--- parser3/src/main/pa_sql_driver_manager.C 2003/01/27 17:17:06 1.69.2.3 +++ parser3/src/main/pa_sql_driver_manager.C 2003/04/11 15:00:05 1.70 @@ -5,7 +5,7 @@ Author: Alexandr Petrosian (http://paf.design.ru) */ -static const char* IDENT_SQL_DRIVER_MANAGER_C="$Date: 2003/01/27 17:17:06 $"; +static const char* IDENT_SQL_DRIVER_MANAGER_C="$Date: 2003/04/11 15:00:05 $"; #include "pa_sql_driver_manager.h" #include "ltdl.h" @@ -13,12 +13,13 @@ static const char* IDENT_SQL_DRIVER_MANA #include "pa_exception.h" #include "pa_common.h" #include "pa_threads.h" +#include "pa_stack.h" #include "pa_vhash.h" #include "pa_vtable.h" // globals -SQL_Driver_manager SQL_driver_manager; +SQL_Driver_manager *SQL_driver_manager; // consts @@ -27,55 +28,112 @@ const int CHECK_EXPIRED_CONNECTIONS_SECO // helpers -ConstStringPtr SQL_Driver_services_impl::url_without_login() const { - StringPtr result(new String); - *result << url->mid(0, furl->pos(":")) << "://****"; +const String& url_without_login(Pool& pool, const String& url) { + String& result=*new(pool) String(pool); + result << url.mid(0, url.pos(":")) << "://****"; - int at_pos=url->pos("@"); + int at_pos=url.pos("@"); if(at_pos>0) - *result << url->mid(at_pos, furl->size()); + result << url.mid(at_pos, url.size()); return result; } +/// SQL_Driver_services Pooled implementation +class SQL_Driver_services_impl : public SQL_Driver_services, public Pooled { +public: + SQL_Driver_services_impl(Pool& apool, const String& aurl) : Pooled(apool), + furl(aurl) { + } + + virtual void *malloc(size_t size) { return Pooled::malloc(size, 8); } + virtual void *calloc(size_t size) { return Pooled::calloc(size); } + + /** + normally we can't 'throw' from dynamic library, so + the idea is to #1 jump to C++ some function to main body, where + every function stack frame has exception unwind information + and from there... #2 propagate_exception() + + but when parser configured --with-sjlj-exceptions + one can simply 'throw' from dynamic library. + [sad story: one can not longjump/throw due to some bug in gcc as of 3.2.1 version] + */ + virtual void _throw(const SQL_Error& aexception) { + // converting SQL_exception to parser Exception + // hiding passwords and addresses from accidental show [imagine user forgot @exception] +#ifdef PA_WITH_SJLJ_EXCEPTIONS + throw +#else + fexception= +#endif + Exception(aexception.type(), + aexception.problem_source()?static_cast(aexception.problem_source()) + :&url_without_login(pool(), furl), + aexception.comment()); + +#ifndef PA_WITH_SJLJ_EXCEPTIONS + longjmp(mark, 1); +#endif + } + virtual void propagate_exception() { +#ifndef PA_WITH_SJLJ_EXCEPTIONS + throw fexception; +#endif + } + +private: + const String& furl; + Exception fexception; +}; + // helpers -static void expire_connection(SQL_Connection& connection, time_t older_dies) { +static void expire_connection(Array::Item *value, void *info) { + SQL_Connection& connection=*static_cast(value); + time_t older_dies=reinterpret_cast(info); + if(connection.connected() && connection.expired(older_dies)) connection.disconnect(); } -static void expire_connections( - SQL_Driver_manager::connection_cache_type::key_type /*key*/, - SQL_Driver_manager::connection_cache_type::value_type stack, - time_t older_dies) { - for(int i=0; i<=stack->top_index(); i++) - expire_connection(*stack->get(i), older_dies); +static void expire_connections(const Hash::Key& key, Hash::Val *value, void *info) { + Stack& stack=*static_cast(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(): - prev_expiration_pass_time(0) { +SQL_Driver_manager::SQL_Driver_manager(Pool& apool) : Cache_manager(apool), + driver_cache(apool), + connection_cache(apool), + prev_expiration_pass_time(0) { } SQL_Driver_manager::~SQL_Driver_manager() { - connection_cache.for_each(expire_connections, time(0)+(time_t)1/*=in