/[cvs]/nfo/php/libs/org.netfrag.glib/DesignPattern/RemoteProxy.php
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revision 1.3 by joko, Wed Mar 5 16:10:17 2003 UTC revision 1.10 by joko, Fri Mar 28 03:05:54 2003 UTC
# Line 6  Line 6 
6   * @package org.netfrag.glib   * @package org.netfrag.glib
7   * @name DesignPattern::RemoteProxy   * @name DesignPattern::RemoteProxy
8   *   *
9     *
10   */   */
11    
12    
13  /**  /**
14     * <b>Cvs-Log:</b>
15     *
16     * <pre>
17   * -------------------------------------------------------------------------   * -------------------------------------------------------------------------
18   *    $Id$   *    $Id$
19   * -------------------------------------------------------------------------   * -------------------------------------------------------------------------
20   *    $Log$   *    $Log$
21     *    Revision 1.10  2003/03/28 03:05:54  joko
22     *    more fancy debugging-output
23     *
24     *    Revision 1.9  2003/03/10 23:05:25  joko
25     *    + fixed metadata for phpDocumentor
26     *
27     *    Revision 1.8  2003/03/10 22:31:56  joko
28     *    + fixed metadata for phpDocumentor
29     *
30     *    Revision 1.7  2003/03/09 15:51:44  joko
31     *    + additional metadata for Autodia
32     *
33     *    Revision 1.6  2003/03/05 17:28:43  joko
34     *    updated docu (phpDocumentor testing....)
35     *
36     *    Revision 1.5  2003/03/05 17:02:22  joko
37     *    updated docu (phpDocumentor testing....)
38     *
39     *    Revision 1.4  2003/03/05 16:32:19  joko
40     *    updated docu (phpDocumentor testing....)
41     *
42   *    Revision 1.3  2003/03/05 16:10:17  joko   *    Revision 1.3  2003/03/05 16:10:17  joko
43   *    updated docu (phpDocumentor testing....)   *    updated docu (phpDocumentor testing....)
44   *   *
# Line 107  Line 133 
133   *    Revision 1.1  2002/10/09 00:51:39  cvsjoko   *    Revision 1.1  2002/10/09 00:51:39  cvsjoko
134   *    + new   *    + new
135   * -------------------------------------------------------------------------   * -------------------------------------------------------------------------
136     * </pre>
137     *
138     */
139    
140    
141    
142    
143    /**
144     * Load required modules:
145     *
146   */   */
147    loadModule('DesignPattern::Proxy');
148    
149    
150  /**  /**
151   * Data::Driver::Proxy  --  Multiple stage data fetching and caching   * DesignPattern::RemoteProxy  --  Multiple stage data fetching and caching
152   *   *
153   *   *
154   * This class (Data::Driver::Proxy) provides an abstract framework   * This class (DesignPattern::RemoteProxy) provides an abstract framework
155   * for loading/saving arbitrary data from/to data storages interfaced   * for loading/saving arbitrary data from/to data storages interfaced
156   * by storage *proxy*-drivers.   * by storage *proxy*-drivers.
157   * Don't mix these up with the concrete storage *handle*-drivers   * Don't mix these up with the concrete storage *handle*-drivers
# Line 122  Line 160 
160   * providing a more highlevel, consistent API making   * providing a more highlevel, consistent API making
161   * it easier for Data::Driver::Proxy to do its main work:   * it easier for Data::Driver::Proxy to do its main work:
162   *   *
163     * quote from: http://home.earthlink.net/~huston2/dp/proxy.html
164     * "A remote proxy provides a local representative for an
165     * object that resides in a different address space. This is
166     * what the "stub" code in RPC and CORBA provides."
167     *
168     *
169   * Multiple stage data fetching and caching:   * Multiple stage data fetching and caching:
170   *   *
171     * <pre>
172     *
173   * DATA, ...   * DATA, ...
