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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;
use Closure;
use DateTimeZone;
use Fiber;
use Monolog\Handler\HandlerInterface;
use Monolog\Processor\ProcessorInterface;
use Psr\Log\LoggerInterface;
use Psr\Log\InvalidArgumentException;
use Psr\Log\LogLevel;
use Throwable;
use Stringable;
use WeakMap;
/**
* Monolog log channel
*
* It contains a stack of Handlers and a stack of Processors,
* and uses them to store records that are added to it.
*
* @author Jordi Boggiano <j.boggiano@seld.be>
* @final
*/
class Logger implements LoggerInterface, ResettableInterface
{
/**
* Detailed debug information
*
* @deprecated Use \Monolog\Level::Debug
*/
public const DEBUG = 100;
/**
* Interesting events
*
* Examples: User logs in, SQL logs.
*
* @deprecated Use \Monolog\Level::Info
*/
public const INFO = 200;
/**
* Uncommon events
*
* @deprecated Use \Monolog\Level::Notice
*/
public const NOTICE = 250;
/**
* Exceptional occurrences that are not errors
*
* Examples: Use of deprecated APIs, poor use of an API,
* undesirable things that are not necessarily wrong.
*
* @deprecated Use \Monolog\Level::Warning
*/
public const WARNING = 300;
/**
* Runtime errors
*
* @deprecated Use \Monolog\Level::Error
*/
public const ERROR = 400;
/**
* Critical conditions
*
* Example: Application component unavailable, unexpected exception.
*
* @deprecated Use \Monolog\Level::Critical
*/
public const CRITICAL = 500;
/**
* Action must be taken immediately
*
* Example: Entire website down, database unavailable, etc.
* This should trigger the SMS alerts and wake you up.
*
* @deprecated Use \Monolog\Level::Alert
*/
public const ALERT = 550;
/**
* Urgent alert.
*
* @deprecated Use \Monolog\Level::Emergency
*/
public const EMERGENCY = 600;
/**
* Monolog API version
*
* This is only bumped when API breaks are done and should
* follow the major version of the library
*/
public const API = 3;
/**
* Mapping between levels numbers defined in RFC 5424 and Monolog ones
*
* @phpstan-var array<int, Level> $rfc_5424_levels
*/
private const RFC_5424_LEVELS = [
7 => Level::Debug,
6 => Level::Info,
5 => Level::Notice,
4 => Level::Warning,
3 => Level::Error,
2 => Level::Critical,
1 => Level::Alert,
0 => Level::Emergency,
];
protected string $name;
/**
* The handler stack
*
* @var list<HandlerInterface>
*/
protected array $handlers;
/**
* Processors that will process all log records
*
* To process records of a single handler instead, add the processor on that specific handler
*
* @var array<(callable(LogRecord): LogRecord)|ProcessorInterface>
*/
protected array $processors;
protected bool $microsecondTimestamps = true;
protected DateTimeZone $timezone;
protected Closure|null $exceptionHandler = null;
/**
* Keeps track of depth to prevent infinite logging loops
*/
private int $logDepth = 0;
/**
* @var WeakMap<Fiber<mixed, mixed, mixed, mixed>, int> Keeps track of depth inside fibers to prevent infinite logging loops
*/
private WeakMap $fiberLogDepth;
/**
* Whether to detect infinite logging loops
* This can be disabled via {@see useLoggingLoopDetection} if you have async handlers that do not play well with this
*/
private bool $detectCycles = true;
/**
* @param string $name The logging channel, a simple descriptive name that is attached to all log records
* @param HandlerInterface[] $handlers Optional stack of handlers, the first one in the array is called first, etc.
* @param callable[] $processors Optional array of processors
* @param DateTimeZone|null $timezone Optional timezone, if not provided date_default_timezone_get() will be used
*
* @phpstan-param array<(callable(LogRecord): LogRecord)|ProcessorInterface> $processors
*/
public function __construct(string $name, array $handlers = [], array $processors = [], DateTimeZone|null $timezone = null)
{
$this->name = $name;
$this->setHandlers($handlers);
$this->processors = $processors;
$this->timezone = $timezone ?? new DateTimeZone(date_default_timezone_get());
$this->fiberLogDepth = new \WeakMap();
}
public function getName(): string
{
return $this->name;
}
/**
* Return a new cloned instance with the name changed
*
* @return static
*/
public function withName(string $name): self
{
$new = clone $this;
$new->name = $name;
return $new;
}
/**
* Pushes a handler on to the stack.
