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gnc-backend-dbi.c
1808 lines (1552 loc) · 50.1 KB
/
gnc-backend-dbi.c
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/********************************************************************
* gnc-backend-dbi.c: load and save data to SQL via libdbi *
* *
* This program 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 2 of *
* the License, or (at your option) any later version. *
* *
* This program 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 this program; if not, contact: *
* *
* Free Software Foundation Voice: +1-617-542-5942 *
* 51 Franklin Street, Fifth Floor Fax: +1-617-542-2652 *
* Boston, MA 02110-1301, USA gnu@gnu.org *
\********************************************************************/
/** @file gnc-backend-dbi.c
* @brief load and save data to SQL
* @author Copyright (c) 2006-2008 Phil Longstaff <plongstaff@rogers.com>
*
* This file implements the top-level QofBackend API for saving/
* restoring data to/from an SQL db using libdbi
*/
#include "config.h"
#include <errno.h>
#include <glib.h>
#include <glib/gi18n.h>
#include <glib/gstdio.h>
#if !HAVE_GMTIME_R
#include "gmtime_r.h"
#endif
#include <dbi/dbi.h>
#include "gnc-backend-sql.h"
#include "qof.h"
#include "qofquery-p.h"
#include "qofquerycore-p.h"
#include "Account.h"
#include "TransLog.h"
#include "gnc-engine.h"
#include "SX-book.h"
#include "Recurrence.h"
#include "gnc-gconf-utils.h"
#include "gnc-backend-dbi.h"
#ifdef S_SPLINT_S
#include "splint-defs.h"
#endif
#define TRANSACTION_NAME "trans"
static QofLogModule log_module = G_LOG_DOMAIN;
#define FILE_URI_TYPE "file"
#define FILE_URI_PREFIX (FILE_URI_TYPE "://")
#define SQLITE3_URI_TYPE "sqlite3"
#define SQLITE3_URI_PREFIX (SQLITE3_URI_TYPE "://")
#define PGSQL_DEFAULT_PORT 5432
typedef gchar* (*CREATE_TABLE_DDL_FN)( GncSqlConnection* conn,
const gchar* table_name,
const GList* col_info_list );
typedef GSList* (*GET_TABLE_LIST_FN)( dbi_conn conn, const gchar* dbname );
typedef struct {
CREATE_TABLE_DDL_FN create_table_ddl;
GET_TABLE_LIST_FN get_table_list;
} provider_functions_t;
static /*@ null @*/ gchar* conn_create_table_ddl_sqlite3( GncSqlConnection* conn,
const gchar* table_name,
const GList* col_info_list );
static GSList* conn_get_table_list( dbi_conn conn, const gchar* dbname );
static provider_functions_t provider_sqlite3 =
{
conn_create_table_ddl_sqlite3,
conn_get_table_list
};
#define SQLITE3_TIMESPEC_STR_FORMAT "%04d%02d%02d%02d%02d%02d"
static /*@ null @*/ gchar* conn_create_table_ddl_mysql( GncSqlConnection* conn,
const gchar* table_name,
const GList* col_info_list );
static provider_functions_t provider_mysql =
{
conn_create_table_ddl_mysql,
conn_get_table_list
};
#define MYSQL_TIMESPEC_STR_FORMAT "%04d%02d%02d%02d%02d%02d"
static /*@ null @*/ gchar* conn_create_table_ddl_pgsql( GncSqlConnection* conn,
const gchar* table_name,
const GList* col_info_list );
static GSList* conn_get_table_list_pgsql( dbi_conn conn, const gchar* dbname );
static provider_functions_t provider_pgsql =
{
conn_create_table_ddl_pgsql,
conn_get_table_list_pgsql
};
#define PGSQL_TIMESPEC_STR_FORMAT "%04d%02d%02d %02d%02d%02d"
static /*@ null @*/ gchar* create_index_ddl( GncSqlConnection* conn,
const gchar* index_name,
const gchar* table_name,
const GncSqlColumnTableEntry* col_table );
static GncSqlConnection* create_dbi_connection( /*@ observer @*/ provider_functions_t* provider, /*@ observer @*/ QofBackend* qbe, /*@ observer @*/ dbi_conn conn );
#define GNC_DBI_PROVIDER_SQLITE (&provider_sqlite3)
#define GNC_DBI_PROVIDER_MYSQL (&provider_mysql)
#define GNC_DBI_PROVIDER_PGSQL (&provider_pgsql)
struct GncDbiBackend_struct
{
GncSqlBackend sql_be;
dbi_conn conn;
/*@ dependent @*/ QofBook *primary_book; /* The primary, main open book */
gboolean loading; /* We are performing an initial load */
gboolean in_query;
gboolean supports_transactions;
gboolean is_pristine_db; // Are we saving to a new pristine db?
