/[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 1.7 by joko, Sun Mar 9 15:51:44 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     * @filesource
9     *
10     *
11     * <b>Cvs-Log:</b>
12     *
13     * <pre>
14   * -------------------------------------------------------------------------   * -------------------------------------------------------------------------
15   *    $Id$   *    $Id$
16   * -------------------------------------------------------------------------   * -------------------------------------------------------------------------
17   *    $Log$   *    $Log$
18     *    Revision 1.7  2003/03/09 15:51:44  joko
19     *    + additional metadata for Autodia
20     *
21     *    Revision 1.6  2003/03/05 17:28:43  joko
22     *    updated docu (phpDocumentor testing....)
23     *
24     *    Revision 1.5  2003/03/05 17:02:22  joko
25     *    updated docu (phpDocumentor testing....)
26     *
27     *    Revision 1.4  2003/03/05 16:32:19  joko
28     *    updated docu (phpDocumentor testing....)
29     *
30     *    Revision 1.3  2003/03/05 16:10:17  joko
31     *    updated docu (phpDocumentor testing....)
32     *
33     *    Revision 1.2  2003/03/05 12:14:02  joko
34     *    renamed method
35     *    constructor argument expansion
36     *
37   *    Revision 1.1  2003/03/03 22:06:46  joko   *    Revision 1.1  2003/03/03 22:06:46  joko
38   *    refactored from Data::Driver::Proxy   *    refactored from Data::Driver::Proxy
39   *   *
# Line 92  Line 121 
121   *    Revision 1.1  2002/10/09 00:51:39  cvsjoko   *    Revision 1.1  2002/10/09 00:51:39  cvsjoko
122   *    + new   *    + new
123   * -------------------------------------------------------------------------   * -------------------------------------------------------------------------
124     * </pre>
125     *
126   */   */
127    
128    
129    
130    
131  /**  /**
132     * Load required modules:
133   *   *
134   * Data::Driver::Proxy  --  Multiple stage data fetching and caching   */
135    loadModule('DesignPattern::Proxy');
136    
137    
138    /**
139     * DesignPattern::RemoteProxy  --  Multiple stage data fetching and caching
140   *   *
141   *   *
142   * This class (Data::Driver::Proxy) provides an abstract framework   * This class (DesignPattern::RemoteProxy) provides an abstract framework
143   * for loading/saving arbitrary data from/to data storages interfaced   * for loading/saving arbitrary data from/to data storages interfaced
144   * by storage *proxy*-drivers.   * by storage *proxy*-drivers.
145   * 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 148 
148   * providing a more highlevel, consistent API making   * providing a more highlevel, consistent API making
149   * it easier for Data::Driver::Proxy to do its main work:   * it easier for Data::Driver::Proxy to do its main work:
150   *   *
151     * quote from: http://home.earthlink.net/~huston2/dp/proxy.html
152     * "A remote proxy provides a local representative for an
153     * object that resides in a different address space. This is
154     * what the "stub" code in RPC and CORBA provides."
155     *
156     *
157   * Multiple stage data fetching and caching:   * Multiple stage data fetching and caching:
158   *   *
159     * <pre>
160     *
161   * DATA, ...   * DATA, ...
162   *    ... also refered to as data, should be handled as   *    ... also refered to as data, should be handled as
163   *    something called data.   *    something called data.
# Line 152  Line 200 
200   *    o Data::Driver::PEAR::DB   *    o Data::Driver::PEAR::DB
201   *    x Data::Driver::PEAR::Tree (via Data::Lift)   *    x Data::Driver::PEAR::Tree (via Data::Lift)
202   *   *
203   */   * </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?  
204   *   *
205   */   *
206     * An attempt to implement some software design patterns
207  /**   * --- RemoteProxyPattern
208   * Load required modules:   *
209     * @link http://www.agcs.com/supportv2/techpapers/patterns/papers/tutnotes/sld017.htm
210     * @link http://home.earthlink.net/~huston2/dp/proxy.html
211     * @link http://wiki.cs.uiuc.edu/PatternStories/RemoteObject
212     * @link http://c2.com/cgi-bin/wiki?ProxyPattern
213     * @link http://c2.com/cgi-bin/wiki?LazyProxies
214     *
215     * @author Andreas Motl <andreas.motl@ilo.de>
216     * @link http://www.netfrag.org/~joko/
217     *
218     * @copyright (c) 2003 - All Rights reserved.
