[tracker/miner-fs-merge-updates] libtracker-miner: Merge several SPARQL updates while crawling
- From: Aleksander Morgado <aleksm src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [tracker/miner-fs-merge-updates] libtracker-miner: Merge several SPARQL updates while crawling
- Date: Tue, 28 Sep 2010 08:36:44 +0000 (UTC)
commit 5d907210e6a982f4ac4db2176b9be411fd528708
Author: Aleksander Morgado <aleksander lanedo com>
Date: Thu Sep 9 15:46:32 2010 +0200
libtracker-miner: Merge several SPARQL updates while crawling
src/libtracker-miner/tracker-miner-fs.c | 190 ++++++++++++++++++++++++-------
1 files changed, 148 insertions(+), 42 deletions(-)
---
diff --git a/src/libtracker-miner/tracker-miner-fs.c b/src/libtracker-miner/tracker-miner-fs.c
index e9c0fe2..e9e7e68 100644
--- a/src/libtracker-miner/tracker-miner-fs.c
+++ b/src/libtracker-miner/tracker-miner-fs.c
@@ -38,6 +38,11 @@
/* If defined will print contents of populated mtime cache while running */
#undef PRINT_MTIME_CACHE_CONTENTS
+/* Maximum number of items of the same directory to pile up in the SPARQL buffer */
+#define MAX_SPARQL_BUFFER_ITEMS 100
+/* Maximum time (seconds) before forcing a sparql buffer flush */
+#define MAX_SPARQL_BUFFER_TIME 15
+
/**
* SECTION:tracker-miner-fs
* @short_description: Abstract base class for filesystem miners
@@ -143,6 +148,12 @@ struct _TrackerMinerFSPrivate {
/* Files to check if no longer exist */
GHashTable *check_removed;
+ /* SPARQL buffer to pile up several UPDATEs */
+ GString *sparql_buffer;
+ guint sparql_buffer_n;
+ GFile *sparql_buffer_current_parent;
+ time_t sparql_buffer_start_time;
+
/* Status */
guint been_started : 1;
guint been_crawled : 1;
@@ -734,6 +745,14 @@ fs_finalize (GObject *object)
g_list_free (priv->config_directories);
}
+ if (priv->sparql_buffer_current_parent) {
+ g_object_unref (priv->sparql_buffer_current_parent);
+ }
+
+ if (priv->sparql_buffer) {
+ g_string_free (priv->sparql_buffer, TRUE);
+ }
+
g_queue_foreach (priv->crawled_directories, (GFunc) crawled_directory_data_free, NULL);
g_queue_free (priv->crawled_directories);
@@ -1059,6 +1078,10 @@ sparql_update_cb (GObject *object,
tracker_sparql_connection_update_finish (TRACKER_SPARQL_CONNECTION (object), result, &error);
+ /* If update was done when crawling finished, no data will be given */
+ if (!user_data)
+ return;
+
data = user_data;
fs = TRACKER_MINER_FS (data->miner);
priv = fs->private;
@@ -1509,12 +1532,47 @@ do_process_file (TrackerMinerFS *fs,
}
static void
+sparql_buffer_flush (TrackerMinerFS *fs,
+ ProcessData *data)
+{
+ TrackerMinerFSPrivate *priv;
+
+ priv = fs->private;
+
+ if (priv->sparql_buffer) {
+ g_debug ("(Sparql buffer) Flushing buffer with '%u' items", priv->sparql_buffer_n);
+ tracker_sparql_connection_update_async (tracker_miner_get_connection (TRACKER_MINER (fs)),
+ priv->sparql_buffer->str,
+ G_PRIORITY_DEFAULT,
+ NULL,
+ sparql_update_cb,
+ data);
+
+ /* Clear current parent */
+ if (priv->sparql_buffer_current_parent) {
+ g_object_unref (priv->sparql_buffer_current_parent);
+ priv->sparql_buffer_current_parent = NULL;
+ }
+ /* Clear buffer */