*
* @return $this
*/
public function pushHandler(HandlerInterface $handler): self
{
array_unshift($this->handlers, $handler);
return $this;
}
/**
* Pops a handler from the stack
*
* @throws \LogicException If empty handler stack
*/
public function popHandler(): HandlerInterface
{
if (0 === \count($this->handlers)) {
throw new \LogicException('You tried to pop from an empty handler stack.');
}
return array_shift($this->handlers);
}
/**
* Set handlers, replacing all existing ones.
*
* If a map is passed, keys will be ignored.
*
* @param list<HandlerInterface> $handlers
* @return $this
*/
public function setHandlers(array $handlers): self
{
$this->handlers = [];
foreach (array_reverse($handlers) as $handler) {
$this->pushHandler($handler);
}
return $this;
}
/**
* @return list<HandlerInterface>
*/
public function getHandlers(): array
{
return $this->handlers;
}
/**
* Adds a processor on to the stack.
*
* @phpstan-param ProcessorInterface|(callable(LogRecord): LogRecord) $callback
* @return $this
*/
public function pushProcessor(ProcessorInterface|callable $callback): self
{
array_unshift($this->processors, $callback);
return $this;
}
/**
* Removes the processor on top of the stack and returns it.
*
* @phpstan-return ProcessorInterface|(callable(LogRecord): LogRecord)
* @throws \LogicException If empty processor stack
*/
public function popProcessor(): callable
{
if (0 === \count($this->processors)) {
throw new \LogicException('You tried to pop from an empty processor stack.');
}
return array_shift($this->processors);
}
/**
* @return callable[]
* @phpstan-return array<ProcessorInterface|(callable(LogRecord): LogRecord)>
*/
public function getProcessors(): array
{
return $this->processors;
}
/**
* Control the use of microsecond resolution timestamps in the 'datetime'
* member of new records.
*
* As of PHP7.1 microseconds are always included by the engine, so
* there is no performance penalty and Monolog 2 enabled microseconds
* by default. This function lets you disable them though in case you want
* to suppress microseconds from the output.
*
* @param bool $micro True to use microtime() to create timestamps
* @return $this
*/
public function useMicrosecondTimestamps(bool $micro): self
{
$this->microsecondTimestamps = $micro;
return $this;
}
/**
* @return $this
*/
public function useLoggingLoopDetection(bool $detectCycles): self
{
$this->detectCycles = $detectCycles;
return $this;
}
/**
* Adds a log record.
*
* @param int $level The logging level (a Monolog or RFC 5424 level)
* @param string $message The log message
* @param mixed[] $context The log context
* @param DateTimeImmutable $datetime Optional log date to log into the past or future
* @return bool Whether the record has been processed
*
* @phpstan-param value-of<Level::VALUES>|Level $level
*/
public function addRecord(int|Level $level, string $message, array $context = [], DateTimeImmutable $datetime = null): bool
{
if (is_int($level) && isset(self::RFC_5424_LEVELS[$level])) {
$level = self::RFC_5424_LEVELS[$level];
}
if ($this->detectCycles) {
if (null !== ($fiber = Fiber::getCurrent())) {
$logDepth = $this->fiberLogDepth[$fiber] = ($this->fiberLogDepth[$fiber] ?? 0) + 1;
} else {
$logDepth = ++$this->logDepth;
}
} else {
$logDepth = 0;
}
if ($logDepth === 3) {
$this->warning('A possible infinite logging loop was detected and aborted. It appears some of your handler code is triggering logging, see the previous log record for a hint as to what may be the cause.');
return false;
} elseif ($logDepth >= 5) { // log depth 4 is let through, so we can log the warning above
return false;
}
try {
$recordInitialized = count($this->processors) === 0;
$record = new LogRecord(
datetime: $datetime ?? new DateTimeImmutable($this->microsecondTimestamps, $this->timezone),
channel: $this->name,
level: self::toMonologLevel($level),
message: $message,
context: $context,
extra: [],
);
$handled = false;
foreach ($this->handlers as $handler) {
if (false === $recordInitialized) {
// skip initializing the record as long as no handler is going to handle it
if (!$handler->isHandling($record)) {
continue;
}
try {
foreach ($this->processors as $processor) {
$record = $processor($record);
}
$recordInitialized = true;
} catch (Throwable $e) {
$this->handleException($e, $record);
return true;
}
}
// once the record is initialized, send it to all handlers as long as the bubbling chain is not interrupted
try {
$handled = true;
if (true === $handler->handle(clone $record)) {
break;
}
} catch (Throwable $e) {
$this->handleException($e, $record);
return true;
}
}
return $handled;
} finally {
if ($this->detectCycles) {
if (isset($fiber)) {
$this->fiberLogDepth[$fiber]--;
} else {
$this->logDepth--;
}
}
}
}
/**
* Ends a log cycle and frees all resources used by handlers.
