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#include <map>
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#include <memory>
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#ifdef _WIN32
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#include <winsock2.h>
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#endif // _WIN32
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#include "pqxx/except"
00028
#include "pqxx/util"
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namespace pqxx
00041 {
00042
class result;
00043
class transaction_base;
00044
class trigger;
00045
00046
00048
00052 struct PQXX_LIBEXPORT noticer :
PGSTD::unary_function<const char[], void>
00053 {
00054 virtual ~noticer() throw () {}
00055
virtual void operator()(
const char Msg[])
throw () =0;
00056 };
00057
00058
00060
00078 class PQXX_LIBEXPORT connection_base
00079 {
00080
public:
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00087
explicit connection_base(
const PGSTD::string &ConnInfo);
00088
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00094
explicit connection_base(
const char ConnInfo[]);
00095
00097
virtual ~connection_base() =0;
00098
00100
void disconnect()
throw ();
00101
00103
bool is_open()
const throw ();
00104
00106
00114
template<
typename TRANSACTOR>
00115
void perform(
const TRANSACTOR &T,
int Attempts=3);
00116
00117
#ifdef PQXX_BROKEN_MEMBER_TEMPLATE_DEFAULT_ARG
00118
template<
typename TRANSACTOR>
void perform(TRANSACTOR &T,
int Attempts);
00119
template<
typename TRANSACTOR>
00120
void perform(
const TRANSACTOR &T) { perform(T, 3); }
00121
#endif
00122
00123
00125
00134 PGSTD::auto_ptr<noticer> set_noticer(PGSTD::auto_ptr<noticer> N)
00135
throw ();
00136 noticer *get_noticer() const throw () {
return m_Noticer.get(); }
00137
00139
void process_notice(
const char[]) throw ();
00141
void process_notice(const PGSTD::string &msg) throw ();
00142
00144
void trace(FILE *) throw ();
00145
00147
00151
int get_notifs();
00152
00153
00154
00156 const
char *dbname()
00157 { halfconnect();
return PQdb(m_Conn); }
00158
00160 const char *username()
00161 { halfconnect();
return PQuser(m_Conn); }
00162
00164 const char *hostname()
00165 { halfconnect();
return PQhost(m_Conn); }
00166
00168 const char *port()
00169 { halfconnect();
return PQport(m_Conn); }
00170
00172 const char *options() const throw ()
00173 {
return m_ConnInfo.c_str(); }
00174
00175
00177
00184 int backendpid() const throw ()
00185 {
return m_Conn ? PQbackendPID(m_Conn) : 0; }
00186
00188
00198 void activate() { Connect(); }
00199
00201
00209
void deactivate();
00210
00212
00218 void set_client_encoding(
const PGSTD::string &Encoding)
00219 { set_variable(
"CLIENT_ENCODING", Encoding); }
00220
00222
00236
void set_variable(
const PGSTD::string &Var,
00237
const PGSTD::string &Value);
00238
00240
00246 PGSTD::string get_variable(
const PGSTD::string &);
00247
00249
00252
int await_notification();
00253
00255
00258
int await_notification(
long seconds,
long microseconds);
00259
00260
#ifdef PQXX_DEPRECATED_HEADERS
00261
00262
void Disconnect() throw () { disconnect(); }
00264
template<
typename TRANSACTOR>
void Perform(
const TRANSACTOR &T,
int A=3)
00265 {
return perform(T,A); }
00267 PGSTD::auto_ptr<noticer> SetNoticer(PGSTD::auto_ptr<noticer> N)
00268 {
return set_noticer(N); }
00270 noticer *GetNoticer() const throw ()
00271 {
return get_noticer(); }
00273
void ProcessNotice(
const char msg[])
throw () {
return process_notice(msg); }
00275
void ProcessNotice(
const PGSTD::string &msg)
throw ()
00276 {
return process_notice(msg); }
00278
void Trace(FILE *F) { trace(F); }
00280
void GetNotifs() { get_notifs(); }
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const char *DbName() {
return dbname(); }
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const char *UserName() {
return username(); }
00286
const char *HostName() {
return hostname(); }
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const char *Port() {
return port(); }
00290
const char *Options() const throw () {
return options(); }
00292
int BackendPID()
const {
return backendpid(); }
00294
void Activate() { activate(); }
00296
void Deactivate() { deactivate(); }
00298
void SetClientEncoding(
const PGSTD::string &E) { set_client_encoding(E); }
00300
void SetVariable(
const PGSTD::string &Var,
const PGSTD::string &Val)
00301 { set_variable(Var, Val); }
00302
#endif
00303
00304
00305
protected:
00307
void Connect();
00308
00310
virtual void startconnect() =0;
00311
00313
virtual void completeconnect() =0;
00314
00316 virtual void dropconnect() throw () {}
00317
00319 PGconn *get_conn() const throw () {
return m_Conn; }
00320
00322 void set_conn(PGconn *C)
throw () { m_Conn = C; }
00323
00324
void wait_read() const;
00325
void wait_read(
long seconds,
long microseconds) const;
00326
void wait_write() const;
00327
00328 private:
00329
void SetupState();
00330
void InternalSetTrace() throw ();
00331
int Status()
const {
return PQstatus(m_Conn); }
00332
const char *ErrMsg() const;
00333
void Reset();
00334
void close() throw ();
00335
void RestoreVars();
00336
void halfconnect();
00337
int set_fdmask() const;
00338
void clear_fdmask() throw ();
00339
void go_sync();
00340
void go_async();
00341 PGSTD::string RawGetVar(const PGSTD::string &);
00342
void process_notice_raw(const
char msg[]) throw ();
00343
00344
00346 PGSTD::string m_ConnInfo;
00347
00349 PGconn *m_Conn;
00351 internal::unique<transaction_base> m_Trans;
00352
00354 PGSTD::auto_ptr<noticer> m_Noticer;
00356 FILE *m_Trace;
00357
00358 typedef PGSTD::multimap<PGSTD::string, pqxx::trigger *> TriggerList;
00360 TriggerList m_Triggers;
00361
00363 PGSTD::map<PGSTD::string, PGSTD::string> m_Vars;
00364
00365 mutable fd_set m_fdmask;
00366
00367 friend class transaction_base;
00368 result Exec(const
char[],
int Retries);
00369 result exec_prepared(const
char[],
00370
int NumParams,
00371 const
char *const *Params,
00372
int Retries);
00373
void RegisterTransaction(transaction_base *);
00374
void UnregisterTransaction(transaction_base *) throw ();
00375
void MakeEmpty(result &, ExecStatusType=PGRES_EMPTY_QUERY);
00376
bool ReadCopyLine(PGSTD::string &);
00377
bool WriteCopyLine(const PGSTD::string &,
bool async=false);
00378
void EndCopyWrite();
00379
void start_exec(const PGSTD::string &);
00380 PGresult *get_result();
00381
00382
void RawSetVar(const PGSTD::string &Var, const PGSTD::string &Value);
00383
void AddVariables(const PGSTD::map<PGSTD::string, PGSTD::string> &);
00384
00385 friend class largeobject;
00386 PGconn *RawConnection()
const {
return m_Conn; }
00387
00388
friend class trigger;
00389
void AddTrigger(trigger *);
00390
void RemoveTrigger(trigger *) throw ();
00391
00392
00393 connection_base(const connection_base &);
00394 connection_base &operator=(const connection_base &);
00395 };
00396
00397
00398 }
00399
00400
00401
00402 inline pqxx::connection_base::~connection_base()
00403 {
00404 close();
00405 }
00406
00407