future=expire all*/); + connection_cache.for_each(expire_connections, + reinterpret_cast(time(0)+1/*=in future=expire all*/)); } /// @param request_url protocol://[driver-dependent] -SQL_ConnectionPtr SQL_Driver_manager::get_connection(Pool& pool, ConstStringPtr aurl, - ConstStringPtr aorigin, +SQL_Connection_ptr SQL_Driver_manager::get_connection(const String& request_url, + const String& request_origin, Table *protocol2driver_and_client) { + Pool& pool=request_origin.pool(); // request pool + // we have table for locating protocol's library if(!protocol2driver_and_client) throw Exception("parser.runtime", - aurl, + &request_url, "$"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 SQL_Connection *connection=get_connection_from_cache(request_url); if(connection) { - connection->set_pool(pool); + connection->set_services(services); if(!connection->ping()) { // we have some cached connection, is it pingable? connection->disconnect(); // kill unpingabe=dead connection connection=0; @@ -116,7 +174,8 @@ SQL_ConnectionPtr SQL_Driver_manager::ge // no cached const String *library=0; const String *dlopen_file_spec=0; - if(protocol2driver_and_client->locate(0, global_protocol)) { + Table::Action_options options; + if(protocol2driver_and_client->locate(0, global_protocol, options)) { if(!(library=protocol2driver_and_client->item(1)) || library->size()==0) throw Exception("parser.runtime", protocol2driver_and_client->origin_string(), @@ -180,33 +239,33 @@ SQL_ConnectionPtr SQL_Driver_manager::ge // NOTE: never freed up! connection=new(this->pool()) SQL_Connection(this->pool(), global_url, *driver); // associate with services[request] (deassociates at close) - connection->set_pool(pool); + connection->set_services(services); } // if not connected yet, do that now, when connection has services if(!connection->connected()) connection->connect(request_url_cstr); // return autoclosing object for it - return SQL_ConnectionPtr(connection); + return SQL_Connection_ptr(connection); } -void SQL_Driver_manager::close_connection(ConstStringPtr url, +void SQL_Driver_manager::close_connection(const String& url, SQL_Connection& connection) { // deassociate from services[request] - connection.set_pool(0); + connection.set_services(0); put_connection_to_cache(url, connection); } // driver cache -SQL_Driver *SQL_Driver_manager::get_driver_from_cache(ConstStringPtr protocol) { +SQL_Driver *SQL_Driver_manager::get_driver_from_cache(const String& protocol) { SYNCHRONIZED; return static_cast(driver_cache.get(protocol)); } -void SQL_Driver_manager::put_driver_to_cache(ConstStringPtr protocol, +void SQL_Driver_manager::put_driver_to_cache(const String& protocol, SQL_Driver& driver) { SYNCHRONIZED; @@ -215,7 +274,7 @@ void SQL_Driver_manager::put_driver_to_c // connection cache /// @todo get rid of memory spending Stack [zeros deep inside got accumulated] -SQL_ConnectionPtr SQL_Driver_manager::get_connection_from_cache(ConstStringPtr url) { +SQL_Connection *SQL_Driver_manager::get_connection_from_cache(const String& url) { SYNCHRONIZED; if(Stack *connections=static_cast(connection_cache.get(url))) @@ -228,7 +287,7 @@ SQL_ConnectionPtr SQL_Driver_manager::ge return 0; } -void SQL_Driver_manager::put_connection_to_cache(ConstStringPtr url, +void SQL_Driver_manager::put_connection_to_cache(const String& url, SQL_Connection& connection) { SYNCHRONIZED; @@ -278,7 +337,7 @@ static void add_connections_to_status_ca for(int countdown=stack.top_index(); countdown-->=0; ) add_connection_to_status_cache_table(iter.next(), info); } -ValuePtr SQL_Driver_manager::get_status(Pool& pool, ConstStringPtr source) { +Value& SQL_Driver_manager::get_status(Pool& pool, const String *source) { VHash& result=*new(pool) VHash(pool); // cache