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<?php declare(strict_types=1);
/*
* This file is part of the Monolog package.
*
* (c) Jordi Boggiano <j.boggiano@seld.be>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Monolog\Handler;
use Monolog\Logger;
use Monolog\ResettableInterface;
use Monolog\Formatter\FormatterInterface;
/**
* Buffers all records until closing the handler and then pass them as batch.
*
* This is useful for a MailHandler to send only one mail per request instead of
* sending one per log message.
*
* @author Christophe Coevoet <stof@notk.org>
*
* @phpstan-import-type Record from \Monolog\Logger
*/
class BufferHandler extends AbstractHandler implements ProcessableHandlerInterface, FormattableHandlerInterface
{
use ProcessableHandlerTrait;
/** @var HandlerInterface */
protected $handler;
/** @var int */
protected $bufferSize = 0;
/** @var int */
protected $bufferLimit;
/** @var bool */
protected $flushOnOverflow;
/** @var Record[] */
protected $buffer = [];
/** @var bool */
protected $initialized = false;
/**
* @param HandlerInterface $handler Handler.
* @param int $bufferLimit How many entries should be buffered at most, beyond that the oldest items are removed from the buffer.
* @param bool $flushOnOverflow If true, the buffer is flushed when the max size has been reached, by default oldest entries are discarded
*/
public function __construct(HandlerInterface $handler, int $bufferLimit = 0, $level = Logger::DEBUG, bool $bubble = true, bool $flushOnOverflow = false)
{
parent::__construct($level, $bubble);
$this->handler = $handler;
$this->bufferLimit = $bufferLimit;
$this->flushOnOverflow = $flushOnOverflow;
}
/**
* {@inheritDoc}
*/
public function handle(array $record): bool
{
if ($record['level'] < $this->level) {
return false;
}
if (!$this->initialized) {
// __destructor() doesn't get called on Fatal errors
register_shutdown_function([$this, 'close']);
$this->initialized = true;
}
if ($this->bufferLimit > 0 && $this->bufferSize === $this->bufferLimit) {
if ($this->flushOnOverflow) {
$this->flush();
} else {
array_shift($this->buffer);
$this->bufferSize--;
}
}
if ($this->processors) {
/** @var Record $record */
$record = $this->processRecord($record);
}
$this->buffer[] = $record;
$this->bufferSize++;
return false === $this->bubble;
}
public function flush(): void
{
if ($this->bufferSize === 0) {
return;
}
$this->handler->handleBatch($this->buffer);
$this->clear();
}
public function __destruct()
{
// suppress the parent behavior since we already have register_shutdown_function()
// to call close(), and the reference contained there will prevent this from being
// GC'd until the end of the request
}
/**
* {@inheritDoc}
*/
public function close(): void
{
$this->flush();
$this->handler->close();
}
/**
* Clears the buffer without flushing any messages down to the wrapped handler.
*/
public function clear(): void
{
$this->bufferSize = 0;
$this->buffer = [];
}
public function reset()
{
$this->flush();
parent::reset();
$this->resetProcessors();
if ($this->handler instanceof ResettableInterface) {
$this->handler->reset();
}
}
/**
* {@inheritDoc}
*/
public function setFormatter(FormatterInterface $formatter): HandlerInterface
{
if ($this->handler instanceof FormattableHandlerInterface) {
$this->handler->setFormatter($formatter);
return $this;
}
throw new \UnexpectedValueException('The nested handler of type '.get_class($this->handler).' does not support formatters.');
}
/**
* {@inheritDoc}
*/
public function getFormatter(): FormatterInterface
{
if ($this->handler instanceof FormattableHandlerInterface) {
return $this->handler->getFormatter();
}
throw new \UnexpectedValueException('The nested handler of type '.get_class($this->handler).' does not support formatters.');
}
}
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