Make LDAP cache engine configurable via ldap_cache and ldap_cache_ttl options

CHANGELOG

@@ -1,6 +1,7 @@
 CHANGELOG Roundcube Webmail
 ===========================
 
+- Make LDAP cache engine configurable via ldap_cache and ldap_cache_ttl options
 - Fix legacy options handling
 - Fix "duplicate entry" errors on inserts to imap cache tables (#1489146)
 - Fix so bounces addresses in Sender headers are skipped on Reply-All (#1489011)

config/main.inc.php.dist

@@ -128,6 +128,9 @@ $rcmail_config['imap_cache'] = null;
 // Enables messages cache. Only 'db' cache is supported.
 $rcmail_config['messages_cache'] = false;
 
+// lifetime of message cache
+// possible units: s, m, h, d, w
+$rcmail_config['message_cache_lifetime'] = '10d';
 
 // ----------------------------------
 // SMTP
@@ -170,12 +173,22 @@ $rcmail_config['smtp_auth_pw'] = null;
 // SMTP HELO host 
 // Hostname to give to the remote server for SMTP 'HELO' or 'EHLO' messages 
 // Leave this blank and you will get the server variable 'server_name' or 
-// localhost if that isn't defined. 
+// localhost if that isn't defined.
 $rcmail_config['smtp_helo_host'] = '';
 
 // SMTP connection timeout, in seconds. Default: 0 (no limit)
 $rcmail_config['smtp_timeout'] = 0;
 
+// ----------------------------------
+// LDAP
+// ----------------------------------
+
+// Type of LDAP cache. Supported values: 'db', 'apc' and 'memcache'.
+$rcmail_config['ldap_cache'] = 'db';
+
+// Lifetime of LDAP cache. Possible units: s, m, h, d, w
+$rcmail_config['ldap_cache_ttl'] = '10m';
+
 // ----------------------------------
 // SYSTEM
 // ----------------------------------
@@ -210,10 +223,6 @@ $rcmail_config['log_dir'] = 'logs/';
 // use this folder to store temp files (must be writeable for apache user)
 $rcmail_config['temp_dir'] = 'temp/';
 
-// lifetime of message cache
-// possible units: s, m, h, d, w
-$rcmail_config['message_cache_lifetime'] = '10d';
-
 // enforce connections over https
 // with this option enabled, all non-secure connections will be redirected.
 // set the port for the ssl connection as value of this option if it differs from the default 443

program/lib/Roundcube/rcube_ldap.php

@@ -185,8 +185,12 @@ class rcube_ldap extends rcube_addressbook
         $this->mail_domain = $mail_domain;
 
         // initialize cache
-        $rcube = rcube::get_instance();
-        $this->cache = $rcube->get_cache('LDAP.' . asciiwords($this->prop['name']), 'db', 600);
+        $rcube      = rcube::get_instance();
+        $cache_type = $rcube->config->get('ldap_cache', 'db');
+        $cache_ttl  = $rcube->config->get('ldap_cache_ttl', '10m');
+        $cache_name = 'LDAP.' . asciiwords($this->prop['name']);
+
+        $this->cache = $rcube->get_cache($cache_name, $cache_type, $cache_ttl);
 
         $this->_connect();
     }