[PLUGINS] Added StompQueue plugin, based on the implementation in lib/queue/stompqueuemanager. Updated to new STOMP library version. Dropped liberalstomp.php and stompqueuemanager.php
This commit is contained in:
Miguel Dantas
72
plugins/StompQueue/StompQueuePlugin.php
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72
plugins/StompQueue/StompQueuePlugin.php
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@@ -0,0 +1,72 @@
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<?php
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// This file is part of GNU social - https://www.gnu.org/software/social
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//
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// GNU social is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// GNU social is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
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/**
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* STOMP interface for GNU social queues
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*
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* @package GNUsocial
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* @author Miguel Dantas <biodantasgs@gmail.com>
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* @copyright 2019 Free Software Foundation, Inc http://www.fsf.org
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* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
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*/
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defined('GNUSOCIAL') || die();
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class StompQueuePlugin extends Plugin
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{
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const PLUGIN_VERSION = '0.0.1';
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// settings which can be set in config.php with addPlugin('StompQueue', ['param'=>'value', ...]);
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public $servers = null;
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public $vhost = '';
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public $username = 'guest';
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public $password = 'guest';
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public $basename = '';
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public $control = 'gnusocial:control';
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public $breakout;
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public $useTransactions = false;
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public $useAcks = false;
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public $manualFailover = false;
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public $defaultIdx = 0;
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public $persistent = [];
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public function onStartNewQueueManager(?QueueManager &$qm)
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{
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if (empty($this->servers)) {
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throw new ServerException('Invalid STOMP server address');
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} elseif (!is_array($this->servers)) {
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$this->servers = [$this->servers];
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}
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if (empty($this->basename)) {
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$this->basename = 'queue:gnusocial-' . common_config('site', 'name') . ':';
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}
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$qm = new StompQueueManager($this);
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return false;
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}
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public function onPluginVersion(array &$versions): bool
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{
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$versions[] = array('name' => 'StompQueue',
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'version' => self::VERSION,
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'author' => 'Miguel Dantas',
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'description' =>
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// TRANS: Plugin description.
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_m('Plugin implementing STOMP as a backend for GNU social queues'));
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return true;
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}
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};
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622
plugins/StompQueue/classes/StompQueueManager.php
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622
plugins/StompQueue/classes/StompQueueManager.php
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@@ -0,0 +1,622 @@
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<?php
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use Stomp\Client;
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use Stomp\Exception\StompException;
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use Stomp\Network\Connection;
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use Stomp\Transport\Frame;
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use Stomp\Transport\Message;
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use Stomp\StatefulStomp;
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class StompQueueManager extends QueueManager
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{
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protected $pl = null;
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protected $stomps = null;
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protected $transaction;
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protected $transactionCount;
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protected $activeGroups;
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public function __construct($pl)
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{
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parent::__construct();
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$this->pl = $pl;
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}
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/**
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* Initialize our connection and subscribe to all the queues
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* we're going to need to handle... If multiple queue servers
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* are configured for failover, we'll listen to all of them.
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*
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* Side effects: in multi-site mode, may reset site configuration.
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*
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* @param IoMaster $master process/event controller
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* @return bool return false on failure
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* @throws ServerException
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*/
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public function start($master)
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{
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parent::start($master);
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common_debug("Starting STOMP queue manager");
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return $this->_ensureConn();
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}
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/**
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* Close out any active connections.
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*
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* @return bool return false on failure
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* @throws Exception
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*/
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public function finish()
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{
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foreach ($this->stomps as $idx => $stomp) {
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common_log(LOG_INFO, "Unsubscribing on: " . $stomp->getClient()->getConnection()->getHost());
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$stomp->unsubscribe();
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}
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// If there are any outstanding delivered messages we haven't processed,
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// free them for another thread to take.
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foreach ($this->stomps as $i => $st) {
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if ($st) {
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$this->rollback($i);
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$st->getClient()->disconnect();
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$this->stomps[$i] = null;
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}
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}
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return true;
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}
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/**
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* Lazy open connections to all STOMP servers, if in manual failover
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* mode. This means the queue servers don't speak to each other, so
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* we have to listen to all of them to make sure we get all events.
