public function CalculatedCacheContextInterface::getCacheableMetadata in Zircon Profile 8

Same name and namespace in other branches

1. 8.0 core/lib/Drupal/Core/Cache/Context/CalculatedCacheContextInterface.php \Drupal\Core\Cache\Context\CalculatedCacheContextInterface::getCacheableMetadata()

Gets the cacheability metadata for the context based on the parameter value.

There are three valid cases for the returned CacheableMetadata object:

• An empty object means this can be optimized away safely.
• A max-age of 0 means that this context can never be optimized away. It will never bubble up and cache tags will not be used.
• Any non-zero max-age and cache tags will bubble up into the cache item if this is optimized away to allow for invalidation if the context value changes.

Parameters

string|null $parameter: The parameter, or NULL to indicate all possible parameter values.

Return value

\Drupal\Core\Cache\CacheableMetadata A cacheable metadata object.

Throws

\LogicException Thrown if the passed in parameter is invalid.

9 methods override CalculatedCacheContextInterface::getCacheableMetadata()

BazCacheContext::getCacheableMetadata in core/tests/Drupal/Tests/Core/Cache/Context/CacheContextsManagerTest.php

Gets the cacheability metadata for the context based on the parameter value.

CookiesCacheContext::getCacheableMetadata in core/lib/Drupal/Core/Cache/Context/CookiesCacheContext.php

Gets the cacheability metadata for the context based on the parameter value.

HeadersCacheContext::getCacheableMetadata in core/lib/Drupal/Core/Cache/Context/HeadersCacheContext.php

Gets the cacheability metadata for the context based on the parameter value.

LanguagesCacheContext::getCacheableMetadata in core/lib/Drupal/Core/Cache/Context/LanguagesCacheContext.php

Gets the cacheability metadata for the context based on the parameter value.

MenuActiveTrailsCacheContext::getCacheableMetadata in core/lib/Drupal/Core/Cache/Context/MenuActiveTrailsCacheContext.php

Gets the cacheability metadata for the context based on the parameter value.

... See full list

File

core/lib/Drupal/Core/Cache/Context/CalculatedCacheContextInterface.php, line 63

Contains \Drupal\Core\Cache\Context\CalculatedCacheContextInterface.

Class

CalculatedCacheContextInterface

Provides an interface for defining a calculated cache context service.

Namespace

Drupal\Core\Cache\Context

Code

public function getCacheableMetadata($parameter = NULL);