org.netfrag.glib/DesignPattern/RemoteProxy.php

<?php

/**
 * -------------------------------------------------------------------------
 *    $Id: RemoteProxy.php,v 1.1 2003/03/03 22:06:46 joko Exp $
 * -------------------------------------------------------------------------
 *    $Log: RemoteProxy.php,v $
 *    Revision 1.1  2003/03/03 22:06:46  joko
 *    refactored from Data::Driver::Proxy
 *
 *    Revision 1.3  2003/03/01 04:56:38  joko
 *    new comment style for large blocks - stolen from phpHtmlLib
 *    commit-log encapsulated into such a block
 *    introduced some documentation
 *    refactored todo (now also inside a stylish block)
 *
 *    Revision 1.2  2003/02/13 21:48:09  joko
 *    + caching mechanisms more configurable now
 *
 *    Revision 1.1  2003/02/09 17:23:21  joko
 *    + refactored from flib/Application/RPC/ProxyObject.php
 *
 *    Revision 1.7  2003/02/03 03:31:38  jonen
 *    - moved '$encoder->toISO()' to 'Remote.php'
 *
 *    Revision 1.6  2002/12/22 13:26:20  jonen
 *    + added support of tangram independent id (e.g. Data::UUID) toggled by option at conrtuctor
 *
 *    Revision 1.5  2002/12/18 22:36:49  jonen
 *    + added support to get remote objects via backend via 'guid'
 *    + renamed '_loadBackend' to '_loadRemote'
 *    + constructor now accepts additional options:
 *      + remote: try to get object via '_loadRemote' ...
 *      + oid: use the given identifier as an 'oid' when doing '_loadRemote'
 *      + guid: use the given identifier as a 'guid' when doing '_loadRemote'
 *
 *    Revision 1.4  2002/12/12 02:46:31  joko
 *    + state (session) gets flushed when data was successfully loaded from remote side
 *    + fixed _loadBackend
 *    + fixed flushState
 *
 *    Revision 1.3  2002/12/06 04:12:54  joko
 *    + replaced 'xyzCache' through 'xyzProxy'
 *    + function store(...)
 *
 *    Revision 1.2  2002/12/05 21:44:09  joko
 *    + debugging
 *
 *    Revision 1.1  2002/12/01 17:23:58  joko
 *    + initial check-in
 *
 *    Revision 1.11  2002/11/12 06:05:58  cvsjoko
 *    + renamed class: Text_Encode -> TextEncode
 *
 *    Revision 1.10  2002/10/29 19:15:33  cvsjoko
 *    - moved utf8/iso-conversion to lib/utils/Text_Encode.php
 *
 *    Revision 1.9  2002/10/26 12:32:36  cvsjoko
 *    - removed debugging via "print"
 *    + added generic logging via PEAR::Log
 *
 *    Revision 1.8  2002/10/22 09:51:38  cvsmax
 *    + moved semi-method 'createBackend' to method $site->user->create at User.class.php
 *
 *    Revision 1.7  2002/10/21 18:27:09  cvsjoko
 *    - manually disabled any form of caching
 *
 *    Revision 1.6  2002/10/17 03:48:47  cvsmax
 *    + new
 *       + function _createBackend      create new Backend
 *       + function _create             api-create
 *
 *    Revision 1.5  2002/10/16 03:37:54  cvsjoko
 *    + bugfix: wrong comparison in restriction to save to array
 *
 *    Revision 1.4  2002/10/10 03:04:23  cvsjoko
 *    + no debug-output
 *
 *    Revision 1.3  2002/10/10 03:03:27  cvsjoko
 *    + bugfix: save object to cache only if payload from backend isn't empty
 *
 *    Revision 1.2  2002/10/10 02:40:06  cvsjoko
 *    + new level of data-caching (session and persistant)
 *        + function _loadState loads data from session
 *        + function _saveState saves data to session
 *        + function save               api-save (session & backend)
 *        + function _commit    saves data to backend
 *    + handy utils
 *        + function _setAttributes
 *        + function flushState
 *
 *    Revision 1.1  2002/10/09 00:51:39  cvsjoko
 *    + new
 * -------------------------------------------------------------------------
 */

