/**
* 从meta中获取可订阅的broker group
* @return sub_info on success or false on failure
*/
public function get_sub_broker_group($pipe_name, $pipelet_id, $start_point)
{
if (false === $this->_inited) {
BigpipeLog::warning("[%s:%u][%s][call uninited object]", __FILE__, __LINE__, __FUNCTION__);
return false;
}
if (empty($this->meta_name)) {
// 缺少关键条件
BigpipeLog::warning("[%s:%u][%s][missing meta name]", __FILE__, __LINE__, __FUNCTION__);
return false;
}
// pack reqestion
$cmd = new GetSubInfoFrame();
$cmd->meta_name = $this->meta_name;
$cmd->pipe_name = $pipe_name;
$cmd->pipelet_id = $pipelet_id + 1;
// 用于组成pipelet name
$cmd->start_point = $start_point;
// send
$res_body = $this->_request($cmd);
if (null === $res_body) {
BigpipeLog::warning("[%s:%u][%s][fail to get sub info][meta:%s][pipe_name:%s][pipelet_id:%d][start_point:%d]", __FILE__, __LINE__, __FUNCTION__, $this->meta_name, $pipe_name, $pipelet_id, $start_point);
return false;
}
// parse ack
$ack = new GetSubInfoAckFrame();
if (!$ack->load($res_body)) {
BigpipeLog::warning("[%s:%u][%s][error ack]", __FILE__, __LINE__, __FUNCTION__);
return false;
}
$broker_group = json_decode($ack->broker_group);
$sub_info = array('stripe_name' => $ack->stripe_name, 'stripe_id' => $ack->stripe_id, 'begin_pos' => $ack->begin_pos, 'end_pos' => $ack->end_pos, 'broker_group' => $broker_group);
return $sub_info;
}
