From 52a11d6ac34d390625456bacb1846dcc5052aaef Mon Sep 17 00:00:00 2001
From: Alex Pott <alex.a.pott@googlemail.com>
Date: Wed, 21 May 2014 14:59:11 +0100
Subject: [PATCH] Revert "Issue #1289536 by RobLoach, Crell, Pancho, pounard,
 socketwench, fgm, dawehner, scor, tim.plunkett, larowlan, ParisLiakos: Switch
 Watchdog to a PSR-3 logging framework."

This reverts commit ef250ba2cb737d7b575321095a518c7ca8193d18.
---
 core/authorize.php                            |   2 +-
 core/core.services.yml                        |  15 +-
 core/includes/bootstrap.inc                   |  56 ++++++-
 core/lib/Drupal.php                           |  14 --
 .../Core/Controller/ControllerResolver.php    |   4 +-
 .../Core/Controller/ExceptionController.php   |   4 +-
 core/lib/Drupal/Core/Form/FormValidator.php   |   2 +-
 .../Drupal/Core/Logger/LogMessageParser.php   |  46 -----
 .../Core/Logger/LogMessageParserInterface.php |  39 -----
 core/lib/Drupal/Core/Logger/LoggerChannel.php | 158 ------------------
 .../Core/Logger/LoggerChannelFactory.php      |  74 --------
 .../Logger/LoggerChannelFactoryInterface.php  |  40 -----
 .../Core/Logger/LoggerChannelInterface.php    |  53 ------
 core/lib/Drupal/Core/Routing/UrlGenerator.php |   4 +-
 .../lib/Drupal/config/Form/ConfigSync.php     |   2 +-
 core/modules/dblog/dblog.module               |  26 +++
 core/modules/dblog/dblog.services.yml         |   6 -
 .../dblog/lib/Drupal/dblog/Logger/DbLog.php   |  76 ---------
 .../lib/Drupal/dblog/Tests/DbLogTest.php      |   8 +-
 .../filter/Tests/FilterSettingsTest.php       |   2 +
 .../rest/lib/Drupal/rest/Tests/DBLogTest.php  |   6 +-
 .../lib/Drupal/syslog/Logger/SysLog.php       |  96 -----------
 core/modules/syslog/syslog.module             |  33 ++++
 core/modules/syslog/syslog.services.yml       |   6 -
 .../system/Tests/Entity/EntityApiInfoTest.php |   4 +-
 .../Drupal/system/Tests/Pager/PagerTest.php   |   2 +-
 core/modules/system/system.api.php            |  88 ++++++++++
 .../entity_cache_test.module                  |  16 +-
 .../SpecialAttributesRouteSubscriberTest.php  |   2 +-
 .../Tests/Core/Form/FormBuilderTest.php       |   1 -
 .../Core/Logger/LogMessageParserTest.php      |  93 -----------
 .../Core/Logger/LoggerChannelFactoryTest.php  |  66 --------
 .../Tests/Core/Logger/LoggerChannelTest.php   | 158 ------------------
 core/update.php                               |   2 +-
 34 files changed, 228 insertions(+), 976 deletions(-)
 delete mode 100644 core/lib/Drupal/Core/Logger/LogMessageParser.php
 delete mode 100644 core/lib/Drupal/Core/Logger/LogMessageParserInterface.php
 delete mode 100644 core/lib/Drupal/Core/Logger/LoggerChannel.php
 delete mode 100644 core/lib/Drupal/Core/Logger/LoggerChannelFactory.php
 delete mode 100644 core/lib/Drupal/Core/Logger/LoggerChannelFactoryInterface.php
 delete mode 100644 core/lib/Drupal/Core/Logger/LoggerChannelInterface.php
 delete mode 100644 core/modules/dblog/dblog.services.yml
 delete mode 100644 core/modules/dblog/lib/Drupal/dblog/Logger/DbLog.php
 delete mode 100644 core/modules/syslog/lib/Drupal/syslog/Logger/SysLog.php
 delete mode 100644 core/modules/syslog/syslog.services.yml
 delete mode 100644 core/tests/Drupal/Tests/Core/Logger/LogMessageParserTest.php
 delete mode 100644 core/tests/Drupal/Tests/Core/Logger/LoggerChannelFactoryTest.php
 delete mode 100644 core/tests/Drupal/Tests/Core/Logger/LoggerChannelTest.php

diff --git a/core/authorize.php b/core/authorize.php
index f938f3903324..f2da377aa8e7 100644
--- a/core/authorize.php
+++ b/core/authorize.php
@@ -147,7 +147,7 @@ function authorize_access_allowed() {
 }
 else {
   drupal_add_http_header('Status', '403 Forbidden');
-  watchdog('access denied', 'authorize.php', array(), WATCHDOG_WARNING);
+  watchdog('access denied', 'authorize.php', NULL, WATCHDOG_WARNING);
   $page_title = t('Access denied');
   $output = t('You are not allowed to access this page.');
 }
diff --git a/core/core.services.yml b/core/core.services.yml
index dbaf1e1f4089..92b5f7c78fb5 100644
--- a/core/core.services.yml
+++ b/core/core.services.yml
@@ -142,18 +142,6 @@ services:
     arguments: ['@serialization.phpserialize', '@database']
     tags:
       - { name: needs_destruction }
-  logger.factory:
-    class: Drupal\Core\Logger\LoggerChannelFactory
-    parent: container.trait
-    tags:
-      - { name: service_collector, tag: logger, call: addLogger }
-  logger.channel.default:
-    class: Drupal\Core\Logger\LoggerChannel
-    factory_method: get
-    factory_service: logger.factory
-    arguments: ['system']
-  logger.log_message_parser:
-    class: Drupal\Core\Logger\LogMessageParser
 
   serialization.json:
     class: Drupal\Component\Serialization\Json
@@ -270,7 +258,6 @@ services:
     arguments: ['@service_container']
   controller_resolver:
     class: Drupal\Core\Controller\ControllerResolver
-    arguments: ['@logger.channel.default']
     parent: container.trait
   title_resolver:
     class: Drupal\Core\Controller\TitleResolver
@@ -343,7 +330,7 @@ services:
       - { name: service_collector, tag: route_filter, call: addRouteFilter }
   url_generator:
     class: Drupal\Core\Routing\UrlGenerator
-    arguments: ['@router.route_provider', '@path_processor_manager', '@route_processor_manager', '@config.factory', '@settings', '@logger.channel.default']
+    arguments: ['@router.route_provider', '@path_processor_manager', '@route_processor_manager', '@config.factory', '@settings']
     calls:
       - [setRequest, ['@?request']]
       - [setContext, ['@?router.request_context']]
diff --git a/core/includes/bootstrap.inc b/core/includes/bootstrap.inc
index ac209926e3f1..d33d1ee55964 100644
--- a/core/includes/bootstrap.inc
+++ b/core/includes/bootstrap.inc
@@ -1137,18 +1137,58 @@ function watchdog_exception($type, Exception $exception, $message = NULL, $varia
  * @param $link
  *   A link to associate with the message.
  *
- * @deprecated in Drupal 8.x-dev, will be removed before Drupal 8.0.
- *   Use \Drupal::logger($channel)->log($severity, $message, $context), or any
- *   of the shortcut methods of \Psr\Log\LoggerTrait.
- *
  * @see watchdog_severity_levels()
  * @see hook_watchdog()
  */
-function watchdog($type, $message, array $variables = array(), $severity = WATCHDOG_NOTICE, $link = NULL) {
-  if ($link) {
-    $variables['link'] = $link;
+function watchdog($type, $message, array $variables = NULL, $severity = WATCHDOG_NOTICE, $link = NULL) {
+  global $user, $base_root;
+
+  static $in_error_state = FALSE;
+
+  // It is possible that the error handling will itself trigger an error. In that case, we could
+  // end up in an infinite loop. To avoid that, we implement a simple static semaphore.
+  if (!$in_error_state && \Drupal::hasService('module_handler')) {
+    $in_error_state = TRUE;
+
+    // The user object may not exist in all conditions, so 0 is substituted if needed.
+    $user_uid = isset($user) ? $user->id() : 0;
+
+    // Prepare the fields to be logged
+    $log_entry = array(
+      'type'        => $type,
+      'message'     => $message,
+      'variables'   => $variables,
+      'severity'    => $severity,
+      'link'        => $link,
+      'user'        => $user,
+      'uid'         => $user_uid,
+      'request_uri' => '',
+      'referer'     => '',
+      'ip'          => '',
+      // Request time isn't accurate for long processes, use time() instead.
+      'timestamp'   => time(),
+    );
+
+    try {
+      $request = \Drupal::request();
+      $log_entry['request_uri'] = $request->getUri();
+      $log_entry['referer'] = $request->headers->get('Referer', '');
+      $log_entry['ip'] = $request->getClientIP();
+    }
+    catch (DependencyInjectionRuntimeException $e) {
+      // We are not in a request context.
+    }
+
+    // Call the logging hooks to log/process the message
+    foreach (\Drupal::moduleHandler()->getImplementations('watchdog') as $module) {
+      $function = $module . '_watchdog';
+      $function($log_entry);
+    }
+
+    // It is critical that the semaphore is only cleared here, in the parent
+    // watchdog() call (not outside the loop), to prevent recursive execution.
+    $in_error_state = FALSE;
   }
-  \Drupal::service('logger.factory')->get($type)->log($severity, $message, $variables);
 }
 
