--- parser3/src/main/pa_sql_driver_manager.C 2001/11/11 10:53:48 1.54 +++ parser3/src/main/pa_sql_driver_manager.C 2003/01/27 16:19:11 1.69.2.2 @@ -1,25 +1,24 @@ /** @file Parser: sql driver manager implementation. - Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com) - Author: Alexander Petrosyan (http://paf.design.ru) - - $Id: pa_sql_driver_manager.C,v 1.54 2001/11/11 10:53:48 paf Exp $ + Copyright (c) 2001, 2003 ArtLebedev Group (http://www.artlebedev.com) + Author: Alexandr Petrosian (http://paf.design.ru) */ +static const char* IDENT_SQL_DRIVER_MANAGER_C="$Date: 2003/01/27 16:19:11 $"; + #include "pa_sql_driver_manager.h" #include "ltdl.h" #include "pa_sql_connection.h" #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 @@ -28,7 +27,7 @@ const int CHECK_EXPIRED_CONNECTIONS_SECO // helpers -const String& url_without_login(Pool& pool, const String& url) { +ConstStringPtr url_without_login(Pool& pool, ConstStringPtr url) { String& result=*new(pool) String(pool); result << url.mid(0, url.pos(":")) << "://****"; @@ -42,7 +41,7 @@ const String& url_without_login(Pool& po /// 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), + SQL_Driver_services_impl(Pool& apool, ConstStringPtr aurl) : Pooled(apool), furl(aurl) { } @@ -50,25 +49,41 @@ public: 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 char *comment) { + virtual void _throw(const SQL_Error& aexception) { + // converting SQL_exception to parser Exception // hiding passwords and addresses from accidental show [imagine user forgot @exception] - e=Exception(0, 0, - &url_without_login(pool(), furl), - comment); +#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() { - throw e; +#ifndef PA_WITH_SJLJ_EXCEPTIONS + throw fexception; +#endif } private: - const String& furl; - Exception e; + ConstStringPtr furl; + Exception fexception; }; // helpers @@ -88,26 +103,24 @@ static void expire_connections(const Has // SQL_Driver_manager -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(): + prev_expiration_pass_time(0) { } SQL_Driver_manager::~SQL_Driver_manager() { connection_cache.for_each(expire_connections, - reinterpret_cast((time_t)0/*=in past=expire all*/)); + reinterpret_cast(time(0)+1/*=in future=expire all*/)); } /// @param request_url protocol://[driver-dependent] -SQL_Connection& SQL_Driver_manager::get_connection(const String& request_url, - const String& request_origin, +SQL_ConnectionPtr SQL_Driver_manager::get_connection(ConstStringPtr request_url, + ConstStringPtr 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(0, 0, + throw Exception("parser.runtime", &request_url, "$"MAIN_SQL_NAME":"MAIN_SQL_DRIVERS_NAME" table must be defined"); @@ -115,24 +128,24 @@ SQL_Connection& SQL_Driver_manager::get_ SQL_Driver_services *services=new(pool) SQL_Driver_services_impl(pool, request_url); // first trying to get cached connection - SQL_Connection *result=get_connection_from_cache(request_url); - if(result) { - result->set_services(services); - if(!result->ping()) { // we have some cached connection, is it pingable? - result->disconnect(); // kill unpingabe=dead connection - result=0; + SQL_Connection *connection=get_connection_from_cache(request_url); + if(connection) { + connection->set_services(services); + if(!connection->ping()) { // we have some cached connection, is it pingable? + connection->disconnect(); // kill unpingabe=dead connection + connection=0; } } char *request_url_cstr; - if(result) + if(connection) request_url_cstr=0; // calm, compiler else { // no cached connection or it were unpingabe: connect/reconnect int pos=request_url.pos("://", 3); if(pos<0) - throw Exception(0, 0, + throw Exception("parser.runtime", request_url.size()?&request_url:&request_origin, - "connection string must start with protocol://"); // NOTE: not THROW, but PTHROW + "connection string must start with protocol://"); // make global_url C-string on global pool request_url_cstr=request_url.cstr(); @@ -160,33 +173,33 @@ SQL_Connection& SQL_Driver_manager::get_ const String *dlopen_file_spec=0; if(protocol2driver_and_client->locate(0, global_protocol)) { if(!