/**
 *
 * Data::Driver::Proxy  --  Multiple stage data fetching and caching
 *
 *
 * This class (Data::Driver::Proxy) provides an abstract framework 
 * for loading/saving arbitrary data from/to data storages interfaced 
 * by storage *proxy*-drivers.
 * Don't mix these up with the concrete storage *handle*-drivers 
 * doing the lowlevel stuff (opening files, talking sql, etc.).
 * These proxy-drivers are "just" wrappers around them 
 * providing a more highlevel, consistent API making
 * it easier for Data::Driver::Proxy to do its main work:
 *
 * Multiple stage data fetching and caching:
 *
 * DATA, ...
 *    ... also refered to as data, should be handled as 
 *    something called data.
 *
 * STAGES
 *    x native php4 session: serialized payload
 *    x single rdbms table: serialized payload
 *       x ... via custom database wrapper
 *          x included php-file, included php-library
 *          o object, component, package, callbacks
 *       x ... via php PEAR DB abstraction objects
 *    x remote objects (items): flat attribute hash
 *       o use Data::Object::Identity
 *       o via Data::Driver::Proxy::RPC or others
 *       o Data::Object::Encoder: encodes/decodes values
 *       o Data::Object::Interpolator: interpolates/resolves references
 * 
 * WORK
 *    x move data transparently around between these stages
 *
 * TOOLS
 *
 * x Overview - Packages, Handlers and Stages:
 *     This is weird.  ;-)
 *     - A Package can be instantiated by its namespaced classname
 *       e.g.: "mkObject('My::Package');"
 *     - A Package can be a Handler for Data::Driver::Proxy
 *     - A Handler implements exactly one Stage
 *     - Data::Driver::Proxy itself embeds these Stages:
 *        x php4-session
 *        x rdbms-table
 *     - An example Handler is Data::Driver::RPC::Remote
 *
 * x Handlers:
 *    x Data::Driver::RPC::Remote
 *        Interacts with a RPC::XML server (todo: talk SOAP!) 
 *        using PEAR::XML::RPC.
 *        It can cache data for "disconnected mode" using the
 *    o Data::Driver::phpHtmlLib
 *    o Data::Driver::PEAR::DB
 *    x Data::Driver::PEAR::Tree (via Data::Lift)
 *
 */

/**
 * 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?
 *
 */

/**
 * Load required modules:
 *
 */
loadModule('DesignPattern::Proxy');

class DesignPattern_RemoteProxy extends DesignPattern_Proxy {

  var $objectId;
  // purpose ...
  var $meta;
  var $payload;
  var $attributes;
  var $backend;

  function DesignPattern_RemoteProxy($objectId = "", $options = array() ) {
    logp(get_class($this) . "->new()", PEAR_LOG_INFO);
    global $proxy;

    // 2003-03-05 - modified constructor
    // expand objectId
    if (is_array($objectId)) {
      $options = $objectId[1];
      $objectId = $objectId[0];
    }

    // trace
      //print Dumper($objectId, $options);

    // initialization/startup
      $this->_init_meta_options($objectId, $options);
      $this->_init_caching();
      $this->_init_load();

    //print Dumper($this);

  }

  function _init_meta_options( $objectId="", $options = array() ) {
    $this->meta = $options;

    if ($objectId) {
      $this->objectId = $objectId;
      
      // set default load mechanism
      if ( $this->meta[remote] && ((!$this->meta[oid] && !$this->meta[guid]) || ($this->meta[oid] && $this->meta[guid])) && (!$this->meta[key]) ) {
        $this->meta[oid] = 1;
      }
      
