Fri, 10 Apr 2026 05:02:43 +0000 https://bugs.horde.org/ticket/9282 Using SQL sessionhandler and SQL cache causes infinite recursion Partial backtrace: 1 0.0016 795432 {main}( ) ../config.php:0 2 0.1231 2465768 Horde_Registry::appInit( ) ../config.php:12 3 0.1231 2468832 Horde_Registry->__construct( ) ../Registry.php:207 4 0.1495 3447712 Horde_Registry->setupSessionHandler( ) ../Registry.php:415 5 0.1496 3449360 Horde_Injector->createInstance( ) ../Registry.php:1657 6 0.1507 3488920 Horde_Core_Binder_SessionHandler->create( ) ../Injector.php:261 7 0.1515 3544704 Horde_Core_Factory_Db->getDb( ) ../SessionHandler.php:23 8 0.1516 3546296 Horde_Core_Factory_Db->getDb( ) ../Db.php:86 9 0.1516 3547576 Horde_Core_Factory_Db->_createDb( ) ../Db.php:91 10 0.1586 4322088 Horde_Injector->getInstance( ) ../Db.php:155 11 0.1586 4322088 Horde_Injector->createInstance( ) ../Injector.php:297 12 0.1595 4329016 Horde_Core_Binder_Cache->create( ) ../Injector.php:261 13 0.1603 4362464 Horde_Core_Factory_Cache->getCache( ) ../Cache.php:11 14 0.1734 4603584 Horde_Core_Factory_Db->getDb( ) ../Cache.php:94 15 0.1735 4605000 Horde_Core_Factory_Db->getDb( ) ../Db.php:86 16 0.1735 4606280 Horde_Core_Factory_Db->_createDb( ) ../Db.php:91 17 0.1749 4633496 Horde_Injector->getInstance( ) ../Db.php:155 18 0.1749 4633496 Horde_Injector->createInstance( ) ../Injector.php:297 19 0.1750 4633544 Horde_Core_Binder_Cache->create( ) ../Injector.php:261 20 0.1750 4634056 Horde_Core_Factory_Cache->getCache( ) ../Cache.php:11 21 0.1750 4635968 Horde_Core_Factory_Db->getDb( ) ../Cache.php:94 22 0.1751 4637384 Horde_Core_Factory_Db->getDb( ) ../Db.php:86 23 0.1751 4638664 Horde_Core_Factory_Db->_createDb( ) Sat, 02 Oct 2010 20:27:05 +0000 https://bugs.horde.org/ticket/9282#t60255 I think this has come up before (possibly within Horde_Db itself). The solution is to add the logger to the object after creating it via a setLogger() call instead of in the constructor. Tue, 05 Oct 2010 17:05:08 +0000 https://bugs.horde.org/ticket/9282#t60272 Never mind... the cyclic dependency is that the SessionHandler driver is using Db storage -> the Db is creating a cache object to store things like Db schema info -> the cache is stored in the Db itself. Looks like we need some way to pass the cache object to the Db before it is instantiated. I'm guessing this might be a place to use injector/factories(?) Tue, 05 Oct 2010 17:34:48 +0000 https://bugs.horde.org/ticket/9282#t60273 Spent some time on this tonight and I'm leaning toward the problem being that logger and cache shouldn't be getting a full-fledged Horde_Db_Adapter, or that Horde_Db_Adapter shouldn't include logging and caching, but a higher-level object should. From the comments at http://misko.hevery.com/2008/08/01/circular-dependency-in-constructors-and-dependency-injection/: @Peter, here is how I would attack you problem. class Database() implements DB; class Logger(Database db); class LoggingDatabase(Logger log, Database db) implements DB; DB rawDatabase = new Database(); Logger log = new Logger(rowDatabase); DB dbForTheRestoOfApplication = new LoggingDatabase(log, rowDatabase); There you go. LoggingDatabase logs the commands as they go by and than delegate it on a class of the same interface. This is know as chain of responsibility and it is my favorite design pattern. ... so, that seems clean, but will take a little work. Sun, 16 Jan 2011 04:26:45 +0000 https://bugs.horde.org/ticket/9282#t61424 What about the idea I floated on dev@ about a 'queued' Logger instance? On dev@ I was discussing the use of a queued logger during the time before the log object itself was available (e.g. before the Horde config could be parsed). But a queued logger could likewise be used in this instance - log requests to the logger are queued until the logger can determine that the backend (the DB object) is fully initialized. Tue, 18 Jan 2011 05:57:17 +0000 https://bugs.horde.org/ticket/9282#t61447 I don't think that'd work ultimately either. Horde_Db logging queries when the logger is configured to log using Horde_Db is always going to create an infinite loop, even if we get past the object construction phase. Mon, 24 Jan 2011 01:34:35 +0000 https://bugs.horde.org/ticket/9282#t61553 Changes have been made in Git for this ticket: Bug #9282: When creating Horde_Db objects, register them with a child injector before creating any dependencies that could in turn want a Horde_Db dependency. http://git.horde.org/horde-git/-/commit/fa4fbb47bf73abd59ae6d690fb25594576acfe16 Mon, 24 Jan 2011 03:34:40 +0000 https://bugs.horde.org/ticket/9282#t61554 Ultimately, I way overthought this. Works for me now. Mon, 24 Jan 2011 03:36:23 +0000 https://bugs.horde.org/ticket/9282#t61555