 /**
diff --git a/core/lib/Drupal.php b/core/lib/Drupal.php
index 83fe15fa49b3..5c724354fb1c 100644
--- a/core/lib/Drupal.php
+++ b/core/lib/Drupal.php
@@ -622,18 +622,4 @@ public static function isConfigSyncing() {
     return static::$container->get('config.installer')->isSyncing();
   }
 
-  /**
-   * Returns a channel logger object.
-   *
-   * @param string $channel
-   *   The name of the channel. Can be any string, but the general practice is
-   *   to use the name of the subsystem calling this.
-   *
-   * @return \Drupal\Core\Logger\LoggerChannelInterface
-   *   The logger for this channel.
-   */
-  public static function logger($channel) {
-    return static::$container->get('logger.factory')->get($channel);
-  }
-
 }
diff --git a/core/lib/Drupal/Core/Controller/ControllerResolver.php b/core/lib/Drupal/Core/Controller/ControllerResolver.php
index c80242c87f74..c37ed834d938 100644
--- a/core/lib/Drupal/Core/Controller/ControllerResolver.php
+++ b/core/lib/Drupal/Core/Controller/ControllerResolver.php
@@ -7,9 +7,9 @@
 
 namespace Drupal\Core\Controller;
 
-use Psr\Log\LoggerInterface;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpKernel\Controller\ControllerResolver as BaseControllerResolver;
+use Symfony\Component\HttpKernel\Log\LoggerInterface;
 use Symfony\Component\DependencyInjection\ContainerAwareInterface;
 use Symfony\Component\DependencyInjection\ContainerAwareTrait;
 
@@ -42,7 +42,7 @@ class ControllerResolver extends BaseControllerResolver implements ControllerRes
   /**
    * Constructs a new ControllerResolver.
    *
-   * @param \Psr\Log\LoggerInterface $logger
+   * @param \Symfony\Component\HttpKernel\Log\LoggerInterface $logger
    *   (optional) A LoggerInterface instance.
    */
   public function __construct(LoggerInterface $logger = NULL) {
diff --git a/core/lib/Drupal/Core/Controller/ExceptionController.php b/core/lib/Drupal/Core/Controller/ExceptionController.php
index 320cb064be0d..f95930b3074f 100644
--- a/core/lib/Drupal/Core/Controller/ExceptionController.php
+++ b/core/lib/Drupal/Core/Controller/ExceptionController.php
@@ -143,7 +143,7 @@ public function on405Html(FlattenException $exception, Request $request) {
    */
   public function on403Html(FlattenException $exception, Request $request) {
     $system_path = $request->attributes->get('_system_path');
-    watchdog('access denied', $system_path, array(), WATCHDOG_WARNING);
+    watchdog('access denied', $system_path, NULL, WATCHDOG_WARNING);
 
     $system_config = $this->container->get('config.factory')->get('system.site');
     $path = $this->container->get('path.alias_manager')->getPathByAlias($system_config->get('page.403'));
@@ -185,7 +185,7 @@ public function on403Html(FlattenException $exception, Request $request) {
    *   A response object.
    */
   public function on404Html(FlattenException $exception, Request $request) {
-    watchdog('page not found', String::checkPlain($request->attributes->get('_system_path')), array(), WATCHDOG_WARNING);
+    watchdog('page not found', String::checkPlain($request->attributes->get('_system_path')), NULL, WATCHDOG_WARNING);
 
     // Check for and return a fast 404 page if configured.
     $config = \Drupal::config('system.performance');
diff --git a/core/lib/Drupal/Core/Form/FormValidator.php b/core/lib/Drupal/Core/Form/FormValidator.php
index eda8238a47ea..9e73738f14b1 100644
--- a/core/lib/Drupal/Core/Form/FormValidator.php
+++ b/core/lib/Drupal/Core/Form/FormValidator.php
@@ -502,7 +502,7 @@ public function getAnyErrors() {
   /**
    * Wraps watchdog().
    */
-  protected function watchdog($type, $message, array $variables = array(), $severity = WATCHDOG_NOTICE, $link = NULL) {
+  protected function watchdog($type, $message, array $variables = NULL, $severity = WATCHDOG_NOTICE, $link = NULL) {
     watchdog($type, $message, $variables, $severity, $link);
   }
 
