ApcEngine (class)
Class ApcEngine
APC storage engine for cache
- Cake\Cache\CacheEngine uses Cake\Core\InstanceConfigTrait
-
Cake\Cache\Engine\ApcEngine
Properties summary
-
$_compiledGroupNames
protectedstring[]
Contains the compiled group names (prefixed with the global configuration prefix)
Inherited Properties
Method Summary
- add() public
Write data for key into cache if it doesn't exist already. If it already exists, it fails and returns false.
- clear() publicDelete all keys from the cache. This will clear every cache config using APC.
- clearGroup() public
Increments the group value to simulate deletion of all keys under a group old values will remain in storage until they expire.
- decrement() publicDecrements the value of an integer cached key
- delete() publicDelete a key from the cache
- groups() public
Returns the
group value
for each of the configured groups If the group initial value was not found, then it initializes the group accordingly. - increment() publicIncrements the value of an integer cached key
- init() publicInitialize the Cache Engine
- read() publicRead a key from the cache
- write() publicWrite data for key into cache
Method Detail
add()source public
add( string $key , mixed $value )
Write data for key into cache if it doesn't exist already. If it already exists, it fails and returns false.
Parameters
- string
$key
- Identifier for the data.
- mixed
$value
- Data to be cached.
Returns
booleanTrue if the data was successfully cached, false on failure.
Link
http://php.net/manual/en/function.apc-add.phpOverrides
Cake\Cache\CacheEngine::add()
clear()source public
clear( boolean $check )
Delete all keys from the cache. This will clear every cache config using APC.
Parameters
- boolean
$check
If true, nothing will be cleared, as entries are removed from APC as they expired. This flag is really only used by FileEngine.
Returns
booleanTrue Returns true.
clearGroup()source public
clearGroup( string $group )
Increments the group value to simulate deletion of all keys under a group old values will remain in storage until they expire.
Parameters
- string
$group
- The group to clear.
Returns
booleansuccess
Overrides
Cake\Cache\CacheEngine::clearGroup()
decrement()source public
decrement( string $key , integer $offset 1 )
Decrements the value of an integer cached key
Parameters
- string
$key
- Identifier for the data
- integer
$offset
optional 1 - How much to subtract
Returns
boolean|integerNew decremented value, false otherwise
delete()source public
delete( string $key )
Delete a key from the cache
Parameters
- string
$key
- Identifier for the data
Returns
booleanTrue if the value was successfully deleted, false if it didn't exist or couldn't be removed
groups()source public
groups( )
Returns the group value
for each of the configured groups If the group initial value was not found, then it initializes the group accordingly.
Returns
arrayOverrides
Cake\Cache\CacheEngine::groups()
increment()source public
increment( string $key , integer $offset 1 )
Increments the value of an integer cached key
Parameters
- string
$key
- Identifier for the data
- integer
$offset
optional 1 - How much to increment
Returns
boolean|integerNew incremented value, false otherwise
init()source public
init( array $config [] )
Initialize the Cache Engine
Called automatically by the cache frontend
Parameters
- array
$config
optional [] - array of setting for the engine
Returns
booleanTrue if the engine has been successfully initialized, false if not
Overrides
Cake\Cache\CacheEngine::init()
read()source public
read( string $key )
Read a key from the cache
Parameters
- string
$key
- Identifier for the data
Returns
mixedThe cached data, or false if the data doesn't exist, has expired, or if there was an error fetching it
write()source public
write( string $key , mixed $value )
Write data for key into cache
Parameters
- string
$key
- Identifier for the data
- mixed
$value
- Data to be cached
Returns
booleanTrue if the data was successfully cached, false on failure
Methods inherited from Cake\Cache\CacheEngine
_key()source protected
_key( string $key )
Generates a safe key, taking account of the configured key prefix
Parameters
- string
$key
- the key passed over
Returns
mixedstring $key or false
Throws
InvalidArgumentExceptionIf key's value is empty
deleteMany()source public
deleteMany( array $keys )
Deletes keys from the cache
Parameters
- array
$keys
- An array of identifiers for the data
Returns
arrayFor each provided cache key (given back as the array key) true if the value was successfully deleted, false if it didn't exist or couldn't be removed
gc()source public
gc( integer|null $expires null )
Garbage collection
Permanently remove all expired and deleted data
Parameters
- integer|null
$expires
optional null - [optional] An expires timestamp, invalidating all data before.
key()source public
key( string $key )
Generates a safe key for use with cache engine storage engines.
