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Optimize cache synchronization by using extended SQL inserts (#798)

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This commit is contained in:
Thomas Bruederli 2012-05-26 15:15:17 +02:00
parent fab0c00194
commit 27a4061c99
1 changed files with 56 additions and 3 deletions
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59
plugins/libkolab/lib/kolab_storage_cache.php
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@ -35,7 +35,7 @@ class kolab_storage_cache
private $synched = false;
private $synclock = false;
private $ready = false;
private $max_sql_packet = 1046576; // 1 MB - 2000 bytes
private $binary_cols = array('photo','pgppublickey','pkcs7publickey');
@ -116,8 +116,12 @@ class kolab_storage_cache
}
// fetch new objects from imap
$fetch_index = array_diff($this->index, $old_index);
$this->_fetch($fetch_index, '*');
foreach (array_diff($this->index, $old_index) as $msguid) {
if ($object = $this->folder->read_object($msguid, '*')) {
$this->_extended_insert($msguid, $object);
}
}
$this->_extended_insert(0, null);
// delete invalid entries from local DB
$del_index = array_diff($old_index, $this->index);
@ -498,6 +502,55 @@ class kolab_storage_cache
return $object;
}
/**
* Write records into cache using extended inserts to reduce the number of queries to be executed
*
* @param int Message UID. Set 0 to commit buffered inserts
* @param array Kolab object to cache
*/
private function _extended_insert($msguid, $object)
{
static $buffer = '';
$line = '';
if ($object) {
$sql_data = $this->_serialize($object);
$objtype = $object['_type'] ? $object['_type'] : $this->folder->type;
$values = array(
$this->db->quote($this->resource_uri),
$this->db->quote($objtype),
$this->db->quote($msguid),
$this->db->quote($object['uid']),
$this->db->quote($sql_data['data']),
$this->db->quote($sql_data['xml']),
$this->db->quote($sql_data['dtstart']),
$this->db->quote($sql_data['dtend']),
$this->db->quote($sql_data['tags']),
$this->db->quote($sql_data['words']),
);
$line = '(' . join(',', $values) . ')';
}
if ($buffer && (!$msguid || (strlen($buffer) + strlen($line) > $this->max_sql_packet))) {
$result = $this->db->query(
"INSERT INTO kolab_cache ".
" (resource, type, msguid, uid, data, xml, dtstart, dtend, tags, words)".
" VALUES $buffer"
);
if (!$this->db->affected_rows($result)) {
rcmail::raise_error(array(
'code' => 900, 'type' => 'php',
'message' => "Failed to write to kolab cache"
), true);
}
$buffer = '';
}
$buffer .= ($buffer ? ',' : '') . $line;
}
/**
* Check lock record for this folder and wait if locked or set lock
*/