gboolean exists; // Does the database exist?
gint obj_total; // Total # of objects (for percentage calculation)
gint operations_done; // Number of operations (save/load) done
// GHashTable* versions; // Version number for each table
};
typedef struct GncDbiBackend_struct GncDbiBackend;
typedef struct
{
GncSqlConnection base;
/*@ observer @*/ QofBackend* qbe;
/*@ observer @*/ dbi_conn conn;
/*@ observer @*/ provider_functions_t* provider;
} GncDbiSqlConnection;
/* ================================================================= */
static void
create_tables_cb( const gchar* type, gpointer data_p, gpointer be_p )
{
GncSqlObjectBackend* pData = data_p;
GncDbiBackend* be = be_p;
g_return_if_fail( type != NULL && data_p != NULL && be_p != NULL );
g_return_if_fail( pData->version == GNC_SQL_BACKEND_VERSION );
if( pData->create_tables != NULL ) {
(pData->create_tables)( &be->sql_be );
}
}
static void
sqlite3_error_fn( dbi_conn conn, /*@ unused @*/ void* user_data )
{
//GncDbiBackend *be = (GncDbiBackend*)user_data;
const gchar* msg;
(void)dbi_conn_error( conn, &msg );
PERR( "DBI error: %s\n", msg );
}
static void
gnc_dbi_sqlite3_session_begin( QofBackend *qbe, QofSession *session,
const gchar *book_id,
/*@ unused @*/ gboolean ignore_lock,
gboolean create_if_nonexistent )
{
GncDbiBackend *be = (GncDbiBackend*)qbe;
gint result;
gchar* dirname;
gchar* basename;
g_return_if_fail( qbe != NULL );
g_return_if_fail( session != NULL );
g_return_if_fail( book_id != NULL );
ENTER (" ");
/* Remove uri type if present */
if( g_str_has_prefix( book_id, FILE_URI_PREFIX ) ) {
book_id += strlen( FILE_URI_PREFIX );
}
if( g_str_has_prefix( book_id, SQLITE3_URI_PREFIX ) ) {
book_id += strlen( SQLITE3_URI_PREFIX );
}
if( !create_if_nonexistent
&& !g_file_test( book_id, G_FILE_TEST_IS_REGULAR | G_FILE_TEST_EXISTS ) ) {
qof_backend_set_error( qbe, ERR_FILEIO_FILE_NOT_FOUND );
LEAVE(" ");
return;
}
if( be->conn != NULL ) {
dbi_conn_close( be->conn );
}
be->conn = dbi_conn_new( "sqlite3" );
if( be->conn == NULL ) {
PERR( "Unable to create sqlite3 dbi connection\n" );
qof_backend_set_error( qbe, ERR_BACKEND_BAD_URL );
LEAVE( " " );
return;
}
dirname = g_path_get_dirname( book_id );
basename = g_path_get_basename( book_id );
dbi_conn_error_handler( be->conn, sqlite3_error_fn, be );
result = dbi_conn_set_option( be->conn, "host", "localhost" );
if( result < 0 ) {
PERR( "Error setting 'host' option\n" );
qof_backend_set_error( qbe, ERR_BACKEND_SERVER_ERR );
LEAVE( " " );
return;
}
result = dbi_conn_set_option( be->conn, "dbname", basename );
if( result < 0 ) {
PERR( "Error setting 'dbname' option\n" );
qof_backend_set_error( qbe, ERR_BACKEND_SERVER_ERR );
LEAVE( " " );
return;
}
result = dbi_conn_set_option( be->conn, "sqlite3_dbdir", dirname );
if( result < 0 ) {
PERR( "Error setting 'sqlite3_dbdir' option\n" );
qof_backend_set_error( qbe, ERR_BACKEND_SERVER_ERR );
LEAVE( " " );
return;
}
result = dbi_conn_connect( be->conn );
g_free( basename );
g_free( dirname );
if( result < 0 ) {
PERR( "Unable to connect to %s: %d\n", book_id, result );
qof_backend_set_error( qbe, ERR_BACKEND_BAD_URL );
LEAVE( " " );
return;
}
if( be->sql_be.conn != NULL ) {
gnc_sql_connection_dispose( be->sql_be.conn );
