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| version 1.69.2.7, 2003/01/29 12:02:24 | version 1.70, 2003/04/11 15:00:05 |
|---|---|
| Line 9 static const char* IDENT_SQL_DRIVER_MANA | Line 9 static const char* IDENT_SQL_DRIVER_MANA |
| #include "pa_sql_driver_manager.h" | #include "pa_sql_driver_manager.h" |
| #include "ltdl.h" | #include "ltdl.h" |
| #include "pa_threads.h" | |
| #include "pa_sql_connection.h" | #include "pa_sql_connection.h" |
| #include "pa_exception.h" | #include "pa_exception.h" |
| #include "pa_common.h" | #include "pa_common.h" |
| #include "pa_value_includes.h" | #include "pa_threads.h" |
| #include "pa_stack.h" | |
| #include "pa_vhash.h" | #include "pa_vhash.h" |
| #include "pa_vtable.h" | #include "pa_vtable.h" |
| // globals | // globals |
| SQL_Driver_manager SQL_driver_manager; | SQL_Driver_manager *SQL_driver_manager; |
| // consts | // consts |
| const time_t EXPIRE_UNUSED_CONNECTION_SECONDS=60; | const int EXPIRE_UNUSED_CONNECTION_SECONDS=60; |
| const time_t CHECK_EXPIRED_CONNECTIONS_SECONDS=EXPIRE_UNUSED_CONNECTION_SECONDS*2; | const int CHECK_EXPIRED_CONNECTIONS_SECONDS=EXPIRE_UNUSED_CONNECTION_SECONDS*2; |
| // helpers | // helpers |
| ConstStringPtr SQL_Driver_services_impl::url_without_login() const { | const String& url_without_login(Pool& pool, const String& url) { |
| StringPtr result(new String); | String& result=*new(pool) String(pool); |
| *result << furl->mid(0, furl->pos(":")) << "://****"; | result << url.mid(0, url.pos(":")) << "://****"; |
| int at_pos=furl->pos("@"); | int at_pos=url.pos("@"); |
| if(at_pos>0) | if(at_pos>0) |
| *result << furl->mid(at_pos, furl->size()); | result << url.mid(at_pos, url.size()); |
| return result; | 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<const String*>(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 | // 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<SQL_Connection *>(value); | |
| time_t older_dies=reinterpret_cast<time_t>(info); | |
| if(connection.connected() && connection.expired(older_dies)) | if(connection.connected() && connection.expired(older_dies)) |
| connection.disconnect(); | connection.disconnect(); |
| } | } |
| static void expire_connections( | static void expire_connections(const Hash::Key& key, Hash::Val *value, void *info) { |
| SQL_Driver_manager::connection_cache_type::key_type /*key*/, | Stack& stack=*static_cast<Stack *>(value); |
| SQL_Driver_manager::connection_cache_type::value_type stack, | for(int i=0; i<=stack.top_index(); i++) |
| time_t older_dies) { | expire_connection(stack.get(i), info); |
| for(int i=0; i<=stack->top_index(); i++) | |
| expire_connection(*stack->get(i), older_dies); | |
| } | } |
| // SQL_Driver_manager | // SQL_Driver_manager |
| SQL_Driver_manager::SQL_Driver_manager(): | SQL_Driver_manager::SQL_Driver_manager(Pool& apool) : Cache_manager(apool), |
| prev_expiration_pass_time(0) { | driver_cache(apool), |
| connection_cache(apool), | |
| cache_managers.put(ConstStringPtr(new String("sql")), this); | prev_expiration_pass_time(0) { |
| } | } |
| SQL_Driver_manager::~SQL_Driver_manager() { | 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<void *>(time(0)+1/*=in future=expire all*/)); | |
| } | } |
| /// @param aurl protocol://[driver-dependent] | /// @param request_url protocol://[driver-dependent] |
| SQL_ConnectionPtr SQL_Driver_manager::get_connection(Pool& apool, ConstStringPtr arequest_url, | SQL_Connection_ptr SQL_Driver_manager::get_connection(const String& request_url, |
| ConstStringPtr aorigin, | const String& request_origin, |
