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/******************************************************************************
* File : PostGISRasterDriver.cpp
* Project: PostGIS Raster driver
* Purpose: Implements PostGIS Raster driver class methods
* Author: Jorge Arevalo, jorge.arevalo@deimos-space.com
*
* Last changes: $Id: $
*
******************************************************************************
* Copyright (c) 2010, Jorge Arevalo, jorge.arevalo@deimos-space.com
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
******************************************************************************/
#include "postgisraster.h"
#include "cpl_string.h"
/************************
* \brief Constructor
************************/
PostGISRasterDriver::PostGISRasterDriver() {
papoConnection = NULL;
nRefCount = 0;
}
/************************
* \brief Destructor
************************/
PostGISRasterDriver::~PostGISRasterDriver() {
int i = 0;
for (i = 0; i < nRefCount; i++) {
/*
* Segmentation fault here. Tested CPLFree and delete. Same result
*/
if (papoConnection[i]) {
PQfinish(papoConnection[i]);
}
}
if (papoConnection)
CPLFree(papoConnection);
}
/***************************************************************************
* \brief Create a PQconn object and store it in a list
*
* The PostGIS Raster driver keeps the connection with the PostgreSQL database
* server for as long it leaves. Following PostGISRasterDataset instance
* can re-use the existing connection as long it used the same database,
* same user name, same password and same port.
*
* The PostGIS Raster driver will keep a list of all the successful
* connections so, when connection is requested and it does not exist
* on the list a new one will be instantiated, added to the list and
* returned to the caller.
*
* All connection will be destroyed when the PostGISRasterDriver is destroyed.
*
***************************************************************************/
PGconn* PostGISRasterDriver::GetConnection(const char* pszConnectionString,
const char * pszHostIn, const char * pszPortIn, const char * pszUserIn,
const char * pszPasswordIn) {
int i = 0;
PGconn * poConn = NULL;
/**
* Look for an existing connection in the list
**/
for (i = 0; i < nRefCount; i++) {
CPLDebug("PostGIS_Raster", "PostGISRasterDriver::GetConnection(): "
"User: %s\nPassword: %s\nHost: %s\nPort: %s", pszUserIn,
pszPasswordIn, pszHostIn, pszPortIn);
if (EQUAL(pszUserIn, PQuser(papoConnection[i])) &&
EQUAL(pszPasswordIn, PQpass(papoConnection[i])) &&
EQUAL(pszHostIn, PQhost(papoConnection[i])) &&
EQUAL(pszPortIn, PQport(papoConnection[i]))) {
return papoConnection[i];
}
}
/**
* There's no existing connection. Create a new one.
**/
poConn = PQconnectdb(pszConnectionString);
if (poConn == NULL ||
PQstatus(poConn) == CONNECTION_BAD) {
CPLError(CE_Failure, CPLE_AppDefined, "PGconnectcb failed: %s\n",
PQerrorMessage(poConn));
PQfinish(poConn);
return NULL;
}
/**
* Save connection in connection list.
**/
nRefCount++;
papoConnection = (PGconn**) CPLRealloc(papoConnection,
sizeof (PGconn*) * nRefCount);
if (NULL != papoConnection) {
papoConnection[nRefCount - 1] = poConn;
return poConn;
}
else {
CPLError(CE_Failure, CPLE_AppDefined, "Reallocation for new connection\
failed.\n");
PQfinish(poConn);
return NULL;
}
}
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