}
be->sql_be.conn = create_dbi_connection( GNC_DBI_PROVIDER_SQLITE, qbe, be->conn );
be->sql_be.timespec_format = SQLITE3_TIMESPEC_STR_FORMAT;
LEAVE (" ");
}
static void
mysql_error_fn( dbi_conn conn, void* user_data )
{
GncDbiBackend *be = (GncDbiBackend*)user_data;
const gchar* msg;
(void)dbi_conn_error( conn, &msg );
if( g_str_has_prefix( msg, "1049: Unknown database" ) ) {
PINFO( "DBI error: %s\n", msg );
be->exists = FALSE;
} else {
PERR( "DBI error: %s\n", msg );
}
}
/**
* Sets standard db options in a dbi_conn.
*
* @param qbe QOF backend
* @param conn dbi_conn connection
* @param host Hostname
* @param port Port number
* @param dbname Database name
* @param username User name
* @param password Password
* @return TRUE if successful, FALSE if error
*/
static gboolean
set_standard_connection_options( QofBackend* qbe, dbi_conn conn, const gchar* host, int port,
const gchar* dbname, const gchar* username, const gchar* password )
{
gint result;
result = dbi_conn_set_option( conn, "host", host );
if( result < 0 ) {
PERR( "Error setting 'host' option\n" );
qof_backend_set_error( qbe, ERR_BACKEND_SERVER_ERR );
return FALSE;
}
result = dbi_conn_set_option_numeric( conn, "port", port );
if( result < 0 ) {
PERR( "Error setting 'port' option\n" );
qof_backend_set_error( qbe, ERR_BACKEND_SERVER_ERR );
return FALSE;
}
result = dbi_conn_set_option( conn, "dbname", dbname );
if( result < 0 ) {
PERR( "Error setting 'dbname' option\n" );
qof_backend_set_error( qbe, ERR_BACKEND_SERVER_ERR );
return FALSE;
}
result = dbi_conn_set_option( conn, "username", username );
if( result < 0 ) {
PERR( "Error setting 'username' option\n" );
qof_backend_set_error( qbe, ERR_BACKEND_SERVER_ERR );
return FALSE;
}
result = dbi_conn_set_option( conn, "password", password );
if( result < 0 ) {
PERR( "Error setting 'password' option\n" );
qof_backend_set_error( qbe, ERR_BACKEND_SERVER_ERR );
return FALSE;
}
return TRUE;
}
static void
gnc_dbi_mysql_session_begin( QofBackend* qbe, QofSession *session,
const gchar *book_id,
/*@ unused @*/gboolean ignore_lock,
gboolean create_if_nonexistent )
{
GncDbiBackend *be = (GncDbiBackend*)qbe;
gchar* dsn = NULL;
gchar* host;
gchar* port = NULL;
gchar* dbname;
gchar* username;
gchar* password;
gint portnum;
gint result;
gboolean success = FALSE;
g_return_if_fail( qbe != NULL );
g_return_if_fail( session != NULL );
g_return_if_fail( book_id != NULL );
ENTER (" ");
/* Split the book-id (format host:dbname:username:password or
host:port:dbname:username:password) */
dsn = g_strdup( book_id );
for( host = dsn; *host != '/'; host++ ) {}
host += 2;
for( dbname = host; *dbname != ':'; dbname++ ) {}
*dbname++ = '\0';
if( *dbname >= '0' && *dbname <= '9' ) {
port = dbname;
for( ; *dbname != ':'; dbname++ ) {}
*dbname++ = '\0';
}
for( username = dbname; *username != ':'; username++ ) {}
*username++ = '\0';
for( password = username; *password != ':'; password++ ) {}
*password++ = '\0';
if( port != NULL && *port != '\0' ) {
portnum = atoi( port );
} else {
portnum = 0;
}
// Try to connect to the db. If it doesn't exist and the create_if_nonexistent
// flag is TRUE, we'll need to connect to the 'mysql' db and execute the
// CREATE DATABASE ddl statement there.
