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/*
* This file is part of rasdaman community.
*
* Rasdaman community is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Rasdaman community is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with rasdaman community. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Peter Baumann /
rasdaman GmbH.
*
* For more information please see <http://www.rasdaman.org>
* or contact Peter Baumann via <baumann@rasdaman.com>.
*/
/*************************************************************
*
*
* PURPOSE:
* The interface used by the file storage modules.
*
*
* COMMENTS:
*
************************************************************/
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include "raslib/rminit.hh"
#include "../reladminif/oidif.hh"
#include "simplefilestorage.hh"
#include "debug-srv.hh"
using namespace std;
SimpleFileStorage::~SimpleFileStorage()
{
}
SimpleFileStorage::SimpleFileStorage(const string& path) throw (r_Error) : root_path(path)
{
// Check if the path exist is readable/writable etc.
struct stat status;
if (stat(path.c_str(), &status)<0 || !S_ISDIR(status.st_mode)) {
throw 1; // Root directory not found
}
TALK("SimpleFileStorage initialized on root path" << path);
}
void SimpleFileStorage::insert(const char* data, r_Bytes size, int BlobId) throw (r_Error)
{
ENTER("SimpleFileStorage::insert with BlobID="<<BlobId);
vector<string> path;
getPath(BlobId, &path);
string file_path = path[0]; // Root path
// Iterate trough the levels and create all directories needed.
for (int i = 1; i < path.size() - 1; ++i)
{
file_path += '/' + path[i];
struct stat status;
if (!stat(file_path.c_str(), &status))
if (!mkdir(file_path.c_str(), 0770))
throw 2; // Cannot create directory
}
file_path += '/' + path[path.size() - 1];
int fd = open(file_path.c_str(), O_CREAT | O_WRONLY, 0770);
if (fd < 0)
throw 3; // Cannot create file
int offset = 0;
// Send the data to the disk
while (offset < size) {
int count = write(fd, data + offset, size - offset);
if (count == -1)
throw 4; // Error while writing data to the disk
offset += count;
}
if (close(fd)<0)
throw 4; // Error while writing data to the disk
LEAVE("SimpleFileStorage::insert");
}
void SimpleFileStorage::update(const char* data, r_Bytes size, int BlobId) throw (r_Error)
{
ENTER("SimpleFileStorage::update");
vector<string> path;
getPath(BlobId, &path);
string file_path = path[0]; // Root path
// Iterate trough the levels and create all directories needed.
for (int i = 1; i < path.size() - 1; ++i)
{
file_path += '/' + path[i];
struct stat status;
if (!stat(file_path.c_str(), &status))
if (!mkdir(file_path.c_str(), 0770))
throw 2; // Cannot create directory
}
file_path += '/' + path[path.size() - 1];
int fd = open(file_path.c_str(), O_WRONLY | O_CREAT | O_TRUNC);
if (fd < 0)
throw 6; // Cannot open file
int offset = 0;
// Send the data to the disk
while (offset < size) {
int count = write(fd, data + offset, size - offset);
if (count == -1)
throw 4; // Error while writing data to the disk
offset += count;
}
if (close(fd)<0)
throw 4; // Error while writing data to the disk
LEAVE("SimpleFileStorage::update");
}
void SimpleFileStorage::retrieve(int BlobId, char** data, r_Bytes* size) throw (r_Error)
{
ENTER("SimpleFileStorage::read");
string path;
getPath(BlobId, &path);
struct stat status;
if (stat(path.c_str(), &status) < 0)
throw 5; // File does not exist, the blob does not exist.
*size = status.st_size;
*data = (char*)malloc(status.st_size);
int fd = open(path.c_str(), O_RDONLY);
if (fd < 0)
throw 6; // Cannot open file
int offset = 0;
// Send the data to the disk
while (offset < *size) {
int count = read(fd, *data + offset, *size - offset);
if (count == -1)
throw 7; // Error while reading data from the disk
offset += count;
}
if (close(fd) < 0)
throw 7; // Error while reading data from the disk
LEAVE("SimpleFileStorage::read");
}
void SimpleFileStorage::remove(int BlobId) throw (r_Error)
{
ENTER("SimpleFileStorage::remove");
string path;
getPath(BlobId, &path);
if (unlink(path.c_str()) < 0)
throw 8; // Error while removing the file
LEAVE("SimpleFileStorage::remove");
}
void SimpleFileStorage::getPath(int BlobId, vector<string> *path) {
ENTER("SimpleFileStorage::getPath");
path->clear();
path->push_back(root_path);
stringstream aux;
aux << BlobId;
path->push_back(aux.str());
LEAVE("SimpleFileStorage::getPath");
}
void SimpleFileStorage::getPath(int BlobId, string *path) {
vector<string> segments;
getPath(BlobId, &segments);
*path = segments[0];
for (int i = 1; i < segments.size(); ++i)
*path += '/' + segments[i];
}
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