(library=protocol2driver_and_client->item(1)) || library->size()==0) - throw Exception(0, 0, + throw Exception("parser.runtime", protocol2driver_and_client->origin_string(), "driver library column for protocol '%s' is empty", request_protocol_cstr); dlopen_file_spec=protocol2driver_and_client->item(2); } else - throw Exception(0, 0, + throw Exception("parser.runtime", &request_url, "undefined protocol '%s'", request_protocol_cstr); if(lt_dlinit()) - throw Exception(0, 0, + throw Exception(0, library, "prepare to dynamic loading failed, %s", lt_dlerror()); const char *filename=library->cstr(String::UL_FILE_SPEC); lt_dlhandle handle=lt_dlopen(filename); if (!handle) - throw Exception(0, 0, + throw Exception(0, library, "can not open the module, %s", lt_dlerror()); SQL_Driver_create_func create=(SQL_Driver_create_func)lt_dlsym(handle, SQL_DRIVER_CREATE_NAME); if(!create) - throw Exception(0, 0, + throw Exception(0, library, "function '"SQL_DRIVER_CREATE_NAME"' was not found"); @@ -196,7 +209,7 @@ SQL_Connection& SQL_Driver_manager::get_ // validate driver api version int driver_api_version=driver->api_version(); if(driver_api_version!=SQL_DRIVER_API_VERSION) - throw Exception(0, 0, + throw Exception(0, library, "driver implements API version 0x%04X not equal to 0x%04X", driver_api_version, SQL_DRIVER_API_VERSION); @@ -207,7 +220,7 @@ SQL_Connection& SQL_Driver_manager::get_ dlopen_file_spec->cstr(String::UL_AS_IS):0; if(const char *error=driver->initialize( dlopen_file_spec_cstr)) - throw Exception(0, 0, + throw Exception(0, library, "driver failed to initialize client library '%s', %s", dlopen_file_spec_cstr?dlopen_file_spec_cstr:"unspecifed", @@ -220,19 +233,19 @@ SQL_Connection& SQL_Driver_manager::get_ // allocate in global pool // associate with services[request] // NOTE: never freed up! - result=new(this->pool()) SQL_Connection(this->pool(), global_url, *driver); + connection=new(this->pool()) SQL_Connection(this->pool(), global_url, *driver); // associate with services[request] (deassociates at close) - result->set_services(services); + connection->set_services(services); } - // if not connected yet, do that now, when result has services - if(!result->connected()) - result->connect(request_url_cstr); - // return it - return *result; + // 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); } -void SQL_Driver_manager::close_connection(const String& url, +void SQL_Driver_manager::close_connection(ConstStringPtr url, SQL_Connection& connection) { // deassociate from services[request] connection.set_services(0); @@ -242,13 +255,13 @@ void SQL_Driver_manager::close_connectio // driver cache -SQL_Driver *SQL_Driver_manager::get_driver_from_cache(const String& protocol) { +SQL_Driver *SQL_Driver_manager::get_driver_from_cache(ConstStringPtr protocol) { SYNCHRONIZED; return static_cast(driver_cache.get(protocol)); } -void SQL_Driver_manager::put_driver_to_cache(const String& protocol, +void SQL_Driver_manager::put_driver_to_cache(ConstStringPtr protocol, SQL_Driver& driver) { SYNCHRONIZED; @@ -257,7 +270,7 @@ void SQL_Driver_manager::put_driver_to_c // connection cache /// @todo get rid of memory spending Stack [zeros deep inside got accumulated] -SQL_Connection *SQL_Driver_manager::get_connection_from_cache(const String& url) { +SQL_Connection *SQL_Driver_manager::get_connection_from_cache(ConstStringPtr url) { SYNCHRONIZED; if(Stack *connections=static_cast(connection_cache.get(url))) @@ -270,7 +283,7 @@ SQL_Connection *SQL_Driver_manager::get_ return 0; } -void SQL_Driver_manager::put_connection_to_cache(const String& url, +void SQL_Driver_manager::put_connection_to_cache(ConstStringPtr url, SQL_Connection& connection) { SYNCHRONIZED; @@ -304,8 +317,8 @@ static void add_connection_to_status_cac // url row+=&url_without_login(pool, connection.get_url()); // time - time_t time_stamp=connection.get_time_stamp(); - const char *unsafe_time_cstr=ctime(&time_stamp); + time_t time_used=connection.get_time_used(); + const char *unsafe_time_cstr=ctime(&time_used); int time_buf_size=strlen(unsafe_time_cstr); char *safe_time_buf=(char *)pool.malloc(time_buf_size); memcpy(safe_time_buf, unsafe_time_cstr, time_buf_size); @@ -320,9 +333,7 @@ static void add_connections_to_status_ca for(int countdown=stack.top_index(); countdown-->=0; ) add_connection_to_status_cache_table(iter.next(), info); } - - -Value& SQL_Driver_manager::get_status(Pool& pool, const String *source) { +ValuePtr SQL_Driver_manager::get_status(Pool& pool, ConstStringPtr source) { VHash& result=*new(pool) VHash(pool); // cache @@ -338,4 +349,4 @@ Value& SQL_Driver_manager::get_status(Po } return result; -} \ No newline at end of file +}