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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\Handler\FingersCrossed\ErrorLevelActivationStrategy;
use Monolog\Handler\FingersCrossed\ActivationStrategyInterface;
use Monolog\Logger;
use Monolog\ResettableInterface;
use Monolog\Formatter\FormatterInterface;
use Psr\Log\LogLevel;
/**
* Buffers all records until a certain level is reached
*
* The advantage of this approach is that you don't get any clutter in your log files.
* Only requests which actually trigger an error (or whatever your actionLevel is) will be
* in the logs, but they will contain all records, not only those above the level threshold.
*
* You can then have a passthruLevel as well which means that at the end of the request,
* even if it did not get activated, it will still send through log records of e.g. at least a
* warning level.
*
* You can find the various activation strategies in the
* Monolog\Handler\FingersCrossed\ namespace.
*
* @author Jordi Boggiano <j.boggiano@seld.be>
*
* @phpstan-import-type Record from \Monolog\Logger
* @phpstan-import-type Level from \Monolog\Logger
* @phpstan-import-type LevelName from \Monolog\Logger
*/
class FingersCrossedHandler extends Handler implements ProcessableHandlerInterface, ResettableInterface, FormattableHandlerInterface
{
use ProcessableHandlerTrait;
/**
* @var callable|HandlerInterface
* @phpstan-var callable(?Record, HandlerInterface): HandlerInterface|HandlerInterface
*/
protected $handler;
/** @var ActivationStrategyInterface */
protected $activationStrategy;
/** @var bool */
protected $buffering = true;
/** @var int */
protected $bufferSize;
/** @var Record[] */
protected $buffer = [];
/** @var bool */
protected $stopBuffering;
/**
* @var ?int
* @phpstan-var ?Level
*/
protected $passthruLevel;
/** @var bool */
protected $bubble;
/**
* @psalm-param HandlerInterface|callable(?Record, HandlerInterface): HandlerInterface $handler
*
* @param callable|HandlerInterface $handler Handler or factory callable($record|null, $fingersCrossedHandler).
* @param int|string|ActivationStrategyInterface $activationStrategy Strategy which determines when this handler takes action, or a level name/value at which the handler is activated
* @param int $bufferSize How many entries should be buffered at most, beyond that the oldest items are removed from the buffer.
* @param bool $bubble Whether the messages that are handled can bubble up the stack or not
* @param bool $stopBuffering Whether the handler should stop buffering after being triggered (default true)
* @param int|string $passthruLevel Minimum level to always flush to handler on close, even if strategy not triggered
*
* @phpstan-param Level|LevelName|LogLevel::* $passthruLevel
* @phpstan-param Level|LevelName|LogLevel::*|ActivationStrategyInterface $activationStrategy
*/
public function __construct($handler, $activationStrategy = null, int $bufferSize = 0, bool $bubble = true, bool $stopBuffering = true, $passthruLevel = null)
{
if (null === $activationStrategy) {
$activationStrategy = new ErrorLevelActivationStrategy(Logger::WARNING);
}
// convert simple int activationStrategy to an object
if (!$activationStrategy instanceof ActivationStrategyInterface) {
$activationStrategy = new ErrorLevelActivationStrategy($activationStrategy);
}
$this->handler = $handler;
$this->activationStrategy = $activationStrategy;
$this->bufferSize = $bufferSize;
$this->bubble = $bubble;
$this->stopBuffering = $stopBuffering;
if ($passthruLevel !== null) {
$this->passthruLevel = Logger::toMonologLevel($passthruLevel);
}
if (!$this->handler instanceof HandlerInterface && !is_callable($this->handler)) {
throw new \RuntimeException("The given handler (".json_encode($this->handler).") is not a callable nor a Monolog\Handler\HandlerInterface object");
}
}
/**
* {@inheritDoc}
*/
public function isHandling(array $record): bool
{
return true;
}
/**
* Manually activate this logger regardless of the activation strategy
*/
public function activate(): void
{
if ($this->stopBuffering) {
$this->buffering = false;
}
$this->getHandler(end($this->buffer) ?: null)->handleBatch($this->buffer);
$this->buffer = [];
}
/**
* {@inheritDoc}
*/
public function handle(array $record): bool
{
if ($this->processors) {
/** @var Record $record */
$record = $this->processRecord($record);
}
if ($this->buffering) {
$this->buffer[] = $record;
if ($this->bufferSize > 0 && count($this->buffer) > $this->bufferSize) {
array_shift($this->buffer);
}
if ($this->activationStrategy->isHandlerActivated($record)) {
$this->activate();
}
} else {
$this->getHandler($record)->handle($record);
}
return false === $this->bubble;
}
/**
* {@inheritDoc}
*/
public function close(): void
{
$this->flushBuffer();
$this->getHandler()->close();
}
public function reset()
{
$this->flushBuffer();
$this->resetProcessors();
if ($this->getHandler() instanceof ResettableInterface) {
$this->getHandler()->reset();
}
}
/**
* Clears the buffer without flushing any messages down to the wrapped handler.
*
* It also resets the handler to its initial buffering state.
*/
public function clear(): void
{
$this->buffer = [];
$this->reset();
}
/**
* Resets the state of the handler. Stops forwarding records to the wrapped handler.
*/
private function flushBuffer(): void
{
if (null !== $this->passthruLevel) {
$level = $this->passthruLevel;
$this->buffer = array_filter($this->buffer, function ($record) use ($level) {
return $record['level'] >= $level;
});
if (count($this->buffer) > 0) {
$this->getHandler(end($this->buffer))->handleBatch($this->buffer);
}
}
$this->buffer = [];
$this->buffering = true;
}
/**
* Return the nested handler
*
* If the handler was provided as a factory callable, this will trigger the handler's instantiation.
*
* @return HandlerInterface
*
* @phpstan-param Record $record
*/
public function getHandler(array $record = null)
{
if (!$this->handler instanceof HandlerInterface) {
$this->handler = ($this->handler)($record, $this);
if (!$this->handler instanceof HandlerInterface) {
throw new \RuntimeException("The factory callable should return a HandlerInterface");
}
}
return $this->handler;
}
/**
* {@inheritDoc}
*/
public function setFormatter(FormatterInterface $formatter): HandlerInterface
{
$handler = $this->getHandler();
if ($handler instanceof FormattableHandlerInterface) {
$handler->setFormatter($formatter);
return $this;
}
throw new \UnexpectedValueException('The nested handler of type '.get_class($handler).' does not support formatters.');
}
/**
* {@inheritDoc}
*/
public function getFormatter(): FormatterInterface
{
$handler = $this->getHandler();
if ($handler instanceof FormattableHandlerInterface) {
return $handler->getFormatter();
}
throw new \UnexpectedValueException('The nested handler of type '.get_class($handler).' does not support formatters.');
}
}