--- parser3/src/main/pa_sql_driver_manager.C 2002/09/04 14:59:54 1.65 +++ parser3/src/main/pa_sql_driver_manager.C 2003/12/11 09:22:09 1.78 @@ -1,196 +1,135 @@ /** @file Parser: sql driver manager implementation. - Copyright (c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com) + 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: 2002/09/04 14:59:54 $"; +static const char * const IDENT_SQL_DRIVER_MANAGER_C="$Date: 2003/12/11 09:22:09 $"; #include "pa_sql_driver_manager.h" #include "ltdl.h" +#include "pa_threads.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=0; // consts -const int EXPIRE_UNUSED_CONNECTION_SECONDS=60; -const int CHECK_EXPIRED_CONNECTIONS_SECONDS=EXPIRE_UNUSED_CONNECTION_SECONDS*2; +const time_t EXPIRE_UNUSED_CONNECTION_SECONDS=60; +const time_t CHECK_EXPIRED_CONNECTIONS_SECONDS=EXPIRE_UNUSED_CONNECTION_SECONDS*2; // helpers -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("@"); - if(at_pos>0) - result << url.mid(at_pos, url.size()); +const String& SQL_Driver_services_impl::url_without_login() const { + String& result=*new String; + result << furl->mid(0, furl->pos(':')) << "://****"; + + size_t at_pos=furl->pos('@'); + if(at_pos!=STRING_NOT_FOUND) + result << furl->mid(at_pos, furl->length()); 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 char *comment) { - // hiding passwords and addresses from accidental show [imagine user forgot @exception] -#ifdef PA_WITH_SJLJ_EXCEPTIONS - throw -#else - e= -#endif - Exception("sql.connect", - &url_without_login(pool(), furl), - comment); - -#ifndef PA_WITH_SJLJ_EXCEPTIONS - longjmp(mark, 1); -#endif - } - virtual void propagate_exception() { -#ifndef PA_WITH_SJLJ_EXCEPTIONS - throw e; -#endif - } - -private: - const String& furl; - Exception e; -}; - // helpers -static void expire_connection(Array::Item *value, void *info) { - SQL_Connection& connection=*static_cast(value); - time_t older_dies=reinterpret_cast(info); - +static void expire_connection(SQL_Connection& connection, time_t older_dies) { 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(value); - for(int i=0; i<=stack.top_index(); i++) - expire_connection(stack.get(i), info); +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(size_t i=0; itop_index(); i++) + expire_connection(*stack->get(i), older_dies); } // 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(): + is_dlinited(false), prev_expiration_pass_time(0) { } SQL_Driver_manager::~SQL_Driver_manager() { - connection_cache.for_each(expire_connections, - reinterpret_cast(time(0)+1/*=in future=expire all*/)); -} + connection_cache.for_each(expire_connections, time(0)+(time_t)1/*=in future=expire all*/); -/// @param request_url protocol://[driver-dependent] -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 + if(is_dlinited) + lt_dlexit(); +} +/// @param aurl protocol://[driver-dependent] +SQL_Connection* SQL_Driver_manager::get_connection(const String& aurl, + Table *protocol2driver_and_client) { // we have table for locating protocol's library if(!protocol2driver_and_client) throw Exception("parser.runtime", - &request_url, + &aurl, "$"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); + SQL_Connection* connection=get_connection_from_cache(aurl); if(connection) { - connection->set_services(services); + connection->set_url(); if(!connection->ping()) { // we have some cached connection, is it pingable? connection->disconnect(); // kill unpingabe=dead connection connection=0; } } - char *request_url_cstr; + char *url_cstr; if(connection) - request_url_cstr=0; // calm, compiler + url_cstr=0; // calm, compiler else { // no cached connection or it were unpingabe: connect/reconnect - int pos=request_url.pos("://", 3); - if(pos<0) + url_cstr=aurl.cstrm(); + if(!strstr(url_cstr, "://")) throw Exception("parser.runtime", - request_url.size()?&request_url:&request_origin, + aurl.length()?