| Table *protocol2driver_and_client) { | Table *protocol2driver_and_client) { |
| Pool& pool=request_origin.pool(); // request pool | |
| // we have table for locating protocol's library | // we have table for locating protocol's library |
| if(!protocol2driver_and_client) | if(!protocol2driver_and_client) |
| throw Exception("parser.runtime", | throw Exception("parser.runtime", |
| arequest_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_ConnectionPtr connection=get_connection_from_cache(arequest_url); | SQL_Connection *connection=get_connection_from_cache(request_url); |
| if(connection) { | if(connection) { |
| connection->set_pool(&apool); | connection->set_services(services); |
| if(!connection->ping()) { // we have some cached connection, is it pingable? | if(!connection->ping()) { // we have some cached connection, is it pingable? |
| connection->disconnect(); // kill unpingabe=dead connection | connection->disconnect(); // kill unpingabe=dead connection |
| connection=SQL_ConnectionPtr(0); | connection=0; |
| } | } |
| } | } |
| Line 89 SQL_ConnectionPtr SQL_Driver_manager::ge | Line 144 SQL_ConnectionPtr SQL_Driver_manager::ge |
| if(connection) | if(connection) |
| request_url_cstr=0; // calm, compiler | request_url_cstr=0; // calm, compiler |
| else { // no cached connection or it were unpingabe: connect/reconnect | else { // no cached connection or it were unpingabe: connect/reconnect |
| if(arequest_url->pos("://")<0) | int pos=request_url.pos("://", 3); |
| if(pos<0) | |
| throw Exception("parser.runtime", | throw Exception("parser.runtime", |
| arequest_url->size()?arequest_url:aorigin, | request_url.size()?&request_url:&request_origin, |
| "connection string must start with protocol://"); | "connection string must start with protocol://"); |
| // make global_url C-string on driver_cache_pool pool | // make global_url C-string on global pool |
| StringPtr global_url(new String(arequest_url->cstr(driver_cache_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); | |
| request_url_cstr=arequest_url->cstr(); | |
| char *request_protocol_cstr=lsplit(&request_url_cstr, ':'); | char *request_protocol_cstr=lsplit(&request_url_cstr, ':'); |
| // skip "//" after ':' | // skip "//" after ':' |
| while(*request_url_cstr=='/') | while(*request_url_cstr=='/') |
| request_url_cstr++; | request_url_cstr++; |
| // make global_protocol C-string on driver_cache_pool pool | // make global_protocol C-string on global pool |
| StringPtr global_protocol(new String(driver_cache_pool.copy(request_protocol_cstr))); | 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); | |
| SQL_Driver *driver; | SQL_Driver *driver; |
| // first trying to get cached driver | // first trying to get cached driver |
| if(!(driver=get_driver_from_cache(global_protocol))) { | if(!(driver=get_driver_from_cache(global_protocol))) { |
| // no cached | // no cached |
| ConstStringPtr library(0); | const String *library=0; |
| ConstStringPtr dlopen_file_spec(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) | if(!(library=protocol2driver_and_client->item(1)) || library->size()==0) |
| throw Exception("parser.runtime", | throw Exception("parser.runtime", |
| protocol2driver_and_client->origin_string(), | protocol2driver_and_client->origin_string(), |
| Line 120 SQL_ConnectionPtr SQL_Driver_manager::ge | Line 184 SQL_ConnectionPtr SQL_Driver_manager::ge |
| dlopen_file_spec=protocol2driver_and_client->item(2); | dlopen_file_spec=protocol2driver_and_client->item(2); |
| } else | } else |
| throw Exception("parser.runtime", | throw Exception("parser.runtime", |
