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<?php |
<?php |
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/** |
/** |
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* --- @about |
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* |
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* This file contains the DataSource::Locator class. |
* This file contains the DataSource::Locator class. |
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* |
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* It acts as a container for DataSource connection |
* It acts as a container for DataSource connection |
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* metadata. Think of it as an enhanced dsn. |
* metadata. Think of it as an enhanced dsn. |
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* |
* |
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* It gets used by DataSource::GenericDataSource |
* It gets used by DataSource::Generic |
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* to be informed about the most important stuff it |
* to be informed about the most important stuff it |
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* has to do. |
* has to do. |
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* |
* |
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* $Id$ |
* $Id$ |
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* |
* |
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* $Log$ |
* $Log$ |
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* Revision 1.6 2003/03/05 16:10:08 joko |
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* updated docu (phpDocumentor testing....) |
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* |
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* Revision 1.5 2003/03/05 15:40:39 joko |
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* updated docu (phpDocumentor testing....) |
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* Revision 1.4 2003/03/05 15:26:23 joko |
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* updated docu (phpDocumentor testing....) |
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* Revision 1.3 2003/03/05 15:21:54 joko |
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* updated docu (phpDocumentor testing....) |
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* Revision 1.2 2003/03/05 15:01:10 joko |
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* updated docu |
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* |
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* Revision 1.1 2003/03/05 12:04:37 joko |
* Revision 1.1 2003/03/05 12:04:37 joko |
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* + initial commit |
* + initial commit |
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* |
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*/ |
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/** |
/** |
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* --- @description |
* It helps DataSource::Generic working in different "operation modes". |
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* |
* |
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* --- It helps GenericDataSource working in different "operation modes". |
* - Pass-Through-Reference: php Object will get passed through all layers |
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* - Pass-Through-Memory: reference to a memory area will get used |
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* + Build-Locator: build locator from datasource-type and adapter-type |
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* - Use-Locator: directly use DataSource::Locator instance passed in |
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* - Merge-Locators: merge metadata of two or more DataSource::Locator instances |
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* - Build-AutoLocator: use global constants making up our metadata |
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* |
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* <b>It can/should contain:</b> |
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* |
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* <pre> |
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* (flexible, just some parameters are required for each operation mode) |
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* - an oldschool "dsn"-string (e.g. for rdbms-connection via PEAR) |
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* + name of a Proxy module to use to *wrap/hide* the connection/transport-layer |
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* (e.g. DataSource::Proxy::XMLRPC via DesignPattern::RemoteProxy) |
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* + metadata (a hash) directly describing *where* to connect to (e.g. 'Host', 'Port') |
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* - an instance of an already instantiated arbitrary datasource handler (e.g. 'source') |
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* this will get propagated (pass-through-mode) |
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* - a datasource-type (of 'rpc|mysql|csv-file|xml-file') |
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* this will be mapped to a module name and used as a *Proxy* |
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* by the DataSource::Generic at runtime |
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* + an adapter-type (of 'phpHtmlLib|pear') |
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* this will be mapped to a module name and used as an *Adapter* |
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* by the DataSource::Generic at runtime |
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* - names of global constants where to find these informations |
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* - datasource-type ('rpc|csv-file|...') <-> datasource-family ('orm|rdbms|odbms') |
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* </pre> |
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* |
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* |
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* <b>It can do</b> |
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* + builds a larger locator from a minimum of information passed in via constructor-arguments |
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* o direct fallback mode to some predefined constant names if locator is empty and above method fails |
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* o direct fallback mode to some predefined values if just *everything* fails |
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* |
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* o Pass-Through-Reference: php Object will get passed through all layers |
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* o Pass-Through-Memory: reference to a memory area will get used |
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* x Build-Locator: build locator from datasource-type and adapter-type |
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* o Use-Locator: directly use DataSource::Locator instance passed in |
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* o Merge-Locators: merge metadata of two or more DataSource::Locator instances |
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* o Build-AutoLocator: use global constants making up our metadata |
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* |
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* |