174   *    ... also refered to as data, should be handled as   *    ... also refered to as data, should be handled as
175   *    something called data.   *    something called data.
# Line 166  Line 212 
212   *    o Data::Driver::PEAR::DB   *    o Data::Driver::PEAR::DB
213   *    x Data::Driver::PEAR::Tree (via Data::Lift)   *    x Data::Driver::PEAR::Tree (via Data::Lift)
214   *   *
215   */   * </pre>
216     *
217  /**   *
218   * An attempt to implement some software design patterns...   * An attempt to implement some software design patterns
219   * --- RemoteProxyPattern   * --- RemoteProxyPattern
220   *   *
221     * @link http://www.agcs.com/supportv2/techpapers/patterns/papers/tutnotes/sld017.htm
222     * @link http://home.earthlink.net/~huston2/dp/proxy.html
223     * @link http://wiki.cs.uiuc.edu/PatternStories/RemoteObject
224   * @link http://c2.com/cgi-bin/wiki?ProxyPattern   * @link http://c2.com/cgi-bin/wiki?ProxyPattern
225     * @link http://c2.com/cgi-bin/wiki?LazyProxies
226   *   *
227   * @author Andreas Motl <andreas.motl@ilo.de>   * @author Andreas Motl <andreas.motl@ilo.de>
228   * @link http://www.netfrag.org/~joko/   * @link http://www.netfrag.org/~joko/
# Line 182  Line 232 
232   * @link http://www.gnu.org/licenses/lgpl.txt   * @link http://www.gnu.org/licenses/lgpl.txt
233   *   *
234   * @package org.netfrag.glib   * @package org.netfrag.glib
235     * @subpackage DesignPattern
236   * @name DesignPattern::RemoteProxy   * @name DesignPattern::RemoteProxy
237   *   *
  */  
   
 /**  
  * @todo  
  * <pre>  
  *  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?  
  * </pre>  
238   *   *
239   */   * @todo extend options to en-/disable caching via a) session and/or b) database
240     *           make feature available via runtime setter-method to these options
241  /**   * @todo PEAR::Cache for caching purposes!!!
242   * Load required modules:   * @todo refactor database access: use PEAR for this! no more 'connectdb' here!!!
243     * @todo make database connection more flexible to make possible
244     *           to have different (probably named) proxy databases (besides a "main database")
245     * @todo rename this to Data::Proxy? or split into Data::Query, Data::Result and Data::Wrapper?
246     * @todo refactor this to a "RemoteObject" class!!! (inheriting from DesignPattern::RemoteObject)
247     * @todo rename this to "DesignPattern::LazyRemoteProxy"???
248   *   *
249   */   */
 loadModule('DesignPattern::Proxy');  
   
250  class DesignPattern_RemoteProxy extends DesignPattern_Proxy {  class DesignPattern_RemoteProxy extends DesignPattern_Proxy {
251    
252    var $objectId;    var $objectId;
# Line 258  class DesignPattern_RemoteProxy extends Line 299  class DesignPattern_RemoteProxy extends
299        session_register_safe("proxy");        session_register_safe("proxy");
300      }        }  
301    
302        /**
303         * <!-- Autodia -->
304         * can do: (this is metadata supplied for Autodia, don't delete!)
