function SystemMessagesBlock::getCacheMaxAge

Overrides ContextAwarePluginTrait::getCacheMaxAge

File

core/modules/system/src/Plugin/Block/SystemMessagesBlock.php, line 44

Class

SystemMessagesBlock

Provides a block to display the messages.

Namespace

Code

public function getCacheMaxAge() {
    // The messages are session-specific and hence aren't cacheable, but the
    // block itself *is* cacheable because it uses a #lazy_builder callback and
    // hence the block has a globally cacheable render array.
    return Cache::PERMANENT;
}