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* --- It can/should contain (flexible, just some parameters are required for each operation mode) |
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* |
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* o an oldschool "dsn"-string (e.g. for rdbms-connection via PEAR) |
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* x name of a Proxy module to use to *wrap/hide* the connection/transport-layer |
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* (e.g. DataSource::Proxy::XMLRPC via DesignPattern::RemoteProxy) |
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* x metadata (a hash) directly describing *where* to connect to (e.g. 'Host', 'Port') |
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* o an instance of an already instantiated arbitrary datasource handler (e.g. 'source') |
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* this will get propagated (pass-through-mode) |
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* x a datasource-type (of 'rpc|mysql|csv-file|xml-file') |
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* this will be mapped to a module name and used as a *Proxy* |
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* by the GenericDataSource at runtime |
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* x an adapter-type (of 'phpHtmlLib|pear') |
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* this will be mapped to a module name and used as an *Adapter* |
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* by the GenericDataSource at runtime |
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* o names of global constants where to find these informations |
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* o datasource-type ('rpc|csv-file|...') <-> datasource-family ('orm|rdbms|odbms') |
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* |
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* |
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* --- It can do |
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* x builds a larger locator from a minimum of information passed in via constructor-arguments |
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* o direct fallback mode to some predefined constant names if locator is empty and above method fails |
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* o direct fallback mode to some predefined values if just *everything* fails |
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* |
* |
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* <b>How to use?</b> |
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* --- How to use? |
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* |
* |
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* Pass an array holding "locator metadata" to the constructor. |
* Pass an array holding "locator metadata" to the constructor. |
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* This module takes care of the rest. |
* This module takes care of the rest. |
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* Pass an array to the constructor: (e.g.) |
* Pass an array to the constructor: (e.g.) |
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* |
* |
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* 1. for doing rpc-calls.... |
* 1. for doing rpc-calls.... |
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* <code> |
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* $locator = array( |
* $locator = array( |
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* datasource_type => 'rpc', |
* datasource_type => 'rpc', |
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* [adapter_type => 'phpHtmlLib',] |
* [adapter_type => 'phpHtmlLib',] |
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* metadata => array( Host => 'localhost', Port => '8765' ), |
* metadata => array( Host => 'localhost', Port => '8765' ), |
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* ); |
* ); |
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* $source = new GenericDataSource($locator); |
* $source = new DataSource::Generic($locator); |
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* $this->set_data_source( &$source ); |
* $this->set_data_source( &$source ); |
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* </code> |
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* |
* |
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* 2. [proposal] for common/oldschool datahandles.... |
* 2. [proposal] for common/oldschool datahandles.... |
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* <code> |
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* $locator = array( |
* $locator = array( |
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* dsn => 'known dsn markup', |
* dsn => 'known dsn markup', |
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* ); |
* ); |
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* $source = new GenericDataSource($locator); |
* $source = new DataSource::Generic($locator); |
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* $this->set_data_source( &$source ); |
* $this->set_data_source( &$source ); |
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* </code> |
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* |
* |
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* |
* |
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* |
* |
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* @author Andreas Motl <andreas.motl@ilo.de> |
* @author Andreas Motl <andreas.motl@ilo.de> |
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* @link http://www.netfrag.org/~joko/ |
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* @copyright (c) 2003 - All Rights reserved. |
* @copyright (c) 2003 - All Rights reserved. |
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* |
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* @license GNU LGPL (GNU Lesser General Public License) |
* @license GNU LGPL (GNU Lesser General Public License) |
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* @link http://www.gnu.org/licenses/lgpl.txt |
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* |
* |
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* @author-url http://www.netfrag.org/~joko/ |
* @name DataSource::Locator |
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* @license-url http://www.gnu.org/licenses/lgpl.txt |
* @filesource |
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* |
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* @author Andreas Motl <andreas.motl@ilo.de> |
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* @package org.netfrag.glib |
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* @module DataSource::Locator |
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* |
* |
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*/ |
*/ |
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* using metadata from $_options and some |
* using metadata from $_options and some |
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* other presets. |
* other presets. |
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* |
* |
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* See '_buildLocator' which acts as a dispatcher |
* @see function build, which acts as a dispatcher |
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* depending on $_options[datasource]. |
* depending on $_options[datasource]. |
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* (main dispatching level) |
* (main dispatching level) |
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* |
* |