    }
  }

  function _init_caching() {
    
    if ($this->meta[cache][session]) {
      session_register_safe("proxy");
    }  

    if ($this->meta[remote]) {
      //$this->backend = mkObject('Data::Driver::RPC::Remote', $this->meta[rpcinfo]);
      $this->backend = php::mkComponent('DataSource::Proxy::XMLRPC', $this->meta[rpcinfo]);
    }
  }

  function _init_load() {
    if ($this->objectId) {
      $this->load();
      //$this->_saveProxy();
    }
  }


  function load() {
    logp(get_class($this) . "->load()", PEAR_LOG_INFO);
    if (!$this->_loadState()) {
      if (!$this->_loadProxy()) {

        // just load object from remote side if its flagged to be a remote one ...
        if ($this->meta[remote]) {
          $this->_loadRemote();
        }

      }
    }
  }  

  function save($data, $type) {
    $this->_setAttributes($data);
    $this->_saveState();
    if ($type == 'commit') {
      $this->_commit();
    }
    if ($type == 'create') {
      $this->_create();
    }
  }  

  function flush() {
    $this->flushState();
    $this->flushProxy();
  }      

  function _commit() {
    $this->_saveBackend($this->attributes);
    $this->flushState();
    $this->flushProxy();
  }  


  // TODO: make this work
  /*
  function _create() {
    $this->_createBackend($this->attributes);
    $this->flushState();
    $this->flushProxy();
  }  
  */

  function getResult() {
    if (!$this->meta[decoded]) {
      $this->_decode();
      $this->_saveState();
    }
    return $this->attributes;
  }

  function _setAttributes($data) {
    $this->attributes = $data;
  }

  function flushProxy() {
        connectdb();
    $sql = "DELETE FROM f_proxy WHERE oid='$this->objectId'";
    send_sql($sql);
  }
  
  function flushState() {
    global $proxy;
    unset($proxy[$this->objectId]);
    $this->meta[decoded] = 0;
  }

  function _loadState() {
    global $proxy;

    // trace
      //print Dumper($this);

    // debug
      logp(get_class($this) . "->_loadState()");
      
    if ($this->attributes = $proxy[$this->objectId]) {
      //print "_loadState:" . dumpVar($this->attributes);
      $this->meta[decoded] = 1;
      // TODO: make a parameter from this (0 deactivates session-layer)
      return 0;
    }
  }

  function _saveState() {
    global $proxy;
    logp(get_class($this) . "->_saveState()");
    $proxy[$this->objectId] = $this->attributes;
    //print "_saveState: " . dumpVar($this->attributes);
    // TODO: throw exception-message back to user if operation fails
  }

  function _loadProxy() {
    
    // FIXME!
    if (!$this->meta[cache][db]) { return; }
    
    // trace & debug
      //print Dumper($this);
      logp(get_class($this) . "->_loadProxy()");
      
    connectdb();
    $sql = "SELECT payload FROM f_proxy WHERE oid='$this->objectId'";
    if ($res = send_sql($sql)) {
      $row = mysql_fetch_array($res, MYSQL_ASSOC);
      if ($row) {
        $this->payload = $row[payload];
        // TODO: make a parameter from this (0 deactivates mysqldb-layer)
        return 0;
      }
    }
  }
  
  // TODO: use PEAR here
  function _saveProxy() {

    // FIXME!
    if (!$this->meta[cache][db]) { return; }

    logp(get_class($this) . "->_saveProxy()");
        connectdb();
        if ($this->payload) {
      //$sql = "INSERT INTO f_proxy SET payload='$this->payload' WHERE oid='$this->objectId'";
      $sql = "INSERT INTO f_proxy SET oid='$this->objectId', payload='$this->payload'";
      if (!send_sql($sql)) {
        $sql = "UPDATE f_proxy SET payload='$this->payload' WHERE oid='$this->objectId'";
        send_sql($sql);
      }
    }
  }
  
  function _loadRemote() {
    logp(get_class($this) . "->_loadRemote()");
    
    // trace
      //print Dumper($this->meta);
        
    // TODO: test backend for reachability first (eventually cache this information and "reset" it by another party)
    
