[zendframework#5254] Pre-process configuration to inject DB adapter i…

…nstance

- Looks for a named DB adapter in the writer configuration, and, if
  found, retrieves it from the service locator passed to the factory,
  re-setting the db configuration to use the discovered adapter.

library/Zend/Log/LoggerAbstractServiceFactory.php

@@ -56,7 +56,9 @@ public function canCreateServiceWithName(ServiceLocatorInterface $services, $nam
     public function createServiceWithName(ServiceLocatorInterface $services, $name, $requestedName)
     {
         $config  = $this->getConfig($services);
-        return new Logger($config[$requestedName]);
+        $config  = $config[$requestedName];
+        $this->processConfig($config, $services);
+        return new Logger($config);
     }
 
     /**
@@ -85,4 +87,35 @@ protected function getConfig(ServiceLocatorInterface $services)
         $this->config = $config[$this->configKey];
         return $this->config;
     }
+
+    protected function processConfig(&$config, ServiceLocatorInterface $services)
+    {
+        if (!isset($config['writers'])) {
+            return;
+        }
+
+        foreach ($config['writers'] as $index => $writerConfig) {
+            if (!isset($writerConfig['name'])
+                || strtolower($writerConfig['name']) != 'db'
+            ) {
+                continue;
+            }
+            if (!isset($writerConfig['options'])
+                || !isset($writerConfig['options']['db'])
+            ) {
+                continue;
+            }
+            if (!is_string($writerConfig['options']['db'])) {
+                continue;
+            }
+            if (!$services->has($writerConfig['options']['db'])) {
+                continue;
+            }
+
+            // Retrieve the DB service from the service locator, and
+            // inject it into the configuration.
+            $db = $services->get($writerConfig['options']['db']);
+            $config['writers'][$index]['options']['db'] = $db;
+        }
+    }
 }

tests/ZendTest/Log/LoggerAbstractServiceFactoryTest.php

@@ -9,8 +9,9 @@
 
 namespace ZendTest\Log;
 
-use Zend\ServiceManager\ServiceManager;
+use Zend\Log\Writer\Db as DbWriter;
 use Zend\Mvc\Service\ServiceManagerConfig;
+use Zend\ServiceManager\ServiceManager;
 
 /**
  * @group      Zend_Log
@@ -83,4 +84,48 @@ public function testInvalidLoggerService($service)
     {
         $actual = $this->serviceManager->get($service);
     }
+
+    /**
+     * @group 5254
+     */
+    public function testRetrievesDatabaseServiceFromServiceManagerWhenEncounteringDbWriter()
+    {
+        $db = $this->getMockBuilder('Zend\Db\Adapter\Adapter')
+            ->disableOriginalConstructor()
+            ->getMock();
+        $serviceManager = new ServiceManager(new ServiceManagerConfig(array(
+            'abstract_factories' => array('Zend\Log\LoggerAbstractServiceFactory'),
+        )));
+        $serviceManager->setService('Db\Logger', $db);
+        $serviceManager->setService('Config', array(
+            'log' => array(
+                'Application\Log' => array(
+                    'writers' => array(
+                        array(
+                            'name'     => 'db',
+                            'priority' => 1,
+                            'options'  => array(
+                                'separator' => '_',
+                                'column'    => array(),
+                                'table'     => 'applicationlog',
+                                'db'        => 'Db\Logger',
+                            ),
+                        ),
+                    ),
+                ),
+            ),
+        ));
+        $logger = $serviceManager->get('Application\Log');
+        $this->assertInstanceOf('Zend\Log\Logger', $logger);
+        $writers = $logger->getWriters();
+        $found   = false;
+        foreach ($writers as $writer) {
+            if ($writer instanceof DbWriter) {
+                $found = true;
+                break;
+            }
+        }
+        $this->assertTrue($found, 'Did not find expected DB writer');
+        $this->assertAttributeSame($db, 'db', $writer);
+    }
 }