function create($filename, $schema_id)
{
$cmd = array();
if (pathinfo($filename, PATHINFO_DIRNAME) === '.') {
$filename = $this->cfg->paths->db . DIRECTORY_SEPARATOR . $filename;
}
$schema = array_pop($this->cfg->xpath("schemas/schema[@id='{$schema_id}']"));
$archive = array_pop($this->cfg->xpath("archives/archive[@id='{$schema->attributes()->archive}']"));
$cmd[] = "create {$filename}";
if (!empty($schema->attributes()->step)) {
$cmd[] = '--step ' . $schema->attributes()->step;
}
// set DS
static $ds_defaults = array('type' => 'COUNTER', 'heartbeat' => '300', 'min' => 'U', 'max' => 'U');
foreach ($schema as $data_sources) {
foreach ($data_sources as $ds) {
$rec = array();
foreach ($ds_defaults as $k => $v) {
$rec[$k] = !empty($ds->attributes()->{$k}) ? (string) $ds->attributes()->{$k} : $v;
}
$cmd[] = 'DS:' . ds_encode($ds->attributes()->id) . ':' . join(':', $rec);
}
}
// set RRA
foreach ($archive as $rra) {
$cmd[] = 'RRA:' . $rra->attributes()->cf . ':' . $rra->attributes()->xff . ':' . $rra->attributes()->steps . ':' . $rra->attributes()->rows;
}
// execute the command
return $this->exec(join(' ', $cmd));
}
function build_defs($xml)
{
static $var_prefix = 'var';
$var_index = 0;
foreach ($xml->var as $rec) {
$row = array();
$var = (string) $rec->attributes()->id;
$sy = new ShuntingYard((string) $rec);
$token = $sy->first();
while ($token !== FALSE) {
if ($token->type === T_DEF) {
$var_key = $token->value;
if (isset($this->vars[$var_key])) {
$row[] = $this->vars[$var_key];
} elseif ($tmp = preg_split('/:/', $var_key) and array_shift($tmp) === 'rrd') {
if (!in_array(strtoupper(end($tmp)), array('AVERAGE', 'MIN', 'MAX', 'LAST'))) {
$cf = 'AVERAGE';
} else {
$cf = strtoupper(array_pop($tmp));
}
$ds = ds_encode(array_pop($tmp));
$filename = absolute_path($this->cfg->rrd->paths->db . DIRECTORY_SEPARATOR . join('.', $tmp) . '.rrd', @$this->opts['base_path']['db']);
$var_value = "{$filename}:{$ds}:{$cf}";
$var_name = $var_prefix . $var_index;
$var_index++;
$this->vars[$var_key] = $var_name;
$this->cmd[] = "DEF:{$var_name}={$var_value}";
$row[] = $var_name;
} else {
die("Undefined variable `{$var_key}`\n");
}
} elseif ($token->type === T_UNARY_MINUS) {
// multiply by minus one in order to reverse the sign
$row[] = -1;
$row[] = '*';
} elseif ($token->type === T_UNARY_PLUS) {
// simple skip it
} else {
$row[] = $token->value;
}
$token = $sy->next();
}
$var_key = $var;
if (isset($this->vars[$var_key])) {
die("Duplicate variable definition for`{$var}`");
} elseif (count($row) === 1 and strpos($row[0], $var_prefix) === 0) {
// simple variable, duplicate key
$this->vars[$var_key] = $row[0];
} else {
$var_name = $var_prefix . $var_index;
$var_index++;
$this->vars[$var_key] = $var_name;
$cdef = 'CDEF:' . $var_name . '=' . join(',', $row);
$this->cmd[] = $cdef;
}
}
}
