- Patch #80951 by killes, yched et al: block caching.

2 files changed, 65 insertions, 4 deletions

diff --git a/modules/system/system.install b/modules/system/system.install
index 56205fdc9..ffa68b16a 100644
--- a/modules/system/system.install
+++ b/modules/system/system.install
@@ -3481,6 +3481,52 @@ function system_update_6026() {
 }
 
 /**
+ * Add block cache.
+ */
+function system_update_6027() {
+  $ret = array();
+
+  // Create the blocks.cache column.
+  db_add_field($ret, 'blocks', 'cache', array('type' => 'int', 'not null' => TRUE, 'default' => 0, 'size' => 'tiny'));
+
+  // Create the cache_block table.
+  $schema['cache_block'] = array(
+    'fields' => array(
+      'cid'        => array('type' => 'varchar', 'length' => 255, 'not null' => TRUE, 'default' => ''),
+      'data'       => array('type' => 'blob', 'not null' => FALSE, 'size' => 'big'),
+      'expire'     => array('type' => 'int', 'not null' => TRUE, 'default' => 0),
+      'created'    => array('type' => 'int', 'not null' => TRUE, 'default' => 0),
+      'headers'    => array('type' => 'text', 'not null' => FALSE),
+      'serialized' => array('type' => 'int', 'size' => 'small', 'not null' => TRUE, 'default' => 0)
+    ),
+    'indexes' => array('expire' => array('expire')),
+    'primary key' => array('cid'),
+  );
+  db_create_table($ret, 'cache_block', $schema['cache_block']);
+
+  // Fill in the values for the new 'cache' column,
+  // by refreshing the {blocks} table.
+  global $theme, $custom_theme;
+  $old_theme = $theme;
+  $themes = list_themes();
+
+  $result = db_query("SELECT DISTINCT theme FROM {blocks}");
+  while ($row = db_fetch_array($result)) {
+    if (array_key_exists($row['theme'], $themes)) {
+      // Set up global values so that _blocks_rehash()
+      // operates on the expected theme.
+      $theme = NULL;
+      $custom_theme = $row['theme'];
+      _block_rehash();
+    }
+  }
+
+  $theme = $old_theme;
+
+  return $ret;
+}
+
+/**
  * @} End of "defgroup updates-5.x-to-6.x"
  * The next series of updates should start at 7000.
  */
diff --git a/modules/system/system.module b/modules/system/system.module
index 9fc049644..e0152b5f1 100644
--- a/modules/system/system.module
+++ b/modules/system/system.module
@@ -683,7 +683,7 @@ function system_performance_settings() {
   $form['page_cache'] = array(
     '#type' => 'fieldset',
     '#title' => t('Page cache'),
-    '#description' => t('Enabling the cache will offer a significant performance boost. Drupal can store and send compressed cached pages requested by <em>anonymous</em> users. By caching a web page, Drupal does not have to construct the page each time someone wants to view it.'),
+    '#description' => t('Enabling the page cache will offer a significant performance boost. Drupal can store and send compressed cached pages requested by <em>anonymous</em> users. By caching a web page, Drupal does not have to construct the page each time someone wants to view it.'),
   );
 
   $form['page_cache']['cache'] = array(
@@ -701,7 +701,22 @@ function system_performance_settings() {
     '#title' => t('Minimum cache lifetime'),
     '#default_value' => variable_get('cache_lifetime', 0),
     '#options' => $period,
-    '#description' => t('On high-traffic sites it can become necessary to enforce a minimum cache lifetime. The minimum cache lifetime is the minimum amount of time that will go by before the cache is emptied and recreated. A larger minimum cache lifetime offers better performance, but users will not see new content for a longer period of time.')
+    '#description' => t('On high-traffic sites it can become necessary to enforce a minimum cache lifetime. The minimum cache lifetime is the minimum amount of time that will go by before the cache is emptied and recreated. A larger minimum cache lifetime offers better performance, but users will not see new content for a longer period of time. This setting also affects block caching.')
+  );
+
+  $form['block_cache'] = array(
+    '#type' => 'fieldset',
+    '#title' => t('Block cache'),
+    '#description' => t('Enabling the block cache can offer a performance increase for all users by preventing blocks from being reconstructed on every page load. If page cache is also enabled, this performance increase will mainly affect authenticated users.'),
+  );
+
+  $form['block_cache']['block_cache'] = array(
+    '#type' => 'radios',
+    '#title' => t('Block cache'),
+    '#default_value' => variable_get('block_cache', CACHE_DISABLED),
+    '#options' => array(CACHE_DISABLED => t('Disabled'), CACHE_NORMAL => t('Enabled (recommended)')),
+    '#disabled' => count(module_implements('node_grants')),
+    '#description' => t('Note that block caching is inactive when modules defining content access restrictions are enabled.'),
   );
 
   $form['bandwidth_optimizations'] = array(
@@ -1275,8 +1290,8 @@ function system_initialize_theme_blocks($theme) {
       if (!array_key_exists($block['region'], $regions)) {
         $block['region'] = system_default_region($theme);
       }
-      db_query("INSERT INTO {blocks} (module, delta, theme, status, weight, region, visibility, pages, custom, throttle) VALUES ('%s', '%s', '%s', %d, %d, '%s', %d, '%s', %d, %d)",
-          $block['module'], $block['delta'], $theme, $block['status'], $block['weight'], $block['region'], $block['visibility'], $block['pages'], $block['custom'], $block['throttle']);
+      db_query("INSERT INTO {blocks} (module, delta, theme, status, weight, region, visibility, pages, custom, throttle, cache) VALUES ('%s', '%s', '%s', %d, %d, '%s', %d, '%s', %d, %d, %d)",
+          $block['module'], $block['delta'], $theme, $block['status'], $block['weight'], $block['region'], $block['visibility'], $block['pages'], $block['custom'], $block['throttle'], $block['cache']);
     }
   }
 }