/
session.cpp
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/
session.cpp
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//
// Copyright (C) 2011-2013 Denis Chapligin
// Copyright (C) 2004-2006 Maciej Sobczak, Stephen Hutton
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
#define SOCI_DB2_SOURCE
#include "soci-db2.h"
#ifdef _MSC_VER
#pragma warning(disable:4355)
#endif
using namespace soci;
using namespace soci::details;
const std::string db2_soci_error::sqlState(std::string const & msg,const SQLSMALLINT htype,const SQLHANDLE hndl) {
std::ostringstream ss(msg, std::ostringstream::app);
SQLCHAR message[SQL_MAX_MESSAGE_LENGTH + 1];
SQLCHAR sqlstate[SQL_SQLSTATE_SIZE + 1];
SQLINTEGER sqlcode;
SQLSMALLINT length;
if ( SQLGetDiagRec(htype,
hndl,
1,
sqlstate,
&sqlcode,
message,
SQL_MAX_MESSAGE_LENGTH + 1,
&length) == SQL_SUCCESS ) {
ss<<" SQLMESSAGE: ";
ss<<message;
}
return ss.str();
}
void db2_session_backend::parseKeyVal(std::string const & keyVal) {
size_t delimiter=keyVal.find_first_of("=");
std::string key=keyVal.substr(0,delimiter);
std::string value=keyVal.substr(delimiter+1,keyVal.length());
if (!key.compare("DSN")) {
this->dsn=value;
}
if (!key.compare("Uid")) {
this->username=value;
}
if (!key.compare("Pwd")) {
this->password=value;
}
this->autocommit=true; //Default value
if (!key.compare("autocommit")) {
if (!value.compare("off")) {
this->autocommit=false;
}
}
}
void db2_session_backend::parseConnectString(std::string const & connectString) {
std::string processingString(connectString);
size_t delimiter=processingString.find_first_of(";");
while(delimiter!=std::string::npos) {
std::string keyVal=processingString.substr(0,delimiter);
parseKeyVal(keyVal);
processingString=processingString.erase(0,delimiter+1);
delimiter=processingString.find_first_of(";");
}
if (!processingString.empty()) {
parseKeyVal(processingString);
}
}
db2_session_backend::db2_session_backend(
std::string const & connectString /* DSN=SAMPLE;Uid=db2inst1;Pwd=db2inst1;AutoCommit=off */) :
in_transaction(false)
{
parseConnectString(connectString);
SQLRETURN cliRC = SQL_SUCCESS;
/* Prepare handles */
cliRC = SQLAllocHandle(SQL_HANDLE_ENV,SQL_NULL_HANDLE,&hEnv);
if (cliRC != SQL_SUCCESS) {
throw db2_soci_error("Error while allocating the enironment handle",cliRC);
}
cliRC = SQLAllocHandle(SQL_HANDLE_DBC, hEnv, &hDbc);
if (cliRC != SQL_SUCCESS) {
std::string msg=db2_soci_error::sqlState("Error while allocating the connection handle",SQL_HANDLE_ENV,hEnv);
SQLFreeHandle(SQL_HANDLE_ENV,hEnv);
throw db2_soci_error(msg,cliRC);
}
/* Set autocommit */
if(this->autocommit) {
cliRC = SQLSetConnectAttr(hDbc,SQL_ATTR_AUTOCOMMIT, (SQLPOINTER)SQL_AUTOCOMMIT_ON, SQL_NTS);
} else {
cliRC = SQLSetConnectAttr(hDbc,SQL_ATTR_AUTOCOMMIT, (SQLPOINTER)SQL_AUTOCOMMIT_OFF, SQL_NTS);
}
if (cliRC != SQL_SUCCESS) {
std::string msg=db2_soci_error::sqlState("Error while setting autocommit attribute",SQL_HANDLE_DBC,hDbc);
SQLFreeHandle(SQL_HANDLE_DBC,hDbc);
SQLFreeHandle(SQL_HANDLE_ENV,hEnv);
throw db2_soci_error(msg,cliRC);
}
/* Connect to database */
cliRC = SQLConnect(hDbc, const_cast<SQLCHAR *>((const SQLCHAR *) dsn.c_str()), SQL_NTS,
