Zend_Memory_Manager Class Reference

Public Member Functions
	__construct ($backend=null)
	__destruct ()
	setMemoryLimit ($newLimit)
	getMemoryLimit ()
	setMinSize ($newSize)
	getMinSize ()
	create ($value='')
	createLocked ($value='')
	unlink (Zend_Memory_Container_Movable $container, $id)
	processUpdate (Zend_Memory_Container_Movable $container, $id)
	load (Zend_Memory_Container_Movable $container, $id)

Detailed Description

Definition at line 44 of file Manager.php.

Constructor & Destructor Documentation

__construct()

__construct

(

$backend = null

)

Memory manager constructor

If backend is not specified, then memory objects are never swapped

Parameters

Zend_Cache_Backend	$backend
array	$backendOptions	associative array of options for the corresponding backend constructor

Definition at line 161 of file Manager.php.

    {
        if ($backend === null) {
            return;
        }

        $this->_backend = $backend;
        $this->_generateMemManagerId();

        $memoryLimitStr = trim(ini_get('memory_limit'));
        if ($memoryLimitStr != ''  &&  $memoryLimitStr != -1) {
            $this->_memoryLimit = (integer)$memoryLimitStr;
            switch (strtolower($memoryLimitStr[strlen($memoryLimitStr)-1])) {
                case 'g':
                    $this->_memoryLimit *= 1024;
                    // Break intentionally omitted
                case 'm':
                    $this->_memoryLimit *= 1024;
                    // Break intentionally omitted
                case 'k':
                    $this->_memoryLimit *= 1024;
                    break;

                default:
                    break;
            }

            $this->_memoryLimit = (int)($this->_memoryLimit*2/3);
        } // No limit otherwise
    }

__destruct()

__destruct

(

)

Object destructor

Clean up backend storage

Definition at line 197 of file Manager.php.

    {
        if ($this->_backend !== null) {
            $this->_backend->clean(Zend_Cache::CLEANING_MODE_MATCHING_TAG, $this->_tags);
        }
    }

Member Function Documentation

create()

create

(

$value = ''

)

Create new Zend_Memory value container

Parameters

string

$value

Returns

Zend_Memory_Container_Interface

Exceptions

Zend_Memory_Exception

Definition at line 254 of file Manager.php.

    {
        return $this->_create($value,  false);
    }

createLocked()

createLocked

(

$value = ''

)

Create new Zend_Memory value container, which has value always locked in memory

Parameters

string

$value

Returns

Zend_Memory_Container_Interface

Exceptions

Zend_Memory_Exception

Definition at line 267 of file Manager.php.

    {
        return $this->_create($value, true);
    }

getMemoryLimit()

getMemoryLimit

(

)

Get memory grow limit

Returns

integer

Definition at line 222 of file Manager.php.

    {
        return $this->_memoryLimit;
    }

getMinSize()

getMinSize

(

)

Get minimum size of values, which may be swapped

Returns

integer

Definition at line 242 of file Manager.php.

    {
        return $this->_minSize;
    }

load()

load	(	Zend_Memory_Container_Movable	$container,
			$id
	)

Load value from swap file.

Definition at line 446 of file Manager.php.

    {
        $value = $this->_backend->load($this->_managerId . $id, true);

        // Try to swap other objects if necessary
        // (do not include specified object into check)
        $this->_memorySize += strlen($value);
        $this->_swapCheck();

        // Add loaded obect to the end of loaded objects list
        $container->setValue($value);

        if ($this->_sizes[$id] > $this->_minSize) {
            // Add object to the end of "unload candidates list"
            $this->_unloadCandidates[$id] = $container;
        }
    }

processUpdate()

processUpdate	(	Zend_Memory_Container_Movable	$container,
			$id
	)

Process value update

This method is automatically invoked by memory container only once per "modification session", but user may call memory container touch() method several times depending on used algorithm. So we have to use this check to optimize this case.

Definition at line 334 of file Manager.php.

    {
        if ($container === $this->_lastModified) {
            return;
        }

        // Remove just updated object from list of candidates to unload
        if( isset($this->_unloadCandidates[$id])) {
            unset($this->_unloadCandidates[$id]);
        }

        // Reduce used memory mark
        $this->_memorySize -= $this->_sizes[$id];

        // Commit changes of previously modified object if necessary
        $this->_commit();

        $this->_lastModified = $container;
    }

setMemoryLimit()

setMemoryLimit

(

$newLimit

)

Set memory grow limit

Parameters

integer

$newLimit

Exceptions

Zend_Exception

Definition at line 210 of file Manager.php.

    {
        $this->_memoryLimit = $newLimit;

        $this->_swapCheck();
    }

setMinSize()

setMinSize

(

$newSize

)

Set minimum size of values, which may be swapped

Parameters

integer

$newSize

Definition at line 232 of file Manager.php.

    {
        $this->_minSize = $newSize;
    }

unlink()

unlink	(	Zend_Memory_Container_Movable	$container,
			$id
	)

Unlink value container from memory manager

Used by Memory container destroy() method

Definition at line 310 of file Manager.php.

    {
        if ($this->_lastModified === $container) {
            // Drop all object modifications
            $this->_lastModified = null;
            unset($this->_sizes[$id]);
            return;
        }

        if (isset($this->_unloadCandidates[$id])) {
            unset($this->_unloadCandidates[$id]);
        }

        $this->_memorySize -= $this->_sizes[$id];
        unset($this->_sizes[$id]);
    }

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The documentation for this class was generated from the following file:

• vendor/magento/zendframework1/library/Zend/Memory/Manager.php