/[cvs]/nfo/php/libs/org.netfrag.glib/DesignPattern/RemoteProxy.php
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revision 1.1 by joko, Mon Mar 3 22:06:46 2003 UTC revision 1.8 by joko, Mon Mar 10 22:31:56 2003 UTC
# Line 1  Line 1 
1  <?php  <?php
   
2  /**  /**
3     * This file contains the DesignPattern::RemoteProxy class
4     *
5     * @author Andreas Motl <andreas.motl@ilo.de>
6     * @package org.netfrag.glib
7     * @name DesignPattern::RemoteProxy
8     *
9     *
10     * <b>Cvs-Log:</b>
11     *
12     * <pre>
13   * -------------------------------------------------------------------------   * -------------------------------------------------------------------------
14   *    $Id$   *    $Id$
15   * -------------------------------------------------------------------------   * -------------------------------------------------------------------------
16   *    $Log$   *    $Log$
17     *    Revision 1.8  2003/03/10 22:31:56  joko
18     *    + fixed metadata for phpDocumentor
19     *
20     *    Revision 1.7  2003/03/09 15:51:44  joko
21     *    + additional metadata for Autodia
22     *
23     *    Revision 1.6  2003/03/05 17:28:43  joko
24     *    updated docu (phpDocumentor testing....)
25     *
26     *    Revision 1.5  2003/03/05 17:02:22  joko
27     *    updated docu (phpDocumentor testing....)
28     *
29     *    Revision 1.4  2003/03/05 16:32:19  joko
30     *    updated docu (phpDocumentor testing....)
31     *
32     *    Revision 1.3  2003/03/05 16:10:17  joko
33     *    updated docu (phpDocumentor testing....)
34     *
35     *    Revision 1.2  2003/03/05 12:14:02  joko
36     *    renamed method
37     *    constructor argument expansion
38     *
39   *    Revision 1.1  2003/03/03 22:06:46  joko   *    Revision 1.1  2003/03/03 22:06:46  joko
40   *    refactored from Data::Driver::Proxy   *    refactored from Data::Driver::Proxy
41   *   *
# Line 92  Line 123 
123   *    Revision 1.1  2002/10/09 00:51:39  cvsjoko   *    Revision 1.1  2002/10/09 00:51:39  cvsjoko
124   *    + new   *    + new
125   * -------------------------------------------------------------------------   * -------------------------------------------------------------------------
126     * </pre>
127     *
128   */   */
129    
130    
131    
132    
133  /**  /**
134     * Load required modules:
135   *   *
136   * Data::Driver::Proxy  --  Multiple stage data fetching and caching   */
137    loadModule('DesignPattern::Proxy');
138    
139    
140    /**
141     * DesignPattern::RemoteProxy  --  Multiple stage data fetching and caching
142   *   *
143   *   *
144   * This class (Data::Driver::Proxy) provides an abstract framework   * This class (DesignPattern::RemoteProxy) provides an abstract framework
145   * for loading/saving arbitrary data from/to data storages interfaced   * for loading/saving arbitrary data from/to data storages interfaced
146   * by storage *proxy*-drivers.   * by storage *proxy*-drivers.
147   * Don't mix these up with the concrete storage *handle*-drivers   * Don't mix these up with the concrete storage *handle*-drivers
# Line 108  Line 150 
150   * providing a more highlevel, consistent API making   * providing a more highlevel, consistent API making
151   * it easier for Data::Driver::Proxy to do its main work:   * it easier for Data::Driver::Proxy to do its main work:
152   *   *
153     * quote from: http://home.earthlink.net/~huston2/dp/proxy.html
154     * "A remote proxy provides a local representative for an
155     * object that resides in a different address space. This is
156     * what the "stub" code in RPC and CORBA provides."
157     *
158     *
159   * Multiple stage data fetching and caching:   * Multiple stage data fetching and caching:
160   *   *
161     * <pre>
162     *
163   * DATA, ...   * DATA, ...
164   *    ... also refered to as data, should be handled as   *    ... also refered to as data, should be handled as
165   *    something called data.   *    something called data.
# Line 152  Line 202 
202   *    o Data::Driver::PEAR::DB   *    o Data::Driver::PEAR::DB
203   *    x Data::Driver::PEAR::Tree (via Data::Lift)   *    x Data::Driver::PEAR::Tree (via Data::Lift)
204   *   *
205   */   * </pre>
   
