Monitoring\Backend: reduce to compat facade

This is a facade for Monitoring\Backend right now. To be removed as soon
as it got replaced everywhere.

refs #7635

modules/monitoring/library/Monitoring/Backend.php

@@ -1,186 +1,11 @@
 <?php
-// {{{ICINGA_LICENSE_HEADER}}}
+
-// {{{ICINGA_LICENSE_HEADER}}}
+// TODO: obsolete, remove once MonitoringBackend is in use everywhere
 
 namespace Icinga\Module\Monitoring;
 
-use Icinga\Exception\ProgrammingError;
+use Icinga\Module\Monitoring\Backend\MonitoringBackend;
-use Icinga\Data\Selectable;
-use Icinga\Data\Queryable;
-use Icinga\Data\ConnectionInterface;
 
-use Icinga\Application\Config;
+class Backend extends MonitoringBackend
-use Icinga\Data\ResourceFactory;
-use Icinga\Exception\ConfigurationError;
-
-/**
- * Data view and query loader tied to a backend type
- */
-class Backend implements Selectable, Queryable, ConnectionInterface
 {
-    /**
-     * Resource
-     *
-     * @var mixed
-     */
-    protected $resource;
-
-    /**
-     * Type
-     *
-     * @var string
-     */
-    protected $type;
-
-    protected $name;
-
-    /**
-     * Create a new backend
-     *
-     * @param   mixed   $resource
-     * @param   string  $type
-     */
-    public function __construct($resource, $type)
-    {
-        $this->resource = $resource;
-        $this->type = $type;
-    }
-
-    // Temporary workaround, we have no way to know our name
-    protected function setName($name)
-    {
-        $this->name = $name;
-    }
-
-    public function getName()
-    {
-        return $this->name;
-    }
-
-    /**
-     * Create a backend
-     *
-     * @param   string $backendName Name of the backend or null for creating the default backend which is the first INI
-     *                              configuration entry not being disabled
-     *
-     * @return  Backend
-     * @throws  ConfigurationError  When no backend has been configured or all backends are disabled or the
-     *                              configuration for the requested backend does either not exist or it's disabled
-     */
-    public static function createBackend($backendName = null)
-    {
-        $config = Config::module('monitoring', 'backends');
-        if ($config->count() === 0) {
-            throw new ConfigurationError(mt('monitoring', 'No backend has been configured'));
-        }
-        if ($backendName !== null) {
-            $backendConfig = $config->get($backendName);
-            if ($backendConfig === null) {
-                throw new ConfigurationError('No configuration for backend %s', $backendName);
-            }
-            if ((bool) $backendConfig->get('disabled', false) === true) {
-                throw new ConfigurationError(
-                    mt('monitoring', 'Configuration for backend %s available but backend is disabled'),
-                    $backendName
-                );
-            }
-        } else {
-            foreach ($config as $name => $backendConfig) {
-                if ((bool) $backendConfig->get('disabled', false) === false) {
-                    $backendName = $name;
-                    break;
-                }
-            }
-            if ($backendName === null) {
-                throw new ConfigurationError(mt('monitoring', 'All backends are disabled'));
-            }
-        }
-        $resource = ResourceFactory::create($backendConfig->resource);
-        if ($backendConfig->type === 'ido' && $resource->getDbType() !== 'oracle') {
-            // TODO(el): The resource should set the table prefix
-            $resource->setTablePrefix('icinga_');
-        }
-        $backend = new Backend($resource, $backendConfig->type);
-        $backend->setName($backendName);
-        return $backend;
-    }
-
-public function getResource()
-{
-    return $this->resource;
-}
-
-    /**
-     * Backend entry point
-     *
-     * @return self
-     */
-    public function select()
-    {
-        return $this;
-    }
-
-    /**
-     * Create a data view to fetch data from
-     *
-     * @param   string  $viewName
-     * @param   array   $columns
-     *
-     * @return  DataView
-     */
-    public function from($viewName, array $columns = null)
-    {
-        $viewClass = $this->resolveDataViewName($viewName);
-        return new $viewClass($this, $columns);
-    }
-
-    /**
-     * View name to class name resolution
-     *
-     * @param   string $viewName
-     *
-     * @return  string
-     * @throws  ProgrammingError When the view does not exist
-     */
-    protected function resolveDataViewName($viewName)
-    {
-        $viewClass = '\\Icinga\\Module\\Monitoring\\DataView\\' . ucfirst($viewName);
-        if (!class_exists($viewClass)) {
-            throw new ProgrammingError(
-                'DataView %s does not exist',
-                ucfirst($viewName)
-            );
-        }
-        return $viewClass;
-    }
-
-    public function getQueryClass($name)
-    {
-        return $this->resolveQueryName($name);
-    }
-
-    /**
-     * Query name to class name resolution
-     *
-     * @param   string $queryName
-     *
-     * @return  string
-     * @throws  ProgrammingError When the query does not exist for this backend
-     */
-    protected function resolveQueryName($queryName)
-    {
-        $queryClass = '\\Icinga\\Module\\Monitoring\\Backend\\'
-            . ucfirst($this->type)
-            . '\\Query\\'
-            . ucfirst($queryName)
-            . 'Query';
-        if (!class_exists($queryClass)) {
-            throw new ProgrammingError(
-                'Query "%s" does not exist for backend %s',
-                ucfirst($queryName),
-                ucfirst($this->type)
-            );
-        }
-        return $queryClass;
-    }
 }