| arequest_url, | &request_url, |
| "undefined protocol '%s'", | "undefined protocol '%s'", |
| request_protocol_cstr); | request_protocol_cstr); |
| Line 155 SQL_ConnectionPtr SQL_Driver_manager::ge | Line 219 SQL_ConnectionPtr SQL_Driver_manager::ge |
| driver_api_version, SQL_DRIVER_API_VERSION); | driver_api_version, SQL_DRIVER_API_VERSION); |
| // initialise by connecting to sql client dynamic link library | // initialise by connecting to sql client dynamic link library |
| CharPtr dlopen_file_spec_cstr= | char *dlopen_file_spec_cstr= |
| dlopen_file_spec && dlopen_file_spec->size()? | dlopen_file_spec && dlopen_file_spec->size()? |
| dlopen_file_spec->cstr(String::UL_AS_IS):CharPtrZero; | dlopen_file_spec->cstr(String::UL_AS_IS):0; |
| if(const char *error=driver->initialize( | if(const char *error=driver->initialize( |
| dlopen_file_spec_cstr)) | dlopen_file_spec_cstr)) |
| throw Exception(0, | throw Exception(0, |
| Line 167 SQL_ConnectionPtr SQL_Driver_manager::ge | Line 231 SQL_ConnectionPtr SQL_Driver_manager::ge |
| error); | error); |
| // cache it | // cache it |
| put_driver_to_cache(global_protocol, driver); | put_driver_to_cache(global_protocol, *driver); |
| } | } |
| connection=SQL_ConnectionPtr(new SQL_Connection(global_url, *driver)); | // allocate in global pool |
| // associate with pool[request] (deassociates at close) | // associate with services[request] |
| connection->set_pool(&apool); | // 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); | |
| } | } |
| // if not connected yet, do that now, when connection has services | // if not connected yet, do that now, when connection has services |
| if(!connection->connected()) | if(!connection->connected()) |
| connection->connect(request_url_cstr); | connection->connect(request_url_cstr); |
| // return autoclosing object for it | // return autoclosing object for it |
| return SQL_ConnectionPtr(connection); | return SQL_Connection_ptr(connection); |
| } | } |
| void SQL_Driver_manager::close_connection(connection_cache_type::key_type url, | void SQL_Driver_manager::close_connection(const String& url, |
| SQL_ConnectionPtr connection) { | SQL_Connection& connection) { |
| // deassociate from pool[request] | // deassociate from services[request] |
| connection->set_pool(0); | connection.set_services(0); |
| put_connection_to_cache(url, connection); | put_connection_to_cache(url, connection); |
| } | } |
| // driver cache | // driver cache |
| SQL_Driver *SQL_Driver_manager::get_driver_from_cache(driver_cache_type::key_type protocol) { | SQL_Driver *SQL_Driver_manager::get_driver_from_cache(const String& protocol) { |
| SYNCHRONIZED; | SYNCHRONIZED; |
| return driver_cache.get(protocol); | return static_cast<SQL_Driver *>(driver_cache.get(protocol)); |
| } | } |
| void SQL_Driver_manager::put_driver_to_cache( | void SQL_Driver_manager::put_driver_to_cache(const String& protocol, |
| driver_cache_type::key_type protocol, | SQL_Driver& driver) { |
| driver_cache_type::value_type driver) { | |
| SYNCHRONIZED; | SYNCHRONIZED; |
| driver_cache.put(protocol, driver); | driver_cache.put(protocol, &driver); |
| } | } |
| // connection cache | // connection cache |
| SQL_ConnectionPtr SQL_Driver_manager::get_connection_from_cache( | /// @todo get rid of memory spending Stack [zeros deep inside got accumulated] |
| connection_cache_type::key_type url) { | SQL_Connection *SQL_Driver_manager::get_connection_from_cache(const String& url) { |
| SYNCHRONIZED; | SYNCHRONIZED; |
| if(connection_cache_type::value_type connections=connection_cache.get(url)) | if(Stack *connections=static_cast<Stack *>(connection_cache.get(url))) |