    // 1. check backend-handle
    if (!$this->backend) {
      logp(get_class($this) . "->_loadRemote: no backend handle, please check argument 'rpcinfo'", PEAR_LOG_CRIT);
      return;
    }
    
    // determine backend action by metadata
      // check for guid or oid
      if ($this->meta[guid]) {
        if (!$this->objectId) {
          logp(get_class($this) . "->_loadRemote: argument 'guid' requires valid objectId", PEAR_LOG_WARNING);
          return;
        }
        if (!$this->meta[classname]) {
          logp(get_class($this) . "->_loadRemote: argument 'guid' requires 'classname'", PEAR_LOG_WARNING);
          return;
        }
        $args = array( guid => $this->objectId, classname => $this->meta[classname] );
        $result = $this->backend->send('getObjectByGuid', $args );

      } elseif ($this->meta[oid]) {
        if (!$this->objectId) {
          logp(get_class($this) . "->_loadRemote: argument 'oid' requires valid objectId", PEAR_LOG_WARNING);
          return;
        }
        $result = $this->backend->send('getObject', $this->objectId);

      } elseif ($this->meta[key]) {
        if (!$this->meta[command]) {
          logp(get_class($this) . "->_loadRemote: argument 'key' requires 'command'", PEAR_LOG_WARNING);
          return;
        }
        /*
        if (!$this->meta[query]) {
          logp(get_class($this) . "->_loadRemote: argument 'key' requires 'query'", PEAR_LOG_WARNING);
          return;
        }
        */
        $result = $this->backend->send($this->meta[command], $this->meta[query]);
        
      }


    if ($result) {
      //print "result: " . dumpVar($result) . "<br>";
      if (count($result) == 0) { return; }
      
      // FIXME: this is dangerous!
      if ($_GET[debug]) {
        print Dumper($result);
      }
      
      $this->payload = serialize($result);
      // ----- move this to _encode some times
      
      $this->_saveProxy();
      //print "oid: $this->objectId<br>";
      $this->flushState();
    } else {
      //print "Error in _loadRemote!!!<br>";
      logp(get_class($this) . "->_loadRemote: error while trying to talk to remote side", PEAR_LOG_CRIT);
    }
    
  }
  
  function _saveBackend($result) {
    logp(get_class($this) . "->_saveBackend()");

    //$encoder = new TextEncode($result);
    //$encoder->toUTF8();

    // check for guid or oid
    if($this->meta[guid]) {
      $args = array( 'guid' => $this->objectId, 'classname' => $this->meta[classname], 'data' => $result );
      $response = $this->backend->send('saveObjectByGuid', $args, array( utf8 => 1) );
    }
    if($this->meta[oid]) {
      $response = $this->backend->send('saveObject', array('oid' => $this->objectId, 'data' => $result), array( utf8 => 1)  );
    }
  }

  function _decode() {
    // fill attributes-hashtable from message-hashtable
    if (!$this->payload) { return; }
    //if ($this->attributes = $backend->decodeData($this->payload)) {
    if ($this->attributes = unserialize($this->payload)) {
      $this->meta[decoded] = 1;
    }
  }
  
  function store($struct) {
    $this->payload = serialize($struct);
    $this->_saveProxy();
  }