219     * @license GNU LGPL (GNU Lesser General Public License)
220     * @link http://www.gnu.org/licenses/lgpl.txt
221     *
222     * @package org.netfrag.glib
223     * @subpackage DesignPattern
224     * @name DesignPattern::RemoteProxy
225     *
226     *
227     * @todo extend options to en-/disable caching via a) session and/or b) database
228     *           make feature available via runtime setter-method to these options
229     * @todo PEAR::Cache for caching purposes!!!
230     * @todo refactor database access: use PEAR for this! no more 'connectdb' here!!!
231     * @todo make database connection more flexible to make possible
232     *           to have different (probably named) proxy databases (besides a "main database")
233     * @todo rename this to Data::Proxy? or split into Data::Query, Data::Result and Data::Wrapper?
234     * @todo refactor this to a "RemoteObject" class!!! (inheriting from DesignPattern::RemoteObject)
235     * @todo rename this to "DesignPattern::LazyRemoteProxy"???
236   *   *
237   */   */
 loadModule('DesignPattern::Proxy');  
   
238  class DesignPattern_RemoteProxy extends DesignPattern_Proxy {  class DesignPattern_RemoteProxy extends DesignPattern_Proxy {
239    
240    var $objectId;    var $objectId;
# Line 185  class DesignPattern_RemoteProxy extends Line 248  class DesignPattern_RemoteProxy extends
248      logp(get_class($this) . "->new()", PEAR_LOG_INFO);      logp(get_class($this) . "->new()", PEAR_LOG_INFO);
249      global $proxy;      global $proxy;
250    
251        // 2003-03-05 - modified constructor
252        // expand objectId
253        if (is_array($objectId)) {
254          $options = $objectId[1];
255          $objectId = $objectId[0];
256        }
257    
258      // trace      // trace
259        //print Dumper($objectId, $options);        //print Dumper($objectId, $options);
260    
# Line 193  class DesignPattern_RemoteProxy extends Line 263  class DesignPattern_RemoteProxy extends
263        $this->_init_caching();        $this->_init_caching();
264        $this->_init_load();        $this->_init_load();
265    
266        //print Dumper($this);
267    
268    }    }
269    
270    function _init_meta_options( $objectId="", $options = array() ) {    function _init_meta_options( $objectId="", $options = array() ) {
# Line 215  class DesignPattern_RemoteProxy extends Line 287  class DesignPattern_RemoteProxy extends
287        session_register_safe("proxy");        session_register_safe("proxy");
288      }        }  
289    
290        /**
291         * <!-- Autodia -->
292         * can do: (this is metadata supplied for Autodia, don't delete!)
293         *  $this->backend = new DataSource_Proxy_XMLRPC()
294         *
295         */
296    
297      if ($this->meta[remote]) {      if ($this->meta[remote]) {
298        //$this->backend = mkObject('Data::Driver::RPC::Remote', $this->meta[rpcinfo]);        //$this->backend = mkObject('Data::Driver::RPC::Remote', $this->meta[rpcinfo]);
299        $this->backend = mkObject('DataSource::Proxy::XMLRPC', $this->meta[rpcinfo]);        $this->backend = php::mkComponent('DataSource::Proxy::XMLRPC', $this->meta[rpcinfo]);
300      }      }
301    }    }
302    
# Line 275  class DesignPattern_RemoteProxy extends Line 354  class DesignPattern_RemoteProxy extends
354    }      }  
355    */    */
356    
357    function getAttributes() {    function getResult() {
358      if (!$this->meta[decoded]) {      if (!$this->meta[decoded]) {
359        $this->_decode();        $this->_decode();
360        $this->_saveState();        $this->_saveState();
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