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/*
* Copyright (C) 2010, Codeminded BVBA <abustany@gnome.org>
* Copyright (C) 2011, Nokia <ivan.frade@nokia.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
[DBus (name = "org.freedesktop.Tracker1.Steroids")]
public class Tracker.Steroids : Object {
public const string PATH = "/org/freedesktop/Tracker1/Steroids";
public const int BUFFER_SIZE = 65536;
public async string[] query (BusName sender, string query, UnixOutputStream output_stream) throws Error {
var request = DBusRequest.begin (sender, "Steroids.Query");
request.debug ("query: %s", query);
try {
string[] variable_names = null;
var data_manager = Tracker.Main.get_data_manager ();
yield Tracker.Store.sparql_query (data_manager, query, Tracker.Store.Priority.HIGH, cursor => {
var data_output_stream = new DataOutputStream (new BufferedOutputStream.sized (output_stream, BUFFER_SIZE));
data_output_stream.set_byte_order (DataStreamByteOrder.HOST_ENDIAN);
int n_columns = cursor.n_columns;
int[] column_sizes = new int[n_columns];
int[] column_offsets = new int[n_columns];
string[] column_data = new string[n_columns];
variable_names = new string[n_columns];
for (int i = 0; i < n_columns; i++) {
variable_names[i] = cursor.get_variable_name (i);
}
while (cursor.next ()) {
int last_offset = -1;
for (int i = 0; i < n_columns ; i++) {
unowned string str = cursor.get_string (i);
column_sizes[i] = str != null ? str.length : 0;
column_data[i] = str;
last_offset += column_sizes[i] + 1;
column_offsets[i] = last_offset;
}
data_output_stream.put_int32 (n_columns);
for (int i = 0; i < n_columns ; i++) {
/* Cast from enum to int */
data_output_stream.put_int32 ((int) cursor.get_value_type (i));
}
for (int i = 0; i < n_columns ; i++) {
data_output_stream.put_int32 (column_offsets[i]);
}
for (int i = 0; i < n_columns ; i++) {
data_output_stream.put_string (column_data[i] != null ? column_data[i] : "");
data_output_stream.put_byte (0);
}
}
}, sender);
request.end ();
return variable_names;
} catch (Error e) {
request.end (e);
if (e is Sparql.Error) {
throw e;
} else {
throw new Sparql.Error.INTERNAL (e.message);
}
}
}
async Variant? update_internal (BusName sender, Tracker.Store.Priority priority, bool blank, UnixInputStream input_stream) throws Error {
var request = DBusRequest.begin (sender,
"Steroids.%sUpdate%s",
priority != Tracker.Store.Priority.HIGH ? "Batch" : "",
blank ? "Blank" : "");
try {
size_t bytes_read;
var data_input_stream = new DataInputStream (input_stream);
data_input_stream.set_buffer_size (BUFFER_SIZE);
data_input_stream.set_byte_order (DataStreamByteOrder.HOST_ENDIAN);
int query_size = data_input_stream.read_int32 (null);
/* We malloc one more char to ensure string is 0 terminated */
uint8[] query = new uint8[query_size + 1];
data_input_stream.read_all (query[0:query_size], out bytes_read);
data_input_stream = null;
request.debug ("query: %s", (string) query);
var data_manager = Tracker.Main.get_data_manager ();
if (!blank) {
yield Tracker.Store.sparql_update (data_manager, (string) query, priority, sender);
request.end ();
return null;
} else {
var variant = yield Tracker.Store.sparql_update_blank (data_manager, (string) query, priority, sender);
request.end ();
return variant;
}
} catch (DBInterfaceError.NO_SPACE ie) {
throw new Sparql.Error.NO_SPACE (ie.message);
} catch (Error e) {
request.end (e);
if (e is Sparql.Error) {
throw e;
} else {
throw new Sparql.Error.INTERNAL (e.message);
}
}
}
public async void update (BusName sender, UnixInputStream input_stream) throws Error {
yield update_internal (sender, Tracker.Store.Priority.HIGH, false, input_stream);
}
public async void batch_update (BusName sender, UnixInputStream input_stream) throws Error {
yield update_internal (sender, Tracker.Store.Priority.LOW, false, input_stream);
}
[DBus (signature = "aaa{ss}")]
public async Variant update_blank (BusName sender, UnixInputStream input_stream) throws Error {
return yield update_internal (sender, Tracker.Store.Priority.HIGH, true, input_stream);
}
[DBus (signature = "aaa{ss}")]
public async Variant batch_update_blank (BusName sender, UnixInputStream input_stream) throws Error {
return yield update_internal (sender, Tracker.Store.Priority.LOW, true, input_stream);
}
[DBus (signature = "as")]
public async Variant update_array (BusName sender, UnixInputStream input_stream) throws Error {
var request = DBusRequest.begin (sender, "Steroids.UpdateArray");
try {
var data_input_stream = new DataInputStream (input_stream);
data_input_stream.set_buffer_size (BUFFER_SIZE);
data_input_stream.set_byte_order (DataStreamByteOrder.HOST_ENDIAN);
int query_count = data_input_stream.read_int32 ();
var combined_query = new StringBuilder ();
string[] query_array = new string[query_count];
int i;
for (i = 0; i < query_count; i++) {
size_t bytes_read;
int query_size = data_input_stream.read_int32 ();
/* We malloc one more char to ensure string is 0 terminated */
query_array[i] = (string) new uint8[query_size + 1];
data_input_stream.read_all (((uint8[]) query_array[i])[0:query_size], out bytes_read);
request.debug ("query: %s", query_array[i]);
combined_query.append (query_array[i]);
}
data_input_stream = null;
var builder = new VariantBuilder ((VariantType) "as");
var data_manager = Tracker.Main.get_data_manager ();
// first try combined query for best possible performance
try {
yield Tracker.Store.sparql_update (data_manager, combined_query.str, Tracker.Store.Priority.LOW, sender);
// combined query was successful
for (i = 0; i < query_count; i++) {
builder.add ("s", "");
builder.add ("s", "");
}
request.end ();
return builder.end ();
} catch {
// combined query was not successful
combined_query = null;
}
// combined query was not successful, try queries one by one
for (i = 0; i < query_count; i++) {
request.debug ("query: %s", query_array[i]);
try {
yield Tracker.Store.sparql_update (data_manager, query_array[i], Tracker.Store.Priority.LOW, sender);
builder.add ("s", "");
builder.add ("s", "");
} catch (Error e1) {
builder.add ("s", "org.freedesktop.Tracker1.SparqlError.Internal");
builder.add ("s", e1.message);
}
}
request.end ();
return builder.end ();
} catch (Error e) {
request.end (e);
if (e is Sparql.Error) {
throw e;
} else {
throw new Sparql.Error.INTERNAL (e.message);
}
}
}
}
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