&aurl:0, "connection string must start with protocol://"); - // make global_url C-string on global pool - request_url_cstr=request_url.cstr(); - char *global_url_cstr=(char *)malloc(strlen(request_url_cstr)+1); - strcpy(global_url_cstr, request_url_cstr); - // make global_url string on global pool - String& global_url=*new(this->pool()) String(this->pool(), global_url_cstr); - - char *request_protocol_cstr=lsplit(&request_url_cstr, ':'); + + char *protocol_cstr=lsplit(&url_cstr, ':'); // skip "//" after ':' - while(*request_url_cstr=='/') - request_url_cstr++; - // make global_protocol C-string on global pool - char *global_protocol_cstr=(char *)malloc(strlen(request_protocol_cstr)+1); - strcpy(global_protocol_cstr, request_protocol_cstr); - // make global_protocol string on global pool - String& global_protocol=*new(this->pool()) String(this->pool(), - global_protocol_cstr); + while(*url_cstr=='/') + url_cstr++; + const String& protocol=*new String(protocol_cstr); SQL_Driver *driver; // first trying to get cached driver - if(!(driver=get_driver_from_cache(global_protocol))) { + if(!(driver=get_driver_from_cache(protocol))) { // no cached - const String *library=0; - const String *dlopen_file_spec=0; - if(protocol2driver_and_client->locate(0, global_protocol)) { - if(!(library=protocol2driver_and_client->item(1)) || library->size()==0) + const String* library=0; + const String* dlopen_file_spec=0; + Table::Action_options options; + if(protocol2driver_and_client->locate(0, protocol, options)) { + if(!(library=protocol2driver_and_client->item(1)) || library->length()==0) throw Exception("parser.runtime", - protocol2driver_and_client->origin_string(), + 0, "driver library column for protocol '%s' is empty", - request_protocol_cstr); + protocol_cstr); dlopen_file_spec=protocol2driver_and_client->item(2); } else throw Exception("parser.runtime", - &request_url, + &aurl, "undefined protocol '%s'", - request_protocol_cstr); + protocol_cstr); - if(lt_dlinit()) - throw Exception(0, - library, - "prepare to dynamic loading failed, %s", lt_dlerror()); + if(!is_dlinited) { + if(lt_dlinit()) + throw Exception(0, + library, + "prepare to dynamic loading failed, %s", lt_dlerror()); - const char *filename=library->cstr(String::UL_FILE_SPEC); + is_dlinited=true; + } + + const char* filename=library->cstr(String::L_FILE_SPEC); lt_dlhandle handle=lt_dlopen(filename); if (!handle) throw Exception(0, @@ -216,67 +155,62 @@ SQL_Connection_ptr SQL_Driver_manager::g driver_api_version, SQL_DRIVER_API_VERSION); // initialise by connecting to sql client dynamic link library - char *dlopen_file_spec_cstr= - dlopen_file_spec && dlopen_file_spec->size()? - dlopen_file_spec->cstr(String::UL_AS_IS):0; - if(const char *error=driver->initialize( - dlopen_file_spec_cstr)) + char* dlopen_file_spec_cstr= + dlopen_file_spec && dlopen_file_spec->length()? + dlopen_file_spec->cstrm(String::L_AS_IS):0; + if(const char* error=driver->initialize(dlopen_file_spec_cstr)) throw Exception(0, library, "driver failed to initialize client library '%s', %s", - dlopen_file_spec_cstr?dlopen_file_spec_cstr:"unspecifed", + dlopen_file_spec_cstr?dlopen_file_spec_cstr:"unspecifed", error); // cache it - put_driver_to_cache(global_protocol, *driver); + put_driver_to_cache(protocol, driver); } - // allocate in global pool - // associate with services[request] - // NOTE: never freed up! - connection=new(this->pool()) SQL_Connection(this->pool(), global_url, *driver); - // associate with services[request] (deassociates at close) - connection->set_services(services); + connection=new SQL_Connection(aurl, *driver); + // associate with pool[request] (deassociates at close) + connection->set_url(); } // if not connected yet, do that now, when connection has services if(!connection->connected()) - connection->connect(request_url_cstr); + connection->connect(url_cstr); // return autoclosing object for it - return SQL_Connection_ptr(connection); + return connection; } -void SQL_Driver_manager::close_connection(const String& url, - SQL_Connection& connection) { - // deassociate from services[request] - connection.set_services(0); +void SQL_Driver_manager::close_connection(connection_cache_type::key_type url, + SQL_Connection* connection) { put_connection_to_cache(url, connection); } // driver cache -SQL_Driver *SQL_Driver_manager::get_driver_from_cache(const String& protocol) { +SQL_Driver *SQL_Driver_manager::get_driver_from_cache(driver_cache_type::key_type