Parameters
- string
$key
- the key passed over
Returns
boolean|stringstring key or false
readMany()source public
readMany( array $keys )
Read multiple keys from the cache
Parameters
- array
$keys
- An array of identifiers for the data
Returns
arrayFor each cache key (given as the array key) the cache data associated or false if the data doesn't exist, has expired, or if there was an error fetching it
writeMany()source public
writeMany( array $data )
Write data for many keys into cache
Parameters
- array
$data
- An array of data to be stored in the cache
Returns
arrayof bools for each key provided, true if the data was successfully cached, false on failure
Methods used from Cake\Core\InstanceConfigTrait
_configDelete()source protected
_configDelete( string $key )
Deletes a single config key.
Parameters
- string
$key
- Key to delete.
Throws
Cake\Core\Exception\Exception
if attempting to clobber existing config
_configRead()source protected
_configRead( string|null $key )
Reads a config key.
Parameters
- string|null
$key
- Key to read.
Returns
mixed_configWrite()source protected
_configWrite( string|array $key , mixed $value , boolean|string $merge false )
Writes a config key.
Parameters
- string|array
$key
- Key to write to.
- mixed
$value
- Value to write.
- boolean|string
$merge
optional false True to merge recursively, 'shallow' for simple merge, false to overwrite, defaults to false.
Throws
Cake\Core\Exception\Exception
if attempting to clobber existing config
config()source public
config( string|array|null $key null , mixed|null $value null , boolean $merge true )
Gets/Sets the config.
Usage
Reading the whole config:
$this->config();
Reading a specific value:
$this->config('key');
Reading a nested value:
$this->config('some.nested.key');
Setting a specific value:
$this->config('key', $value);
Setting a nested value:
$this->config('some.nested.key', $value);
Updating multiple config settings at the same time:
$this->config(['one' => 'value', 'another' => 'value']);
Deprecated
3.4.0 use setConfig()/getConfig() instead.Parameters
- string|array|null
$key
optional null - The key to get/set, or a complete array of configs.
- mixed|null
$value
optional null - The value to set.
- boolean
$merge
optional true - Whether to recursively merge or overwrite existing config, defaults to true.
Returns
mixedConfig value being read, or the object itself on write operations.
Throws
Cake\Core\Exception\Exception
When trying to set a key that is invalid.
configShallow()source public
configShallow( string|array $key , mixed|null $value null )
Merge provided config with existing config. Unlike config()
which does a recursive merge for nested keys, this method does a simple merge.
Setting a specific value:
$this->config('key', $value);
Setting a nested value:
$this->config('some.nested.key', $value);
Updating multiple config settings at the same time:
$this->config(['one' => 'value', 'another' => 'value']);
Parameters
- string|array
$key
- The key to set, or a complete array of configs.
- mixed|null
$value
optional null - The value to set.
Returns
$this
getConfig()source public
getConfig( string|null $key null )
Returns the config.
Usage
Reading the whole config:
$this->getConfig();
Reading a specific value:
$this->getConfig('key');
Reading a nested value:
$this->getConfig('some.nested.key');
Parameters
- string|null
$key
optional null - The key to get or null for the whole config.
Returns
mixedConfig value being read.
setConfig()source public
setConfig( string|array $key , mixed|null $value null , boolean $merge true )
Sets the config.
Usage
Setting a specific value:
$this->setConfig('key', $value);
Setting a nested value:
$this->setConfig('some.nested.key', $value);
Updating multiple config settings at the same time:
$this->setConfig(['one' => 'value', 'another' => 'value']);
Parameters
- string|array
$key
- The key to set, or a complete array of configs.
- mixed|null
$value
optional null - The value to set.
- boolean
$merge
optional true - Whether to recursively merge or overwrite existing config, defaults to true.
Returns
$this
Throws
Cake\Core\Exception\Exception
When trying to set a key that is invalid.
Properties detail
$_compiledGroupNamessource
protected string[]
Contains the compiled group names (prefixed with the global configuration prefix)
[]
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https://api.cakephp.org/3.4/class-Cake.Cache.Engine.ApcEngine.html