/**
* Used to send a message the given daemon or run the program in the
* foreground.
*
* @param array $argv an array of command line arguments. The argument
* start will check if the process control functions exists if these
* do they will fork and detach a child process to act as a daemon.
* a lock file will be created to prevent additional daemons from
* running. If the message is stop then a message file is written to
* tell the daemon to stop. If the argument is terminal then the
* program won't be run as a daemon.
* @param string $name the prefix to use for lock and message files
* @param bool $exit_type whether this function should exit or return
* by default a lock file is only written if exit (this allows
* both queue server processes (Indexer and Scheduler) to use the
* same lock file
*/
static function init($argv, $name, $exit_type = 1)
{
self::$name = $name;
if (isset($argv[2]) && $argv[2] != "none") {
self::$subname = $argv[2];
} else {
self::$subname = "";
}
//don't let our script be run from apache
if (isset($_SERVER['DOCUMENT_ROOT']) && strlen($_SERVER['DOCUMENT_ROOT']) > 0) {
echo "BAD REQUEST";
exit;
}
if (!isset($argv[1])) {
echo "{$name} needs to be run with a command-line argument.\n";
echo "For example,\n";
echo "php {$name}.php start //starts the {$name} as a daemon\n";
echo "php {$name}.php stop //stops the {$name} daemon\n";
echo "php {$name}.php terminal //runs {$name} within the current " . "process, not as a daemon, output going to the terminal\n";
exit;
}
$messages_file = self::getMesssageFileName(self::$name, self::$subname);
switch ($argv[1]) {
case "start":
$options = "";
for ($i = 3; $i < count($argv); $i++) {
$options .= " " . $argv[$i];
}
$subname = !isset($argv[2]) || $argv[2] == 'none' ? 'none' : self::$subname;
$name_prefix = isset($argv[3]) ? $argv[3] : self::$subname;
$name_string = CrawlDaemon::getNameString($name, $name_prefix);
echo "Starting {$name_string}...\n";
CrawlDaemon::start($name, $subname, $options, $exit_type);
break;
case "stop":
CrawlDaemon::stop($name, self::$subname);
break;
case "terminal":
self::$mode = 'terminal';
$info = array();
$info[self::STATUS] = self::WAITING_START_MESSAGE_STATE;
file_put_contents($messages_file, serialize($info));
chmod($messages_file, 0777);
define("LOG_TO_FILES", false);
break;
case "child":
self::$mode = 'daemon';
$info = array();
$info[self::STATUS] = self::WAITING_START_MESSAGE_STATE;
file_put_contents($messages_file, serialize($info));
chmod($messages_file, 0777);
define("LOG_TO_FILES", true);
// if false log messages are sent to the console
break;
default:
exit;
break;
}
}