diff --git a/core/lib/Drupal/Core/Logger/LogMessageParser.php b/core/lib/Drupal/Core/Logger/LogMessageParser.php
deleted file mode 100644
index ba991299eccd..000000000000
--- a/core/lib/Drupal/Core/Logger/LogMessageParser.php
+++ /dev/null
@@ -1,46 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\Core\Logger\LogMessageParser.
- */
-
-namespace Drupal\Core\Logger;
-
-/**
- * Parses log messages and their placeholders.
- */
-class LogMessageParser implements LogMessageParserInterface {
-
-  /**
-   * {@inheritdoc}
-   */
-  public function parseMessagePlaceholders(&$message, array &$context) {
-    $variables = array();
-    $has_psr3 = FALSE;
-    if (($start = strpos($message, '{')) !== FALSE && strpos($message, '}') > $start) {
-      $has_psr3 = TRUE;
-      // Transform PSR3 style messages containing placeholders to
-      // \Drupal\Component\Utility\String::format() style.
-      $message = preg_replace('/\{(.*)\}/U', '@$1', $message);
-    }
-    foreach ($context as $key => $variable) {
-      // PSR3 style placeholders.
-      if ($has_psr3) {
-        // Keys are not prefixed with anything according to PSR3 specs.
-        // If the message is "User {username} created" the variable key will be
-        // just "username".
-        if (strpos($message, '@' . $key) !== FALSE) {
-          $key = '@' . $key;
-        }
-      }
-      if (!empty($key) && ($key[0] === '@' || $key[0] === '%' || $key[0] === '!')) {
-        // The key is now in \Drupal\Component\Utility\String::format() style.
-        $variables[$key] = $variable;
-      }
-    }
-
-    return $variables;
-  }
-
-}
diff --git a/core/lib/Drupal/Core/Logger/LogMessageParserInterface.php b/core/lib/Drupal/Core/Logger/LogMessageParserInterface.php
deleted file mode 100644
index 545b03984371..000000000000
--- a/core/lib/Drupal/Core/Logger/LogMessageParserInterface.php
+++ /dev/null
@@ -1,39 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\Core\Logger\LogMessageParserInterface.
- */
-
-namespace Drupal\Core\Logger;
-
-/**
- * Defines an interface for parsing log messages and their placeholders.
- */
-interface LogMessageParserInterface {
-
-  /**
-   * Parses and transforms message and its placeholders to a common format.
-   *
-   * For a value to be considered as a placeholder should be in the following
-   * formats:
-   *   - PSR3 format:
-   *     @see https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-3-logger-interface.md#12-message
-   *   - Drupal specific string placeholder format:
-   *     @see \Drupal\Component\Utility\String::format()
-   *
-   * Values in PSR3 format will be transformed to String::format() format.
-   *
-   * @param string $message
-   *   The message that contains the placeholders.
-   *   If the message is in PSR3 style, it will be transformed to
-   *   \Drupal\Component\Utility\String::format() style.
-   * @param array $context
-   *   An array that may or may not contain placeholder variables.
-   *
-   * @return array
-   *   An array of the extracted message placeholders.
-   */
-  public function parseMessagePlaceholders(&$message, array &$context);
-
-}
diff --git a/core/lib/Drupal/Core/Logger/LoggerChannel.php b/core/lib/Drupal/Core/Logger/LoggerChannel.php
deleted file mode 100644
index 074cd23dd150..000000000000
--- a/core/lib/Drupal/Core/Logger/LoggerChannel.php
+++ /dev/null
@@ -1,158 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\Core\Logger\LoggerChannel.
- */
-
-namespace Drupal\Core\Logger;
-
-use Drupal\Core\Session\AccountInterface;
-use Psr\Log\LoggerInterface;
-use Psr\Log\LoggerTrait;
-use Psr\Log\LogLevel;
-use Symfony\Component\HttpFoundation\Request;
-
-/**
- * Defines a logger channel that most implementations will use.
- */
-class LoggerChannel implements LoggerChannelInterface {
-  use LoggerTrait;
-
-  /**
-   * The name of the channel of this logger instance.
-   *
-   * @var string
-   */
-  protected $channel;
-
-  /**
-   * Map of PSR Log constants to Watchdog log constants.
-   *
-   * @todo Move watchdog constants here when watchdog() is removed.
-   *
-   * @var array
-   */
-  protected $levelTranslation = array(
-    LogLevel::EMERGENCY => WATCHDOG_EMERGENCY,
-    LogLevel::ALERT => WATCHDOG_ALERT,
-    LogLevel::CRITICAL => WATCHDOG_CRITICAL,
-    LogLevel::ERROR => WATCHDOG_ERROR,
-    LogLevel::WARNING => WATCHDOG_WARNING,
-    LogLevel::NOTICE => WATCHDOG_NOTICE,
-    LogLevel::INFO => WATCHDOG_INFO,
-    LogLevel::DEBUG => WATCHDOG_DEBUG,
-  );
-
-  /**
-   * An array of arrays of \Psr\Log\LoggerInterface keyed by priority.
-   *
-   * @var array
-   */
-  protected $loggers = array();
-
-  /**
-   * The request object.
-   *
-   * @var \Symfony\Component\HttpFoundation\Request
-   */
-  protected $request;
-
-  /**
-   * The current user object.
-   *
-   * @var \Drupal\Core\Session\AccountInterface
-   */
-  protected $currentUser;
-
-  /**
-   * Constructs a LoggerChannel object
-   *
-   * @param string $channel
-   *   The channel name for this instance.
-   */
-  public function __construct($channel) {
-    $this->channel = $channel;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function log($level, $message, array $context = array()) {
-    // Merge in defaults.
-    $context += array(
-      'channel' => $this->channel,
-      'link' => '',
-      'user' => NULL,
-      'uid' => 0,
-      'request_uri' => '',
-      'referer' => '',
-      'ip' => '',
-      'timestamp' => time(),
-    );
-    if ($this->currentUser) {
-      $context['user'] = $this->currentUser;
-      $context['uid'] = $this->currentUser->id();
-    }
-    // Some context values are only available when in a request context.
-    if ($this->request) {
-      $context['request_uri'] = $this->request->getUri();
-      $context['referer'] = $this->request->headers->get('Referer', '');
-      $context['ip'] = $this->request->getClientIP();
-    }
-
-    if (is_string($level)) {
-      // Convert to integer equivalent for consistency with RFC 3164.
-      $level = $this->levelTranslation[$level];
-    }
-    // Call all available loggers.
-    foreach ($this->sortLoggers() as $logger) {
-      $logger->log($level, $message, $context);
-    }
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function setRequest(Request $request = NULL) {
-    $this->request = $request;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function setCurrentUser(AccountInterface $current_user = NULL) {
-    $this->currentUser = $current_user;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function setLoggers(array $loggers) {
-    $this->loggers = $loggers;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function addLogger(LoggerInterface $logger, $priority = 0) {
-    $this->loggers[$priority][] = $logger;
-  }
-
-  /**
-   * Sorts loggers according to priority.
-   *
-   * @return array
-   *   An array of sorted loggers by priority.
-   */
-  protected function sortLoggers() {
-    $sorted = array();
-    krsort($this->loggers);
-
-    foreach ($this->loggers as $loggers) {
-      $sorted = array_merge($sorted, $loggers);
-    }
-    return $sorted;
-  }
-
-}
diff --git a/core/lib/Drupal/Core/Logger/LoggerChannelFactory.php b/core/lib/Drupal/Core/Logger/LoggerChannelFactory.php
deleted file mode 100644
index 1ec171002d5c..000000000000
--- a/core/lib/Drupal/Core/Logger/LoggerChannelFactory.php
+++ /dev/null
@@ -1,74 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\Core\Logger\LoggerChannelFactory.
- */
-
-namespace Drupal\Core\Logger;
-
-use Psr\Log\LoggerInterface;
-use Symfony\Component\DependencyInjection\ContainerAwareInterface;
-use Symfony\Component\DependencyInjection\ContainerAwareTrait;
-use Symfony\Component\DependencyInjection\Exception\RuntimeException;
-
-/**
- * Defines a factory for logging channels.
- */
-class LoggerChannelFactory implements LoggerChannelFactoryInterface, ContainerAwareInterface {
-  use ContainerAwareTrait;
-
-  /**
-   * Array of all instantiated logger channels keyed by channel name.
-   *
-   * @var Drupal\Core\Logger\LoggerChannelInterface[]
-   */
-  protected $channels = array();
-
-  /**
-   * An array of arrays of \Psr\Log\LoggerInterface keyed by priority.
-   *
-   * @var array
-   */
-  protected $loggers = array();
-
-  /**
-   * {@inheritdoc}
-   */
-  public function get($channel) {
-    if (!isset($this->channels[$channel])) {
-      $instance = new LoggerChannel($channel);
-
-      // If the service container is set and request is available, set it with
-      // the current user to the channel.
-      if ($this->container) {
-        try {
-          $instance->setRequest($this->container->get('request'));
-          $instance->setCurrentUser($this->container->get('current_user'));
-        }
-        catch (RuntimeException $e) {
-          // We are not in a request context.
-        }
-      }
-
-      // Pass the loggers to the channel.
-      $instance->setLoggers($this->loggers);
-      $this->channels[$channel] = $instance;
-    }
-
-    return $this->channels[$channel];
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function addLogger(LoggerInterface $logger, $priority = 0) {
-    // Store it so we can pass it to potential new logger instances.
-    $this->loggers[$priority][] = $logger;
-    // Add the logger to already instantiated channels.
-    foreach ($this->channels as $channel) {
-      $channel->addLogger($logger, $priority);
-    }
-  }
-
-}
diff --git a/core/lib/Drupal/Core/Logger/LoggerChannelFactoryInterface.php b/core/lib/Drupal/Core/Logger/LoggerChannelFactoryInterface.php
deleted file mode 100644
index 67d178ccb1ea..000000000000
--- a/core/lib/Drupal/Core/Logger/LoggerChannelFactoryInterface.php
+++ /dev/null
@@ -1,40 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\Core\Logger\LoggerChannelFactoryInterface.
- */
-
-namespace Drupal\Core\Logger;
-
-use Psr\Log\LoggerInterface;
-
-/**
- * Logger channel factory interface.
- */
-interface LoggerChannelFactoryInterface {
-
-  /**
-   * Retrieves the registered logger for the requested channel.
-   *
-   * @return \Drupal\Core\Logger\LoggerChannelInterface
-   *   The registered logger for this channel.
-   */
-  public function get($channel);
-
-  /**
-   * Adds a logger.
-   *
-   * Here is were all services tagged as 'logger' are being retrieved and then
-   * passed to the channels after instantiation.
-   *
-   * @param \Psr\Log\LoggerInterface $logger
-   *   The PSR-3 logger to add.
-   * @param int $priority
-   *   The priority of the logger being added.
-   *
-   * @see \Drupal\Core\DependencyInjection\Compiler\RegisterLoggersPass
-   */
-  public function addLogger(LoggerInterface $logger, $priority = 0);
-
-}
diff --git a/core/lib/Drupal/Core/Logger/LoggerChannelInterface.php b/core/lib/Drupal/Core/Logger/LoggerChannelInterface.php
deleted file mode 100644
index 15d974141356..000000000000
--- a/core/lib/Drupal/Core/Logger/LoggerChannelInterface.php
+++ /dev/null
@@ -1,53 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\Core\Logger\LoggerChannelInterface.
- */
-
-namespace Drupal\Core\Logger;
-
-use Drupal\Core\Session\AccountInterface;
-use Psr\Log\LoggerInterface;
-use Symfony\Component\HttpFoundation\Request;
-
-/**
- * Logger channel interface.
- */
-interface LoggerChannelInterface extends LoggerInterface {
-
-  /**
-   * Sets the request.
-   *
-   * @param \Symfony\Component\HttpFoundation\Request|null $request
-   *   The current request object.
-   */
-  public function setRequest(Request $request = NULL);
-
-  /**
-   * Sets the current user.
-   *
-   * @param \Drupal\Core\Session\AccountInterface|null $current_user
-   *   The current user object.
-   */
-  public function setCurrentUser(AccountInterface $current_user = NULL);
-
-  /**
-   * Sets the loggers for this channel.
-   *
-   * @param array $loggers
-   *   An array of arrays of \Psr\Log\LoggerInterface keyed by priority.
-   */
-  public function setLoggers(array $loggers);
-
-  /**
-   * Adds a logger.
-   *
-   * @param \Psr\Log\LoggerInterface $logger
-   *   The PSR-3 logger to add.
-   * @param int $priority
-   *   The priority of the logger being added.
-   */
-  public function addLogger(LoggerInterface $logger, $priority = 0);
-
-}
diff --git a/core/lib/Drupal/Core/Routing/UrlGenerator.php b/core/lib/Drupal/Core/Routing/UrlGenerator.php
index 7028101f622f..dd09330435a9 100644
--- a/core/lib/Drupal/Core/Routing/UrlGenerator.php
+++ b/core/lib/Drupal/Core/Routing/UrlGenerator.php
@@ -7,8 +7,8 @@
 
