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<? |
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## ------------------------------------------------------------------------------------- |
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## $Id: ProxyObject.php,v 1.1 2002/12/01 17:23:58 joko Exp $ |
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## ------------------------------------------------------------------------------------- |
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## $Log: ProxyObject.php,v $ |
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## Revision 1.1 2002/12/01 17:23:58 joko |
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## + initial check-in |
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## |
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## Revision 1.11 2002/11/12 06:05:58 cvsjoko |
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## + renamed class: Text_Encode -> TextEncode |
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## |
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## Revision 1.10 2002/10/29 19:15:33 cvsjoko |
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## - moved utf8/iso-conversion to lib/utils/Text_Encode.php |
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## |
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## Revision 1.9 2002/10/26 12:32:36 cvsjoko |
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## - removed debugging via "print" |
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## + added generic logging via PEAR::Log |
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## |
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## Revision 1.8 2002/10/22 09:51:38 cvsmax |
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## + moved semi-method 'createBackend' to method $site->user->create at User.class.php |
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## |
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## Revision 1.7 2002/10/21 18:27:09 cvsjoko |
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## - manually disabled any form of caching |
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## |
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## Revision 1.6 2002/10/17 03:48:47 cvsmax |
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## + new |
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## + function _createBackend create new Backend |
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## + function _create api-create |
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## |
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## Revision 1.5 2002/10/16 03:37:54 cvsjoko |
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## + bugfix: wrong comparison in restriction to save to array |
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## |
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## Revision 1.4 2002/10/10 03:04:23 cvsjoko |
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## + no debug-output |
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## |
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## Revision 1.3 2002/10/10 03:03:27 cvsjoko |
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## + bugfix: save object to cache only if payload from backend isn't empty |
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## |
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## Revision 1.2 2002/10/10 02:40:06 cvsjoko |
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## + new level of data-caching (session and persistant) |
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## + function _loadState loads data from session |
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## + function _saveState saves data to session |
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## + function save api-save (session & backend) |
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## + function _commit saves data to backend |
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## + handy utils |
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## + function _setAttributes |
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## + function flushState |
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## |
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## Revision 1.1 2002/10/09 00:51:39 cvsjoko |
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## + new |
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## ------------------------------------------------------------------------------------- |
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|
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class ProxyObject { |
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|
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var $objectId; |
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// purpose ... |
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var $meta; |
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var $payload; |
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var $attributes; |
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var $backend; |
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|
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function ProxyObject($objectId = "") { |
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session_register_safe("proxy"); |
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$this->backend = new Remote; |
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$this->_init($objectId); |
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} |
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|
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function _init($objectId="") { |
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if ($objectId) { |
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$this->objectId = $objectId; |
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$this->load(); |
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//$this->_saveCache(); |
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} |
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} |
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|
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function load() { |
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if (!$this->_loadState()) { |
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if (!$this->_loadCache()) { |
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$this->_loadBackend(); |
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} |
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} |
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} |
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|
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function save($data, $type) { |
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$this->_setAttributes($data); |
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$this->_saveState(); |
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if ($type == 'commit') { |
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$this->_commit(); |
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} |
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if ($type == 'create') { |
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$this->_create(); |
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} |
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} |
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|
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function flush() { |
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$this->flushState(); |
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$this->flushCache(); |
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} |
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|
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function _commit() { |
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$this->_saveBackend($this->attributes); |
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$this->flushState(); |
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$this->flushCache(); |
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} |
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|
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|
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// TODO: make this work |
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/* |
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function _create() { |
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$this->_createBackend($this->attributes); |
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$this->flushState(); |
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$this->flushCache(); |
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} |
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*/ |
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|
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function getAttributes() { |
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if (!$this->meta[decoded]) { |
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$this->_decode(); |
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$this->_saveState(); |
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} |
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return $this->attributes; |
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} |
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|
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function _setAttributes($data) { |
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$this->attributes = $data; |
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} |
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|
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function flushCache() { |
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connectdb(); |
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$sql = "DELETE FROM f_proxy WHERE oid='$this->objectId'"; |
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send_sql($sql); |
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} |
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|
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function flushState() { |
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global $proxy; |
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unset($proxy[$this->objectId]); |
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} |
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|
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function _loadState() { |
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global $proxy; |
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logp(get_class($this) . "->_loadState()", LOG_DEBUG); |
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if ($this->attributes = $proxy[$this->objectId]) { |
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//print "_loadState:" . dumpVar($this->attributes); |
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$this->meta[decoded] = 1; |
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// TODO: make a parameter from this (0 deactivates session-layer) |
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return 0; |
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} |
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} |
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|
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function _saveState() { |
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global $proxy; |
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logp(get_class($this) . "->_saveState()", LOG_DEBUG); |
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$proxy[$this->objectId] = $this->attributes; |
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//print "_saveState: " . dumpVar($this->attributes); |
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// TODO: throw exception-message back to user if operation fails |
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} |
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|
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function _loadCache() { |
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logp(get_class($this) . "->_loadCache()", LOG_DEBUG); |
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connectdb(); |
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$sql = "SELECT payload FROM f_proxy WHERE oid='$this->objectId'"; |
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if ($res = send_sql($sql)) { |
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$row = mysql_fetch_array($res, MYSQL_ASSOC); |
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if ($row) { |
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$this->payload = $row[payload]; |
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// TODO: make a parameter from this (0 deactivates mysqldb-layer) |
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return 0; |
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} |
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} |
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} |
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|
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function _saveCache() { |
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logp(get_class($this) . "->_saveCache()", LOG_DEBUG); |
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connectdb(); |
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if ($this->payload) { |
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//$sql = "INSERT INTO f_proxy SET payload='$this->payload' WHERE oid='$this->objectId'"; |
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$sql = "INSERT INTO f_proxy SET oid='$this->objectId', payload='$this->payload'"; |
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if (!send_sql($sql)) { |
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$sql = "UPDATE f_proxy SET payload='$this->payload' WHERE oid='$this->objectId'"; |
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send_sql($sql); |
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} |
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} |
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} |
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|
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function _loadBackend() { |
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logp(get_class($this) . "->_loadBackend()", LOG_DEBUG); |
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// TODO: test backend for reachability first (eventually cache this information and "reset" it by another party) |
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if ($result = $this->backend->call('getObject', $this->objectId)) { |
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//print "result: " . dumpVar($result) . "<br>"; |
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if (count($result) == 0) { return; } |
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$encoder = new TextEncode($result); |
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$encoder->toISO(); |
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if ($_GET[debug]) { |
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print dumpVar($result); |
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} |
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$this->payload = serialize($result); |
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$this->_saveCache(); |
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} |
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} |
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|
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function _saveBackend($result) { |
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logp(get_class($this) . "->_saveBackend()", LOG_DEBUG); |
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$encoder = new TextEncode($result); |
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$encoder->toUTF8(); |
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$response = $this->backend->send('saveObject', array('oid' => $this->objectId, 'data' => $result) ); |
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} |
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|
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function _decode() { |
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// fill attributes-hashtable from message-hashtable |
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if (!$this->payload) { return; } |
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//if ($this->attributes = $backend->decodeData($this->payload)) { |
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if ($this->attributes = unserialize($this->payload)) { |
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$this->meta[decoded] = 1; |
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} |
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} |
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|
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|
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} |
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|
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?> |
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