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Diff for /parser3/src/main/pa_sql_driver_manager.C between versions 1.41 and 1.48

version 1.41, 2001/10/19 12:43:30 version 1.48, 2001/10/31 14:58:10
Line 13 Line 13
 #include "pa_exception.h"  #include "pa_exception.h"
 #include "pa_common.h"  #include "pa_common.h"
 #include "pa_threads.h"  #include "pa_threads.h"
   #include "pa_stack.h"
   
 // globals  // globals
   
Line 31  public: Line 32  public:
                 furl(aurl) {                  furl(aurl) {
         }          }
   
         /// allocates some bytes on pool          virtual void *malloc(size_t size) { return Pooled::malloc(size, 8); }
         void *malloc(size_t size) { return Pooled::malloc(size); }          virtual void *calloc(size_t size) { return Pooled::calloc(size); }
         /// allocates some bytes clearing them with zeros  
         void *calloc(size_t size) { return Pooled::calloc(size); }          /**
                   the idea is to #1 jump to C++ some function to main body, where
         /// throw exception                  every function stack frame has exception unwind information
         void _throw(const char *comment) {                   and from there... #2 propagate_exception()
                 throw Exception(0, 0,           */
                         &furl,           virtual void _throw(const char *comment) { 
                   String& protocol=*NEW String(pool());
                   /// hiding passwords and addresses from accidental show [imagine user forgot @exception]
                   protocol << furl.mid(0, furl.pos(":")) << "://****";
                   e=Exception(0, 0, 
                           &protocol,
                         comment);                           comment); 
   
                   longjmp(mark, 1);
           }
           virtual void propagate_exception() {
                   throw e;
         }          }
   
 private:  private:
         const String& furl;          const String& furl;
           Exception e;
 };  };
   
   // helpers
   
   static void expire_connection(Array::Item *value, void *info) {
           SQL_Connection& connection=*static_cast<SQL_Connection *>(value);
           time_t older_dies=reinterpret_cast<time_t>(info);
   
           if(connection.connected() && connection.expired(older_dies))
                   connection.disconnect();
   }
   static void expire_connections(const Hash::Key& key, Hash::Val *value, void *info) {
           Stack& stack=*static_cast<Stack *>(value);
           for(int i=0; i<=stack.top_index(); i++)
                   expire_connection(stack.get(i), info);
   }
   
 // SQL_Driver_manager  // SQL_Driver_manager
   
   SQL_Driver_manager::SQL_Driver_manager(Pool& pool) : Pooled(pool),
                   driver_cache(pool),
                   connection_cache(pool),
                   prev_expiration_pass_time(0) {
           
   }
   
   SQL_Driver_manager::~SQL_Driver_manager() {
           connection_cache.for_each(expire_connections, 
                   reinterpret_cast<void *>((time_t)0/*=in past=expire all*/));
   }
   
 /// @param request_url protocol://[driver-dependent]  /// @param request_url protocol://[driver-dependent]
 SQL_Connection& SQL_Driver_manager::get_connection(const String& request_url,  SQL_Connection& SQL_Driver_manager::get_connection(const String& request_url,
                                                                                                    const String& request_origin,                                                                                                     const String& request_origin,
Line 61  SQL_Connection& SQL_Driver_manager::get_ Line 100  SQL_Connection& SQL_Driver_manager::get_
                         &request_url,                          &request_url,
                         "$"MAIN_SQL_NAME":"MAIN_SQL_DRIVERS_NAME" table must be defined");                          "$"MAIN_SQL_NAME":"MAIN_SQL_DRIVERS_NAME" table must be defined");
   
           // construct services[request]  (deassociates at close)
           SQL_Driver_services *services=new(pool) SQL_Driver_services_impl(pool, request_url); 
   
         // first trying to get cached connection          // first trying to get cached connection
         SQL_Connection *result=get_connection_from_cache(request_url);          SQL_Connection *result=get_connection_from_cache(request_url);
         if(result && !result->ping()) { // we have some cached connection, is it pingable?          if(result) {
                 result->disconnect(); // kill unpingabe=dead connection                  result->set_services(services);
                 result=0;                  if(!result->ping()) { // we have some cached connection, is it pingable?
                           result->disconnect(); // kill unpingabe=dead connection
                           result=0;
                   }
         }          }
   
         char *request_url_cstr;          char *request_url_cstr;
Line 79  SQL_Connection& SQL_Driver_manager::get_ Line 124  SQL_Connection& SQL_Driver_manager::get_
                                 "connection string must start with protocol://"); // NOTE: not THROW, but PTHROW                                  "connection string must start with protocol://"); // NOTE: not THROW, but PTHROW
   
                 // make global_url C-string on global pool                  // make global_url C-string on global pool
                 request_url_cstr=request_url.cstr(String::UL_AS_IS);                  request_url_cstr=request_url.cstr();
                 char *global_url_cstr=(char *)malloc(strlen(request_url_cstr)+1);                  char *global_url_cstr=(char *)malloc(strlen(request_url_cstr)+1);
                 strcpy(global_url_cstr, request_url_cstr);                  strcpy(global_url_cstr, request_url_cstr);
                 // make global_url string on global pool                  // make global_url string on global pool
Line 166  SQL_Connection& SQL_Driver_manager::get_ Line 211  SQL_Connection& SQL_Driver_manager::get_
                 // associate with services[request]                  // associate with services[request]
                 // NOTE: never freed up!                  // NOTE: never freed up!
                 result=new(this->pool()) SQL_Connection(this->pool(), global_url, *driver);                  result=new(this->pool()) SQL_Connection(this->pool(), global_url, *driver);
                   // associate with services[request]  (deassociates at close)
                   result->set_services(services); 
         }          }
   
         // associate with services[request]  (deassociates at close)  
         result->set_services(new(pool) SQL_Driver_services_impl(pool, request_url));   
         // if not connected yet, do that now, when result has services          // if not connected yet, do that now, when result has services
         if(!result->connected())          if(!result->connected())
                 result->connect(request_url_cstr);                  result->connect(request_url_cstr);
Line 229  void SQL_Driver_manager::put_connection_ Line 274  void SQL_Driver_manager::put_connection_
         connections->push(&connection);          connections->push(&connection);
 }  }
   
 static void expire_connection(Array::Item *value, void *info) {  
         SQL_Connection& connection=*static_cast<SQL_Connection *>(value);  
         time_t older_dies=reinterpret_cast<time_t>(info);  
   
         if(connection.connected() && connection.expired(older_dies))  
                 connection.disconnect();  
 }  
 static void expire_connections(const Hash::Key& key, Hash::Val *value, void *info) {  
         Stack& stack=*static_cast<Stack *>(value);  
         for(int i=0; i<=stack.top_index(); i++)  
                 expire_connection(stack.get(i), info);  
 }  
 void SQL_Driver_manager::maybe_expire_connection_cache() {  void SQL_Driver_manager::maybe_expire_connection_cache() {
         time_t now=time(0);          time_t now=time(0);
   
Removed from v.1.41  
changed lines
  Added in v.1.48

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