 namespace Drupal\Core\Routing;
 
-use Psr\Log\LoggerInterface;
 use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpKernel\Log\LoggerInterface;
 
 use Symfony\Component\Routing\Route as SymfonyRoute;
 use Symfony\Component\Routing\Exception\RouteNotFoundException;
@@ -88,7 +88,7 @@ class UrlGenerator extends ProviderBasedGenerator implements UrlGeneratorInterfa
    *    The config factory.
    * @param \Drupal\Core\Site\Settings $settings
    *    The read only settings.
-   * @param \Psr\Log\LoggerInterface $logger
+   * @param \Symfony\Component\HttpKernel\Log\LoggerInterface $logger
    *   An optional logger for recording errors.
    */
   public function __construct(RouteProviderInterface $provider, OutboundPathProcessorInterface $path_processor, OutboundRouteProcessorInterface $route_processor, ConfigFactoryInterface $config, Settings $settings, LoggerInterface $logger = NULL) {
diff --git a/core/modules/config/lib/Drupal/config/Form/ConfigSync.php b/core/modules/config/lib/Drupal/config/Form/ConfigSync.php
index b76e69064395..9786fb949427 100644
--- a/core/modules/config/lib/Drupal/config/Form/ConfigSync.php
+++ b/core/modules/config/lib/Drupal/config/Form/ConfigSync.php
@@ -348,7 +348,7 @@ public static function finishBatch($success, $results, $operations) {
       if (!empty($results['errors'])) {
         foreach ($results['errors'] as $error) {
           drupal_set_message($error, 'error');
-          watchdog('config_sync', $error, array(), WATCHDOG_ERROR);
+          watchdog('config_sync', $error, NULL, WATCHDOG_ERROR);
         }
         drupal_set_message(\Drupal::translation()->translate('The configuration was imported with errors.'), 'warning');
       }
diff --git a/core/modules/dblog/dblog.module b/core/modules/dblog/dblog.module
index 1eb61b015453..56ce643b1950 100644
--- a/core/modules/dblog/dblog.module
+++ b/core/modules/dblog/dblog.module
@@ -11,6 +11,7 @@
  * @see watchdog()
  */
 
+use Drupal\Core\Database\Database;
 use Symfony\Component\HttpFoundation\Request;
 
 /**
@@ -106,6 +107,31 @@ function _dblog_get_message_types() {
   return array_combine($types, $types);
 }
 
+/**
+ * Implements hook_watchdog().
+ *
+ * Note: Some values may be truncated to meet database column size restrictions.
+ */
+function dblog_watchdog(array $log_entry) {
+  // Remove any backtraces since they may contain an unserializable variable.
+  unset($log_entry['variables']['backtrace']);
+
+  Database::getConnection('default', 'default')->insert('watchdog')
+    ->fields(array(
+      'uid' => $log_entry['uid'],
+      'type' => substr($log_entry['type'], 0, 64),
+      'message' => $log_entry['message'],
+      'variables' => serialize($log_entry['variables']),
+      'severity' => $log_entry['severity'],
+      'link' => substr($log_entry['link'], 0, 255),
+      'location' => $log_entry['request_uri'],
+      'referer' => $log_entry['referer'],
+      'hostname' => substr($log_entry['ip'], 0, 128),
+      'timestamp' => $log_entry['timestamp'],
+    ))
+    ->execute();
+}
+
 /**
  * Implements hook_form_FORM_ID_alter() for system_logging_settings().
  */
diff --git a/core/modules/dblog/dblog.services.yml b/core/modules/dblog/dblog.services.yml
deleted file mode 100644
index 38836e16338f..000000000000
--- a/core/modules/dblog/dblog.services.yml
+++ /dev/null
@@ -1,6 +0,0 @@
-services:
-  logger.dblog:
-    class: Drupal\dblog\Logger\DbLog
-    arguments: ['@database', '@logger.log_message_parser']
-    tags:
-      - { name: logger }
diff --git a/core/modules/dblog/lib/Drupal/dblog/Logger/DbLog.php b/core/modules/dblog/lib/Drupal/dblog/Logger/DbLog.php
deleted file mode 100644
index 14916b351ceb..000000000000
--- a/core/modules/dblog/lib/Drupal/dblog/Logger/DbLog.php
+++ /dev/null
@@ -1,76 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\dblog\Logger\DbLog.
- */
-
-namespace Drupal\dblog\Logger;
-
-use Drupal\Core\Database\Connection;
-use Drupal\Core\Logger\LogMessageParserInterface;
-use Psr\Log\LoggerInterface;
-use Psr\Log\LoggerTrait;
-
-/**
- * Logs events in the watchdog database table.
- */
-class DbLog implements LoggerInterface {
-  use LoggerTrait;
-
-  /**
-   * The database connection object.
-   *
-   * @var \Drupal\Core\Database\Connection
-   */
-  protected $database;
-
-  /**
-   * The message's placeholders parser.
-   *
-   * @var \Drupal\Core\Logger\LogMessageParserInterface
-   */
-  protected $parser;
-
-  /**
-   * Constructs a DbLog object.
-   *
-   * @param \Drupal\Core\Database\Connection $database
-   *   The database connection object.
-   * @param \Drupal\Core\Logger\LogMessageParserInterface $parser
-   *   The parser to use when extracting message variables.
-   */
-  public function __construct(Connection $database, LogMessageParserInterface $parser) {
-    $this->database = $database;
-    $this->parser = $parser;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function log($level, $message, array $context = array()) {
-    // Remove any backtraces since they may contain an unserializable variable.
-    unset($context['backtrace']);
-
-    // Convert PSR3-style messages to String::format() style, so they can be
-    // translated too in runtime.
-    $message_placeholders = $this->parser->parseMessagePlaceholders($message, $context);
-
-    $this->database
-      ->insert('watchdog')
-      ->fields(array(
-        'uid' => $context['uid'],
-        'type' => substr($context['channel'], 0, 64),
-        'message' => $message,
-        'variables' => serialize($message_placeholders),
-        'severity' => $level,
-        'link' => substr($context['link'], 0, 255),
-        'location' => $context['request_uri'],
-        'referer' => $context['referer'],
-        'hostname' => substr($context['ip'], 0, 128),
-        'timestamp' => $context['timestamp'],
-      ))
-      ->execute();
-  }
-
-}
diff --git a/core/modules/dblog/lib/Drupal/dblog/Tests/DbLogTest.php b/core/modules/dblog/lib/Drupal/dblog/Tests/DbLogTest.php
index 84c05cfd7c59..5b93c34a01ec 100644
--- a/core/modules/dblog/lib/Drupal/dblog/Tests/DbLogTest.php
+++ b/core/modules/dblog/lib/Drupal/dblog/Tests/DbLogTest.php
@@ -130,7 +130,7 @@ private function generateLogEntries($count, $type = 'custom', $severity = WATCHD
 
