1 files changed, 84 insertions, 0 deletions
diff --git a/lib/processmanager.php b/lib/processmanager.php
new file mode 100644
index 000000000..6032bfc5c
--- /dev/null
+++ b/lib/processmanager.php
@@ -0,0 +1,84 @@
+<?php
+/**
+ * StatusNet, the distributed open-source microblogging tool
+ *
+ * i/o manager to watch for a dead parent process
+ *
+ * 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   StatusNet
+ * @author    Brion Vibber <brion@status.net>
+ * @copyright 2010 StatusNet, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link      http://status.net/
+ */
+
+class ProcessManager extends IoManager
+{
+    protected $socket;
+
+    public static function get()
+    {
+        throw new Exception("Must pass ProcessManager per-instance");
+    }
+
+    public function __construct($socket)
+    {
+        $this->socket = $socket;
+    }
+
+    /**
+     * Tell the i/o queue master if and how we can handle multi-site
+     * processes.
+     *
+     * Return one of:
+     *   IoManager::SINGLE_ONLY
+     *   IoManager::INSTANCE_PER_SITE
+     *   IoManager::INSTANCE_PER_PROCESS
+     */
+    public static function multiSite()
+    {
+        return IoManager::INSTANCE_PER_PROCESS;
+    }
+
+    /**
+     * We won't get any input on it, but if it's broken we'll
+     * know something's gone horribly awry.
+     *
+     * @return array of resources
+     */
+    function getSockets()
+    {
+        return array($this->socket);
+    }
+
+    /**
+     * See if the parent died and request a shutdown...
+     *
+     * @param resource $socket
+     * @return boolean success
+     */
+    function handleInput($socket)
+    {
+        if (feof($socket)) {
+            common_log(LOG_INFO, "Parent process exited; shutting down child.");
+            $this->master->requestShutdown();
+        }
+        return true;
+    }
+}
+