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*/
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private function _ensureConn()
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{
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if ($this->stomps === null) {
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if (!$this->pl->manualFailover) {
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$list = $this->pl->servers;
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if (count($list) > 1) {
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shuffle($list); // Randomize to spread load
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$url = 'failover://(' . implode(',', $list) . ')';
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} else {
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$url = $list[0];
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}
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$st = $this->_doConnect($url);
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$this->stomps = [$st];
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$this->transactionCount = [0];
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$this->transaction = [null];
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$this->disconnect = [null];
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} else {
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$this->stomps = [];
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$this->transactionCount = [];
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$this->transaction = [];
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foreach ($this->pl->servers as $_ => $url) {
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try {
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$this->stomps[] = $this->_doConnect($url);
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$this->disconnect[] = null; // If the previous succeeded
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} catch (Exception $e) {
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// s'okay, we'll live
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$this->stomps[] = null;
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$this->disconnect[] = time();
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}
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$this->transactionCount[] = 0;
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$this->transaction[] = null;
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}
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}
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// Done attempting connections
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if (empty($this->stomps)) {
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throw new ServerException("No STOMP queue servers reachable");
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} else {
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foreach ($this->stomps as $i => $st) {
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if ($st) {
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$this->subscribe($st);
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$this->begin($i);
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}
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}
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}
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}
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return true;
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}
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protected function _doConnect($server_url)
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{
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common_debug("STOMP: connecting to '{$server_url}' as '{$this->pl->username}'...");
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$cl = new Client($server_url);
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$cl->setLogin($this->pl->username, $this->pl->password);
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$cl->setVhostname($this->pl->vhost);
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try {
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$cl->connect();
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common_debug("STOMP connected.");
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} catch (StompException $e) {
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common_log(LOG_ERR, 'Failed to connect to STOMP queue server');
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throw new ServerException('Failed to connect to STOMP queue server');
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}
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return new StatefulStomp($cl);
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}
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/**
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* Grab a full list of stomp-side queue subscriptions.
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* Will include:
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* - control broadcast channel
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* - shared group queues for active groups
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* - per-handler and per-site breakouts that are rooted in the active groups.
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*
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* @return array of strings
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*/
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protected function subscriptions(): array
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{
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$subs = [];
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$subs[] = $this->pl->control;
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foreach ($this->activeGroups as $group) {
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$subs[] = $this->pl->basename . $group;
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}
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foreach ($this->pl->breakout as $spec) {
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$parts = explode(':', $spec);
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if (count($parts) < 2 || count($parts) > 3) {
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common_log(LOG_ERR, "Bad queue breakout specifier '{$spec}'");
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}
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if (in_array($parts[0], $this->activeGroups)) {
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$subs[] = $this->pl->basename . $spec;
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}
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}
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return array_unique($subs);
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}
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/**
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* Set up all our raw queue subscriptions on the given connection
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* @param Client $st
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*/
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protected function subscribe(StatefulStomp $st)
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{
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$host = $st->getClient()->getConnection()->getHost();
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foreach ($this->subscriptions() as $sub) {
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if (!in_array($sub, $this->subscriptions)) {
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$this->_log(LOG_INFO, "Subscribing to '{$sub}' on '{$host}'");
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try {
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$st->subscribe($sub);
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} catch (Exception $e) {
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common_log(LOG_ERR, "STOMP received exception: " . get_class($e) .
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" while trying to subscribe: " . $e->getMessage());
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throw $e;
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}
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$this->subscriptions[] = $sub;
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}
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}
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}
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protected function begin($idx)
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{
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if ($this->pl->useTransactions) {
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if (!empty($this->transaction[$idx])) {
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throw new Exception("Tried to start transaction in the middle of a transaction");
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}
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$this->transactionCount[$idx]++;
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$this->transaction[$idx] = $this->master->id . '-' . $this->transactionCount[$idx] . '-' . time();
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$this->stomps[$idx]->begin($this->transaction[$idx]);
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}
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}
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protected function ack($idx, $frame)
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{
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if ($this->pl->useAcks) {
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if ($this->pl->useTransactions) {
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if (empty($this->transaction[$idx])) {
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throw new Exception("Tried to ack but not in a transaction");
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}
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$this->stomps[$idx]->ack($frame, $this->transaction[$idx]);
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} else {
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$this->stomps[$idx]->ack($frame);
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}
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}
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}
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protected function commit($idx)
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{
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if ($this->useTransactions) {
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if (empty($this->transaction[$idx])) {
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throw new Exception("Tried to commit but not in a transaction");
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}
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$this->stomps[$idx]->commit($this->transaction[$idx]);
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$this->transaction[$idx] = null;
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}
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}
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protected function rollback($idx)
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{
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if ($this->useTransactions) {
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if (empty($this->transaction[$idx])) {
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throw new Exception("Tried to rollback but not in a transaction");
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}
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$this->stomps[$idx]->abort($this->transaction[$idx]);
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$this->transaction[$idx] = null;
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}
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}
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/**
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* Saves an object into the queue item table.