if( be->conn != NULL ) {
dbi_conn_close( be->conn );
}
be->conn = dbi_conn_new( "mysql" );
if( be->conn == NULL ) {
PERR( "Unable to create mysql dbi connection\n" );
qof_backend_set_error( qbe, ERR_BACKEND_BAD_URL );
goto exit;
}
dbi_conn_error_handler( be->conn, mysql_error_fn, be );
if( !set_standard_connection_options( qbe, be->conn, host, portnum, dbname, username, password ) ) {
goto exit;
}
be->exists = TRUE;
result = dbi_conn_connect( be->conn );
if( result == 0 ) {
success = TRUE;
} else {
if( be->exists ) {
PERR( "Unable to connect to database '%s'\n", dbname );
qof_backend_set_error( qbe, ERR_BACKEND_SERVER_ERR );
goto exit;
}
// The db does not already exist. Connect to the 'mysql' db and try to create it.
if( create_if_nonexistent ) {
dbi_result dresult;
result = dbi_conn_set_option( be->conn, "dbname", "mysql" );
if( result < 0 ) {
PERR( "Error setting 'dbname' option\n" );
qof_backend_set_error( qbe, ERR_BACKEND_SERVER_ERR );
goto exit;
}
result = dbi_conn_connect( be->conn );
if( result < 0 ) {
PERR( "Unable to connect to 'mysql' database\n" );
qof_backend_set_error( qbe, ERR_BACKEND_SERVER_ERR );
goto exit;
}
dresult = dbi_conn_queryf( be->conn, "CREATE DATABASE %s CHARACTER SET utf8", dbname );
if( dresult == NULL ) {
PERR( "Unable to create database '%s'\n", dbname );
qof_backend_set_error( qbe, ERR_BACKEND_SERVER_ERR );
goto exit;
}
dbi_conn_close( be->conn );
// Try again to connect to the db
be->conn = dbi_conn_new( "mysql" );
if( be->conn == NULL ) {
PERR( "Unable to create mysql dbi connection\n" );
qof_backend_set_error( qbe, ERR_BACKEND_BAD_URL );
goto exit;
}
dbi_conn_error_handler( be->conn, mysql_error_fn, be );
if( !set_standard_connection_options( qbe, be->conn, host, 0, dbname, username, password ) ) {
goto exit;
}
result = dbi_conn_connect( be->conn );
if( result < 0 ) {
PERR( "Unable to create database '%s'\n", dbname );
qof_backend_set_error( qbe, ERR_BACKEND_SERVER_ERR );
goto exit;
}
success = TRUE;
} else {
qof_backend_set_error( qbe, ERR_BACKEND_NO_SUCH_DB );
}
}
if( success ) {
if( be->sql_be.conn != NULL ) {
gnc_sql_connection_dispose( be->sql_be.conn );
}
be->sql_be.conn = create_dbi_connection( GNC_DBI_PROVIDER_MYSQL, qbe, be->conn );
}
be->sql_be.timespec_format = MYSQL_TIMESPEC_STR_FORMAT;
exit:
if( dsn != NULL ) {
g_free( dsn );
}
LEAVE (" ");
}
static void
pgsql_error_fn( dbi_conn conn, void* user_data )
{
GncDbiBackend *be = (GncDbiBackend*)user_data;
const gchar* msg;
(void)dbi_conn_error( conn, &msg );
if( g_str_has_prefix( msg, "FATAL: database" ) &&
g_str_has_suffix( msg, "does not exist\n" ) ) {
PINFO( "DBI error: %s\n", msg );
be->exists = FALSE;
} else {
PERR( "DBI error: %s\n", msg );
}
}
static void
gnc_dbi_postgres_session_begin( QofBackend *qbe, QofSession *session,
const gchar *book_id,
/*@ unused @*/ gboolean ignore_lock,
gboolean create_if_nonexistent )
{
GncDbiBackend *be = (GncDbiBackend*)qbe;
gint result;
gchar* dsn;
gchar* host;
gchar* port = NULL;
gchar* dbname;
gchar* username;
gchar* password;
gboolean success = FALSE;
gint portnum;
g_return_if_fail( qbe != NULL );
g_return_if_fail( session != NULL );