}

?>
1	joko	1.1	<?php
2
3			/**
4			* -------------------------------------------------------------------------
5	joko	1.2	* $Id: RemoteProxy.php,v 1.1 2003/03/03 22:06:46 joko Exp $
6	joko	1.1	* -------------------------------------------------------------------------
7	joko	1.2	* $Log: RemoteProxy.php,v $
8			* Revision 1.1 2003/03/03 22:06:46 joko
9			* refactored from Data::Driver::Proxy
10			*
11	joko	1.1	* Revision 1.3 2003/03/01 04:56:38 joko
12			* new comment style for large blocks - stolen from phpHtmlLib
13			* commit-log encapsulated into such a block
14			* introduced some documentation
15			* refactored todo (now also inside a stylish block)
16			*
17			* Revision 1.2 2003/02/13 21:48:09 joko
18			* + caching mechanisms more configurable now
19			*
20			* Revision 1.1 2003/02/09 17:23:21 joko
21			* + refactored from flib/Application/RPC/ProxyObject.php
22			*
23			* Revision 1.7 2003/02/03 03:31:38 jonen
24			* - moved '$encoder->toISO()' to 'Remote.php'
25			*
26			* Revision 1.6 2002/12/22 13:26:20 jonen
27			* + added support of tangram independent id (e.g. Data::UUID) toggled by option at conrtuctor
28			*
29			* Revision 1.5 2002/12/18 22:36:49 jonen
30			* + added support to get remote objects via backend via 'guid'
31			* + renamed '_loadBackend' to '_loadRemote'
32			* + constructor now accepts additional options:
33			* + remote: try to get object via '_loadRemote' ...
34			* + oid: use the given identifier as an 'oid' when doing '_loadRemote'
35			* + guid: use the given identifier as a 'guid' when doing '_loadRemote'
36			*
37			* Revision 1.4 2002/12/12 02:46:31 joko
38			* + state (session) gets flushed when data was successfully loaded from remote side
39			* + fixed _loadBackend
40			* + fixed flushState
41			*
42			* Revision 1.3 2002/12/06 04:12:54 joko
43			* + replaced 'xyzCache' through 'xyzProxy'
44			* + function store(...)
45			*
46			* Revision 1.2 2002/12/05 21:44:09 joko
47			* + debugging
48			*
49			* Revision 1.1 2002/12/01 17:23:58 joko
50			* + initial check-in
51			*
52			* Revision 1.11 2002/11/12 06:05:58 cvsjoko
53			* + renamed class: Text_Encode -> TextEncode
54			*
55			* Revision 1.10 2002/10/29 19:15:33 cvsjoko
56			* - moved utf8/iso-conversion to lib/utils/Text_Encode.php
57			*
58			* Revision 1.9 2002/10/26 12:32:36 cvsjoko
59			* - removed debugging via "print"
60			* + added generic logging via PEAR::Log
61			*
62			* Revision 1.8 2002/10/22 09:51:38 cvsmax
63			* + moved semi-method 'createBackend' to method $site->user->create at User.class.php
64			*
65			* Revision 1.7 2002/10/21 18:27:09 cvsjoko
66			* - manually disabled any form of caching
67			*
68			* Revision 1.6 2002/10/17 03:48:47 cvsmax
69			* + new
70			* + function _createBackend create new Backend
71			* + function _create api-create
72			*
73			* Revision 1.5 2002/10/16 03:37:54 cvsjoko
74			* + bugfix: wrong comparison in restriction to save to array
75			*
76			* Revision 1.4 2002/10/10 03:04:23 cvsjoko
77			* + no debug-output
78			*
79			* Revision 1.3 2002/10/10 03:03:27 cvsjoko
80			* + bugfix: save object to cache only if payload from backend isn't empty
81			*
82			* Revision 1.2 2002/10/10 02:40:06 cvsjoko
83			* + new level of data-caching (session and persistant)
84			* + function _loadState loads data from session
85			* + function _saveState saves data to session
86			* + function save api-save (session & backend)
87			* + function _commit saves data to backend
88			* + handy utils
89			* + function _setAttributes
90			* + function flushState
91			*
92			* Revision 1.1 2002/10/09 00:51:39 cvsjoko
93			* + new
94			* -------------------------------------------------------------------------
95			*/
96
97			/**
98			*
99			* Data::Driver::Proxy -- Multiple stage data fetching and caching
100			*
101			*