protocol) { SYNCHRONIZED; - return static_cast(driver_cache.get(protocol)); + return driver_cache.get(protocol); } -void SQL_Driver_manager::put_driver_to_cache(const String& protocol, - SQL_Driver& driver) { +void SQL_Driver_manager::put_driver_to_cache( + driver_cache_type::key_type protocol, + driver_cache_type::value_type driver) { SYNCHRONIZED; - driver_cache.put(protocol, &driver); + driver_cache.put(protocol, driver); } // 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(connection_cache_type::key_type url) { SYNCHRONIZED; - if(Stack *connections=static_cast(connection_cache.get(url))) - while(connections->top_index()>=0) { // there are cached connections to that 'url' - SQL_Connection *result=static_cast(connections->pop()); + if(connection_cache_type::value_type connections=connection_cache.get(url)) + while(!connections->is_empty()) { // there are cached connections to that 'url' + SQL_Connection* result=connections->pop(); if(result->connected()) // not expired? return result; } @@ -284,69 +218,63 @@ SQL_Connection *SQL_Driver_manager::get_ return 0; } -void SQL_Driver_manager::put_connection_to_cache(const String& url, - SQL_Connection& connection) { +void SQL_Driver_manager::put_connection_to_cache( + connection_cache_type::key_type url, + SQL_Connection* connection) { SYNCHRONIZED; - Stack *connections=static_cast(connection_cache.get(url)); + connection_cache_type::value_type connections=connection_cache.get(url); if(!connections) { // there are no cached connections to that 'url' yet? - connections=NEW Stack(pool()); // NOTE: never freed up! + connections=new connection_cache_element_base_type; connection_cache.put(url, connections); } - connections->push(&connection); + connections->push(connection); } void SQL_Driver_manager::maybe_expire_cache() { time_t now=time(0); if(prev_expiration_pass_time(now-EXPIRE_UNUSED_CONNECTION_SECONDS)); + connection_cache.for_each(expire_connections, time_t(now-EXPIRE_UNUSED_CONNECTION_SECONDS)); prev_expiration_pass_time=now; } } -static void add_connection_to_status_cache_table(Array::Item *value, void *info) { - SQL_Connection& connection=*static_cast(value); - Table& table=*static_cast(info); - +static void add_connection_to_status_cache_table(SQL_Connection& connection, Table* table) { if(connection.connected()) { - Pool& pool=table.pool(); - Array& row=*new(pool) Array(pool); + ArrayString& row=*new ArrayString; // url - row+=&url_without_login(pool, connection.get_url()); + row+=&connection.services().url_without_login(); // time 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); - row+=new(pool) String(pool, safe_time_buf, time_buf_size); + row+=new String(pa_strdup(ctime(&time_used))); - table+=&row; + *table+=&row; } } -static void add_connections_to_status_cache_table(const Hash::Key& key, Hash::Val *value, void *info) { - Stack& stack=*static_cast(value); - Array_iter iter(stack); - for(int countdown=stack.top_index(); countdown-->=0; ) - add_connection_to_status_cache_table(iter.next(), info); +static void add_connections_to_status_cache_table( + SQL_Driver_manager::connection_cache_type::key_type /*key*/, + SQL_Driver_manager::connection_cache_type::value_type stack, Table* table) +{ + for(Array_iterator i(*stack); i.has_next(); ) + add_connection_to_status_cache_table(*i.next(), table); } -Value& SQL_Driver_manager::get_status(Pool& pool, const String *source) { - VHash& result=*new(pool) VHash(pool); - + +Value* SQL_Driver_manager::get_status() { + Value* result=new VHash; + // cache { - Array& columns=*new(pool) Array(pool); - columns+=new(pool) String(pool, "url"); - columns+=new(pool) String(pool, "time"); - Table& table=*new(pool) Table(pool, 0, &columns, connection_cache.size()); + ArrayString& columns=*new ArrayString; + columns+=new String("url"); + columns+=new String("time"); + Table& table=*new Table(&columns, connection_cache.count()); connection_cache.for_each(add_connections_to_status_cache_table, &table); - result.hash(source).put(*new(pool) String(pool, "cache"), new(pool) VTable(pool, &table)); + result->get_hash()->put(*new String("cache"), new VTable(&table)); } return result;