256 lines
9.0 KiB
PHP
256 lines
9.0 KiB
PHP
|
<?php
|
||
|
|
/*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
*
|
||
|
|
* This software consists of voluntary contributions made by many individuals
|
||
|
|
* and is licensed under the LGPL. For more information, see
|
||
|
|
* <http://www.doctrine-project.org>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
namespace Doctrine\DBAL\Cache;
|
||
|
|
|
||
|
|
use Doctrine\DBAL\Driver\Statement;
|
||
|
|
use Doctrine\DBAL\Driver\ResultStatement;
|
||
|
|
use Doctrine\DBAL\Connection;
|
||
|
|
use Doctrine\Common\Cache\Cache;
|
||
|
|
use PDO;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Cache statement for SQL results.
|
||
|
|
*
|
||
|
|
* A result is saved in multiple cache keys, there is the originally specified
|
||
|
|
* cache key which is just pointing to result rows by key. The following things
|
||
|
|
* have to be ensured:
|
||
|
|
*
|
||
|
|
* 1. lifetime of the original key has to be longer than that of all the individual rows keys
|
||
|
|
* 2. if any one row key is missing the query has to be re-executed.
|
||
|
|
*
|
||
|
|
* Also you have to realize that the cache will load the whole result into memory at once to ensure 2.
|
||
|
|
* This means that the memory usage for cached results might increase by using this feature.
|
||
|
|
*/
|
||
|
|
class ResultCacheStatement implements \IteratorAggregate, ResultStatement
|
||
|
|
{
|
||
|
|
/**
|
||
|
|
* @var \Doctrine\Common\Cache\Cache
|
||
|
|
*/
|
||
|
|
private $resultCache;
|
||
|
|
|
||
|
|
/**
|
||
|
|
*
|
||
|
|
* @var string
|
||
|
|
*/
|
||
|
|
private $cacheKey;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @var string
|
||
|
|
*/
|
||
|
|
private $realKey;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @var int
|
||
|
|
*/
|
||
|
|
private $lifetime;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @var Doctrine\DBAL\Driver\Statement
|
||
|
|
*/
|
||
|
|
private $statement;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Did we reach the end of the statement?
|
||
|
|
*
|
||
|
|
* @var bool
|
||
|
|
*/
|
||
|
|
private $emptied = false;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @var array
|
||
|
|
*/
|
||
|
|
private $data;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @var int
|
||
|
|
*/
|
||
|
|
private $defaultFetchStyle = PDO::FETCH_BOTH;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @param Statement $stmt
|
||
|
|
* @param Cache $resultCache
|
||
|
|
* @param string $cacheKey
|
||
|
|
* @param string $realKey
|
||
|
|
* @param int $lifetime
|
||
|
|
*/
|
||
|
|
public function __construct(Statement $stmt, Cache $resultCache, $cacheKey, $realKey, $lifetime)
|
||
|
|
{
|
||
|
|
$this->statement = $stmt;
|
||
|
|
$this->resultCache = $resultCache;
|
||
|
|
$this->cacheKey = $cacheKey;
|
||
|
|
$this->realKey = $realKey;
|
||
|
|
$this->lifetime = $lifetime;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Closes the cursor, enabling the statement to be executed again.
|
||
|
|
*
|
||
|
|
* @return boolean Returns TRUE on success or FALSE on failure.
|
||
|
|
*/
|
||
|
|
public function closeCursor()
|
||
|
|
{
|
||
|
|
$this->statement->closeCursor();
|
||
|
|
if ($this->emptied && $this->data !== null) {
|
||
|
|
$data = $this->resultCache->fetch($this->cacheKey);
|
||
|
|
if (!$data) {
|
||
|
|
$data = array();
|
||
|
|
}
|
||
|
|
$data[$this->realKey] = $this->data;
|
||
|
|
|
||
|
|
$this->resultCache->save($this->cacheKey, $data, $this->lifetime);
|
||
|
|
unset($this->data);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* columnCount
|
||
|
|
* Returns the number of columns in the result set
|
||
|
|
*
|
||
|
|
* @return integer Returns the number of columns in the result set represented
|
||
|
|
* by the PDOStatement object. If there is no result set,
|
||
|
|
* this method should return 0.
|
||
|
|
*/
|
||
|
|
public function columnCount()
|
||
|
|
{
|
||
|
|
return $this->statement->columnCount();
|
||
|
|
}
|
||
|
|
|
||
|
|
public function setFetchMode($fetchStyle, $arg2 = null, $arg3 = null)
|
||
|
|
{
|
||
|
|
$this->defaultFetchStyle = $fetchStyle;
|
||
|
|
}
|
||
|
|
|
||
|
|
public function getIterator()
|
||
|
|
{
|
||
|
|
$data = $this->fetchAll($this->defaultFetchStyle);
|
||
|
|
return new \ArrayIterator($data);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* fetch
|
||
|
|
*
|
||
|
|
* @see Query::HYDRATE_* constants
|
||
|
|
* @param integer $fetchStyle Controls how the next row will be returned to the caller.