102			* This class (Data::Driver::Proxy) provides an abstract framework
103			* for loading/saving arbitrary data from/to data storages interfaced
104			* by storage proxy-drivers.
105			* Don't mix these up with the concrete storage handle-drivers
106			* doing the lowlevel stuff (opening files, talking sql, etc.).
107			* These proxy-drivers are "just" wrappers around them
108			* providing a more highlevel, consistent API making
109			* it easier for Data::Driver::Proxy to do its main work:
110			*
111			* Multiple stage data fetching and caching:
112			*
113			* DATA, ...
114			* ... also refered to as data, should be handled as
115			* something called data.
116			*
117			* STAGES
118			* x native php4 session: serialized payload
119			* x single rdbms table: serialized payload
120			* x ... via custom database wrapper
121			* x included php-file, included php-library
122			* o object, component, package, callbacks
123			* x ... via php PEAR DB abstraction objects
124			* x remote objects (items): flat attribute hash
125			* o use Data::Object::Identity
126			* o via Data::Driver::Proxy::RPC or others
127			* o Data::Object::Encoder: encodes/decodes values
128			* o Data::Object::Interpolator: interpolates/resolves references
129			*
130			* WORK
131			* x move data transparently around between these stages
132			*
133			* TOOLS
134			*
135			* x Overview - Packages, Handlers and Stages:
136			* This is weird. ;-)
137			* - A Package can be instantiated by its namespaced classname
138			* e.g.: "mkObject('My::Package');"
139			* - A Package can be a Handler for Data::Driver::Proxy
140			* - A Handler implements exactly one Stage
141			* - Data::Driver::Proxy itself embeds these Stages:
142			* x php4-session
143			* x rdbms-table
144			* - An example Handler is Data::Driver::RPC::Remote
145			*
146			* x Handlers:
147			* x Data::Driver::RPC::Remote
148			* Interacts with a RPC::XML server (todo: talk SOAP!)
149			* using PEAR::XML::RPC.
150			* It can cache data for "disconnected mode" using the
151			* o Data::Driver::phpHtmlLib
152			* o Data::Driver::PEAR::DB
153			* x Data::Driver::PEAR::Tree (via Data::Lift)
154			*
155			*/
156
157			/**
158			* Todo:
159			* x extend options to en-/disable caching via a) session and/or b) database
160			* o make feature available via runtime setter-method to these options
161			* o use PEAR::Cache for caching purposes!!!
162			* o refactor database access: use PEAR for this! no more 'connectdb' here!!!
163			* o make database connection more flexible to make possible
164			* to have different (probably named) proxy databases (besides a "main database")
165			* o rename this to Data::Proxy? or split into Data::Query, Data::Result and Data::Wrapper?
166			*
167			*/
168
169			/**
170			* Load required modules:
171			*
172			*/
173			loadModule('DesignPattern::Proxy');
174
175			class DesignPattern_RemoteProxy extends DesignPattern_Proxy {
176
177			var $objectId;
178			// purpose ...
179			var $meta;
180			var $payload;
181			var $attributes;
182			var $backend;
183
184			function DesignPattern_RemoteProxy($objectId = "", $options = array() ) {
185			logp(get_class($this) . "->new()", PEAR_LOG_INFO);
186			global $proxy;
187
188	joko	1.2	// 2003-03-05 - modified constructor
189			// expand objectId
190			if (is_array($objectId)) {
191			$options = $objectId[1];
192			$objectId = $objectId[0];
193			}
194
195	joko	1.1	// trace
196			//print Dumper($objectId, $options);
197
198			// initialization/startup
199			$this->_init_meta_options($objectId, $options);
200			$this->_init_caching();
201			$this->_init_load();
202
203	joko	1.2	//print Dumper($this);
204
205	joko	1.1	}
206
207			function _init_meta_options( $objectId="", $options = array() ) {
208			$this->meta = $options;
209
210			if ($objectId) {
211			$this->objectId = $objectId;
