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MDL-46552 session: add support for multiple servers in memcached session driver

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This commit is contained in:
Petr Skoda
2014-08-05 11:34:57 +12:00
parent d29fb4ac65
commit fcbf5cbb01
1 changed files with 42 additions and 13 deletions
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lib/classes/session/memcached.php
+42 -13
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@@ -137,12 +137,22 @@ class memcached extends handler {
return false;
}
$memcached = new \Memcached();
$memcached->addServers($this->servers);
$value = $memcached->get($this->prefix.$sid);
$memcached->quit();
// Go through the list of all servers because
// we do not know where the session handler put the
// data.
return ($value !== false);
foreach ($this->servers as $server) {
list($host, $port) = $server;
$memcached = new \Memcached();
$memcached->addServer($host, $port);
$value = $memcached->get($this->prefix . $sid);
$memcached->quit();
if ($value !== false) {
return true;
}
}
return false;
}
/**
@@ -155,19 +165,32 @@ class memcached extends handler {
return;
}
$memcached = new \Memcached();
$memcached->addServers($this->servers);
// Go through the list of all servers because
// we do not know where the session handler put the
// data.
$memcacheds = array();
foreach ($this->servers as $server) {
list($host, $port) = $server;
$memcached = new \Memcached();
$memcached->addServer($host, $port);
$memcacheds[] = $memcached;
}
// Note: this can be significantly improved by fetching keys from memcached,
// but we need to make sure we are not deleting somebody else's sessions.
$rs = $DB->get_recordset('sessions', array(), 'id DESC', 'id, sid');
foreach ($rs as $record) {
$memcached->delete($this->prefix.$record->sid);
foreach ($memcacheds as $memcached) {
$memcached->delete($this->prefix . $record->sid);
}
}
$rs->close();
$memcached->quit();
foreach ($memcacheds as $memcached) {
$memcached->quit();
}
}
/**
@@ -179,11 +202,17 @@ class memcached extends handler {
return;
}
$memcached = new \Memcached();
$memcached->addServers($this->servers);
$memcached->delete($this->prefix.$sid);
// Go through the list of all servers because
// we do not know where the session handler put the
// data.
$memcached->quit();
foreach ($this->servers as $server) {
list($host, $port) = $server;
$memcached = new \Memcached();
$memcached->addServer($host, $port);
$memcached->delete($this->prefix . $sid);
$memcached->quit();
}
}
}