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#include <sqlext.h>
#include <syslog.h>
#include <stdio.h>
#include <string.h>
#include "connection.h"
#include "error.h"
ODBC::Connection::Connection(const DSN& d) :
env(0),
conn(0),
txDepth(0),
txAborted(false)
{
connectPre();
RETCODE dberr = SQLConnect(conn, (SQLCHAR*)d.dsn.c_str(), SQL_NTS,
(SQLCHAR*)d.username.c_str(), SQL_NTS, (SQLCHAR*)d.password.c_str(), SQL_NTS);
if (!SQL_SUCCEEDED(dberr)) {
throw ConnectionError(dberr, SQL_HANDLE_DBC, conn, "Connect");
}
connectPost();
}
void
ODBC::Connection::connectPre()
{
SQLRETURN dberr = SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &env);
if (!SQL_SUCCEEDED(dberr)) {
throw ConnectionError(dberr, SQL_HANDLE_ENV, env, "Allocate handle");
}
dberr = SQLSetEnvAttr(env, SQL_ATTR_ODBC_VERSION, (void *) SQL_OV_ODBC3, 0);
if (!SQL_SUCCEEDED(dberr)) {
throw ConnectionError(dberr, SQL_HANDLE_ENV, env, "Set ODBC version");
}
dberr = SQLAllocHandle(SQL_HANDLE_DBC, env, &conn);
if (!SQL_SUCCEEDED(dberr)) {
throw ConnectionError(dberr, SQL_HANDLE_ENV, env, "Allocate DBC handle");
}
dberr = SQLSetConnectAttr(conn, SQL_LOGIN_TIMEOUT, (SQLPOINTER *)5, 0);
if (!SQL_SUCCEEDED(dberr)) {
throw ConnectionError(dberr, SQL_HANDLE_ENV, env, "Set connection attributes");
}
}
void
ODBC::Connection::connectPost()
{
RETCODE dberr = SQLSetConnectOption(conn, SQL_ATTR_AUTOCOMMIT, SQL_AUTOCOMMIT_ON);
if (!SQL_SUCCEEDED(dberr)) {
throw ConnectionError(dberr, SQL_HANDLE_DBC, conn, "Set default auto commit");
}
}
ODBC::Connection::Connection(const std::string & s) :
env(0),
conn(0),
txDepth(0),
txAborted(false)
{
connectPre();
RETCODE dberr = SQLDriverConnect(conn, NULL, (SQLCHAR*)s.c_str(), s.length(), NULL, 0, NULL, SQL_DRIVER_NOPROMPT);
if (!SQL_SUCCEEDED(dberr)) {
throw ConnectionError(dberr, SQL_HANDLE_DBC, conn, "Connect");
}
connectPost();
}
ODBC::Connection::~Connection()
{
if (conn) {
if (!SQL_SUCCEEDED(SQLDisconnect(conn))) {
syslog(LOG_WARNING, "%s: Disconnect error", __FUNCTION__);
}
if (!SQL_SUCCEEDED(SQLFreeHandle(SQL_HANDLE_DBC, conn))) {
syslog(LOG_WARNING, "%s: Free connection handle error", __FUNCTION__);
}
}
if (env) {
if (!SQL_SUCCEEDED(SQLFreeHandle(SQL_HANDLE_ENV, env))) {
syslog(LOG_WARNING, "%s: Free connection handle error", __FUNCTION__);
}
}
}
int
ODBC::Connection::beginTx() const
{
if (txDepth == 0) {
SQLRETURN dberr = SQLSetConnectOption(conn, SQL_ATTR_AUTOCOMMIT, SQL_AUTOCOMMIT_OFF);
if (!SQL_SUCCEEDED(dberr)) {
throw Error(dberr, SQL_HANDLE_DBC, conn, "Set default auto commit");
}
}
txDepth += 1;
return txDepth;
}
int
ODBC::Connection::commitTx() const
{
if (txDepth > 0) {
if (txAborted) {
return rollbackTx();
}
txDepth -= 1;
if (txDepth == 0) {
SQLRETURN dberr = SQLEndTran(SQL_HANDLE_DBC, conn, SQL_COMMIT);
if (!SQL_SUCCEEDED(dberr)) {
throw Error(dberr, SQL_HANDLE_DBC, conn, "SQLEndTran (SQL_COMMIT)");
}
dberr = SQLSetConnectOption(conn, SQL_ATTR_AUTOCOMMIT, SQL_AUTOCOMMIT_ON);
if (!SQL_SUCCEEDED(dberr)) {
throw Error(dberr, SQL_HANDLE_DBC, conn, "Enable auto commit");
}
txAborted = false;
}
return txDepth;
}
throw Error("Attempt to commit none existant transaction");
}
int
ODBC::Connection::rollbackTx() const
{
if (txDepth > 0) {
txDepth -= 1;
if (txDepth == 0) {
SQLRETURN dberr = SQLEndTran(SQL_HANDLE_DBC, conn, SQL_ROLLBACK);
if (!SQL_SUCCEEDED(dberr)) {
throw Error(dberr, SQL_HANDLE_DBC, conn, "SQLEndTran (SQL_ROLLBACK)");
}
dberr = SQLSetConnectOption(conn, SQL_ATTR_AUTOCOMMIT, SQL_AUTOCOMMIT_ON);
if (!SQL_SUCCEEDED(dberr)) {
throw Error(dberr, SQL_HANDLE_DBC, conn, "Enable auto commit");
}
txAborted = false;
}
return txDepth;
}
throw Error("Attempt to rollback none existant transaction");
}
void
ODBC::Connection::abortTx() const
{
txAborted = true;
}
bool
ODBC::Connection::txIsAborted() const
{
return txAborted;
}
bool
ODBC::Connection::inTx() const
{
return (txDepth > 0);
}
std::string
ODBC::Connection::getAttrStr(SQLINTEGER attr) const
{
std::string rtn;
rtn.resize(BUFSIZ);
SQLINTEGER size = 0;
SQLINTEGER dberr = SQLGetConnectAttr(conn, attr, (unsigned char *)rtn.c_str(), BUFSIZ, &size);
if (!SQL_SUCCEEDED(dberr)) {
throw ODBC::Error(dberr, SQL_HANDLE_DBC, conn, "%s", __FUNCTION__);
}
rtn.resize(size);
return rtn;
}
SQLINTEGER
ODBC::Connection::getAttrInt(SQLINTEGER attr) const
{
SQLINTEGER result;
SQLINTEGER dberr = SQLGetConnectAttr(conn, attr, &result, sizeof(result), 0);
if (!SQL_SUCCEEDED(dberr)) {
throw ODBC::Error(dberr, SQL_HANDLE_DBC, conn, "%s", __FUNCTION__);
}
return result;
}
ODBC::ConnectionError::ConnectionError(RETCODE err, SQLSMALLINT handletype, SQLHANDLE handle, char const * stage) :
ODBC::Error(err, handletype, handle, "%s", stage),
FailureTime(time(NULL))
{
}
ODBC::ConnectionError::ConnectionError(const ConnectionError & e) :
ODBC::Error(strdup(e.what())),
FailureTime(e.FailureTime)
{
}
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