|
||
|
|
* This value must be one of the Query::HYDRATE_* constants,
|
||
|
|
* defaulting to Query::HYDRATE_BOTH
|
||
|
|
*
|
||
|
|
* @param integer $cursorOrientation For a PDOStatement object representing a scrollable cursor,
|
||
|
|
* this value determines which row will be returned to the caller.
|
||
|
|
* This value must be one of the Query::HYDRATE_ORI_* constants, defaulting to
|
||
|
|
* Query::HYDRATE_ORI_NEXT. To request a scrollable cursor for your
|
||
|
|
* PDOStatement object,
|
||
|
|
* you must set the PDO::ATTR_CURSOR attribute to Doctrine::CURSOR_SCROLL when you
|
||
|
|
* prepare the SQL statement with Doctrine_Adapter_Interface->prepare().
|
||
|
|
*
|
||
|
|
* @param integer $cursorOffset For a PDOStatement object representing a scrollable cursor for which the
|
||
|
|
* $cursorOrientation parameter is set to Query::HYDRATE_ORI_ABS, this value specifies
|
||
|
|
* the absolute number of the row in the result set that shall be fetched.
|
||
|
|
*
|
||
|
|
* For a PDOStatement object representing a scrollable cursor for
|
||
|
|
* which the $cursorOrientation parameter is set to Query::HYDRATE_ORI_REL, this value
|
||
|
|
* specifies the row to fetch relative to the cursor position before
|
||
|
|
* PDOStatement->fetch() was called.
|
||
|
|
*
|
||
|
|
* @return mixed
|
||
|
|
*/
|
||
|
|
public function fetch($fetchStyle = PDO::FETCH_BOTH)
|
||
|
|
{
|
||
|
|
if ($this->data === null) {
|
||
|
|
$this->data = array();
|
||
|
|
}
|
||
|
|
|
||
|
|
$row = $this->statement->fetch(PDO::FETCH_ASSOC);
|
||
|
|
if ($row) {
|
||
|
|
$this->data[] = $row;
|
||
|
|
|
||
|
|
if ($fetchStyle == PDO::FETCH_ASSOC) {
|
||
|
|
return $row;
|
||
|
|
} else if ($fetchStyle == PDO::FETCH_NUM) {
|
||
|
|
return array_values($row);
|
||
|
|
} else if ($fetchStyle == PDO::FETCH_BOTH) {
|
||
|
|
return array_merge($row, array_values($row));
|
||
|
|
} else {
|
||
|
|
throw new \InvalidArgumentException("Invalid fetch-style given for caching result.");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
$this->emptied = true;
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns an array containing all of the result set rows
|
||
|
|
*
|
||
|
|
* @param integer $fetchStyle Controls how the next row will be returned to the caller.
|
||
|
|
* This value must be one of the Query::HYDRATE_* constants,
|
||
|
|
* defaulting to Query::HYDRATE_BOTH
|
||
|
|
*
|
||
|
|
* @param integer $columnIndex Returns the indicated 0-indexed column when the value of $fetchStyle is
|
||
|
|
* Query::HYDRATE_COLUMN. Defaults to 0.
|
||
|
|
*
|
||
|
|
* @return array
|
||
|
|
*/
|
||
|
|
public function fetchAll($fetchStyle = PDO::FETCH_BOTH)
|
||
|
|
{
|
||
|
|
$rows = array();
|
||
|
|
while ($row = $this->fetch($fetchStyle)) {
|
||
|
|
$rows[] = $row;
|
||
|
|
}
|
||
|
|
return $rows;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* fetchColumn
|
||
|
|
* Returns a single column from the next row of a
|
||
|
|
* result set or FALSE if there are no more rows.
|
||
|
|
*
|
||
|
|
* @param integer $columnIndex 0-indexed number of the column you wish to retrieve from the row. If no
|
||
|
|
* value is supplied, PDOStatement->fetchColumn()
|
||
|
|
* fetches the first column.
|
||
|
|
*
|
||
|
|
* @return string returns a single column in the next row of a result set.
|
||
|
|
*/
|
||
|
|
public function fetchColumn($columnIndex = 0)
|
||
|
|
{
|
||
|
|
$row = $this->fetch(PDO::FETCH_NUM);
|
||
|
|
if (!isset($row[$columnIndex])) {
|
||
|
|
// TODO: verify this is correct behavior
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
return $row[$columnIndex];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* rowCount
|
||
|
|
* rowCount() returns the number of rows affected by the last DELETE, INSERT, or UPDATE statement
|
||
|
|
* executed by the corresponding object.
|
||
|
|
*
|
||
|
|
* If the last SQL statement executed by the associated Statement object was a SELECT statement,
|
||
|
|
* some databases may return the number of rows returned by that statement. However,
|
||
|
|
* this behaviour is not guaranteed for all databases and should not be
|
||
|
|
* relied on for portable applications.
|
||
|
|
*
|
||
|
|
* @return integer Returns the number of rows.
|
||
|
|
*/
|
||
|
|
public function rowCount()
|
||
|
|
{
|
||
|
|
return $this->statement->rowCount();
|
||
|
|
}
|
||
|
|
}
|