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*
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* @param mixed $object
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* @param string $queue
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* @param string $siteNickname optional override to drop into another site's queue
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* @throws Exception
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*/
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public function enqueue($object, $queue, $siteNickname = null)
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{
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$this->_ensureConn();
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$idx = $this->pl->defaultIdx;
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$rep = $this->logrep($object);
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$envelope = ['site' => $siteNickname ?: common_config('site', 'nickname'),
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'handler' => $queue,
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'payload' => $this->encode($object)];
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$msg = base64_encode(serialize($envelope));
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$props = ['created' => common_sql_now()];
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if ($this->isPersistent($queue)) {
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$props['persistent'] = 'true';
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}
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$st = $this->stomps[$idx];
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$host = $st->getClient()->getConnection()->getHost();
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$target = $this->queueName($queue);
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$result = $st->send($target, new Message($msg), $props);
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if (!$result) {
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common_log(LOG_ERR, "STOMP error sending $rep to $queue queue on $host $target");
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return false;
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}
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common_debug("STOMP complete remote queueing $rep for queue `$queue` on host `$host` on channel `$target`");
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$this->stats('enqueued', $queue);
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return true;
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}
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/**
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* Determine whether messages to this queue should be marked as persistent.
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* Actual persistent storage depends on the queue server's configuration.
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* @param string $queue
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* @return bool
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*/
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protected function isPersistent($queue)
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{
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$mode = $this->pl->persistent;
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if (is_array($mode)) {
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return in_array($queue, $mode);
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} else {
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return (bool)$mode;
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}
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}
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/**
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* Send any sockets we're listening on to the IO manager
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* to wait for input.
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*
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* @return array of resources
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*/
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public function getSockets()
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{
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$sockets = [];
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foreach ($this->stomps as $st) {
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if ($st) {
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$sockets[] = $st->getClient()->getConnection();
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}
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}
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return $sockets;
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}
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/**
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* Get the Stomp connection object associated with the given socket.
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* @param resource $socket
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* @return int index into connections list
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* @throws Exception
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*/
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protected function connectionFromSocket($socket)
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{
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foreach ($this->stomps as $i => $st) {
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if ($st && $st->getConnection() === $socket) {
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return $i;
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}
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}
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throw new Exception(__CLASS__ . " asked to read from unrecognized socket");
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}
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/**
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* Handle and acknowledge an event that's come in through a queue.
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*
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* If the queue handler reports failure, the message is requeued for later.
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* Missing notices or handler classes will drop the message.
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*
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* Side effects: in multi-site mode, may reset site configuration to
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* match the site that queued the event.
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*
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* @param Frame $frame
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* @return bool success
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* @throws ConfigException
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* @throws NoConfigException
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* @throws ServerException
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* @throws StompException
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*/
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protected function handleItem($frame): bool
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{
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$host = $this->stomps[$this->pl->defaultIdx]->getHost();
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$message = unserialize(base64_decode($frame->body));
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if ($message === false) {
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common_log(LOG_ERR, "STOMP can't unserialize frame: {$frame->body}\n" .
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'Unserializable frame length: ' . strlen($frame->body));
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return false;
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}
|
||||
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$site = $message['site'];
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$queue = $message['handler'];
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if ($this->isDeadLetter($frame, $message)) {
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$this->stats('deadletter', $queue);
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return false;
|
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}
|
||||
|
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// @fixme detect failing site switches
|
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$this->switchSite($site);
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try {
|
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$item = $this->decode($message['payload']);
|
||||
} catch (Exception $e) {
|
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common_log(LOG_ERR, "Skipping empty or deleted item in queue {$queue} from {$host}");
|
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$this->stats('baditem', $queue);
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return false;
|
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}
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||||
|
||||
$info = $this->logrep($item) . ' posted at ' .