212
213			// set default load mechanism
214			if ( $this->meta[remote] && ((!$this->meta[oid] && !$this->meta[guid]) \|\| ($this->meta[oid] && $this->meta[guid])) && (!$this->meta[key]) ) {
215			$this->meta[oid] = 1;
216			}
217
218			}
219			}
220
221			function _init_caching() {
222
223			if ($this->meta[cache][session]) {
224			session_register_safe("proxy");
225			}
226
227			if ($this->meta[remote]) {
228			//$this->backend = mkObject('Data::Driver::RPC::Remote', $this->meta[rpcinfo]);
229	joko	1.2	$this->backend = php::mkComponent('DataSource::Proxy::XMLRPC', $this->meta[rpcinfo]);
230	joko	1.1	}
231			}
232
233			function _init_load() {
234			if ($this->objectId) {
235			$this->load();
236			//$this->_saveProxy();
237			}
238			}
239
240
241			function load() {
242			logp(get_class($this) . "->load()", PEAR_LOG_INFO);
243			if (!$this->_loadState()) {
244			if (!$this->_loadProxy()) {
245
246			// just load object from remote side if its flagged to be a remote one ...
247			if ($this->meta[remote]) {
248			$this->_loadRemote();
249			}
250
251			}
252			}
253			}
254
255			function save($data, $type) {
256			$this->_setAttributes($data);
257			$this->_saveState();
258			if ($type == 'commit') {
259			$this->_commit();
260			}
261			if ($type == 'create') {
262			$this->_create();
263			}
264			}
265
266			function flush() {
267			$this->flushState();
268			$this->flushProxy();
269			}
270
271			function _commit() {
272			$this->_saveBackend($this->attributes);
273			$this->flushState();
274			$this->flushProxy();
275			}
276
277
278			// TODO: make this work
279			/*
280			function _create() {
281			$this->_createBackend($this->attributes);
282			$this->flushState();
283			$this->flushProxy();
284			}
285			*/
286
287	joko	1.2	function getResult() {
288	joko	1.1	if (!$this->meta[decoded]) {
289			$this->_decode();
290			$this->_saveState();
291			}
292			return $this->attributes;
293			}
294
295			function _setAttributes($data) {
296			$this->attributes = $data;
297			}
298
299			function flushProxy() {
300			connectdb();
301			$sql = "DELETE FROM f_proxy WHERE oid='$this->objectId'";
302			send_sql($sql);
303			}
304
305			function flushState() {
306			global $proxy;
307			unset($proxy[$this->objectId]);
308			$this->meta[decoded] = 0;
309			}
310
311			function _loadState() {
312			global $proxy;
313
314			// trace
315			//print Dumper($this);
316
317			// debug
318			logp(get_class($this) . "->_loadState()");
319
320			if ($this->attributes = $proxy[$this->objectId]) {
321			//print "_loadState:" . dumpVar($this->attributes);
322			$this->meta[decoded] = 1;
323			// TODO: make a parameter from this (0 deactivates session-layer)
324			return 0;
325			}
326			}
327
328			function _saveState() {
329			global $proxy;
330			logp(get_class($this) . "->_saveState()");
331			$proxy[$this->objectId] = $this->attributes;
332			//print "_saveState: " . dumpVar($this->attributes);
333			// TODO: throw exception-message back to user if operation fails
334			}
335
336			function _loadProxy() {
337
338			// FIXME!
339			if (!$this->meta[cache][db]) { return; }
340
341			// trace & debug
342			//print Dumper($this);
343			logp(get_class($this) . "->_loadProxy()");
344
345			connectdb();
346			$sql = "SELECT payload FROM f_proxy WHERE oid='$this->objectId'";
347			if ($res = send_sql($sql)) {
348			$row = mysql_fetch_array($res, MYSQL_ASSOC);
349			if ($row) {
350			$this->payload = $row[payload];
351			// TODO: make a parameter from this (0 deactivates mysqldb-layer)
352			return 0;
353			}
354			}
355			}
356
357			// TODO: use PEAR here
358			function _saveProxy() {
359
360			// FIXME!
361			if (!$this->meta[cache][db]) { return; }
362
363			logp(get_class($this) . "->_saveProxy()");
364			connectdb();
365			if ($this->payload) {