g_return_if_fail( book_id != NULL );
ENTER (" ");
/* Split the book-id (format host:dbname:username:password or
host:port:dbname:username:password) */
dsn = g_strdup( book_id );
for( host = dsn; *host != '/'; host++ ) {}
host += 2;
for( dbname = host; *dbname != ':'; dbname++ ) {}
*dbname++ = '\0';
if( *dbname >= '0' && *dbname <= '9' ) {
port = dbname;
for( ; *dbname != ':'; dbname++ ) {}
*dbname++ = '\0';
}
for( username = dbname; *username != ':'; username++ ) {}
*username++ = '\0';
for( password = username; *password != ':'; password++ ) {}
*password++ = '\0';
if( port != NULL && *port != '\0' ) {
portnum = atoi( port );
} else {
portnum = PGSQL_DEFAULT_PORT;
}
// Try to connect to the db. If it doesn't exist and the create_if_nonexistent
// flag is TRUE, we'll need to connect to the 'postgres' db and execute the
// CREATE DATABASE ddl statement there.
if( be->conn != NULL ) {
dbi_conn_close( be->conn );
}
be->conn = dbi_conn_new( "pgsql" );
if( be->conn == NULL ) {
PERR( "Unable to create pgsql dbi connection\n" );
qof_backend_set_error( qbe, ERR_BACKEND_BAD_URL );
goto exit;
}
dbi_conn_error_handler( be->conn, pgsql_error_fn, be );
if( !set_standard_connection_options( qbe, be->conn, host, portnum, dbname, username, password ) ) {
goto exit;
}
be->exists = TRUE;
result = dbi_conn_connect( be->conn );
if( result == 0 ) {
success = TRUE;
} else {
if( be->exists ) {
PERR( "Unable to connect to database '%s'\n", dbname );
qof_backend_set_error( qbe, ERR_BACKEND_SERVER_ERR );
goto exit;
}
// The db does not already exist. Connect to the 'postgres' db and try to create it.
if( create_if_nonexistent ) {
dbi_result dresult;
result = dbi_conn_set_option( be->conn, "dbname", "postgres" );
if( result < 0 ) {
PERR( "Error setting 'dbname' option\n" );
qof_backend_set_error( qbe, ERR_BACKEND_SERVER_ERR );
goto exit;
}
result = dbi_conn_connect( be->conn );
if( result < 0 ) {
PERR( "Unable to connect to 'postgres' database\n" );
qof_backend_set_error( qbe, ERR_BACKEND_SERVER_ERR );
goto exit;
}
dresult = dbi_conn_queryf( be->conn, "CREATE DATABASE %s WITH ENCODING 'UTF8'", dbname );
if( dresult == NULL ) {
PERR( "Unable to create database '%s'\n", dbname );
qof_backend_set_error( qbe, ERR_BACKEND_SERVER_ERR );
goto exit;
}
dbi_conn_close( be->conn );
// Try again to connect to the db
be->conn = dbi_conn_new( "pgsql" );
if( be->conn == NULL ) {
PERR( "Unable to create pgsql dbi connection\n" );
qof_backend_set_error( qbe, ERR_BACKEND_BAD_URL );
goto exit;
}
dbi_conn_error_handler( be->conn, pgsql_error_fn, be );
if( !set_standard_connection_options( qbe, be->conn, host, PGSQL_DEFAULT_PORT, dbname, username, password ) ) {
goto exit;
}
result = dbi_conn_connect( be->conn );
if( result < 0 ) {
PERR( "Unable to create database '%s'\n", dbname );
qof_backend_set_error( qbe, ERR_BACKEND_SERVER_ERR );
goto exit;
}
success = TRUE;
} else {
qof_backend_set_error( qbe, ERR_BACKEND_NO_SUCH_DB );
}
}
if( success ) {
if( be->sql_be.conn != NULL ) {
gnc_sql_connection_dispose( be->sql_be.conn );
}
be->sql_be.conn = create_dbi_connection( GNC_DBI_PROVIDER_PGSQL, qbe, be->conn );
}