| while(connections->top_index()>=0) { // there are cached connections to that 'url' | while(connections->top_index()>=0) { // there are cached connections to that 'url' |
| SQL_ConnectionPtr result=connections->pop(); | SQL_Connection *result=static_cast<SQL_Connection *>(connections->pop()); |
| if(result->connected()) // not expired? | if(result->connected()) // not expired? |
| return result; | return result; |
| } | } |
| Line 221 SQL_ConnectionPtr SQL_Driver_manager::ge | Line 287 SQL_ConnectionPtr SQL_Driver_manager::ge |
| return 0; | return 0; |
| } | } |
| void SQL_Driver_manager::put_connection_to_cache( | void SQL_Driver_manager::put_connection_to_cache(const String& url, |
| connection_cache_type::key_type url, | SQL_Connection& connection) { |
| SQL_ConnectionPtr connection) { | |
| SYNCHRONIZED; | SYNCHRONIZED; |
| connection_cache_type::value_type connections=connection_cache.get(url); | Stack *connections=static_cast<Stack *>(connection_cache.get(url)); |
| if(!connections) { // there are no cached connections to that 'url' yet? | if(!connections) { // there are no cached connections to that 'url' yet? |
| connections=connection_cache_type::value_type(new connection_cache_type::value_type::element_type); | connections=NEW Stack(pool()); // NOTE: never freed up! |
| connection_cache.put(url, connections); | connection_cache.put(url, connections); |
| } | } |
| connections->push(connection); | connections->push(&connection); |
| } | } |
| void SQL_Driver_manager::maybe_expire_cache() { | void SQL_Driver_manager::maybe_expire_cache() { |
| time_t now=time(0); | time_t now=time(0); |
| if(prev_expiration_pass_time<now-CHECK_EXPIRED_CONNECTIONS_SECONDS) { | if(prev_expiration_pass_time<now-CHECK_EXPIRED_CONNECTIONS_SECONDS) { |
| connection_cache.for_each(expire_connections, time_t(now-EXPIRE_UNUSED_CONNECTION_SECONDS)); | connection_cache.for_each(expire_connections, |
| reinterpret_cast<void *>(now-EXPIRE_UNUSED_CONNECTION_SECONDS)); | |
| prev_expiration_pass_time=now; | prev_expiration_pass_time=now; |
| } | } |
| } | } |
| /* | |
| static void add_connection_to_status_cache_table(Array::Item *value, void *info) { | static void add_connection_to_status_cache_table(Array::Item *value, void *info) { |
| SQL_Connection& connection=*static_cast<SQL_Connection *>(value); | SQL_Connection& connection=*static_cast<SQL_Connection *>(value); |
| Table& table=*static_cast<Table *>(info); | Table& table=*static_cast<Table *>(info); |
| Line 270 static void add_connections_to_status_ca | Line 336 static void add_connections_to_status_ca |
| Array_iter iter(stack); | Array_iter iter(stack); |
| for(int countdown=stack.top_index(); countdown-->=0; ) | for(int countdown=stack.top_index(); countdown-->=0; ) |
| add_connection_to_status_cache_table(iter.next(), info); | add_connection_to_status_cache_table(iter.next(), info); |
| }*/ | } |
| /// @todo convert to object_ptr | 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); |
| ValuePtr result(new VHash); | |
| /* | |
| // cache | // cache |
| { | { |
| Array& columns=*new(pool) Array(pool); | Array& columns=*new(pool) Array(pool); |
| Line 285 ValuePtr SQL_Driver_manager::get_status( | Line 350 ValuePtr SQL_Driver_manager::get_status( |
| connection_cache.for_each(add_connections_to_status_cache_table, &table); | 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.hash(source).put(*new(pool) String(pool, "cache"), new(pool) VTable(pool, &table)); |
| }*/ | } |
| return result; | return result; |
| } | } |