/**
* Constructor compatible with cascade resource factory.
*/
public function __construct($options, $context, $alias)
{
parent::__construct($options, $context, $alias);
// Use, wrap or create database connection
if (isset($options['flupdo'])) {
$this->flupdo = $options['flupdo'];
if (!($this->flupdo instanceof Flupdo || $this->flupdo instanceof FlupdoProxy)) {
throw new InvalidArgumentException('The "flupdo" option must contain an instance of Flupdo class.');
}
} else {
$driver_options = @$options['driver_options'];
if ($driver_options === null) {
$driver_options = array(self::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES \'UTF8\'; SET time_zone = \'' . date_default_timezone_get() . '\';');
}
$this->flupdo = new Flupdo($options['dsn'], @$options['username'], @$options['password'], $driver_options);
}
// Machine type table
if (isset($options['machine_types'])) {
$this->machine_type_table = $options['machine_types'];
}
}
/**
* Perform self-check.
*/
public static function performSelfCheck(\Smalldb\StateMachine\AbstractBackend $smalldb)
{
return $smalldb->performSelfCheck();
}
/**
* Constructor compatible with cascade resource factory.
*/
public function __construct($options, $context = null, $alias)
{
parent::__construct($options, $context, $alias);
// Get base dir (constants are available)
$this->base_dir = rtrim(Utils::filename_format($options['base_dir'], array()), '/') . '/';
// Load machine definitions from APC cache
if (!empty($options['cache_disabled'])) {
$cache_loaded = false;
$cache_mtime = 0;
$cache_disabled = true;
} else {
$cache_disabled = false;
$cache_key = __CLASS__ . ':' . $alias . ':' . $this->base_dir;
$cache_data = apc_fetch($cache_key, $cache_loaded);
if ($cache_loaded) {
list($this->machine_type_table, $cache_mtime) = $cache_data;
//debug_dump($this->machine_type_table, 'Cached @ '.strftime('%F %T', $cache_mtime));
}
}
// Scan base dir for machines and find youngest file
$dh = opendir($this->base_dir);
if (!$dh) {
throw new RuntimeException('Cannot open base dir: ' . $this->base_dir);
}
$youngest_mtime = filemtime(__FILE__);
// Make sure cache gets regenerated when this file is changed
$file_list = array();
while (($file = readdir($dh)) !== false) {
if ($file[0] != '.') {
$file_list[] = $file;
}
$mtime = filemtime($this->base_dir . $file);
if ($youngest_mtime < $mtime) {
$youngest_mtime = $mtime;
}
}
closedir($dh);
// Load data if cache is obsolete
if (!$cache_loaded || $youngest_mtime >= $cache_mtime) {
//debug_msg('Machine type table cache miss. Reloading...');
$this->machine_type_table = array();
// Find all machine types
foreach ($file_list as $file) {
@(list($machine_type, $ext) = explode('.', $file, 2));
switch ($ext) {
case 'json':
case 'json.php':
$filename = $this->base_dir . $file;
$this->machine_type_table[$machine_type] = JsonReader::loadString(file_get_contents($filename), [], $filename);
break;
}
}
ksort($this->machine_type_table);
// Load all included files
foreach ($this->machine_type_table as $machine_type => $json_config) {
$graphml_reader_used = false;
$bpmn_reader_used = false;
$machine_def =& $this->machine_type_table[$machine_type];
foreach ((array) @$json_config['include'] as $include) {
// String is filename
if (!is_array($include)) {
$include_file = $include;
$include_opts = array();
} else {
$include_file = $include['file'];
$include_opts = $include;
}
// Relative path is relative to base directory
if ($include_file[0] != '/') {
$include_file = $this->base_dir . $include_file;
}
// Detect file type and use proper loader
// FIXME: Replace this with extendible loading infrastructure.
if (preg_match('/\\.json\\(\\.php\\)\\?$/i', $include_file)) {
// Include JSON file (simple merge)
$machine_def = array_replace_recursive(JsonReader::loadString(file_get_contents($include_file), $include_opts, $include_file), $machine_def);
} else {
if (preg_match('/\\.graphml$/i', $include_file)) {
// Include GraphML file (find states and transitions, then simply add them to the definition)
$machine_def = array_replace_recursive(GraphMLReader::loadString(file_get_contents($include_file), $include_opts, $include_file), $machine_def);
$graphml_reader_used = true;
} else {
if (preg_match('/\\.bpmn$/i', $include_file)) {
// Load relevant fragment of BPMN diagram, it will be merged with other fragments and added to the definition later.
$machine_def = array_replace_recursive(BpmnReader::loadString(file_get_contents($include_file), $include_opts, $include_file), $machine_def);
$bpmn_reader_used = true;
} else {
throw new RuntimeException('Unknown file format: ' . $include_file);
}
}
}
}
if ($graphml_reader_used) {
GraphMLReader::postprocessDefinition($machine_def);
}
if ($bpmn_reader_used) {
BpmnReader::postprocessDefinition($machine_def);
}
JsonReader::postprocessDefinition($machine_def);
unset($machine_def);
}
if (!$cache_disabled) {
apc_store($cache_key, array($this->machine_type_table, time()));
}
}
}