be->sql_be.timespec_format = PGSQL_TIMESPEC_STR_FORMAT;
exit:
if( dsn != NULL ) {
g_free( dsn );
}
LEAVE (" ");
}
/* ================================================================= */
static void
gnc_dbi_session_end( QofBackend *be_start )
{
GncDbiBackend *be = (GncDbiBackend*)be_start;
g_return_if_fail( be_start != NULL );
ENTER (" ");
if( be->conn != NULL ) {
dbi_conn_close( be->conn );
be->conn = NULL;
}
if( be->sql_be.conn != NULL ) {
gnc_sql_connection_dispose( be->sql_be.conn );
be->sql_be.conn = NULL;
}
gnc_sql_finalize_version_info( &be->sql_be );
LEAVE (" ");
}
static void
gnc_dbi_destroy_backend( /*@ only @*/ QofBackend *be )
{
g_return_if_fail( be != NULL );
qof_backend_destroy( be );
g_free( be );
}
/* ================================================================= */
static void
gnc_dbi_load( QofBackend* qbe, /*@ dependent @*/ QofBook *book, QofBackendLoadType loadType )
{
GncDbiBackend *be = (GncDbiBackend*)qbe;
g_return_if_fail( qbe != NULL );
g_return_if_fail( book != NULL );
ENTER( "be=%p, book=%p", be, book );
if( loadType == LOAD_TYPE_INITIAL_LOAD ) {
g_assert( be->primary_book == NULL );
be->primary_book = book;
// Set up table version information
gnc_sql_init_version_info( &be->sql_be );
// Call all object backends to create any required tables
qof_object_foreach_backend( GNC_SQL_BACKEND, create_tables_cb, be );
}
gnc_sql_load( &be->sql_be, book, loadType );
LEAVE( "" );
}
/* ================================================================= */
static gboolean
gnc_dbi_save_may_clobber_data( QofBackend* qbe )
{
GncDbiBackend* be = (GncDbiBackend*)qbe;
const gchar* dbname;
GSList* table_name_list;
gint numTables = 0;
gint status;
/* Data may be clobbered iff the number of tables != 0 */
dbname = dbi_conn_get_option( be->conn, "dbname" );
table_name_list = ((GncDbiSqlConnection*)(be->sql_be.conn))->provider->get_table_list( be->conn, dbname );
if( table_name_list != NULL ) {
GSList* node;
numTables = g_slist_length( table_name_list );
for( node = table_name_list; node != NULL; node = node->next ) {
g_free( node->data );
}
g_slist_free( table_name_list );
}
return (numTables != 0);
}
static void
gnc_dbi_sync_all( QofBackend* qbe, /*@ dependent @*/ QofBook *book )
{
GncDbiBackend* be = (GncDbiBackend*)qbe;
GSList* table_name_list;
const gchar* dbname;
gint status;
g_return_if_fail( be != NULL );
g_return_if_fail( book != NULL );
ENTER( "book=%p, primary=%p", book, be->primary_book );
/* Destroy the current contents of the database */
dbname = dbi_conn_get_option( be->conn, "dbname" );
table_name_list = ((GncDbiSqlConnection*)(be->sql_be.conn))->provider->get_table_list( be->conn, dbname );
if( table_name_list != NULL ) {
GSList* node;
for( node = table_name_list; node != NULL; node = node->next ) {
const gchar* table_name = (const gchar*)node->data;
dbi_result result;
result = dbi_conn_queryf( be->conn, "DROP TABLE %s", table_name );
if( result != NULL ) {
status = dbi_result_free( result );
if( status < 0 ) {
PERR( "Error in dbi_result_free() result\n" );
qof_backend_set_error( qbe, ERR_BACKEND_SERVER_ERR );
}
}
g_free( node->data );
}
g_slist_free( table_name_list );
