public function update()
{
if (!file_exists($this->file)) {
return array();
}
$this->name = Kwf_Util_Rrd_Field::escapeField($this->name);
$this->newName = Kwf_Util_Rrd_Field::escapeField($this->newName);
if (!$this->silent) {
echo "renaming rrd field: " . $this->name . "\n";
}
$xml = $this->_dump();
$found = false;
foreach ($xml->ds as $ds) {
if (trim($ds->name) == $this->name) {
$ds->name = $this->newName;
$found = true;
break;
}
}
if (!$found) {
throw new Kwf_ClientException("Field '{$this->name}' not found");
}
$this->_restore($xml);
return array();
}
public function update()
{
if (!file_exists($this->file)) {
return array();
}
$this->name = Kwf_Util_Rrd_Field::escapeField($this->name);
if (!$this->silent) {
echo "adding rrd field: " . $this->name . "\n";
}
$sXml = $this->_dump();
foreach ($sXml->rra as $rra) {
$ds = $rra->cdp_prep->addChild('ds');
$ds->primary_value = 'NaN';
$ds->secondary_value = 'NaN';
$ds->value = 'NaN';
$ds->unknown_datapoints = '0';
foreach ($rra->database->row as $r) {
$r->addChild('v', 'NaN');
}
}
$xml = dom_import_simplexml($sXml);
$doc = $xml->ownerDocument;
$ds = $doc->createElement('ds');
$ds = $xml->insertBefore($ds, $doc->getElementsByTagName('rra')->item(0));
$ds->appendChild($doc->createElement('name', $this->name));
$ds->appendChild($doc->createElement('type', $this->type));
$ds->appendChild($doc->createElement('minimal_heartbeat', $this->minimalHeartbeat));
$ds->appendChild($doc->createElement('min', $this->min));
$ds->appendChild($doc->createElement('max', $this->max));
$ds->appendChild($doc->createElement('last_ds', 'U'));
$ds->appendChild($doc->createElement('value', 'NaN'));
$ds->appendChild($doc->createElement('unknown_sec', 3));
$this->_restore(simplexml_import_dom($xml));
return array();
}
public function update()
{
if (!file_exists($this->file)) {
return array();
}
if (is_string($this->name)) {
$this->name = array($this->name);
}
foreach ($this->name as &$n) {
$n = Kwf_Util_Rrd_Field::escapeField($n);
}
if (!$this->silent) {
echo "dropping rrd fields: " . implode($this->name) . "\n";
}
$xml = $this->_dump();
$found = false;
$index = 0;
foreach ($xml->ds as $ds) {
if (in_array(trim($ds->name), $this->name)) {
$ds = dom_import_simplexml($ds);
$ds->parentNode->removeChild($ds);
$i = 0;
foreach ($xml->rra->cdp_prep->ds as $ds2) {
if ($i == $index) {
$ds2 = dom_import_simplexml($ds2);
$ds2->parentNode->removeChild($ds2);
break;
}
$i++;
}
foreach ($xml->rra->database->row as $row) {
$i = 0;
foreach ($row->v as $v) {
if ($i == $index) {
$v = dom_import_simplexml($v);
$v->parentNode->removeChild($v);
break;
}
$i++;
}
}
}
$index++;
}
$this->_restore($xml);
return array();
}
public function getAverageValues($fields, $start, $end)
{
if (!file_exists($this->_fileName)) {
$ret = array();
foreach ($fields as $f) {
$ret[$f] = 0;
}
}
$cmd = "rrdtool fetch {$this->_fileName} AVERAGE --start {$start} --end {$end} 2>&1";
exec($cmd, $rows);
foreach ($fields as $f) {
$sum[$f] = 0;
$cnt[$f] = 0;
}
foreach ($rows as $k => $r) {
preg_match_all('#[^ ]+#', $r, $m);
$r = $m[0];
if ($k == 0) {
$fileFields = $r;
} else {
if ($k == 1) {
//leerzeile
} else {
if (count($fileFields) + 1 != count($r)) {
throw new Kwf_Exception("invalid row?!");
}
$time = array_shift($r);
$time = (int) substr($time, 0, -1);
foreach ($fields as $f) {
$v = $r[array_search(Kwf_Util_Rrd_Field::escapeField($f), $fileFields)];
if (preg_match('#^([0-9]\\.[0-9]+)e([+-])([0-9]{2})$#', $v, $m)) {
$v = (double) $m[1] * ($m[2] == '-' ? -1 : 1) * pow(10, (int) $m[3]);
$sum[$f] += $v;
$cnt[$f]++;
}
}
}
}
}
$ret = array();
foreach ($fields as $f) {
if ($cnt[$f]) {
$ret[$f] = $sum[$f] / $cnt[$f];
} else {
$ret[$f] = 0;
}
}
return $ret;
}
