README

This library aims to help the developer with both a PSR-3 compliant and a custom (extended) logger to send data to Graylog 2 via the Graylog Extended Log Format.

Class information

GiacomoFurlan\Graylog\GELFLogger

It implements the Psr\Log\LoggerInterface interface, so use it as a standard logger.

It can set the short message, the context and the log level.

GiacomoFurlan\Graylog\ExtendedGELFLogger

It extends the previous class, but add gelf* functions to send more complex information.

It also allows the logs to be enqueued, rather than being sent immediately.

• gelfLog
• gelfAlert
• gelfCritical
• gelfDebug
• gelfEmergency
• gelfError
• gelfInfo
• gelfNotice
• gelfWarning
• flush

These function accept a GELF object and the possibility to flush the messages instantly (default true).

The flush function flushes eventual messages previously enqueued.

GiacomoFurlan\Graylog\GELF

A data-transfer object used by ExtendedGELFLogger. It allows to set the short and full messages, to overwrite the host information and to add variables to the context.

GiacomoFurlan\Graylog\UDPWriter

UDP implementation of the WriterInterface used to instantiate the loggers.

If there are enqueued messages (writing with flush set to false, changeable using the extended logger), it will try to run flush when destroyed.

GiacomoFurlan\Graylog\TCPWriter

UDP implementation of the WriterInterface used to instantiate the loggers.

If there are enqueued messages (writing with flush set to false, changeable using the extended logger), it will try to run flush when destroyed.

GiacomoFurlan\Graylog\GELFException

It can be thrown trying to send the information.

• Code GELFException::CODE_MISSING_HOST: the host is's not set or empty
• Code GELFException::CODE_CANT_SEND_MESSAGE: an error occurred trying to send the packet

More information may be gathered reading the exception's message.

Usage example

use GiacomoFurlan\Graylog\ExtendedGELFLogger;
use GiacomoFurlan\Graylog\GELF;
use GiacomoFurlan\Graylog\GELFException;
use GiacomoFurlan\Graylog\GELFLogger;
use GiacomoFurlan\Graylog\UDPWriter;
use Psr\Log\LogLevel;

// ...

$address = 'ip.or.dns.of.graylog.server';
$port = 12201; // or whatever port is configured in Graylog 2
$hostId = 'MyHost'; // host identifier

// Instantiate the writer
$writer = new UDPWriter($address, $port);
// Instantiate the logger (use one or the other... or both)
$simpleLogger = new GELFLogger($writer, $hostId);
$extendedLogger = new ExtendedGELFLogger($writer, $hostId);

// ...

// GELFLogger usage example
try {
  // ...
} catch (\Throwable $exception) {
    $simpleLogger->log(LogLevel::ERROR, $exception->getMessage(), ['code' => $exception->getCode()]);
    // or
    $simpleLogger->error($exception->getMessage(), ['code' => $exception->getCode()]);
}

// ExtendedGELFLogger usage example
try {
    // ...
} catch (\Throwable $exception) {
    $message = new GELF($exception->getMessage(), ['code' => $exception->getCode()]);
    
    $message->setHost('Overwritten host');
    $message->setFullMessage($exception->getTraceAsString());
    $message->setContextEntryset('fileName', $exception->getFile());
    $message->setContextEntryset('fileLine', $exception->getLine());
    
    $extendedLogger->gelfError($message);
}