const_cast<SQLCHAR *>((const SQLCHAR *) username.c_str()), SQL_NTS,
const_cast<SQLCHAR *>((const SQLCHAR *) password.c_str()), SQL_NTS);
if (cliRC != SQL_SUCCESS) {
std::string msg=db2_soci_error::sqlState("Error connecting to database",SQL_HANDLE_DBC,hDbc);
SQLFreeHandle(SQL_HANDLE_DBC,hDbc);
SQLFreeHandle(SQL_HANDLE_ENV,hEnv);
throw db2_soci_error(msg,cliRC);
}
}
db2_session_backend::~db2_session_backend()
{
clean_up();
}
void db2_session_backend::begin()
{
// In DB2, transations begin implicitly; however, autocommit must be disabled for the duration of the transaction
if(autocommit)
{
SQLRETURN cliRC = SQLSetConnectAttr(hDbc, SQL_ATTR_AUTOCOMMIT, (SQLPOINTER) SQL_AUTOCOMMIT_OFF, SQL_NTS);
if (cliRC != SQL_SUCCESS && cliRC != SQL_SUCCESS_WITH_INFO)
{
std::string msg=db2_soci_error::sqlState("Clearing the autocommit attribute failed", SQL_HANDLE_DBC, hDbc);
SQLFreeHandle(SQL_HANDLE_DBC,hDbc);
SQLFreeHandle(SQL_HANDLE_ENV,hEnv);
throw db2_soci_error(msg,cliRC);
}
}
in_transaction = true;
}
void db2_session_backend::commit()
{
if (!autocommit || in_transaction) {
in_transaction = false;
SQLRETURN cliRC = SQLEndTran(SQL_HANDLE_DBC,hDbc,SQL_COMMIT);
if(autocommit)
{
SQLRETURN cliRC2 = SQLSetConnectAttr(hDbc, SQL_ATTR_AUTOCOMMIT, (SQLPOINTER) SQL_AUTOCOMMIT_ON, SQL_NTS);
if ((cliRC == SQL_SUCCESS || cliRC == SQL_SUCCESS_WITH_INFO) &&
cliRC2 != SQL_SUCCESS && cliRC2 != SQL_SUCCESS_WITH_INFO)
{
std::string msg=db2_soci_error::sqlState("Setting the autocommit attribute failed", SQL_HANDLE_DBC, hDbc);
SQLFreeHandle(SQL_HANDLE_DBC,hDbc);
SQLFreeHandle(SQL_HANDLE_ENV,hEnv);
throw db2_soci_error(msg,cliRC);
}
}
if (cliRC != SQL_SUCCESS && cliRC != SQL_SUCCESS_WITH_INFO) {
throw db2_soci_error("Commit failed",cliRC);
}
}
}
void db2_session_backend::rollback()
{
if (!autocommit || in_transaction) {
in_transaction = false;
SQLRETURN cliRC = SQLEndTran(SQL_HANDLE_DBC,hDbc,SQL_ROLLBACK);
if(autocommit)
{
SQLRETURN cliRC2 = SQLSetConnectAttr(hDbc, SQL_ATTR_AUTOCOMMIT, (SQLPOINTER) SQL_AUTOCOMMIT_ON, SQL_NTS);
if ((cliRC == SQL_SUCCESS || cliRC == SQL_SUCCESS_WITH_INFO) &&
cliRC2 != SQL_SUCCESS && cliRC2 != SQL_SUCCESS_WITH_INFO)
{
std::string msg=db2_soci_error::sqlState("Setting the autocommit attribute failed", SQL_HANDLE_DBC, hDbc);
SQLFreeHandle(SQL_HANDLE_DBC,hDbc);
SQLFreeHandle(SQL_HANDLE_ENV,hEnv);
throw db2_soci_error(msg,cliRC);
}
}
if (cliRC != SQL_SUCCESS && cliRC != SQL_SUCCESS_WITH_INFO) {
throw db2_soci_error("Rollback failed",cliRC);
}
}
}
void db2_session_backend::clean_up()
{
// if a transaction is in progress, it will automatically be rolled back upon when the connection is disconnected/freed
in_transaction = false;
SQLDisconnect(hDbc);
SQLFreeHandle(SQL_HANDLE_DBC,hDbc);
SQLFreeHandle(SQL_HANDLE_ENV,hEnv);
}
db2_statement_backend * db2_session_backend::make_statement_backend()
{
return new db2_statement_backend(*this);
}
db2_rowid_backend * db2_session_backend::make_rowid_backend()
{
return new db2_rowid_backend(*this);
}
db2_blob_backend * db2_session_backend::make_blob_backend()
{
return new db2_blob_backend(*this);
}