     // Prepare the fields to be logged
     $log = array(
-      'channel'     => $type,
+      'type'        => $type,
       'message'     => 'Log entry added to test the dblog row limit.',
       'variables'   => array(),
       'severity'    => $severity,
@@ -145,7 +145,7 @@ private function generateLogEntries($count, $type = 'custom', $severity = WATCHD
     $message = 'Log entry added to test the dblog row limit. Entry #';
     for ($i = 0; $i < $count; $i++) {
       $log['message'] = $message . $i;
-      $this->container->get('logger.dblog')->log($severity, $log['message'], $log);
+      dblog_watchdog($log);
     }
   }
 
@@ -413,7 +413,7 @@ protected function testDBLogAddAndClear() {
     // Get a count of how many watchdog entries already exist.
     $count = db_query('SELECT COUNT(*) FROM {watchdog}')->fetchField();
     $log = array(
-      'channel'     => 'system',
+      'type'        => 'custom',
       'message'     => 'Log entry added to test the doClearTest clear down.',
       'variables'   => array(),
       'severity'    => WATCHDOG_NOTICE,
@@ -426,7 +426,7 @@ protected function testDBLogAddAndClear() {
       'timestamp'   => REQUEST_TIME,
     );
     // Add a watchdog entry.
-    $this->container->get('logger.dblog')->log($log['severity'], $log['message'], $log);
+    dblog_watchdog($log);
     // Make sure the table count has actually been incremented.
     $this->assertEqual($count + 1, db_query('SELECT COUNT(*) FROM {watchdog}')->fetchField(), format_string('dblog_watchdog() added an entry to the dblog :count', array(':count' => $count)));
     // Login the admin user.
diff --git a/core/modules/filter/lib/Drupal/filter/Tests/FilterSettingsTest.php b/core/modules/filter/lib/Drupal/filter/Tests/FilterSettingsTest.php
index f37d48b9f934..a11db5dad937 100644
--- a/core/modules/filter/lib/Drupal/filter/Tests/FilterSettingsTest.php
+++ b/core/modules/filter/lib/Drupal/filter/Tests/FilterSettingsTest.php
@@ -34,11 +34,13 @@ public static function getInfo() {
    */
   function testFilterDefaults() {
     $filter_info = $this->container->get('plugin.manager.filter')->getDefinitions();
+    $filters = array_fill_keys(array_keys($filter_info), array());
 
     // Create text format using filter default settings.
     $filter_defaults_format = entity_create('filter_format', array(
       'format' => 'filter_defaults',
       'name' => 'Filter defaults',
+      'filters' => $filters,
     ));
     $filter_defaults_format->save();
 
diff --git a/core/modules/rest/lib/Drupal/rest/Tests/DBLogTest.php b/core/modules/rest/lib/Drupal/rest/Tests/DBLogTest.php
index ca3806e44fd4..b4f1779fd8e0 100644
--- a/core/modules/rest/lib/Drupal/rest/Tests/DBLogTest.php
+++ b/core/modules/rest/lib/Drupal/rest/Tests/DBLogTest.php
@@ -41,9 +41,9 @@ public function setUp() {
    */
   public function testWatchdog() {
     // Write a log message to the DB.
-    watchdog('rest', 'Test message');
+    watchdog('rest_test', 'Test message');
     // Get the ID of the written message.
-    $id = db_query_range("SELECT wid FROM {watchdog} WHERE type = :type ORDER BY wid DESC", 0, 1, array(':type' => 'rest'))
+    $id = db_query_range("SELECT wid FROM {watchdog} WHERE type = :type ORDER BY wid DESC", 0, 1, array(':type' => 'rest_test'))
       ->fetchField();
 
     // Create a user account that has the required permissions to read
@@ -56,7 +56,7 @@ public function testWatchdog() {
     $this->assertHeader('content-type', $this->defaultMimeType);
     $log = Json::decode($response);
     $this->assertEqual($log['wid'], $id, 'Log ID is correct.');
-    $this->assertEqual($log['type'], 'rest', 'Type of log message is correct.');
+    $this->assertEqual($log['type'], 'rest_test', 'Type of log message is correct.');
     $this->assertEqual($log['message'], 'Test message', 'Log message text is correct.');
 