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* The structure of a full blown locator looks like this: |
* The structure of a full blown locator looks like this: |
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* |
* |
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* <code> |
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* $locator = array( |
* $locator = array( |
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* type => '<your type specifying the datasource-type>', |
* type => '<your type specifying the datasource-type>', |
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* metadata => array( |
* metadata => array( |
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* ), |
* ), |
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* [dsn => '<your dsn markup>'], |
* [dsn => '<your dsn markup>'], |
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* ); |
* ); |
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* </code> |
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* |
* |
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* Example 1 - data is inside a rdbms, using a dsn to connect to it: |
* Example 1 - data is inside a rdbms, using a dsn to connect to it: |
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* <code> |
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* $locator = array( |
* $locator = array( |
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* dsn => 'mysql://username:password@localhost/database', |
* dsn => 'mysql://username:password@localhost/database', |
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* ); |
* ); |
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* </code> |
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* |
* |
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* Example 2 - data is inside an odbms, reachable by doing remote procedure calls (rpc): |
* Example 2 - data is inside an odbms, reachable by doing remote procedure calls (rpc): |
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* <code> |
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* $locator = array( |
* $locator = array( |
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* type => 'rpc', |
* type => 'rpc', |
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* metadata => array( |
* metadata => array( |
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* Port => '8765', |
* Port => '8765', |
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* ) |
* ) |
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* ); |
* ); |
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* </code> |
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* |
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* @deprecated |
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* |
* |
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*/ |
*/ |
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var $_locator_metadata = NULL; |
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//var $_locator_metadata = NULL; |
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/** |
/** |
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* This var holds the arguments passed in to the constructor. |
* This var holds the arguments passed in to the constructor. |
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* We will try to build full blown locator metadata information from that. |
* We will try to build full blown locator metadata information from that. |
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* |
* |
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*/ |
* @deprecated |
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//var $_in = NULL; |
* |
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*/ |
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var $_in = NULL; |
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/** |
/** |
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* This var holds the locator metadata informations inside |
* This var holds the locator metadata informations inside |
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* a single hash. This is returned from '->get()'. |
* a single hash. This is returned from '->get()'. |
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* |
* |
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*/ |
* @deprecated |
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//var $_out = NULL; |
* |
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*/ |
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var $_out = NULL; |
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/** |
/** |
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// name of an Adapter module |
// name of an Adapter module |
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var $_adapter_type; |
var $_adapter_type; |
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// additional information required (passed on to the Proxy by GenericDataSource) |
// additional information required (passed on to the Proxy by DataSource::Generic) |
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var $_metadata = array(); |
var $_metadata = array(); |
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//var $_dsn; |
//var $_dsn; |
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* The constructor is used to pass in the |
* The constructor is used to pass in the |
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* locator metadata hash. |
* locator metadata hash. |
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* |
* |
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* @param LocatorMetadataHash array - layout: array( type => '', metadata => '', dsn => '' ) |
* @param object(DataSource::Locator)|hash optional: a &$locator instance |
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* @param Query array - layout: array( type => '', metadata => '', dsn => '' ) |
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*/ |
*/ |
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function DataSource_Locator() { |
function DataSource_Locator() { |
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$args_multi = func_get_args(); |
$args_multi = func_get_args(); |
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/** |
/** |
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* Set the locator metadata hash we will feed *partly* |
* Set the locator metadata hash we will feed *partly* |
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* to an encapsulated Data::Driver::Proxy instance. |
* to an encapsulated Data::Driver::Proxy instance |
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* |
* |
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* @param LocatorMetadataHash array - |
* @param LocatorMetadataHash array - |
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* |
* |
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$metadata = array( |
$metadata = array( |
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//package => 'Data::Driver::Proxy', |
//package => 'Data::Driver::Proxy', |
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//package => 'DataSource::Proxy::XMLRPC', |
//package => 'DataSource::Proxy::XMLRPC', |
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//package => 'DataSource::GenericDataSource', |
//package => 'DataSource::Generic', |
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//package => 'DesignPattern::RemoteProxy', |
//package => 'DesignPattern::RemoteProxy', |
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Host => RPC_HOSTNAME, |
Host => RPC_HOSTNAME, |
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Port => RPC_PORT, |
Port => RPC_PORT, |