority denoting the severity of the
      /// message, a source describing its origin, a text describing
      /// its meaning, the time of its creation, and an identifier of
      /// the process and thread that created the message.
      ///
      /// A Message can also contain any number of named parameters
      /// that contain additional information about the event that
      /// caused the message.
{
public:
00065       enum Priority
      {
            PRIO_FATAL = 1,   /// A fatal error. The application will most likely terminate. This is the highest priority.
00068             PRIO_CRITICAL,    /// A critical error. The application might not be able to continue running successfully.
00069             PRIO_ERROR,       /// An error. An operation did not complete successfully, but the application as a whole is not affected.
00070             PRIO_WARNING,     /// A warning. An operation completed with an unexpected result.
00071             PRIO_NOTICE,      /// A notice, which is an information with just a higher priority.
00072             PRIO_INFORMATION, /// An informational message, usually denoting the successful completion of an operation.
00073             PRIO_DEBUG,       /// A debugging message.
00074             PRIO_TRACE        /// A tracing message. This is the lowest priority.
      };
      
      Message();
            /// Creates an empty Message.
            /// The thread and process ids are set.
            
      Message(const std::string& source, const std::string& text, Priority prio);
            /// Creates a Message with the given source, text and priority.
            /// The thread and process ids are set.
            
      Message(const Message& msg);
            /// Creates a Message by copying another one.
            
      Message(const Message& msg, const std::string& text);
            /// Creates a Message by copying all but the text from another message.
            
      ~Message();
            /// Destroys the Message.
      
      Message& operator = (const Message& msg);
            /// Assignment operator.
            
      void swap(Message& msg);
            /// Swaps the message with another one.   
            
      void setSource(const std::string& src);
            /// Sets the source of the message.
            
      const std::string& getSource() const;
            /// Returns the source of the message.
            
      void setText(const std::string& text);
            /// Sets the text of the message.
            
      const std::string& getText() const;
            /// Returns the text of the message.
            
      void setPriority(Priority prio);
            /// Sets the priority of the message.
            
      Priority getPriority() const;
            /// Returns the priority of the message.
      
      void setTime(const Timestamp& time);
            /// Sets the time of the message.
            
      const Timestamp& getTime() const;
            /// Returns the time of the message.
            
      void setThread(const std::string& thread);
            /// Sets the thread identifier for the message.
            
      const std::string& getThread() const;
            /// Returns the thread identifier for the message.

      void setTid(long pid);
            /// Sets the numeric thread identifier for the message.
            
      long getTid() const;
            /// Returns the numeric thread identifier for the message.
      
      void setPid(long pid);
            /// Sets the process identifier for the message.
            
      long getPid() const;
            /// Returns the process identifier for the message.
            
      const std::string& operator [] (const std::string& param) const;
            /// Returns a const reference to the value of the parameter
            /// with the given name. Throws a NotFoundException if the
            /// parameter does not exist.
            
      std::string& operator [] (const std::string& param);
            /// Returns a reference to the value of the parameter with the
            /// given name. This can be used to set the parameter's value.
            /// If the parameter does not exist, it is created with an
            /// empty string value.

protected:
      void init();
      typedef std::map<std::string, std::string> StringMap;

private:    
      std::string _source;
      std::string _text;
      Priority    _prio;
      Timestamp   _time;
      int         _tid;
      std::string _thread;
      long        _pid;
      StringMap*  _pMap;
};


//
// inlines
//
00172 inline const std::string& Message::getSource() const
{
      return _source;
}


00178 inline const std::string& Message::getText() const
{
      return _text;
}


00184 inline Message::Priority Message::getPriority() const
{
      return _prio;
}


00190 inline const Timestamp& Message::getTime() const
{
      return _time;
}


00196 inline const std::string& Message::getThread() const
{
      return _thread;
}


00202 inline long Message::getTid() const
{
      return _tid;
}


00208 inline long Message::getPid() const
{
      return _pid;
}


inline void swap(Message& m1, Message& m2)
{
      m1.swap(m2);
}


} // namespace Poco


#endif // Foundation_Message_INCLUDED

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