     // Request an unknown log entry.
diff --git a/core/modules/syslog/lib/Drupal/syslog/Logger/SysLog.php b/core/modules/syslog/lib/Drupal/syslog/Logger/SysLog.php
deleted file mode 100644
index 8dbb6189305e..000000000000
--- a/core/modules/syslog/lib/Drupal/syslog/Logger/SysLog.php
+++ /dev/null
@@ -1,96 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\syslog\Logger\SysLog.
- */
-
-namespace Drupal\syslog\Logger;
-
-use Drupal\Core\Config\ConfigFactory;
-use Drupal\Core\Logger\LogMessageParserInterface;
-use Psr\Log\LoggerInterface;
-use Psr\Log\LoggerTrait;
-
-/**
- * Redirects logging messages to syslog.
- */
-class SysLog implements LoggerInterface {
-  use LoggerTrait;
-
-  /**
-   * A configuration object containin syslog settings.
-   *
-   * @var \Drupal\Core\Config\Config
-   */
-  protected $config;
-
-  /**
-   * The message's placeholders parser.
-   *
-   * @var \Drupal\Core\Logger\LogMessageParserInterface
-   */
-  protected $parser;
-
-  /**
-   * Stores whether there is a system logger connection opened or not.
-   *
-   * @var bool
-   */
-  protected $connectionOpened = FALSE;
-
-  /**
-   * Constructs a SysLog object.
-   *
-   * @param \Drupal\Core\Config\ConfigFactory $config_factory
-   *   The configuration factory object.
-   * @param \Drupal\Core\Logger\LogMessageParserInterface $parser
-   *   The parser to use when extracting message variables.
-   */
-  public function __construct(ConfigFactory $config_factory, LogMessageParserInterface $parser) {
-    $this->config = $config_factory->get('syslog.settings');
-    $this->parser = $parser;
-  }
-
-  /**
-   * Opens a connection to the system logger.
-   */
-  protected function openConnection() {
-    if (!$this->connectionOpened) {
-      $facility = $this->config->get('facility');
-      if ($facility === '') {
-        $facility = defined('LOG_LOCAL0') ? LOG_LOCAL0 : LOG_USER;
-      }
-      $this->connectionOpened = openlog($this->config->get('identity'), LOG_NDELAY, $facility);
-    }
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function log($level, $message, array $context = array()) {
-    global $base_url;
-
-    // Ensure we have a connection available.
-    $this->openConnection();
-
-    // Populate the message placeholders and then replace them in the message.
-    $message_placeholders = $this->parser->parseMessagePlaceholders($message, $context);
-    $message = empty($message_placeholders) ? $message : strtr($message, $message_placeholders);
-
-    $entry = strtr($this->config->get('format'), array(
-      '!base_url' => $base_url,
-      '!timestamp' => $context['timestamp'],
-      '!type' => $context['channel'],
-      '!ip' => $context['ip'],
-      '!request_uri' => $context['request_uri'],
-      '!referer' => $context['referer'],
-      '!uid' => $context['uid'],
-      '!link' => strip_tags($context['link']),
-      '!message' => strip_tags($message),
-    ));
-
-    syslog($level, $entry);
-  }
-
-}
diff --git a/core/modules/syslog/syslog.module b/core/modules/syslog/syslog.module
index aff3d5680801..ba54118e577c 100644
--- a/core/modules/syslog/syslog.module
+++ b/core/modules/syslog/syslog.module
@@ -89,3 +89,36 @@ function syslog_facility_list() {
     LOG_LOCAL7 => 'LOG_LOCAL7',
   );
 }
+
+/**
+ * Implements hook_watchdog().
+ */
+function syslog_watchdog(array $log_entry) {
+  global $base_url;
+
+  $log_init = &drupal_static(__FUNCTION__, FALSE);
+  $config = \Drupal::config('syslog.settings');
+
+  if (!$log_init) {
+    $log_init = TRUE;
+    $facility = $config->get('facility');
+    if ($facility === '') {
+      $facility = defined('LOG_LOCAL0') ? LOG_LOCAL0 : LOG_USER;
+    }
+    openlog($config->get('identity'), LOG_NDELAY, $facility);
+  }
+
+  $message = strtr($config->get('format'), array(
+    '!base_url'    => $base_url,
+    '!timestamp'   => $log_entry['timestamp'],
+    '!type'        => $log_entry['type'],
+    '!ip'          => $log_entry['ip'],
+    '!request_uri' => $log_entry['request_uri'],
+    '!referer'     => $log_entry['referer'],
+    '!uid'         => $log_entry['uid'],
+    '!link'        => strip_tags($log_entry['link']),
+    '!message'     => strip_tags(!isset($log_entry['variables']) ? $log_entry['message'] : strtr($log_entry['message'], $log_entry['variables'])),
+  ));
+
+  syslog($log_entry['severity'], $message);
+}
diff --git a/core/modules/syslog/syslog.services.yml b/core/modules/syslog/syslog.services.yml
deleted file mode 100644
index 78c7d38ec8f2..000000000000
--- a/core/modules/syslog/syslog.services.yml
+++ /dev/null
@@ -1,6 +0,0 @@
-services:
-  logger.syslog:
-    class: Drupal\syslog\Logger\SysLog
-    arguments: ['@config.factory', '@logger.log_message_parser']
-    tags:
-      - { name: logger }
diff --git a/core/modules/system/lib/Drupal/system/Tests/Entity/EntityApiInfoTest.php b/core/modules/system/lib/Drupal/system/Tests/Entity/EntityApiInfoTest.php
index 252fb0926e30..712b6285c635 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Entity/EntityApiInfoTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Entity/EntityApiInfoTest.php
@@ -48,9 +48,9 @@ function testEntityInfoChanges() {
   /**
    * Tests entity info cache after enabling a module with a dependency on an entity providing module.
    *
-   * @see entity_cache_test_modules_enabled()
+   * @see entity_cache_test_watchdog()
    */
-  function testEntityInfoCacheModulesEnabled() {
+  function testEntityInfoCacheWatchdog() {
     \Drupal::moduleHandler()->install(array('entity_cache_test'));
     $entity_type = \Drupal::state()->get('entity_cache_test');
     $this->assertEqual($entity_type->getLabel(), 'Entity Cache Test', 'Entity info label is correct.');
diff --git a/core/modules/system/lib/Drupal/system/Tests/Pager/PagerTest.php b/core/modules/system/lib/Drupal/system/Tests/Pager/PagerTest.php
index 845aa28d700c..dc8ead4abd24 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Pager/PagerTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Pager/PagerTest.php
@@ -36,7 +36,7 @@ function setUp() {
 
     // Insert 300 log messages.
     for ($i = 0; $i < 300; $i++) {
-      watchdog('pager_test', $this->randomString(), array(), WATCHDOG_DEBUG);
+      watchdog('pager_test', $this->randomString(), NULL, WATCHDOG_DEBUG);
     }
 
     $this->admin_user = $this->drupalCreateUser(array(
diff --git a/core/modules/system/system.api.php b/core/modules/system/system.api.php
index 15f893fdf2a5..c69838aeb5f3 100644
--- a/core/modules/system/system.api.php
+++ b/core/modules/system/system.api.php
@@ -1180,6 +1180,94 @@ function hook_template_preprocess_default_variables_alter(&$variables) {
   $variables['is_admin'] = user_access('access administration pages');
 }
 
+/**
+ * Log an event message.
+ *
+ * This hook allows modules to route log events to custom destinations, such as
+ * SMS, Email, pager, syslog, ...etc.
+ *
+ * @param array $log_entry
+ *   An associative array containing the following keys:
+ *   - type: The type of message for this entry.
+ *   - user: The user object for the user who was logged in when the event
+ *     happened.
+ *   - uid: The user ID for the user who was logged in when the event happened.
+ *   - request_uri: The request URI for the page the event happened in.
+ *   - referer: The page that referred the user to the page where the event
+ *     occurred.
+ *   - ip: The IP address where the request for the page came from.
+ *   - timestamp: The UNIX timestamp of the date/time the event occurred.
+ *   - severity: The severity of the message; one of the following values as
+ *     defined in @link http://www.faqs.org/rfcs/rfc3164.html RFC 3164: @endlink
+ *     - WATCHDOG_EMERGENCY: Emergency, system is unusable.
+ *     - WATCHDOG_ALERT: Alert, action must be taken immediately.
+ *     - WATCHDOG_CRITICAL: Critical conditions.
+ *     - WATCHDOG_ERROR: Error conditions.
+ *     - WATCHDOG_WARNING: Warning conditions.
+ *     - WATCHDOG_NOTICE: Normal but significant conditions.
+ *     - WATCHDOG_INFO: Informational messages.
+ *     - WATCHDOG_DEBUG: Debug-level messages.
+ *   - link: An optional link provided by the module that called the watchdog()
+ *     function.
+ *   - message: The text of the message to be logged. Variables in the message
+ *     are indicated by using placeholder strings alongside the variables
+ *     argument to declare the value of the placeholders. See t() for
+ *     documentation on how the message and variable parameters interact.
+ *   - variables: An array of variables to be inserted into the message on
+ *     display. Will be NULL or missing if a message is already translated or if
+ *     the message is not possible to translate.
+ */
+function hook_watchdog(array $log_entry) {
+  global $base_url;
+  $language_interface = \Drupal::languageManager()->getCurrentLanguage();
+
+  $severity_list = array(
+    WATCHDOG_EMERGENCY     => t('Emergency'),
+    WATCHDOG_ALERT     => t('Alert'),
+    WATCHDOG_CRITICAL     => t('Critical'),
+    WATCHDOG_ERROR       => t('Error'),
+    WATCHDOG_WARNING   => t('Warning'),
+    WATCHDOG_NOTICE    => t('Notice'),
+    WATCHDOG_INFO      => t('Info'),
+    WATCHDOG_DEBUG     => t('Debug'),
+  );
+
+  $to = 'someone@example.com';
+  $params = array();
+  $params['subject'] = t('[@site_name] @severity_desc: Alert from your web site', array(
+    '@site_name' => \Drupal::config('system.site')->get('name'),
+    '@severity_desc' => $severity_list[$log_entry['severity']],
+  ));
+
+  $params['message']  = "\nSite:         @base_url";
+  $params['message'] .= "\nSeverity:     (@severity) @severity_desc";
+  $params['message'] .= "\nTimestamp:    @timestamp";
+  $params['message'] .= "\nType:         @type";
+  $params['message'] .= "\nIP Address:   @ip";
+  $params['message'] .= "\nRequest URI:  @request_uri";
+  $params['message'] .= "\nReferrer URI: @referer_uri";
+  $params['message'] .= "\nUser:         (@uid) @name";
+  $params['message'] .= "\nLink:         @link";
+  $params['message'] .= "\nMessage:      \n\n@message";
+
+  $params['message'] = t($params['message'], array(
+    '@base_url'      => $base_url,
+    '@severity'      => $log_entry['severity'],
+    '@severity_desc' => $severity_list[$log_entry['severity']],
+    '@timestamp'     => format_date($log_entry['timestamp']),
+    '@type'          => $log_entry['type'],
+    '@ip'            => $log_entry['ip'],
+    '@request_uri'   => $log_entry['request_uri'],
+    '@referer_uri'   => $log_entry['referer'],
+    '@uid'           => $log_entry['uid'],
+    '@name'          => $log_entry['user']->name,
+    '@link'          => strip_tags($log_entry['link']),
+    '@message'       => strip_tags($log_entry['message']),
+  ));
+
+  drupal_mail('emaillog', 'entry', $to, $language_interface->id, $params);
+}
+
 /**
  * Prepare a message based on parameters; called from drupal_mail().
  *
diff --git a/core/modules/system/tests/modules/entity_cache_test/entity_cache_test.module b/core/modules/system/tests/modules/entity_cache_test/entity_cache_test.module
index f91afde41fe1..9b288154e0b4 100644
--- a/core/modules/system/tests/modules/entity_cache_test/entity_cache_test.module
+++ b/core/modules/system/tests/modules/entity_cache_test/entity_cache_test.module
@@ -6,7 +6,7 @@
  */
 
