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/*
* Copyright (C) 2009 - 2011 Vivien Malerba <malerba@gnome-db.org>
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <libgda/libgda.h>
#include <sql-parser/gda-sql-parser.h>
#include <string.h>
#include <unistd.h>
static GdaStatement *create_statement (const gchar *sql);
static void fetch_execute_result (GdaConnection *cnc, guint task_id);
static guint request_execution (GdaConnection *cnc, const gchar *sql);
static guint request_execution_with_params (GdaConnection *cnc, const gchar *sql, ...);
int
main (int argc, char** argv)
{
GdaConnection *cnc;
guint id1, id2, id3;
GError *error = NULL;
gda_init ();
/* REM: the GDA_CONNECTION_OPTIONS_THREAD_ISOLATED flag is necessary
* to make sure the connection is opened in a separate thread from the main thread in order
* for the asynchronous method to work. Failing to do so will generally (depending on the
* database provider's implementation) lead to asynchronous execution failure.
*/
cnc = gda_connection_open_from_dsn ("SalesTest", NULL, GDA_CONNECTION_OPTIONS_THREAD_ISOLATED, NULL);
if (!cnc) {
g_print ("Can't open connection: %s\n", error && error->message ? error->message : "No detail");
return 1;
}
/* execute */
id1 = request_execution (cnc, "SELECT * from customers");
id2 = request_execution (cnc, "SELECT * from products LIMIT 2");
id3 = request_execution_with_params (cnc, "SELECT * from customers WHERE id>=##theid::int", "theid", "6", NULL);
/* fetch result */
fetch_execute_result (cnc, id2);
fetch_execute_result (cnc, 10);
fetch_execute_result (cnc, id1);
fetch_execute_result (cnc, id2);
fetch_execute_result (cnc, id3);
/*gda_statement_get_parameters (stmt, ¶meters, NULL);*/
g_object_unref (cnc);
return 0;
}
static GdaStatement *
create_statement (const gchar *sql)
{
GdaSqlParser *parser;
GdaStatement *stmt;
parser = gda_sql_parser_new ();
stmt = gda_sql_parser_parse_string (parser, sql, NULL, NULL);
g_object_unref (parser);
return stmt;
}
static guint
request_execution (GdaConnection *cnc, const gchar *sql)
{
GdaStatement *stmt;
guint id;
GError *error = NULL;
g_print ("=========== Async. execution request:\n%s\n", sql);
stmt = create_statement (sql);
id = gda_connection_async_statement_execute (cnc, stmt, NULL, GDA_STATEMENT_MODEL_RANDOM_ACCESS, NULL, FALSE,
&error);
g_object_unref (stmt);
if (id == 0) {
g_print ("Can't execute ASYNC: %s\n", error && error->message ? error->message : "No detail");
exit (1);
}
g_print ("Assigned task id: %u\n", id);
return id;
}
/*
* ... is a list of (const gchar *name, const gchar *value) couples, terminated by %NULL
*/
static guint
request_execution_with_params (GdaConnection *cnc, const gchar *sql, ...)
{
GdaStatement *stmt;
guint id;
GError *error = NULL;
GdaSet *params;
const gchar *pname;
g_print ("=========== Async. exececution request:\n%s\n", sql);
stmt = create_statement (sql);
if (! gda_statement_get_parameters (stmt, ¶ms, &error)) {
g_print ("Can't get statement's parameters: %s\n", error && error->message ? error->message : "No detail");
exit (1);
}
if (params) {
va_list ap;
va_start (ap, sql);
for (pname = va_arg (ap, const gchar *); pname; pname = va_arg (ap, const gchar *)) {
const gchar *value;
GdaHolder *holder;
holder = gda_set_get_holder (params, pname);
value = va_arg (ap, const gchar *);
if (holder)
g_assert (gda_holder_set_value_str (holder, NULL, value, NULL));
g_print ("\t%s => %s\n", pname, value);
va_end (ap);
}
}
id = gda_connection_async_statement_execute (cnc, stmt, params, GDA_STATEMENT_MODEL_RANDOM_ACCESS, NULL, FALSE,
&error);
if (params)
g_object_unref (params);
g_object_unref (stmt);
if (id == 0) {
g_print ("Can't execute ASYNC: %s\n", error && error->message ? error->message : "No detail");
exit (1);
}
g_print ("Assigned task id: %u\n", id);
return id;
}
static void
fetch_execute_result (GdaConnection *cnc, guint task_id)
{
GObject *result;
GError *error = NULL;
gint i;
for (i = 0; i < 10; i++) {
g_print ("=========== Waiting for task %u\n", task_id);
result = gda_connection_async_fetch_result (cnc, task_id, NULL, &error);
if (result) {
if (GDA_IS_DATA_MODEL (result))
gda_data_model_dump (GDA_DATA_MODEL (result), NULL);
else
g_print ("Unknown result: %s\n", G_OBJECT_TYPE_NAME (result));
g_object_unref (result);
return;
}
else if (error) {
if (error && (error->domain == GDA_CONNECTION_ERROR) &&
(error->code == GDA_CONNECTION_TASK_NOT_FOUND_ERROR))
g_print ("Task not found error: %s\n", error->message);
else
g_print ("Execution failed: %s\n", error->message ? error->message : "No detail");
return;
}
else {
g_print ("Not yet executed...\n");
g_usleep (100000);
}
}
}
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