Merge branch 'testing'

1 files changed, 169 insertions, 0 deletions

diff --git a/lib/stompqueuemanager.php b/lib/stompqueuemanager.php
new file mode 100644
index 000000000..46baeb5c7
--- /dev/null
+++ b/lib/stompqueuemanager.php
@@ -0,0 +1,169 @@
+<?php
+/**
+ * Laconica, the distributed open-source microblogging tool
+ *
+ * Abstract class for queue managers
+ *
+ * PHP version 5
+ *
+ * LICENCE: This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @category  QueueManager
+ * @package   Laconica
+ * @author    Evan Prodromou <evan@controlyourself.ca>
+ * @author    Sarven Capadisli <csarven@controlyourself.ca>
+ * @copyright 2009 Control Yourself, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link      http://laconi.ca/
+ */
+
+require_once 'Stomp.php';
+
+class LiberalStomp extends Stomp
+{
+    function getSocket()
+    {
+        return $this->_socket;
+    }
+}
+
+class StompQueueManager
+{
+    var $server = null;
+    var $username = null;
+    var $password = null;
+    var $base = null;
+    var $con = null;
+
+    function __construct()
+    {
+        $this->server   = common_config('queue', 'stomp_server');
+        $this->username = common_config('queue', 'stomp_username');
+        $this->password = common_config('queue', 'stomp_password');
+        $this->base     = common_config('queue', 'queue_basename');
+    }
+
+    function _connect()
+    {
+        if (empty($this->con)) {
+            $this->_log(LOG_INFO, "Connecting to '$this->server' as '$this->username'...");
+            $this->con = new LiberalStomp($this->server);
+
+            if ($this->con->connect($this->username, $this->password)) {
+                $this->_log(LOG_INFO, "Connected.");
+            } else {
+                $this->_log(LOG_ERR, 'Failed to connect to queue server');
+                throw new ServerException('Failed to connect to queue server');
+            }
+        }
+    }
+
+    function enqueue($object, $queue)
+    {
+        $notice = $object;
+
+        $this->_connect();
+
+        // XXX: serialize and send entire notice
+
+        $result = $this->con->send($this->_queueName($queue),
+                                   $notice->id, 		// BODY of the message
+                                   array ('created' => $notice->created));
+
+        if (!$result) {
+            common_log(LOG_ERR, 'Error sending to '.$queue.' queue');
+            return false;
+        }
+
+        common_log(LOG_DEBUG, 'complete remote queueing notice ID = '
+                   . $notice->id . ' for ' . $queue);
+    }
+
+    function service($queue, $handler)
+    {
+        $result = null;
+
+        $this->_connect();
+
+        $this->con->setReadTimeout($handler->timeout());
+
+        $this->con->subscribe($this->_queueName($queue));
+
+        while (true) {
+
+            // Wait for something on one of our sockets
+
+            $stompsock = $this->con->getSocket();
+
+            $handsocks = $handler->getSockets();
+
+            $socks = array_merge(array($stompsock), $handsocks);
+
+            $read = $socks;
+            $write = array();
+            $except = array();
+
+            $ready = stream_select($read, $write, $except, $handler->timeout(), 0);
+
+            if ($ready === false) {
+                $this->_log(LOG_ERR, "Error selecting on sockets");
+            } else if ($ready > 0) {
+                if (in_array($stompsock, $read)) {
+                    $this->_handleNotice($queue, $handler);
+                }
+                $handler->idle(QUEUE_HANDLER_HIT_IDLE);
+            }
+        }
+
+        $this->con->unsubscribe($this->_queueName($queue));
+    }
+
+    function _handleNotice($queue, $handler)
+    {
+        $frame = $this->con->readFrame();
+
+        if (!empty($frame)) {
+            $notice = Notice::staticGet('id', $frame->body);
+
+            if (empty($notice)) {
+                $this->_log(LOG_WARNING, 'Got ID '. $frame->body .' for non-existent notice in queue '. $queue);
+                $this->con->ack($frame);
+            } else {
+                if ($handler->handle_notice($notice)) {
+                    $this->_log(LOG_INFO, 'Successfully handled notice '. $notice->id .' posted at ' . $frame->headers['created'] . ' in queue '. $queue);
+                    $this->con->ack($frame);
+                } else {
+                    $this->_log(LOG_WARNING, 'Failed handling notice '. $notice->id .' posted at ' . $frame->headers['created']  . ' in queue '. $queue);
+                    // FIXME we probably shouldn't have to do
+                    // this kind of queue management ourselves
+                    $this->con->ack($frame);
+                    $this->enqueue($notice, $queue);
+                }
+                unset($notice);
+            }
+
+            unset($frame);
+        }
+    }
+
+    function _queueName($queue)
+    {
+        return common_config('queue', 'queue_basename') . $queue;
+    }
+
+    function _log($level, $msg)
+    {
+        common_log($level, 'StompQueueManager: '.$msg);
+    }
+}