+ g_string_free (priv->sparql_buffer, TRUE);
+ priv->sparql_buffer = NULL;
+ priv->sparql_buffer_n = 0;
+ priv->sparql_buffer_start_time = 0;
+ } else {
+ g_debug ("(Sparql buffer) Nothing to flush");
+ }
+}
+
+static void
item_add_or_update_cb (TrackerMinerFS *fs,
ProcessData *data,
const GError *error)
{
+ TrackerMinerFSPrivate *priv;
gchar *uri;
+ GFile *parent;
+ priv = fs->private;
uri = g_file_get_uri (data->file);
if (error) {
@@ -1534,7 +1592,8 @@ item_add_or_update_cb (TrackerMinerFS *fs,
(error->code == DBUS_GERROR_NO_REPLY ||
error->code == DBUS_GERROR_TIMEOUT ||
error->code == DBUS_GERROR_TIMED_OUT)) {
- g_debug (" Got DBus timeout error on '%s', but it could not be caused by it. Retrying file.", uri);
+ g_debug (" Got DBus timeout error on '%s', but it could not "
+ "be caused by it. Retrying file.", uri);
/* Reset the TrackerSparqlBuilder */
g_object_unref (data->builder);
@@ -1551,50 +1610,85 @@ item_add_or_update_cb (TrackerMinerFS *fs,
item_queue_handlers_set_up (fs);
}
- } else {
- gchar *full_sparql;
-
- if (data->urn) {
- gboolean attribute_update_only;
-
- attribute_update_only = GPOINTER_TO_INT (g_object_steal_qdata (G_OBJECT (data->file),
- fs->private->quark_attribute_updated));
- g_debug ("Updating item '%s' with urn '%s'%s",
- uri,
- data->urn,
- attribute_update_only ? " (attributes only)" : "");
-
- if (!attribute_update_only) {
- /* update, delete all statements inserted by miner
- * except for rdf:type statements as they could cause implicit deletion of user data */
- full_sparql = g_strdup_printf ("DELETE { GRAPH <%s> { <%s> ?p ?o } } "
- "WHERE { GRAPH <%s> { <%s> ?p ?o FILTER (?p != rdf:type) } } %s",
- TRACKER_MINER_FS_GRAPH_URN,
- data->urn,
- TRACKER_MINER_FS_GRAPH_URN,
- data->urn,
- tracker_sparql_builder_get_result (data->builder));
- } else {
- /* Do not drop graph if only updating attributes, the SPARQL builder
- * will already contain the necessary DELETE statements for the properties
- * being updated */
- full_sparql = g_strdup (tracker_sparql_builder_get_result (data->builder));
- }
- } else {
- g_debug ("Creating new item '%s'", uri);
+ g_free (uri);
+ return;
+ }
- /* new file */
- full_sparql = g_strdup (tracker_sparql_builder_get_result (data->builder));
+ /* Get parent of this file we're updating/creating */
+ parent = g_file_get_parent (data->file);
+
+ /* Update count of items in buffer */
+ priv->sparql_buffer_n++;
+
+ /* Start buffer if it not already done */
+ if (!priv->sparql_buffer) {
+ priv->sparql_buffer = g_string_new ("");
+ priv->sparql_buffer_start_time = time (NULL);
+ }
+
+ /* Append new SPARQL to buffer */
+ if (data->urn) {
+ gboolean attribute_update_only;
+
+ attribute_update_only = GPOINTER_TO_INT (g_object_steal_qdata (G_OBJECT (data->file),
+ fs->private->quark_attribute_updated));
+ g_debug ("(Sparql buffer) Appending item update: '%s' with urn '%s'%s",
+ uri,
+ data->urn,
+ attribute_update_only ? " (attributes only)" : "");
+
+ if (!attribute_update_only) {
+ /* update, delete all statements inserted by miner
+ * except for rdf:type statements as they could cause implicit deletion of user data */