*
* Closing a Handler means flushing all buffers and freeing any open resources/handles.
* Handlers that have been closed should be able to accept log records again and re-open
* themselves on demand, but this may not always be possible depending on implementation.
*
* This is useful at the end of a request and will be called automatically on every handler
* when they get destructed.
*/
public function close(): void
{
foreach ($this->handlers as $handler) {
$handler->close();
}
}
/**
* Ends a log cycle and resets all handlers and processors to their initial state.
*
* Resetting a Handler or a Processor means flushing/cleaning all buffers, resetting internal
* state, and getting it back to a state in which it can receive log records again.
*
* This is useful in case you want to avoid logs leaking between two requests or jobs when you
* have a long running process like a worker or an application server serving multiple requests
* in one process.
*/
public function reset(): void
{
foreach ($this->handlers as $handler) {
if ($handler instanceof ResettableInterface) {
$handler->reset();
}
}
foreach ($this->processors as $processor) {
if ($processor instanceof ResettableInterface) {
$processor->reset();
}
}
}
/**
* Gets the name of the logging level as a string.
*
* This still returns a string instead of a Level for BC, but new code should not rely on this method.
*
* @throws \Psr\Log\InvalidArgumentException If level is not defined
*
* @phpstan-param value-of<Level::VALUES>|Level $level
* @phpstan-return value-of<Level::NAMES>
*
* @deprecated Since 3.0, use {@see toMonologLevel} or {@see \Monolog\Level->getName()} instead
*/
public static function getLevelName(int|Level $level): string
{
return self::toMonologLevel($level)->getName();
}
/**
* Converts PSR-3 levels to Monolog ones if necessary
*
* @param int|string|Level|LogLevel::* $level Level number (monolog) or name (PSR-3)
* @throws \Psr\Log\InvalidArgumentException If level is not defined
*
* @phpstan-param value-of<Level::VALUES>|value-of<Level::NAMES>|Level|LogLevel::* $level
*/
public static function toMonologLevel(string|int|Level $level): Level
{
if ($level instanceof Level) {
return $level;
}
if (\is_string($level)) {
if (\is_numeric($level)) {
$levelEnum = Level::tryFrom((int) $level);
if ($levelEnum === null) {
throw new InvalidArgumentException('Level "'.$level.'" is not defined, use one of: '.implode(', ', Level::NAMES + Level::VALUES));
}
return $levelEnum;
}
// Contains first char of all log levels and avoids using strtoupper() which may have
// strange results depending on locale (for example, "i" will become "İ" in Turkish locale)
$upper = strtr(substr($level, 0, 1), 'dinweca', 'DINWECA') . strtolower(substr($level, 1));
if (defined(Level::class.'::'.$upper)) {
return constant(Level::class . '::' . $upper);
}
throw new InvalidArgumentException('Level "'.$level.'" is not defined, use one of: '.implode(', ', Level::NAMES + Level::VALUES));
}
$levelEnum = Level::tryFrom($level);
if ($levelEnum === null) {
throw new InvalidArgumentException('Level "'.var_export($level, true).'" is not defined, use one of: '.implode(', ', Level::NAMES + Level::VALUES));
}
return $levelEnum;
}
/**
* Checks whether the Logger has a handler that listens on the given level
*
* @phpstan-param value-of<Level::VALUES>|value-of<Level::NAMES>|Level|LogLevel::* $level
*/
public function isHandling(int|string|Level $level): bool
{
$record = new LogRecord(
datetime: new DateTimeImmutable($this->microsecondTimestamps, $this->timezone),
channel: $this->name,
message: '',
level: self::toMonologLevel($level),
);
foreach ($this->handlers as $handler) {
if ($handler->isHandling($record)) {
return true;
}
}
return false;
}
/**
* Set a custom exception handler that will be called if adding a new record fails
*
* The Closure will receive an exception object and the record that failed to be logged
*
* @return $this
*/
public function setExceptionHandler(Closure|null $callback): self
{
$this->exceptionHandler = $callback;
return $this;
}
public function getExceptionHandler(): Closure|null
{
return $this->exceptionHandler;
}
/**
* Adds a log record at an arbitrary level.
*
* This method allows for compatibility with common interfaces.