}
/* Save all contents */
be->is_pristine_db = TRUE;
be->primary_book = book;
gnc_sql_sync_all( &be->sql_be, book );
LEAVE( "book=%p", book );
}
/* ================================================================= */
static void
gnc_dbi_begin_edit( QofBackend *qbe, QofInstance *inst )
{
GncDbiBackend* be = (GncDbiBackend*)qbe;
g_return_if_fail( be != NULL );
g_return_if_fail( inst != NULL );
gnc_sql_begin_edit( &be->sql_be, inst );
}
static void
gnc_dbi_rollback_edit( QofBackend *qbe, QofInstance *inst )
{
GncDbiBackend* be = (GncDbiBackend*)qbe;
g_return_if_fail( be != NULL );
g_return_if_fail( inst != NULL );
gnc_sql_rollback_edit( &be->sql_be, inst );
}
static void
gnc_dbi_commit_edit( QofBackend *qbe, QofInstance *inst )
{
GncDbiBackend* be = (GncDbiBackend*)qbe;
g_return_if_fail( be != NULL );
g_return_if_fail( inst != NULL );
gnc_sql_commit_edit( &be->sql_be, inst );
}
/* ================================================================= */
static void
init_sql_backend( GncDbiBackend* dbi_be )
{
QofBackend* be;
be = (QofBackend*)dbi_be;
be->session_end = gnc_dbi_session_end;
be->destroy_backend = gnc_dbi_destroy_backend;
be->load = gnc_dbi_load;
be->save_may_clobber_data = gnc_dbi_save_may_clobber_data;
/* The gda backend treats accounting periods transactionally. */
be->begin = gnc_dbi_begin_edit;
be->commit = gnc_dbi_commit_edit;
be->rollback = gnc_dbi_rollback_edit;
be->counter = NULL;
/* The gda backend will not be multi-user (for now)... */
be->events_pending = NULL;
be->process_events = NULL;
be->sync = gnc_dbi_sync_all;
be->load_config = NULL;
be->get_config = NULL;
be->compile_query = gnc_sql_compile_query;
be->run_query = gnc_sql_run_query;
be->free_query = gnc_sql_free_query;
be->export = NULL;
gnc_sql_init( &dbi_be->sql_be );
}
static QofBackend*
new_backend( void (*session_begin)( QofBackend *, QofSession *, const gchar *,
/*@ unused @*/ gboolean, /*@ unused @*/ gboolean ) )
{
GncDbiBackend *dbi_be;
QofBackend *be;
dbi_be = g_new0( GncDbiBackend, 1 );
g_assert( dbi_be != NULL );
be = (QofBackend*)dbi_be;
qof_backend_init( be );
be->session_begin = session_begin;
init_sql_backend( dbi_be );
return be;
}
static QofBackend*
gnc_dbi_backend_sqlite3_new( void )
{
return new_backend( gnc_dbi_sqlite3_session_begin );
}
static QofBackend*
gnc_dbi_backend_mysql_new( void )
{
return new_backend( gnc_dbi_mysql_session_begin );
}
static QofBackend*
gnc_dbi_backend_postgres_new( void )
{
return new_backend( gnc_dbi_postgres_session_begin );
}
static void
gnc_dbi_provider_free( /*@ only @*/ QofBackendProvider *prov )
{
g_return_if_fail( prov != NULL );
g_free( prov );
}
/*
* Checks to see whether the file is an sqlite file or not
*
*/
static gboolean
gnc_dbi_check_sqlite3_file( const gchar *path )
{
FILE* f;
gchar buf[50];
size_t chars_read;
gint status;
// BAD if the path is null
g_return_val_if_fail( path != NULL, FALSE );
f = g_fopen( path, "r" );
// OK if the file doesn't exist - new file
if( f == NULL ) {
PINFO( "doesn't exist (errno=%d) -> DBI", errno );
return TRUE;
}
// OK if file has the correct header
chars_read = fread( buf, sizeof(buf), 1, f );
status = fclose( f );
