// 发布/订阅参数
$pipe_name = 'pipe1';
$pipelet_id = 2;
// 加1在哪里做好呢？
$start_point = -1;
// 取得可发布broker
$broker = $adapter->get_pub_broker($pipe_name, $pipelet_id);
if (false === $broker) {
echo "[Failure][get pub info]\n";
} else {
echo "[Success][get pub info]\n";
// 向broker发起连接请求
$pub_dest = array("socket_address" => $broker['ip'], "socket_port" => $broker['port'], "socket_timeout" => 300);
$stomp->set_destination($pub_dest);
$stomp->role = BStompRoleType::PUBLISHER;
$stomp->topic_name = $broker['stripe'];
$stomp->session_id = BigpipeUtilities::get_pipelet_name($pipe_name, $pipelet_id) . '_' . BigpipeUtilities::get_uid();
if ($stomp->connect()) {
echo '[Success][connected on broker][ip:' . $broker['ip'] . '][port:' . $broker['port'] . ']\\n';
echo '[session message id][' . $stomp->session_message_id . ']\\n';
}
echo "\n";
$ofs = fopen('pub.json', 'w+');
$oval = json_encode($broker);
fwrite($ofs, $oval);
fclose($ofs);
}
// 取得可订阅broker_group
// todo 用户操作
$stomp->close();
$adapter->uninit();
/**
* 更新meta信息, 记录重试次数
* @return boolean
*/
private function _failover()
{
// failover时, 订阅、发布状态无效，重置状态
if (true == $this->_is_subscribed) {
$this->_unsubscribe();
// 先尝试取消订阅, 但是不用考虑错误 (因为failover中有错误是常态)
$this->_is_subscribed = false;
}
if ($this->_fo_count > $this->_max_fo_cnt) {
// 重置failover
BigpipeLog::fatal("[%s:%u][%s][can not do more]", __FILE__, __LINE__, __FUNCTION__);
$this->_fo_sleep_time = 0;
$this->_fo_count = 0;
return false;
}
if (0 == $this->_fo_sleep_time) {
// 第一次flush subscribe时，我们往往不希望等待，
// 因此这时跳过sleep过程
// php中只有微秒级的usleep和秒级的sleep
$this->_fo_sleep_time = BigpipeCommonDefine::INIT_FO_SLEEP_TIME * 1000;
} else {
usleep($this->_fo_sleep_time);
}
$this->_fo_count++;
$this->_fo_sleep_time *= 2;
// increase failover sleep time
if ($this->_fo_sleep_time > BigpipeCommonDefine::MAX_FO_SLEEP_TIME) {
// failover sleep time不能无限制增长
$this->_fo_sleep_time = BigpipeCommonDefine::MAX_FO_SLEEP_TIME;
}
// 通过meta跟新stripe
if (false === $this->_update_meta()) {
BigpipeLog::fatal("[%s:%u][%s][can not update meta from meta agent]", __FILE__, __LINE__, __FUNCTION__);
return false;
}
// 随机选择并连接一个broker
$is_ok = false;
do {
$broker = $this->_random_select_broker();
if (false === $broker) {
// 无新broker可选, failover失败
BigpipeLog::fatal("[%s:%u][%s][no broker to subcribe]", __FILE__, __LINE__, __FUNCTION__);
break;
}
// try to connect to broker
$sub_dest = array("socket_address" => $broker->ip, "socket_port" => $broker->port, "socket_timeout" => $this->_conn_timeo);
$this->_stomp_adapter->set_destination($sub_dest);
$this->_stomp_adapter->role = BStompRoleType::SUBSCRIBER;
$this->_stomp_adapter->topic_name = $this->_stripe['stripe_name'];
$this->_stomp_adapter->session_id = BigpipeUtilities::get_pipelet_name($this->_pipe_name, $this->_pipelet_id) . '_' . BigpipeUtilities::get_uid();
if ($this->_stomp_adapter->connect()) {
BigpipeLog::debug("[%s:%u][%s][Success][connected on broker][ip:%s][port:%u]", __FILE__, __LINE__, __FUNCTION__, $broker->ip, $broker->port);
BigpipeLog::debug('[%s:%u][%s][session message id][smid:%s]', __FILE__, __LINE__, __FUNCTION__, $this->_stomp_adapter->session_message_id);
$is_ok = true;
break;
// 跳出连接
}
} while (true);
return $is_ok;
}