 /**
- * Implements hook_modules_installed().
+ * Implements hook_watchdog().
  *
  * This hook is called during \Drupal\Core\Extension\ModuleHandler::install()
  * and since this hook implementation is invoked, we have to expect that this
@@ -14,11 +14,13 @@
  * expect to be able to retrieve the entity information that has been registered
  * by the required dependency module.
  *
- * @see EntityApiInfoTest::testEntityInfoCacheModulesEnabled()
+ * @see EnableDisableTestCase::testEntityCache()
  */
-function entity_cache_test_modules_installed($modules_enabled) {
-  $info = \Drupal::entityManager()->getDefinition('entity_cache_test');
-  // Store the information in a system variable to analyze it later in the
-  // test case.
-  \Drupal::state()->set('entity_cache_test', $info);
+function entity_cache_test_watchdog($log_entry) {
+  if ($log_entry['type'] == 'system' && $log_entry['message'] == '%module module installed.') {
+    $info = \Drupal::entityManager()->getDefinition('entity_cache_test');
+    // Store the information in a system variable to analyze it later in the
+    // test case.
+    \Drupal::state()->set('entity_cache_test', $info);
+  }
 }
diff --git a/core/tests/Drupal/Tests/Core/EventSubscriber/SpecialAttributesRouteSubscriberTest.php b/core/tests/Drupal/Tests/Core/EventSubscriber/SpecialAttributesRouteSubscriberTest.php
index 65ba07d3ba19..0bb50069c3cd 100644
--- a/core/tests/Drupal/Tests/Core/EventSubscriber/SpecialAttributesRouteSubscriberTest.php
+++ b/core/tests/Drupal/Tests/Core/EventSubscriber/SpecialAttributesRouteSubscriberTest.php
@@ -118,7 +118,7 @@ public function testOnRouteBuildingInvalidVariables(Route $route) {
 