|
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$frame->getHeaders()['created'] . " in queue {$queue} from {$host}";
|
||||
try {
|
||||
$handler = $this->getHandler($queue);
|
||||
$ok = $handler->handle($item);
|
||||
} catch (NoQueueHandlerException $e) {
|
||||
common_log(LOG_ERR, "Missing handler class; skipping $info");
|
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$this->stats('badhandler', $queue);
|
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return false;
|
||||
} catch (Exception $e) {
|
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common_log(LOG_ERR, "Exception on queue $queue: " . $e->getMessage());
|
||||
$ok = false;
|
||||
}
|
||||
|
||||
if ($ok) {
|
||||
common_log(LOG_INFO, "Successfully handled $info");
|
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$this->stats('handled', $queue);
|
||||
} else {
|
||||
common_log(LOG_WARNING, "Failed handling $info");
|
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// Requeing moves the item to the end of the line for its next try.
|
||||
// @fixme add a manual retry count
|
||||
$this->enqueue($item, $queue);
|
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$this->stats('requeued', $queue);
|
||||
}
|
||||
|
||||
return $ok;
|
||||
}
|
||||
|
||||
/**
|
||||
* Check if a redelivered message has been run through enough
|
||||
* that we're going to give up on it.
|
||||
*
|
||||
* @param Frame $frame
|
||||
* @param array $message unserialized message body
|
||||
* @return bool true if we should discard
|
||||
*/
|
||||
protected function isDeadLetter($frame, $message)
|
||||
{
|
||||
if (isset($frame->getHeaders()['redelivered']) && $frame->getHeaders()['redelivered'] == 'true') {
|
||||
// Message was redelivered, possibly indicating a previous failure.
|
||||
$msgId = $frame->getHeaders()['message-id'];
|
||||
$site = $message['site'];
|
||||
$queue = $message['handler'];
|
||||
$msgInfo = "message $msgId for $site in queue $queue";
|
||||
|
||||
$deliveries = $this->incDeliveryCount($msgId);
|
||||
if ($deliveries > common_config('queue', 'max_retries')) {
|
||||
$info = "DEAD-LETTER FILE: Gave up after retry $deliveries on $msgInfo";
|
||||
|
||||
$outdir = common_config('queue', 'dead_letter_dir');
|
||||
if ($outdir) {
|
||||
$filename = $outdir . "/$site-$queue-" . rawurlencode($msgId);
|
||||
$info .= ": dumping to $filename";
|
||||
file_put_contents($filename, $message['payload']);
|
||||
}
|
||||
|
||||
common_log(LOG_ERR, $info);
|
||||
return true;
|
||||
} else {
|
||||
common_log(LOG_INFO, "retry $deliveries on $msgInfo");
|
||||
}
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
/**
|
||||
* Update count of times we've re-encountered this message recently,
|
||||
* triggered when we get a message marked as 'redelivered'.
|
||||
*
|
||||
* Requires a CLI-friendly cache configuration.
|
||||
*
|
||||
* @param string $msgId message-id header from message
|
||||
* @return int number of retries recorded
|
||||
*/
|
||||
function incDeliveryCount($msgId)
|
||||
{
|
||||
$count = 0;
|
||||
$cache = Cache::instance();
|
||||
if ($cache) {
|
||||
$key = 'gnusocial:stomp:message-retries:' . $msgId;
|
||||
$count = $cache->increment($key);
|
||||
if (!$count) {
|
||||
$count = 1;
|
||||
$cache->set($key, $count, null, 3600);
|
||||
}
|
||||
}
|
||||
return $count;
|
||||
}
|
||||
|
||||
/**
|
||||
* Combines the queue_basename from configuration with the
|
||||
* group name for this queue to give eg:
|
||||
*
|
||||
* /queue/statusnet/main
|
||||
* /queue/statusnet/main/distrib
|
||||
* /queue/statusnet/xmpp/xmppout/site01
|
||||
*
|
||||
* @param string $queue
|
||||
* @return string
|
||||
* @throws Exception
|
||||
*/
|
||||
protected function queueName(string $queue): string
|
||||
{
|
||||
$group = $this->queueGroup($queue);
|
||||
$site = GNUsocial::currentSite();
|
||||
|
||||
foreach (["$group:$queue:$site", "$group:$queue"] as $spec) {
|
||||
if (in_array($spec, $this->breakout)) {
|
||||
return $this->pl->basename . $spec;
|
||||
}
|
||||
}
|
||||
return $this->pl->basename . $group;
|
||||
}
|
||||
|
||||
/**
|
||||
* Get the breakout mode for the given queue on the current site.
|
||||
*
|
||||
* @param string $queue
|
||||
* @return string one of 'shared', 'handler', 'site'
|
||||
*/
|
||||
protected function breakoutMode($queue)
|
||||
{
|
||||
if (isset($this->pl->breakout[$queue])) {
|
||||
return $this->pl->breakout[$queue];
|
||||
} else if (isset($this->pl->breakout['*'])) {
|
||||
return $this->pl->breakout['*'];
|
||||
} else {
|
||||
return 'shared';
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Tell the i/o master we only need a single instance to cover
|
||||
* all sites running in this process.