305         *  $this->backend = new DataSource_Proxy_XMLRPC()
306         *
307         */
308    
309      if ($this->meta[remote]) {      if ($this->meta[remote]) {
310        //$this->backend = mkObject('Data::Driver::RPC::Remote', $this->meta[rpcinfo]);        //$this->backend = mkObject('Data::Driver::RPC::Remote', $this->meta[rpcinfo]);
311        $this->backend = php::mkComponent('DataSource::Proxy::XMLRPC', $this->meta[rpcinfo]);        $this->backend = php::mkComponent('DataSource::Proxy::XMLRPC', $this->meta[rpcinfo]);
# Line 431  class DesignPattern_RemoteProxy extends Line 479  class DesignPattern_RemoteProxy extends
479            logp(get_class($this) . "->_loadRemote: argument 'guid' requires 'classname'", PEAR_LOG_WARNING);            logp(get_class($this) . "->_loadRemote: argument 'guid' requires 'classname'", PEAR_LOG_WARNING);
480            return;            return;
481          }          }
482            logp(get_class($this) . "->_loadRemote: getObjectByGuid", PEAR_LOG_DEBUG);
483          $args = array( guid => $this->objectId, classname => $this->meta[classname] );          $args = array( guid => $this->objectId, classname => $this->meta[classname] );
484          $result = $this->backend->send('getObjectByGuid', $args );          $result = $this->backend->send('getObjectByGuid', $args );
485    
# Line 439  class DesignPattern_RemoteProxy extends Line 488  class DesignPattern_RemoteProxy extends
488            logp(get_class($this) . "->_loadRemote: argument 'oid' requires valid objectId", PEAR_LOG_WARNING);            logp(get_class($this) . "->_loadRemote: argument 'oid' requires valid objectId", PEAR_LOG_WARNING);
489            return;            return;
490          }          }
491            logp(get_class($this) . "->_loadRemote: getObject", PEAR_LOG_DEBUG);
492          $result = $this->backend->send('getObject', $this->objectId);          $result = $this->backend->send('getObject', $this->objectId);
493    
494        } elseif ($this->meta[key]) {        } elseif ($this->meta[key]) {
# Line 452  class DesignPattern_RemoteProxy extends Line 502  class DesignPattern_RemoteProxy extends
502            return;            return;
503          }          }
504          */          */
505            //logp(get_class($this) . "->_loadRemote: $this->meta[command](" . join(' ', $this->meta[query]) . ")", PEAR_LOG_DEBUG);
506            //print Dumper(array($this->meta[command], $this->meta[query]));
507          $result = $this->backend->send($this->meta[command], $this->meta[query]);          $result = $this->backend->send($this->meta[command], $this->meta[query]);
508                    
509        }        }
510    
511        //print "result: " . dumpVar($result) . "<br>";
512    
513        $status = $this->backend->getStatus();
514        //print Dumper($status);
515        
516        $style = html_style("text/css", '.caption { color: yellow }');
517            
518      if ($result) {      $statusbox = html_div();
519        //print "result: " . dumpVar($result) . "<br>";      $statusbox->set_style('background: #558856; border: 2px black groove; width:640px; padding:10px; margin:40px;');
520        if (count($result) == 0) { return; }      $statusbox->add( html_b("Connected:"), $status[connected], html_br() );
521        $statusbox->add( html_span('caption', "Connected:"), $status[connected], html_br() );
522        foreach ($status[errors] as $error) {
523          $statusbox->add( html_span('caption', "Error[$error[code]]:"), $error[message], html_br() );
524        }
525        
526        if (is_array($result)) {
527          $good = 1;
528        } else {
529          $message = get_class($this) . "->_loadRemote: Error while trying to talk to remote side. Please check wire, socket or api.";
530          $statusbox->add( $message, html_br() );
531          logp($message, PEAR_LOG_CRIT);
532        }
533    
534        if ($good && sizeof($result)) {
535                
536        // FIXME: this is dangerous!        // FIXME: this is dangerous!
537        if ($_GET[debug]) {        if ($_GET[debug]) {
# Line 473  class DesignPattern_RemoteProxy extends Line 544  class DesignPattern_RemoteProxy extends
544        $this->_saveProxy();        $this->_saveProxy();
545        //print "oid: $this->objectId<br>";        //print "oid: $this->objectId<br>";
546        $this->flushState();        $this->flushState();
547        
548      } else {      } else {
549        //print "Error in _loadRemote!!!<br>";        print $style->render();
550        logp(get_class($this) . "->_loadRemote: error while trying to talk to remote side", PEAR_LOG_CRIT);        print $statusbox->render();
551        
552      }      }
553            
554    }    }
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