/**
* Rewind the iterator
*
* @return void
*/
public function rewind()
{
$this->iterators = array();
foreach ($this->topicRegistry->partitions($this->topic) as $broker => $nPartitions) {
for ($partition = 0; $partition < $nPartitions; ++$partition) {
list($host, $port) = explode(':', $this->brokerRegistry->address($broker));
$offset = $this->offsetRegistry->offset($this->topic, $broker, $partition);
$this->iterators[] = (object) array('consumer' => null, 'host' => $host, 'port' => $port, 'broker' => $broker, 'partition' => $partition, 'offset' => $offset, 'uncommittedOffset' => 0, 'messages' => null);
++$this->nIterators;
}
}
if (0 == count($this->iterators)) {
throw new Kafka_Exception_InvalidTopic('Cannot find topic ' . $this->topic);
}
// get a random broker/partition every time
$this->shuffle();
}
// pid dir
$pid_dir = __DIR__ . '/log/import_workers';
if (!file_exists($pid_dir)) {
mkdir($pid_dir);
}
// save log pid
file_put_contents($pid_dir . '/log.pid', posix_getpid());
// zookeeper address (one or more, separated by commas)
$zkaddress = '192.168.1.211:2121,192.168.1.212:2121,192.168.1.213:2121';
// kafka topic to consume from
$topic = 'topic_name';
// start and monitor kafka by host and port
while (true) {
try {
$zookeeper = new Zookeeper($zkaddress);
$topicRegistry = new Kafka_Registry_Topic($zookeeper);
$brokerRegistry = new Kafka_Registry_Broker($zookeeper);
// all hosts and ports
foreach ($topicRegistry->partitions($topic) as $broker => $nPartitions) {
// get host and port
list($host, $port) = explode(':', $brokerRegistry->address($broker));
$lockfile = "{$pid_dir}/kafka_{$host}:{$port}.pid";
$pid = @file_get_contents($lockfile);
if ($pid === false || posix_getsid($pid) === false) {
file_put_contents(__DIR__ . '/log/kafka_error_' . date('Ymd') . '.log', '[' . date('H:i:s') . ']' . "Process({$host}:{$port}) has died! restarting...\n", FILE_APPEND);
system("/path/to/php/bin/php " . __DIR__ . "/import.php step kafka host {$host} port {$port} > /dev/null 2>&1 &");
}
}
} catch (Exception $exception) {
file_put_contents(__DIR__ . '/log/kafka_error_' . date('Ymd') . '.log', '[' . date('H:i:s') . ']' . 'EXCEPTION: ' . $exception->getMessage() . "\n", FILE_APPEND);
}