+ g_string_append_printf (priv->sparql_buffer,
+ "DELETE { GRAPH <%s> { <%s> ?p ?o } } "
+ "WHERE { GRAPH <%s> { <%s> ?p ?o FILTER (?p != rdf:type) } } %s",
+ TRACKER_MINER_FS_GRAPH_URN,
+ data->urn,
+ TRACKER_MINER_FS_GRAPH_URN,
+ data->urn,
+ tracker_sparql_builder_get_result (data->builder));
+ } else {
+ /* Do not drop graph if only updating attributes, the SPARQL builder
+ * will already contain the necessary DELETE statements for the properties
+ * being updated */
+ g_string_append_printf (priv->sparql_buffer,
+ tracker_sparql_builder_get_result (data->builder));
}
+ } else {
+ /* new file */
+ g_debug ("(Sparql buffer) Appending item creation: '%s'", uri);
+ g_string_append_printf (priv->sparql_buffer,
+ " %s",
+ tracker_sparql_builder_get_result (data->builder));
+ }
- tracker_sparql_connection_update_async (tracker_miner_get_connection (TRACKER_MINER (fs)),
- full_sparql,
- G_PRIORITY_DEFAULT,
- NULL,
- sparql_update_cb, data);
- g_free (full_sparql);
+ /* Set current parent if not set already */
+ if (!priv->sparql_buffer_current_parent && parent) {
+ priv->sparql_buffer_current_parent = g_object_ref (parent);
+ }
+
+ /* Flush buffer if:
+ * - Last item has no parent
+ * - Parent change was detected
+ * - MAX_SPARQL_BUFFER_ITEMS items reached
+ * - Not flushed in the last MAX_SPARQL_BUFFER_TIME seconds
+ */
+ if (!parent ||
+ !g_file_equal (parent, priv->sparql_buffer_current_parent) ||
+ priv->sparql_buffer_n >= MAX_SPARQL_BUFFER_ITEMS ||
+ (time (NULL) - priv->sparql_buffer_start_time > MAX_SPARQL_BUFFER_TIME)) {
+ /* Flush! */
+ sparql_buffer_flush (fs, data);
+ } else {
+ /* If we didn't do the flush after the append, remove from processing data */
+ fs->private->processing_pool = g_list_remove (fs->private->processing_pool, data);
+ process_data_free (data);
+ item_queue_handlers_set_up (fs);
}
+ if (parent)
+ g_object_unref (parent);
g_free (uri);
}
@@ -1699,6 +1793,9 @@ item_remove (TrackerMinerFS *fs,
return TRUE;
}
+ /* Before dumping the DELETE event, flush any possible CREATED/UPDATED event */
+ sparql_buffer_flush (fs, NULL);
+
tracker_thumbnailer_remove_add (uri, mime);
g_free (mime);
@@ -1731,7 +1828,8 @@ item_remove (TrackerMinerFS *fs,
sparql->str,
G_PRIORITY_DEFAULT,
NULL,
- sparql_update_cb, data);
+ sparql_update_cb,
+ data);
g_string_free (sparql, TRUE);
g_free (uri);
@@ -1984,6 +2082,9 @@ item_move (TrackerMinerFS *fs,
return retval;
}
+ /* Before dumping the MOVE event, flush any possible CREATED/UPDATED event */
+ sparql_buffer_flush (fs, NULL);
+
g_debug ("Moving item from '%s' to '%s'",
source_uri,
uri);
@@ -2047,7 +2148,8 @@ item_move (TrackerMinerFS *fs,
sparql->str,
G_PRIORITY_DEFAULT,
NULL,
- sparql_update_cb, data);
+ sparql_update_cb,
+ data);
g_free (uri);
g_free (source_uri);
@@ -2449,6 +2551,10 @@ item_queue_handlers_cb (gpointer user_data)
process_stop (fs);
}
+ /* Flush any possible pending update here */
+ g_debug ("(Sparql buffer) No more items in queue, flushing...");
+ sparql_buffer_flush (fs, NULL);
+
tracker_thumbnailer_send ();
/* No more files left to process */
keep_processing = FALSE;
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