memcacheMonitor: sanity check which checks availability of memcache servers

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@1334 44740490-163a-0410-bde0-09ae8108e29a

modules/memcacheMonitor/hooks/hook_sanitycheck.php

+<?php
+
+/**
+ * Sanity check for memcache servers.
+ *
+ * This function verifies that all memcache servers work.
+ *
+ * @param array &$hookinfo  hookinfo
+ */
+function memcacheMonitor_hook_sanitycheck(&$hookinfo) {
+	assert('is_array($hookinfo)');
+	assert('array_key_exists("errors", $hookinfo)');
+	assert('array_key_exists("info", $hookinfo)');
+
+	try {
+		$servers = SimpleSAML_Memcache::getRawStats();
+	} catch (Exception $e) {
+		$hookinfo['errors'][] = '[memcacheMonitor] Error parsing memcache configuration: ' . $e->getMessage();
+		return;
+	}
+
+	$allOK = TRUE;
+	foreach ($servers as $group) {
+		foreach ($group as $server => $status) {
+			if ($status === FALSE) {
+				$hookinfo['errors'][] = '[memcacheMonitor] No response from server: ' . $server;
+				$allOK = FALSE;
+			}
+		}
+	}
+
+	if ($allOK) {
+		$hookinfo['info'][] = '[memcacheMonitor] All servers responding.';
+	}
+}
+
+
+?>
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