if( status < 0 ) {
PERR( "Error in fclose(): %d\n", errno );
}
if( g_str_has_prefix( buf, "SQLite format 3" ) ) {
PINFO( "has SQLite format string -> DBI" );
return TRUE;
}
PINFO( "exists, does not have SQLite format string -> not DBI" );
// Otherwise, BAD
return FALSE;
}
G_MODULE_EXPORT void
qof_backend_module_init( void )
{
QofBackendProvider *prov;
#define DEFAULT_DBD_DIR "/usr/lib/dbd"
const gchar* driver_dir;
int num_drivers;
gboolean have_sqlite3_driver = FALSE;
gboolean have_mysql_driver = FALSE;
gboolean have_pgsql_driver = FALSE;
/* Initialize libdbi and see which drivers are available. Only register qof backends which
have drivers available. */
driver_dir = g_getenv( "GNC_DBD_DIR" );
if( driver_dir == NULL ) {
PWARN( "GNC_DBD_DIR not set: using %s\n", DEFAULT_DBD_DIR );
driver_dir = DEFAULT_DBD_DIR;
}
num_drivers = dbi_initialize( driver_dir );
if( num_drivers == 0 ) {
PWARN( "No DBD drivers found\n" );
} else {
dbi_driver driver = NULL;
PINFO( "%d DBD drivers found\n", num_drivers );
do {
driver = dbi_driver_list( driver );
if( driver != NULL ) {
const gchar* name = dbi_driver_get_name( driver );
PINFO( "Driver: %s\n", name );
if( strcmp( name, "sqlite3" ) == 0 ) {
have_sqlite3_driver = TRUE;
} else if( strcmp( name, "mysql" ) == 0 ) {
have_mysql_driver = TRUE;
} else if( strcmp( name, "pgsql" ) == 0 ) {
have_pgsql_driver = TRUE;
}
}
} while( driver != NULL );
}
if( have_sqlite3_driver ) {
prov = g_new0( QofBackendProvider, 1 );
g_assert( prov != NULL );
prov->provider_name = "GnuCash Libdbi (SQLITE3) Backend";
prov->access_method = FILE_URI_TYPE;
prov->partial_book_supported = FALSE;
prov->backend_new = gnc_dbi_backend_sqlite3_new;
prov->provider_free = gnc_dbi_provider_free;
prov->check_data_type = gnc_dbi_check_sqlite3_file;
qof_backend_register_provider( prov );
prov = g_new0( QofBackendProvider, 1 );
g_assert( prov != NULL );
prov->provider_name = "GnuCash Libdbi (SQLITE3) Backend";
prov->access_method = SQLITE3_URI_TYPE;
prov->partial_book_supported = FALSE;
prov->backend_new = gnc_dbi_backend_sqlite3_new;
prov->provider_free = gnc_dbi_provider_free;
prov->check_data_type = gnc_dbi_check_sqlite3_file;
qof_backend_register_provider( prov );
}
if( have_mysql_driver ) {
prov = g_new0( QofBackendProvider, 1 );
g_assert( prov != NULL );
prov->provider_name = "GnuCash Libdbi (MYSQL) Backend";
prov->access_method = "mysql";
prov->partial_book_supported = FALSE;
prov->backend_new = gnc_dbi_backend_mysql_new;
prov->provider_free = gnc_dbi_provider_free;
prov->check_data_type = NULL;
qof_backend_register_provider( prov );
}
if( have_pgsql_driver ) {
prov = g_new0( QofBackendProvider, 1 );
g_assert( prov != NULL );
prov->provider_name = "GnuCash Libdbi (POSTGRESQL) Backend";
prov->access_method = "postgres";
prov->partial_book_supported = FALSE;
prov->backend_new = gnc_dbi_backend_postgres_new;
prov->provider_free = gnc_dbi_provider_free;
prov->check_data_type = NULL;
qof_backend_register_provider( prov );
}
/* For now, set log level to DEBUG so that SQl statements will be put into
the gnucash.trace file. */
qof_log_set_level( log_module, QOF_LOG_DEBUG );
}