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See Release Notes
Long Term Support Release
- Bug fixes for general core bugs in 3.9.x will end* 10 May 2021 (12 months).
- Bug fixes for security issues in 3.9.x will end* 8 May 2023 (36 months).
- PHP version: minimum PHP 7.2.0 Note: minimum PHP version has increased since Moodle 3.8. PHP 7.3.x and 7.4.x are supported too.
/cache/stores/memcached/ -> lib.php (source)
The library file for the memcached cache store. This file is part of the memcached cache store, it contains the API for interacting with an instance of the store.
| Copyright: | 2012 Sam Hemelryk |
| License: | http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later |
| File Size: | 853 lines (30 kb) |
| Included or required: | 0 times |
| Referenced: | 1 time |
| Includes or requires: | 0 files |
Defines 1 class
cachestore_memcached:: (29 methods):
__construct()
is_connection_ready()
initialise()
is_initialised()
is_ready()
are_requirements_met()
is_supported_mode()
get_supported_features()
supports_multiple_identifiers()
get_supported_modes()
get()
get_many()
set()
set_many()
delete()
delete_many()
delete_many_connection()
purge()
get_prefixed_keys()
config_get_serialiser_options()
config_get_hash_options()
config_get_configuration_array()
config_set_edit_form_data()
instance_deleted()
initialise_test_instance()
unit_test_configuration()
my_name()
get_warnings()
ready_to_be_used_for_testing()
Class: cachestore_memcached - X-Ref
The memcached store.(Not to be confused with the memcache store)
Configuration options:
servers: string: host:port:weight , ...
compression: true, false
serialiser: SERIALIZER_PHP, SERIALIZER_JSON, SERIALIZER_IGBINARY
prefix: string: defaults to instance name
hashmethod: HASH_DEFAULT, HASH_MD5, HASH_CRC, HASH_FNV1_64, HASH_FNV1A_64, HASH_FNV1_32,
HASH_FNV1A_32, HASH_HSIEH, HASH_MURMUR
bufferwrites: true, false
| __construct($name, array $configuration = array() X-Ref |
| Constructs the store instance. Noting that this function is not an initialisation. It is used to prepare the store for use. The store will be initialised when required and will be provided with a cache_definition at that time. param: string $name param: array $configuration |
| is_connection_ready() X-Ref |
| Confirm whether the connection is ready and usable. return: boolean |
| initialise(cache_definition $definition) X-Ref |
| Initialises the cache. Once this has been done the cache is all set to be used. param: cache_definition $definition |
| is_initialised() X-Ref |
| Returns true once this instance has been initialised. return: bool |
| is_ready() X-Ref |
| Returns true if this store instance is ready to be used. return: bool |
| are_requirements_met() X-Ref |
| Returns true if the store requirements are met. return: bool |
| is_supported_mode($mode) X-Ref |
| Returns true if the given mode is supported by this store. param: int $mode One of cache_store::MODE_* return: bool |
| get_supported_features(array $configuration = array() X-Ref |
| Returns the supported features as a combined int. param: array $configuration return: int |
| supports_multiple_identifiers() X-Ref |
| Returns false as this store does not support multiple identifiers. (This optional function is a performance optimisation; it must be consistent with the value from get_supported_features.) return: bool False |
| get_supported_modes(array $configuration = array() X-Ref |
| Returns the supported modes as a combined int. param: array $configuration return: int |
| get($key) X-Ref |
| Retrieves an item from the cache store given its key. param: string $key The key to retrieve return: mixed The data that was associated with the key, or false if the key did not exist. |
| get_many($keys) X-Ref |
| Retrieves several items from the cache store in a single transaction. If not all of the items are available in the cache then the data value for those that are missing will be set to false. param: array $keys The array of keys to retrieve return: array An array of items from the cache. There will be an item for each key, those that were not in the store will |
| set($key, $data) X-Ref |
| Sets an item in the cache given its key and data value. param: string $key The key to use. param: mixed $data The data to set. return: bool True if the operation was a success false otherwise. |
| set_many(array $keyvaluearray) X-Ref |
| Sets many items in the cache in a single transaction. param: array $keyvaluearray An array of key value pairs. Each item in the array will be an associative array with two return: int The number of items successfully set. It is up to the developer to check this matches the number of items |
| delete($key) X-Ref |
| Deletes an item from the cache store. param: string $key The key to delete. return: bool Returns true if the operation was a success, false otherwise. |
| delete_many(array $keys) X-Ref |
| Deletes several keys from the cache in a single action. param: array $keys The keys to delete return: int The number of items successfully deleted. |
| delete_many_connection(Memcached $connection, array $keys) X-Ref |
| Deletes several keys from the cache in a single action for a specific connection. param: Memcached $connection The connection to work on. param: array $keys The keys to delete return: int The number of items successfully deleted. |
| purge() X-Ref |
| Purges the cache deleting all items within it. return: boolean True on success. False otherwise. |
| get_prefixed_keys(Memcached $connection, $prefix) X-Ref |
| Returns all of the keys in the given connection that belong to this cache store instance. Requires php memcached extension version 2.0.0 or greater. param: Memcached $connection param: string $prefix return: array |
| config_get_serialiser_options() X-Ref |
| Gets an array of options to use as the serialiser. return: array |
| config_get_hash_options() X-Ref |
| Gets an array of hash options available during configuration. return: array |
| config_get_configuration_array($data) X-Ref |
| Given the data from the add instance form this function creates a configuration array. param: stdClass $data return: array |
| config_set_edit_form_data(moodleform $editform, array $config) X-Ref |
| Allows the cache store to set its data against the edit form before it is shown to the user. param: moodleform $editform param: array $config |
| instance_deleted() X-Ref |
| Performs any necessary clean up when the store instance is being deleted. |
| initialise_test_instance(cache_definition $definition) X-Ref |
| Generates an instance of the cache store that can be used for testing. param: cache_definition $definition return: cachestore_memcached|false |
| unit_test_configuration() X-Ref |
| Generates the appropriate configuration required for unit testing. return: array Array of unit test configuration data to be used by initialise(). |
| my_name() X-Ref |
| Returns the name of this instance. return: string |
| get_warnings() X-Ref |
| Used to notify of configuration conflicts. The warnings returned here will be displayed on the cache configuration screen. return: string[] Returns an array of warnings (strings) |
| ready_to_be_used_for_testing() X-Ref |
| Returns true if this cache store instance is both suitable for testing, and ready for testing. Cache stores that support being used as the default store for unit and acceptance testing should override this function and return true if there requirements have been met. return: bool |