 /**  
  * Todo:  
  *  x extend options to en-/disable caching via a) session and/or b) database  
  *    o make feature available via runtime setter-method to these options  
  *  o use PEAR::Cache for caching purposes!!!  
  *  o refactor database access: use PEAR for this! no more 'connectdb' here!!!  
  *  o make database connection more flexible to make possible  
  *      to have different (probably named) proxy databases (besides a "main database")  
  *  o rename this to Data::Proxy? or split into Data::Query, Data::Result and Data::Wrapper?  
206   *   *
207   */   *
208     * An attempt to implement some software design patterns
209  /**   * --- RemoteProxyPattern
210   * Load required modules:   *
211     * @link http://www.agcs.com/supportv2/techpapers/patterns/papers/tutnotes/sld017.htm
212     * @link http://home.earthlink.net/~huston2/dp/proxy.html
213     * @link http://wiki.cs.uiuc.edu/PatternStories/RemoteObject
214     * @link http://c2.com/cgi-bin/wiki?ProxyPattern
215     * @link http://c2.com/cgi-bin/wiki?LazyProxies
216     *
217     * @author Andreas Motl <andreas.motl@ilo.de>
218     * @link http://www.netfrag.org/~joko/
219     *
220     * @copyright (c) 2003 - All Rights reserved.
221     * @license GNU LGPL (GNU Lesser General Public License)
222     * @link http://www.gnu.org/licenses/lgpl.txt
223     *
224     * @package org.netfrag.glib
225     * @subpackage DesignPattern
226     * @name DesignPattern::RemoteProxy
227     *
228     *
229     * @todo extend options to en-/disable caching via a) session and/or b) database
230     *           make feature available via runtime setter-method to these options
231     * @todo PEAR::Cache for caching purposes!!!
232     * @todo refactor database access: use PEAR for this! no more 'connectdb' here!!!
233     * @todo make database connection more flexible to make possible
234     *           to have different (probably named) proxy databases (besides a "main database")
235     * @todo rename this to Data::Proxy? or split into Data::Query, Data::Result and Data::Wrapper?
236     * @todo refactor this to a "RemoteObject" class!!! (inheriting from DesignPattern::RemoteObject)
237     * @todo rename this to "DesignPattern::LazyRemoteProxy"???
238   *   *
239   */   */
 loadModule('DesignPattern::Proxy');  
   
240  class DesignPattern_RemoteProxy extends DesignPattern_Proxy {  class DesignPattern_RemoteProxy extends DesignPattern_Proxy {
241    
242    var $objectId;    var $objectId;
# Line 185  class DesignPattern_RemoteProxy extends Line 250  class DesignPattern_RemoteProxy extends
250      logp(get_class($this) . "->new()", PEAR_LOG_INFO);      logp(get_class($this) . "->new()", PEAR_LOG_INFO);
251      global $proxy;      global $proxy;
252    
253        // 2003-03-05 - modified constructor
254        // expand objectId
255        if (is_array($objectId)) {
256          $options = $objectId[1];
257          $objectId = $objectId[0];
258        }
259    
260      // trace      // trace
261        //print Dumper($objectId, $options);        //print Dumper($objectId, $options);
262    
# Line 193  class DesignPattern_RemoteProxy extends Line 265  class DesignPattern_RemoteProxy extends
265        $this->_init_caching();        $this->_init_caching();
266        $this->_init_load();        $this->_init_load();
267    
268        //print Dumper($this);
269    
270    }    }
271    
272    function _init_meta_options( $objectId="", $options = array() ) {    function _init_meta_options( $objectId="", $options = array() ) {
# Line 215  class DesignPattern_RemoteProxy extends Line 289  class DesignPattern_RemoteProxy extends
289        session_register_safe("proxy");        session_register_safe("proxy");
290      }        }  
291    
292        /**
293         * <!-- Autodia -->
294         * can do: (this is metadata supplied for Autodia, don't delete!)
295         *  $this->backend = new DataSource_Proxy_XMLRPC()
296         *
297         */
298    
299      if ($this->meta[remote]) {      if ($this->meta[remote]) {
300        //$this->backend = mkObject('Data::Driver::RPC::Remote', $this->meta[rpcinfo]);        //$this->backend = mkObject('Data::Driver::RPC::Remote', $this->meta[rpcinfo]);
301        $this->backend = mkObject('DataSource::Proxy::XMLRPC', $this->meta[rpcinfo]);        $this->backend = php::mkComponent('DataSource::Proxy::XMLRPC', $this->meta[rpcinfo]);
302      }      }
303    }    }
304    
# Line 275  class DesignPattern_RemoteProxy extends Line 356  class DesignPattern_RemoteProxy extends
356    }      }  
357    */    */
358    
359    function getAttributes() {    function getResult() {
360      if (!$this->meta[decoded]) {      if (!$this->meta[decoded]) {
361        $this->_decode();        $this->_decode();
362        $this->_saveState();        $this->_saveState();
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