- function db_dispatch() {
- do {
- $qi = Queue_item::top($this->transport());
- if ($qi) {
- $this->log(LOG_INFO, 'Got item enqueued '.common_exact_date($qi->created));
- $notice = Notice::staticGet($qi->notice_id);
- if ($notice) {
- $this->log(LOG_INFO, 'broadcasting notice ID = ' . $notice->id);
- # XXX: what to do if broadcast fails?
- $result = $this->handle_notice($notice);
- if (!$result) {
- $this->log(LOG_WARNING, 'Failed broadcast for notice ID = ' . $notice->id);
- $orig = $qi;
- $qi->claimed = null;
- $qi->update($orig);
- $this->log(LOG_WARNING, 'Abandoned claim for notice ID = ' . $notice->id);
- continue;
- }
- $this->log(LOG_INFO, 'finished broadcasting notice ID = ' . $notice->id);
- $notice->free();
- unset($notice);
- $notice = null;
- } else {
- $this->log(LOG_WARNING, 'queue item for notice that does not exist');
- }
- $qi->delete();
- $qi->free();
- unset($qi);
- $this->idle(0);
- } else {
- $this->clear_old_claims();
- $this->idle(5);
- }
- } while (true);
- }
-
- function stomp_dispatch() {
-
- // use an external message queue system via STOMP
- require_once("Stomp.php");
-
- $server = common_config('queue','stomp_server');
- $username = common_config('queue', 'stomp_username');
- $password = common_config('queue', 'stomp_password');
-
- $con = new Stomp($server);
-
- if (!$con->connect($username, $password)) {
- $this->log(LOG_ERR, 'Failed to connect to queue server');
- return false;
- }
-
- $queue_basename = common_config('queue','queue_basename');
- // subscribe to the relevant queue (format: basename-transport)
- $con->subscribe('/queue/'.$queue_basename.'-'.$this->transport());
-
- do {
- $frame = $con->readFrame();
- if ($frame) {
- $this->log(LOG_INFO, 'Got item enqueued '.common_exact_date($frame->headers['created']));
-
- // XXX: Now the queue handler receives only the ID of the
- // notice, and it has to get it from the DB
- // A massive improvement would be avoid DB query by transmitting
- // all the notice details via queue server...
- $notice = Notice::staticGet($frame->body);
-
- if ($notice) {
- $this->log(LOG_INFO, 'broadcasting notice ID = ' . $notice->id);
- $result = $this->handle_notice($notice);
- if ($result) {
- // if the msg has been handled positively, ack it
- // and the queue server will remove it from the queue
- $con->ack($frame);
- $this->log(LOG_INFO, 'finished broadcasting notice ID = ' . $notice->id);
- }
- else {
- // no ack
- $this->log(LOG_WARNING, 'Failed broadcast for notice ID = ' . $notice->id);
- }
- $notice->free();
- unset($notice);
- $notice = null;
- } else {
- $this->log(LOG_WARNING, 'queue item for notice that does not exist');
- }
- }
- } while (true);
-
- $con->disconnect();
- }
-