 namespace {
   if (!function_exists('watchdog')) {
-    function watchdog($type, $message, array $args = array()) {
+    function watchdog($type, $message, array $args = NULL) {
     }
   }
   if (!function_exists('drupal_set_message')) {
diff --git a/core/tests/Drupal/Tests/Core/Form/FormBuilderTest.php b/core/tests/Drupal/Tests/Core/Form/FormBuilderTest.php
index 03ba5ebe8f16..8b09681f4043 100644
--- a/core/tests/Drupal/Tests/Core/Form/FormBuilderTest.php
+++ b/core/tests/Drupal/Tests/Core/Form/FormBuilderTest.php
@@ -446,7 +446,6 @@ public static function create(ContainerInterface $container) {
 namespace {
   function test_form_id_custom_submit(array &$form, array &$form_state) {
   }
-  // @todo Remove once watchdog() is removed.
   if (!defined('WATCHDOG_ERROR')) {
     define('WATCHDOG_ERROR', 3);
   }
diff --git a/core/tests/Drupal/Tests/Core/Logger/LogMessageParserTest.php b/core/tests/Drupal/Tests/Core/Logger/LogMessageParserTest.php
deleted file mode 100644
index e30f551a2647..000000000000
--- a/core/tests/Drupal/Tests/Core/Logger/LogMessageParserTest.php
+++ /dev/null
@@ -1,93 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\Tests\Core\Logger\LogMessageParserTraitTest
- */
-
-namespace Drupal\Tests\Core\Logger;
-
-use Drupal\Core\Logger\LogMessageParser;
-use Drupal\Tests\UnitTestCase;
-
-/**
- * Tests the log message parser.
- *
- * @see \Drupal\Core\Logger\LogMessageParser
- * @coversDefaultClass \Drupal\Core\Logger\LogMessageParser
- *
- * @group Drupal
- * @group Logger
- */
-class LogMessageParserTest extends UnitTestCase {
-
-  public static function getInfo() {
-    return array(
-      'name' => 'Log message parser',
-      'description' => 'Unit tests for the log message parser.',
-      'group' => 'Logger',
-    );
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  protected function setUp() {
-    $this->parser = new LogMessageParser();
-  }
-
-  /**
-   * Test for LogMessageParserTrait::parseMessagePlaceholders()
-   *
-   * @param array $value
-   *   An array containing:
-   *    - message: A string that contains a message with placeholders.
-   *    - context: An array with placeholder values.
-   * @param array $expected
-   *   An array with the expected values after the test has run.
-   *    - message: The expected parsed message.
-   *    - context: The expected values of the placeholders.
-   *
-   * @dataProvider providerTestParseMessagePlaceholders
-   * @covers ::parseMessagePlaceholders
-   */
-  public function testParseMessagePlaceholders(array $value, array $expected) {
-    $message_placeholders = $this->parser->parseMessagePlaceholders($value['message'], $value['context']);
-    $this->assertEquals($expected['message'], $value['message']);
-    $this->assertEquals($expected['context'], $message_placeholders);
-  }
-
-  /**
-   * Data provider for testParseMessagePlaceholders().
-   */
-  public function providerTestParseMessagePlaceholders() {
-    return array(
-      // PSR3 only message.
-      array(
-        array('message' => 'User {username} created', 'context' => array('username' => 'Dries')),
-        array('message' => 'User @username created', 'context' => array('@username' => 'Dries')),
-      ),
-      // PSR3 style mixed in a format_string style message.
-      array(
-        array('message' => 'User {username} created @time', 'context' => array('username' => 'Dries', '@time' => 'now')),
-        array('message' => 'User @username created @time', 'context' => array('@username' => 'Dries', '@time' => 'now')),
-      ),
-      // format_string style message only.
-      array(
-        array('message' => 'User @username created', 'context' => array('@username' => 'Dries')),
-        array('message' => 'User @username created', 'context' => array('@username' => 'Dries')),
-      ),
-      // Messsage without placeholders but wildcard characters.
-      array(
-        array('message' => 'User W-\\};~{&! created @', 'context' => array('' => '')),
-        array('message' => 'User W-\\};~{&! created @', 'context' => array()),
-      ),
-      // Messsage with double PSR3 style messages.
-      array(
-        array('message' => 'Test {with} two {encapsuled} strings', 'context' => array('with' => 'together', 'encapsuled' => 'awesome')),
-        array('message' => 'Test @with two @encapsuled strings', 'context' => array('@with' => 'together', '@encapsuled' => 'awesome')),
-      ),
-    );
-  }
-
-}
diff --git a/core/tests/Drupal/Tests/Core/Logger/LoggerChannelFactoryTest.php b/core/tests/Drupal/Tests/Core/Logger/LoggerChannelFactoryTest.php
deleted file mode 100644
index 82e20b2969d8..000000000000
--- a/core/tests/Drupal/Tests/Core/Logger/LoggerChannelFactoryTest.php
+++ /dev/null
@@ -1,66 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\Tests\Core\Logger\LoggerChannelFactoryTest
- */
-
-namespace Drupal\Tests\Logger;
-
-use Drupal\Core\Logger\LoggerChannelFactory;
-use Drupal\Core\Session\AccountInterface;
-use Drupal\Tests\UnitTestCase;
-use Symfony\Component\HttpFoundation\Request;
-
-// @todo Remove once watchdog() is removed.
-if (!defined('WATCHDOG_EMERGENCY')) {
-  define('WATCHDOG_EMERGENCY', 0);
-  define('WATCHDOG_ALERT', 1);
-  define('WATCHDOG_CRITICAL', 2);
-  define('WATCHDOG_WARNING', 4);
-  define('WATCHDOG_INFO', 6);
-  define('WATCHDOG_DEBUG', 7);
-}
-// WATCHDOG_NOTICE is also defined in FormValidatorTest, so check independently.
-if (!defined('WATCHDOG_NOTICE')) {
-  define('WATCHDOG_NOTICE', 5);
-}
-// WATCHDOG_ERROR is also defined in FormBuilderTest, so check independently.
-if (!defined('WATCHDOG_ERROR')) {
-  define('WATCHDOG_ERROR', 3);
-}
-
-/**
- * Tests the logger channel factory.
- *
- * @see \Drupal\Core\Logger\LoggerChannelFactory
- * @coversDefaultClass \Drupal\Core\Logger\LoggerChannelFactory
- *
- * @group Drupal
- * @group Logger
- */
-class LoggerChannelFactoryTest extends UnitTestCase {
-
-  public static function getInfo() {
-    return array(
-      'name' => 'Logger channel factory',
-      'description' => 'Unit tests for the logger channel factory object.',
-      'group' => 'Logger',
-    );
-  }
-
-  /**
-   * Tests LoggerChannelFactory::get().
-   *
-   * @covers ::get
-   */
-  public function testGet() {
-    $factory = new LoggerChannelFactory();
-    $factory->setContainer($this->getMock('Symfony\Component\DependencyInjection\ContainerInterface'));
-
-    // Ensure that when called with the same argument, always the same instance
-    // will be returned.
-    $this->assertEquals($factory->get('test'), $factory->get('test'));
-  }
-
-}
diff --git a/core/tests/Drupal/Tests/Core/Logger/LoggerChannelTest.php b/core/tests/Drupal/Tests/Core/Logger/LoggerChannelTest.php
deleted file mode 100644
index 2cc0a509430f..000000000000
--- a/core/tests/Drupal/Tests/Core/Logger/LoggerChannelTest.php
+++ /dev/null
@@ -1,158 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\Tests\Core\Logger\LoggerChannelTest
- */
-
-namespace Drupal\Tests\Logger;
-
-use Drupal\Core\Logger\LoggerChannel;
-use Drupal\Core\Session\AccountInterface;
-use Drupal\Tests\UnitTestCase;
-use Symfony\Component\HttpFoundation\Request;
-
-// @todo Remove once watchdog() is removed.
-if (!defined('WATCHDOG_EMERGENCY')) {
-  define('WATCHDOG_EMERGENCY', 0);
-  define('WATCHDOG_ALERT', 1);
-  define('WATCHDOG_CRITICAL', 2);
-  define('WATCHDOG_WARNING', 4);
-  define('WATCHDOG_INFO', 6);
-  define('WATCHDOG_DEBUG', 7);
-}
-// WATCHDOG_NOTICE is also defined in FormValidatorTest, so check independently.
-if (!defined('WATCHDOG_NOTICE')) {
-  define('WATCHDOG_NOTICE', 5);
-}
-// WATCHDOG_ERROR is also defined in FormBuilderTest, so check independently.
-if (!defined('WATCHDOG_ERROR')) {
-  define('WATCHDOG_ERROR', 3);
-}
-
-/**
- * Tests the logger channel.
- *
- * @see \Drupal\Core\Logger\LoggerChannel
- * @coversDefaultClass \Drupal\Core\Logger\LoggerChannel
- *
- * @group Drupal
- * @group Logger
- */
-class LoggerChannelTest extends UnitTestCase {
-
-  public static function getInfo() {
-    return array(
-      'name' => 'Logger channel',
-      'description' => 'Unit tests for the logger channel object.',
-      'group' => 'Logger',
-    );
-  }
-
-  /**
-   * Tests LoggerChannel::log().
-   *
-   * @param callable $expected
-   *   An anonymous function to use with $this->callback() of the logger mock.
-   *   The function should check the $context array for expected values.
-   * @param \Symfony\Component\HttpFoundation\Request $request
-   *   Will be passed to the channel under test if present.
-   * @param \Drupal\Core\Session\AccountInterface $current_user
-   *   Will be passed to the channel under test if present.
-   *
-   * @dataProvider providerTestLog
-   * @covers ::log
-   * @covers ::setCurrentUser
-   * @covers ::setRequest
-   */
-  public function testLog(callable $expected, Request $request = NULL, AccountInterface $current_user = NULL) {
-    $channel = new LoggerChannel('test');
-    $message = $this->randomName();
-    $logger = $this->getMock('Psr\Log\LoggerInterface');
-    $logger->expects($this->once())
-      ->method('log')
-      ->with($this->anything(), $message, $this->callback($expected));
-    $channel->addLogger($logger);
-    if ($request) {
-      $channel->setRequest($request);
-    }
-    if ($current_user) {
-      $channel->setCurrentUser($current_user);
-    }
-    $channel->log(rand(0, 7), $message);
-  }
-
-  /**
-   * Tests LoggerChannel::addLoggers().
-   *
-   * @covers ::addLogger
-   * @covers ::sortLoggers
-   */
-  public function testSortLoggers() {
-    $channel = new LoggerChannel($this->randomName());
-    $index_order = '';
-    for ($i = 0; $i < 4; $i++) {
-      $logger = $this->getMock('Psr\Log\LoggerInterface');
-      $logger->expects($this->once())
-        ->method('log')
-        ->will($this->returnCallback(function () use ($i, &$index_order) {
-          // Append the $i to the index order, so that we know the order that
-          // loggers got called with.
-          $index_order .= $i;
-        }));
-      $channel->addLogger($logger, $i);
-    }
-
-    $channel->log(rand(0, 7), $this->randomName());
-    // Ensure that the logger added in the end fired first.
-    $this->assertEquals($index_order, '3210');
-  }
-
-  /**
-   * Data provider for self::testLog().
-   */
-  public function providerTestLog() {
-    $account_mock = $this->getMock('Drupal\Core\Session\AccountInterface');
-    $account_mock->expects($this->exactly(2))
-      ->method('id')
-      ->will($this->returnValue(1));
-
-    $request_mock = $this->getMock('Symfony\Component\HttpFoundation\Request');
-    $request_mock->expects($this->exactly(2))
-      ->method('getClientIp')
-      ->will($this->returnValue('127.0.0.1'));
-    $request_mock->headers = $this->getMock('Symfony\Component\HttpFoundation\ParameterBag');
-
-    // No request or account.
-    $cases [] = array(
-      function ($context) {
-        return $context['channel'] == 'test' && empty($contex['uid']) && empty($context['ip']);
-      },
-    );
-    // With account but not request.
-    $cases [] = array(
-      function ($context) {
-        return $context['uid'] === 1 && empty($context['ip']);
-      },
-      NULL,
-      $account_mock,
-    );
-    // With request but not account.
-    $cases [] = array(
-      function ($context) {
-        return $context['ip'] === '127.0.0.1' && empty($contex['uid']);
-      },
-      $request_mock,
-    );
-    // Both request and account.
-    $cases [] = array(
-      function ($context) {
-        return $context['ip'] === '127.0.0.1' && $context['uid'] === 1;
-      },
-      $request_mock,
-      $account_mock,
-    );
-    return $cases;
-  }
-
-}
diff --git a/core/update.php b/core/update.php
index b6accf3a5f42..3bac378545eb 100644
--- a/core/update.php
+++ b/core/update.php
@@ -226,7 +226,7 @@ function update_info_page() {
 function update_access_denied_page() {
   drupal_add_http_header('Status', '403 Forbidden');
   header(\Drupal::request()->server->get('SERVER_PROTOCOL') . ' 403 Forbidden');
-  watchdog('access denied', 'update.php', array(), WATCHDOG_WARNING);
+  watchdog('access denied', 'update.php', NULL, WATCHDOG_WARNING);
   $output = '<p>Access denied. You are not authorized to access this page. Log in using either an account with the <em>administer software updates</em> permission or the site maintenance account (the account you created during installation). If you cannot log in, you will have to edit <code>settings.php</code> to bypass this access check. To do this:</p>
 <ol>
  <li>With a text editor find the settings.php file on your system. From the main Drupal directory that you installed all the files into, go to <code>sites/your_site_name</code> if such directory exists, or else to <code>sites/default</code> which applies otherwise.</li>
-- 
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