Class ArrayEngine
Array storage engine for cache.
Not actually a persistent cache engine. All data is only stored in memory for the duration of a single process. While not useful in production settings this engine can be useful in tests or console tools where you don't want the overhead of interacting with a cache servers, but want the work saving properties a cache provides.
- Cake\Cache\CacheEngine uses Cake\Core\InstanceConfigTrait
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Cake\Cache\Engine\ArrayEngine
Properties summary
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$dataprotectedarrayCached data.
Inherited Properties
Method Summary
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clear() public
Delete 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.
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decrement() public
Decrements the value of an integer cached key -
delete() public
Delete a key from the cache -
groups() public
Returns the
group valuefor each of the configured groups If the group initial value was not found, then it initializes the group accordingly. -
increment() public
Increments the value of an integer cached key -
read() public
Read a key from the cache -
write() public
Write data for key into cache
Method Detail
clear() public ¶
clear( boolean $check )
Delete all keys from the cache. This will clear every cache config using APC.
Parameters
- boolean $check
- Unused argument required by interface.
Returns
True Returns true.
clearGroup() 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
success
Overrides
decrement() 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
New decremented value, false otherwise
delete() public ¶
delete( string $key )
Delete a key from the cache
Parameters
- string $key
- Identifier for the data
Returns
True if the value was successfully deleted, false if it didn't exist or couldn't be removed
groups() 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
Overrides
increment() 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
New incremented value, false otherwise
Methods inherited from Cake\Cache\CacheEngine
_key() protected ¶
_key( string $key )
Generates a safe key, taking account of the configured key prefix
Parameters
- string $key
- the key passed over
Returns
Key
Throws
If key's value is empty
add() public ¶
add( string $key , mixed $value )
Add a key to the cache if it does not already exist.
Defaults to a non-atomic implementation. Subclasses should prefer atomic implementations.
Parameters
- string $key
- Identifier for the data.
- mixed $value
- Data to be cached.
Returns
True if the data was successfully cached, false on failure.
deleteMany() public ¶
deleteMany( array $keys )
Deletes keys from the cache
Parameters
- array $keys
- An array of identifiers for the data
Returns
For 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() 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.
init() public ¶
init( array $config = [] )
Initialize the cache engine
Called automatically by the cache frontend. Merge the runtime config with the defaults before use.
Parameters
- array $config optional []
- Associative array of parameters for the engine
Returns
True if the engine has been successfully initialized, false if not
key() public ¶
key( string $key )
Generates a safe key for use with cache engine storage engines.
Parameters
- string $key
- the key passed over
Returns
string key or false
readMany() public ¶
readMany( array $keys )
Read multiple keys from the cache
Parameters
- array $keys
- An array of identifiers for the data
Returns
For 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
warning() protected ¶
warning( string $message )
Cache Engines may trigger warnings if they encounter failures during operation, if option warnOnWriteFailures is set to true.
Parameters
- string $message
- The warning message.
writeMany() 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
of bools for each key provided, true if the data was successfully cached, false on failure
Methods used from Cake\Core\InstanceConfigTrait
_configDelete() protected ¶
_configDelete( string $key )
Deletes a single config key.
Parameters
- string $key
- Key to delete.
Throws
_configRead() protected ¶
_configRead( string|null $key )
Reads a config key.
Parameters
- string|null $key
- Key to read.
Returns
_configWrite() 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
config() public deprecated ¶
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
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
Config value being read, or the object itself on write operations.
Throws
configShallow() 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->configShallow('key', $value);
Setting a nested value:
$this->configShallow('some.nested.key', $value);
Updating multiple config settings at the same time:
$this->configShallow(['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() public ¶
getConfig( string|null $key = null , mixed $default = 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');
Reading with default value:
$this->getConfig('some-key', 'default-value');
Parameters
- string|null $key optional null
- The key to get or null for the whole config.
- mixed $default optional null
- The return value when the key does not exist.
Returns
Configuration data at the named key or null if the key does not exist.
setConfig() 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