|
||||
*/
|
||||
public static function multiSite()
|
||||
{
|
||||
return IoManager::INSTANCE_PER_PROCESS;
|
||||
}
|
||||
|
||||
/**
|
||||
* Optional; ping any running queue handler daemons with a notification
|
||||
* such as announcing a new site to handle or requesting clean shutdown.
|
||||
* This avoids having to restart all the daemons manually to update configs
|
||||
* and such.
|
||||
*
|
||||
* Currently only relevant for multi-site queue managers such as Stomp.
|
||||
*
|
||||
* @param string $event event key
|
||||
* @param string $param optional parameter to append to key
|
||||
* @return bool success
|
||||
*/
|
||||
public function sendControlSignal($event, $param = '')
|
||||
{
|
||||
$message = $event;
|
||||
if ($param != '') {
|
||||
$message .= ':' . $param;
|
||||
}
|
||||
$this->_ensureConn();
|
||||
$st = $this->stomps[$this->pl->defaultIdx];
|
||||
$result = $st->send($this->pl->control, $message, ['created' => common_sql_now()]);
|
||||
if ($result) {
|
||||
common_log(LOG_INFO, "Sent control ping to STOMP queue daemons: $message");
|
||||
return true;
|
||||
} else {
|
||||
common_log(LOG_ERR, "Failed sending control ping to STOMP queue daemons: $message");
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Process a control signal broadcast.
|
||||
*
|
||||
* @param int $idx connection index
|
||||
* @param array $frame Stomp frame
|
||||
* @return bool true to continue; false to stop further processing.
|
||||
* @throws ConfigException
|
||||
* @throws NoConfigException
|
||||
* @throws ServerException
|
||||
*/
|
||||
protected function handleControlSignal(int $idx, $frame): bool
|
||||
{
|
||||
$message = trim($frame->body);
|
||||
if (strpos($message, ':') !== false) {
|
||||
list($event, $param) = explode(':', $message, 2);
|
||||
} else {
|
||||
$event = $message;
|
||||
$param = '';
|
||||
}
|
||||
|
||||
$shutdown = false;
|
||||
|
||||
if ($event == 'shutdown') {
|
||||
$this->master->requestShutdown();
|
||||
$shutdown = true;
|
||||
} else if ($event == 'restart') {
|
||||
$this->master->requestRestart();
|
||||
$shutdown = true;
|
||||
} else if ($event == 'update') {
|
||||
$this->updateSiteConfig($param);
|
||||
} else {
|
||||
common_log(LOG_ERR, "Ignoring unrecognized control message: $message");
|
||||
}
|
||||
return $shutdown;
|
||||
}
|
||||
|
||||
/**
|
||||
* Switch site, if necessary, and reset current handler assignments
|
||||
* @param string $site
|
||||
* @throws ConfigException
|
||||
* @throws NoConfigException
|
||||
* @throws ServerException
|
||||
*/
|
||||
function switchSite($site)
|
||||
{
|
||||
if ($site != GNUsocial::currentSite()) {
|
||||
$this->stats('switch');
|
||||
GNUsocial::switchSite($site);
|
||||
$this->initialize();
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* (Re)load runtime configuration for a given site by nickname,
|
||||
* triggered by a broadcast to the 'statusnet-control' topic.
|
||||
*
|
||||
* Configuration changes in database should update, but config
|
||||
* files might not.
|
||||
*
|
||||
* @param $nickname
|
||||
* @return void true to continue; false to stop further processing.
|
||||
* @throws ConfigException
|
||||
* @throws NoConfigException
|
||||
* @throws ServerException
|
||||
*/
|
||||
protected function updateSiteConfig($nickname)
|
||||
{
|
||||
$sn = Status_network::getKV('nickname', $nickname);
|
||||
if ($sn) {
|
||||
$this->switchSite($nickname);
|
||||
if (!in_array($nickname, $this->sites)) {
|
||||
$this->addSite();
|
||||
}
|
||||
$this->stats('siteupdate');
|
||||
} else {
|
||||
common_log(LOG_ERR, "Ignoring ping for unrecognized new site $nickname");
|
||||
}
|
||||
}
|
||||
};
|
||||
Reference in New Issue
Block a user