*
* @param mixed $level The log level (a Monolog, PSR-3 or RFC 5424 level)
* @param string|Stringable $message The log message
* @param mixed[] $context The log context
*
* @phpstan-param Level|LogLevel::* $level
*/
public function log($level, string|\Stringable $message, array $context = []): void
{
if (!$level instanceof Level) {
if (!is_string($level) && !is_int($level)) {
throw new \InvalidArgumentException('$level is expected to be a string, int or '.Level::class.' instance');
}
if (isset(self::RFC_5424_LEVELS[$level])) {
$level = self::RFC_5424_LEVELS[$level];
}
$level = static::toMonologLevel($level);
}
$this->addRecord($level, (string) $message, $context);
}
/**
* Adds a log record at the DEBUG level.
*
* This method allows for compatibility with common interfaces.
*
* @param string|Stringable $message The log message
* @param mixed[] $context The log context
*/
public function debug(string|\Stringable $message, array $context = []): void
{
$this->addRecord(Level::Debug, (string) $message, $context);
}
/**
* Adds a log record at the INFO level.
*
* This method allows for compatibility with common interfaces.
*
* @param string|Stringable $message The log message
* @param mixed[] $context The log context
*/
public function info(string|\Stringable $message, array $context = []): void
{
$this->addRecord(Level::Info, (string) $message, $context);
}
/**
* Adds a log record at the NOTICE level.
*
* This method allows for compatibility with common interfaces.
*
* @param string|Stringable $message The log message
* @param mixed[] $context The log context
*/
public function notice(string|\Stringable $message, array $context = []): void
{
$this->addRecord(Level::Notice, (string) $message, $context);
}
/**
* Adds a log record at the WARNING level.
*
* This method allows for compatibility with common interfaces.
*
* @param string|Stringable $message The log message
* @param mixed[] $context The log context
*/
public function warning(string|\Stringable $message, array $context = []): void
{
$this->addRecord(Level::Warning, (string) $message, $context);
}
/**
* Adds a log record at the ERROR level.
*
* This method allows for compatibility with common interfaces.
*
* @param string|Stringable $message The log message
* @param mixed[] $context The log context
*/
public function error(string|\Stringable $message, array $context = []): void
{
$this->addRecord(Level::Error, (string) $message, $context);
}
/**
* Adds a log record at the CRITICAL level.
*
* This method allows for compatibility with common interfaces.
*
* @param string|Stringable $message The log message
* @param mixed[] $context The log context
*/
public function critical(string|\Stringable $message, array $context = []): void
{
$this->addRecord(Level::Critical, (string) $message, $context);
}
/**
* Adds a log record at the ALERT level.
*
* This method allows for compatibility with common interfaces.
*
* @param string|Stringable $message The log message
* @param mixed[] $context The log context
*/
public function alert(string|\Stringable $message, array $context = []): void
{
$this->addRecord(Level::Alert, (string) $message, $context);
}
/**
* Adds a log record at the EMERGENCY level.
*
* This method allows for compatibility with common interfaces.
*
* @param string|Stringable $message The log message
* @param mixed[] $context The log context
*/
public function emergency(string|\Stringable $message, array $context = []): void
{
$this->addRecord(Level::Emergency, (string) $message, $context);
}
/**
* Sets the timezone to be used for the timestamp of log records.
*
* @return $this
*/
public function setTimezone(DateTimeZone $tz): self
{
$this->timezone = $tz;
return $this;
}
/**
* Returns the timezone to be used for the timestamp of log records.
*/
public function getTimezone(): DateTimeZone
{
return $this->timezone;
}
/**
* Delegates exception management to the custom exception handler,
* or throws the exception if no custom handler is set.
*/
protected function handleException(Throwable $e, LogRecord $record): void
{
if (null === $this->exceptionHandler) {
throw $e;
}
($this->exceptionHandler)($e, $record);
}
/**
* @return array<string, mixed>
*/
public function __serialize(): array
{
return [
'name' => $this->name,
'handlers' => $this->handlers,
'processors' => $this->processors,
'microsecondTimestamps' => $this->microsecondTimestamps,
'timezone' => $this->timezone,
'exceptionHandler' => $this->exceptionHandler,
'logDepth' => $this->logDepth,
'detectCycles' => $this->detectCycles,
];
}
/**
* @param array<string, mixed> $data
*/
public function __unserialize(array $data): void
{
foreach (['name', 'handlers', 'processors', 'microsecondTimestamps', 'timezone', 'exceptionHandler', 'logDepth', 'detectCycles'] as $property) {
if (isset($data[$property])) {
$this->$property = $data[$property];
}
}
$this->fiberLogDepth = new \WeakMap();
}
}
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