366			//$sql = "INSERT INTO f_proxy SET payload='$this->payload' WHERE oid='$this->objectId'";
367			$sql = "INSERT INTO f_proxy SET oid='$this->objectId', payload='$this->payload'";
368			if (!send_sql($sql)) {
369			$sql = "UPDATE f_proxy SET payload='$this->payload' WHERE oid='$this->objectId'";
370			send_sql($sql);
371			}
372			}
373			}
374
375			function _loadRemote() {
376			logp(get_class($this) . "->_loadRemote()");
377
378			// trace
379			//print Dumper($this->meta);
380
381			// TODO: test backend for reachability first (eventually cache this information and "reset" it by another party)
382
383			// 1. check backend-handle
384			if (!$this->backend) {
385			logp(get_class($this) . "->_loadRemote: no backend handle, please check argument 'rpcinfo'", PEAR_LOG_CRIT);
386			return;
387			}
388
389			// determine backend action by metadata
390			// check for guid or oid
391			if ($this->meta[guid]) {
392			if (!$this->objectId) {
393			logp(get_class($this) . "->_loadRemote: argument 'guid' requires valid objectId", PEAR_LOG_WARNING);
394			return;
395			}
396			if (!$this->meta[classname]) {
397			logp(get_class($this) . "->_loadRemote: argument 'guid' requires 'classname'", PEAR_LOG_WARNING);
398			return;
399			}
400			$args = array( guid => $this->objectId, classname => $this->meta[classname] );
401			$result = $this->backend->send('getObjectByGuid', $args );
402
403			} elseif ($this->meta[oid]) {
404			if (!$this->objectId) {
405			logp(get_class($this) . "->_loadRemote: argument 'oid' requires valid objectId", PEAR_LOG_WARNING);
406			return;
407			}
408			$result = $this->backend->send('getObject', $this->objectId);
409
410			} elseif ($this->meta[key]) {
411			if (!$this->meta[command]) {
412			logp(get_class($this) . "->_loadRemote: argument 'key' requires 'command'", PEAR_LOG_WARNING);
413			return;
414			}
415			/*
416			if (!$this->meta[query]) {
417			logp(get_class($this) . "->_loadRemote: argument 'key' requires 'query'", PEAR_LOG_WARNING);
418			return;
419			}
420			*/
421			$result = $this->backend->send($this->meta[command], $this->meta[query]);
422
423			}
424
425
426
427			if ($result) {
428			//print "result: " . dumpVar($result) . "<br>";
429			if (count($result) == 0) { return; }
430
431			// FIXME: this is dangerous!
432			if ($_GET[debug]) {
433			print Dumper($result);
434			}
435
436			$this->payload = serialize($result);
437			// ----- move this to _encode some times
438
439			$this->_saveProxy();
440			//print "oid: $this->objectId<br>";
441			$this->flushState();
442			} else {
443			//print "Error in _loadRemote!!!<br>";
444			logp(get_class($this) . "->_loadRemote: error while trying to talk to remote side", PEAR_LOG_CRIT);
445			}
446
447			}
448
449			function _saveBackend($result) {
450			logp(get_class($this) . "->_saveBackend()");
451
452			//$encoder = new TextEncode($result);
453			//$encoder->toUTF8();
454
455			// check for guid or oid
456			if($this->meta[guid]) {
457			$args = array( 'guid' => $this->objectId, 'classname' => $this->meta[classname], 'data' => $result );
458			$response = $this->backend->send('saveObjectByGuid', $args, array( utf8 => 1) );
459			}
460			if($this->meta[oid]) {
461			$response = $this->backend->send('saveObject', array('oid' => $this->objectId, 'data' => $result), array( utf8 => 1) );
462			}
463			}
464
465			function _decode() {
466			// fill attributes-hashtable from message-hashtable
467			if (!$this->payload) { return; }
468			//if ($this->attributes = $backend->decodeData($this->payload)) {
469			if ($this->attributes = unserialize($this->payload)) {
470			$this->meta[decoded] = 1;
471			}
472			}
473
474			function store($struct) {
475			$this->payload = serialize($struct);
476			$this->_saveProxy();
477			}
478
479			}
480
481			?>
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