/**
* 执行平滑重启流程
* @return void
*/
protected static function reload()
{
// 主进程部分
if (self::$_masterPid === posix_getpid()) {
// 设置为平滑重启状态
if (self::$_status !== self::STATUS_RELOADING && self::$_status !== self::STATUS_SHUTDOWN) {
self::log("Workerman[" . basename(self::$_startFile) . "] reloading");
self::$_status = self::STATUS_RELOADING;
}
// 如果有worker设置了reloadable=false，则过滤掉
$reloadable_pid_array = array();
foreach (self::$_pidMap as $worker_id => $worker_pid_array) {
$worker = self::$_workers[$worker_id];
if ($worker->reloadable) {
foreach ($worker_pid_array as $pid) {
$reloadable_pid_array[$pid] = $pid;
}
} else {
foreach ($worker_pid_array as $pid) {
// 给reloadable=false的进程也发送一个reload信号，触发onWorkerReload
posix_kill($pid, SIGUSR1);
}
}
}
// 得到所有可以重启的进程
self::$_pidsToRestart = array_intersect(self::$_pidsToRestart, $reloadable_pid_array);
// 平滑重启完毕
if (empty(self::$_pidsToRestart)) {
if (self::$_status !== self::STATUS_SHUTDOWN) {
self::$_status = self::STATUS_RUNNING;
}
return;
}
// 继续执行平滑重启流程
$one_worker_pid = current(self::$_pidsToRestart);
// 给子进程发送平滑重启信号
posix_kill($one_worker_pid, SIGUSR1);
// 定时器，如果子进程在KILL_WORKER_TIMER_TIME秒后没有退出，则强行杀死
Timer::add(self::KILL_WORKER_TIMER_TIME, 'posix_kill', array($one_worker_pid, SIGKILL), false);
} else {
// 如果当前worker的reloadable属性为真，则执行退出
$worker = current(self::$_workers);
// 如果有设置Reload回调，则执行
if ($worker->onWorkerReload) {
call_user_func($worker->onWorkerReload, $worker);
}
if ($worker->reloadable) {
self::stopAll();
}
}
}
