From 63c0cf521f8097b0dadaf1228176dc38c7d897f6 Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Thu, 15 May 2014 18:28:24 +0200
Subject: Working on config.tgz composition through config modules

---
 inc/taskmanager.inc.php | 86 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 inc/taskmanager.inc.php

(limited to 'inc/taskmanager.inc.php')

diff --git a/inc/taskmanager.inc.php b/inc/taskmanager.inc.php
new file mode 100644
index 00000000..f2f337be
--- /dev/null
+++ b/inc/taskmanager.inc.php
@@ -0,0 +1,86 @@
+<?php
+
+/**
+ * Interface to the external task manager.
+ */
+class Taskmanager
+{
+	
+	private static $sock = false;
+	
+	private static function init()
+	{
+		if (self::$sock !== false) return;
+		self::$sock = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
+		socket_set_option(self::$sock, SOL_SOCKET, SO_RCVTIMEO, array('sec' => 0, 'usec' => 100000));
+		socket_set_option(self::$sock, SOL_SOCKET, SO_SNDTIMEO, array('sec' => 0, 'usec' => 100000));
+		socket_connect(self::$sock, '127.0.0.1', 9215);
+	}
+
+	public static function submit($task, $data, $async)
+	{
+		self::init();
+		$seq = (string)mt_rand();
+		$data = json_encode($data);
+		$message = "$seq, $task, $data";
+		$sent = socket_send(self::$sock, $message, strlen($message), 0);
+		if ($async) return true;
+		$reply = self::readReply($seq);
+		if (!is_array($reply)) return false;
+		return $reply;
+	}
+
+	public static function status($taskId)
+	{
+		self::init();
+		$seq = (string)mt_rand();
+		$message = "$seq, status, $taskId";
+		$sent = socket_send(self::$sock, $message, strlen($message), 0);
+		$reply = self::readReply($seq);
+		if (!is_array($reply)) return false;
+		return $reply;
+	}
+	
+	public static function waitComplete($taskId)
+	{
+		for ($i = 0; $i < 10; ++$i) {
+			$status = self::status($taskId);
+			if (!isset($status['statusCode'])) break;
+			if ($status['statusCode'] != TASK_PROCESSING && $status['statusCode'] != TASK_WAITING) break;
+			usleep(150000);
+		}
+		return $status;
+	}
+
+	public static function release($taskId)
+	{
+		self::init();
+		$seq = (string)mt_rand();
+		$message = "$seq, release, $taskId";
+		socket_send(self::$sock, $message, strlen($message), 0);
+	}
+	
+	/**
+	 * 
+	 * @param type $seq
+	 * @return mixed the decoded json data for that message as an array, or null on error
+	 */
+	private static function readReply($seq)
+	{
+		$tries = 0;
+		while (($bytes = socket_recvfrom(self::$sock, $buf, 90000, 0, $bla1, $bla2)) !== false) {
+			$parts = explode(',', $buf, 2);
+			if (count($parts) == 2 && $parts[0] == $seq) {
+				return json_decode($parts[1], true);
+			}
+			if (++$tries > 10) return false;
+		}
+		//error_log(socket_strerror(socket_last_error(self::$sock)));
+		return false;
+	}
+
+}
+
+foreach (array('TASK_FINISHED', 'TASK_ERROR', 'TASK_WAITING', 'NO_SUCH_TASK', 'TASK_PROCESSING') as $i) {
+	define($i, $i);
+}
-- 
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