“Drupal is written in PHP, which is

uttterly offensive to people.”

H o r r i b l e T r u t h 1

“Drupal loads too much

code”

-rasmus

H o r r i b l e T r u t h 2

Is Drupal too Modular?

“Drupal is basically a 404 page to

which you can add modules””

H o r r i b l e T r u t h 4

drupal_bootstrap(DRUPAL_BOOTSTRAP_FULL);

index.phpincludes/bootstrap.inc - load necessary functionsdrupal_page_header() starts timer, sets up caching, module calloutincludes/common.inc - utility functions such as path formatting functions, form generation and validation, etc. fix_gpc_magic() sets $status 404 switch - case Not Found case Access Denied drupal_page_footer()

drupal_bootstrap(DRUPAL_BOOTSTRAP_FULL);

drupal_load()drupal_not_found();drupal_access_denied();drupal_site_offline();

$return = menu_execute_active_handler();print theme('page', $return);

drupal_page_footer();

What's on the menu api?

MENU_CALLBACK

MENU_DEFAULT_LOCAL_TASK

MENU_LOCAL_TASK

MENU_MAX_DEPTH

MENU_MAX_PARTS

MENU_NORMAL_ITEM

MENU_SUGGESTED_ITEM

MENU_CALLBACK

MENU_DEFAULT_LOCAL_TASK

MENU_LOCAL_TASK

MENU_MAX_DEPTH

MENU_MAX_PARTS

MENU_NORMAL_ITEM

MENU_SUGGESTED_ITEM

Scream API

The Dreaded Hooks of Torture

H o r r i b l e T r u t h 7

Hooks of Torture

• to implement a hook, create a function that 'extends' hooks into an existing hook (“hook function”)

• not functions but can be overloaded

• call user function array used to make dynamic function calls

module_invoke_all

<?phpfunction module_invoke_all() { $args = func_get_args(); $hook = $args[0]; unset($args[0]); $return = array(); foreach (module_implements($hook) as $module) { $function = $module .'_'. $hook; $result = call_user_func_array($function, $args); if (isset($result) && is_array($result)) { $return = array_merge_recursive($return, $result); } else if (isset($result)) { $return[] = $result; } }

return $return;}?>

hook_admin

/** * channels_admin * implements hook_admin * Provides channels admin form to save settings for the following fields: * */function channels_admin() { $form['channels'] = array( '#type' => 'textfield', '#title' => t('Channel'), '#default_value' => variable_get('channels', ''), '#size' => 25, '#maxlength' => 128, '#description' => t("channel_theme"), '#required' => TRUE, ); return system_settings_form($form);}

hook_perms

/** * Implements hook_perm(). */function channels_perm() { return array( 'access channel content', 'administer channels', );}

hook_menu

/** * Implements hook_menu(). anne/function channels_menu() { $items = array(); $items['admin/settings/channels'] = array( 'title' => 'channel settings', 'description' => 'select channel', 'page callback' => 'drupal_get_form', 'page arguments' => array('channels_admin'), 'access arguments' => array('administer channels'), 'type' => MENU_NORMAL_ITEM, ); return $items;}

hook_block

/** * Implementation of hook_block(). */function channels_block($op = 'list', $delta = 0, $edit = array()) { switch ($op) { case 'list': $blocks[0]['info'] = t('current_channel'); return $blocks; case 'view': $totals = _channels_get_theme(); if (!empty($webstream)) { $content = theme('channels_current_theme', $webstream); } $blocks['subject'] = t('You're What's On!'); $blocks['content'] = $content; return $blocks; }

hook_menu_alter

/** Implementation of hook_menu_alter(). */

function noaccess_menu_alter(&$items) { $items['node']['access arguments'] = array('access node path');

}

/** Implementation of hook_perm(). */

function noaccess_perm() { return array('access node path');}

Hook Soup

Does Drupal have a Learning Curve...

…or a Learning Brick Wall ?

“Community Plumbing”

Drupal is a Pushme - Pullyou

Framework!Product!

What's aNode?

Field API

“Drupal Isn't 'Classy”'?

H o r r i b l e T r u t h 9

“Drupal isn't Object

Oriented?”

H o r r i b l e T r u t h 10

Drupal Design PatternDRUPAL DESIGN PATTERN

Drupal Design PatternREALITY CHECK.

Drupal Anti-Pattern

“Load Everything then

Cherry Pick What You Need.”

Drupal Encourages

Slavery

H o r r i b l e T r u t h 11

Making Drupal “Slave Safe!”

Actions* & Triggers

*(not slave safe)

Database TNG

Performance & Scaling

Sample Metrics from a large Drupal site:

50 million page views per month

6.5 million site visitors per month

150,000 page views per hour

load tests to levels of greater than 500,000 page views per hour

Drupal.org delivers approximately 1M/day/month

Object CachingAPC

Advantages Low latency No need to serialize/unserialize items Scales perfectly with more web servers

Disadvantages No enforced consistency across multiple web servers Cache is not shared; each web server must generate each item

memcached

Advantages Consistent across multiple web servers Cache is shared across all web servers; items only need to be

generated once

Disadvantages High latency Requires serializing/unserializing items Easily shards data across multiple web servers, but is still a big,

shared cache

Cache Headers

* Download and enable devel module: drush dl devel drush enable devel * Run cron: drush cron * Refresh modules and core updates informartion: drush refresh * Take a snapshot of the DB: drush sql dump > mydb.sql * Open a mysql console for running SQL commands into

Drupal DB: drush sql cli * Clear Drupal cache: drush cache clear

drush

drush

drush_makecore = "7.x"

projects[] = "drupal"

projects[] = "acquia_connector"

projects[apachesolr][download][type] = "cvs"

projects[apachesolr][download][module] = "contributions/modules/apachesolr"

projects[apachesolr][download][revision] = "DRUPAL-7--0"

projects[acquia_search][type] = "module"

projects[acquia_search][download][type] = "svn"

projects[acquia_search][download][url] = "https://svn.acquia.com/drupal/branches/1.x-

7.x/modules/acquia/acquia_search/"

libraries[SolrPhpClient][download][type] = "get"

libraries[SolrPhpClient][download][url] =

"http://solr-php-client.googlecode.com/files/SolrPhpClient.r22.2009-11-09.tgz"libraries[SolrPhpClient][destination] = "modules/apachesolr"

touch ~/.logrotate.state ~/.logrotate.config

emacs ~/.logrotate.config

~/backup/dev.sql.gz { rotate 7 daily nocompress nocopytruncate postrotate /usr/bin/drush -r ~/web.root.org/web/ sql dump | gzip > ~/backup/dev.sql.gz

endscript}

/usr/bin/drush -r ~/web.root.org/web/ sql dump | gzip > ~/backup/dev.sql.gz

Automated Backup