log4cpp 1.1

Appender.hh

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00001 /*
00002  * Appender.hh
00003  *
00004  * Copyright 2000, LifeLine Networks BV (www.lifeline.nl). All rights reserved.
00005  * Copyright 2000, Bastiaan Bakker. All rights reserved.
00006  *
00007  * See the COPYING file for the terms of usage and distribution.
00008  */
00009 
00010 #ifndef _LOG4CPP_APPENDER_HH
00011 #define _LOG4CPP_APPENDER_HH
00012 
00013 #include <log4cpp/Portability.hh>
00014 #include <string>
00015 #include <map>
00016 #include <set>
00017 #include <vector>
00018 #include <stdarg.h>
00019 #include <sys/types.h>
00020 #include <sys/stat.h>
00021 #include <fcntl.h>
00022 #include <log4cpp/Priority.hh>
00023 #include <log4cpp/Layout.hh>
00024 #include <log4cpp/LoggingEvent.hh>
00025 #include <log4cpp/threading/Threading.hh>
00026 
00027 namespace log4cpp {
00028     class LOG4CPP_EXPORT Filter;
00029     
00034     class LOG4CPP_EXPORT Appender {
00035                 friend class Category;
00036         public:
00037         
00044         static Appender* getAppender(const std::string& name);
00045         
00050         static bool reopenAll();
00051         
00056         static void closeAll();
00057         
00058         protected:
00064         Appender(const std::string& name);
00065         
00066         public:
00070         virtual ~Appender();
00071         
00076         virtual void doAppend(const LoggingEvent& event) = 0;
00077         
00083         virtual bool reopen() = 0;
00084         
00089         virtual void close() = 0;
00090         
00096         virtual bool requiresLayout() const = 0;
00097         
00102         virtual void setLayout(Layout* layout) = 0;
00103         
00108         inline const std::string& getName() const { return _name; };
00109         
00116         virtual void setThreshold(Priority::Value priority) = 0;
00117         
00122         virtual Priority::Value getThreshold() = 0;
00123         
00127         virtual void setFilter(Filter* filter) = 0;
00128         
00133         virtual Filter* getFilter() = 0;
00134         
00135                 private:
00136         typedef std::map<std::string, Appender*> AppenderMap;
00137 
00138         static AppenderMap& _getAllAppenders();
00139         static void _deleteAllAppenders();
00140                 static void _deleteAllAppendersWOLock(std::vector<Appender*> &appenders);
00141         static void _addAppender(Appender* appender);
00142         static void _removeAppender(Appender* appender);
00143 
00144         const std::string _name;
00145 
00146                 public:
00147                 class AppenderMapStorage {
00148                 public:
00149                         Appender::AppenderMap* _allAppenders;   // single shared instance, nifty-counter defensed
00150                 threading::Mutex _appenderMapMutex;     // mutex protecting map from multiple thread access 
00151 
00152                         AppenderMapStorage();
00153                         ~AppenderMapStorage();
00154                 };
00155                 class AppenderMapStorageInitializer {
00156                 public:
00157                         AppenderMapStorageInitializer();
00158                         ~AppenderMapStorageInitializer();
00159                 };
00160                 private:
00161         static AppenderMapStorage &_appenderMapStorageInstance;
00162     };
00163 
00164         static Appender::AppenderMapStorageInitializer appenderMapStorageInitializer; // static initializer for every translation unit
00165     typedef std::set<Appender *> AppenderSet;
00166 
00167 }
00168 
00169 #endif // _LOG4CPP_APPENDER_HH
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