README

Symfony bundle which creates a dedicated Monolog log file for each command or message handler.

Features

Dynamically creates a dedicated Monolog file handler for each command or message handler
Uses Monolog's console handler to display the output inside a terminal
Supports using Monolog's stream or rotating file handlers & creating custom handler factories
Automatically excludes the configured Monolog channel from all other handlers with exclusive channels
Allows per command configuration through the use of PHP 8 attributes or Doctrine annotations
Supports configuring which output stream should be used by certain log levels (stdout or stderr)

Requirements

PHP 7.2 or greater
Symfony 4.4 or Symfony 5.2 or greater

Installation

Require the bundle with Composer:

composer require bizkit/loggable-command-bundle

Create the bundle configuration file under config/packages/bizkit_loggable_command.yaml. Here is a reference configuration file:

bizkit_loggable_command:

    # The name of the channel used by the console & file handlers.
    channel_name:         loggable_output

    # Configuration options for the console handler.
    console_handler_options:

        # The minimum level at which the output is sent to stderr instead of stdout.
        stderr_threshold:     ERROR
        bubble:               true
        verbosity_levels:
            VERBOSITY_QUIET:      ERROR
            VERBOSITY_NORMAL:     WARNING
            VERBOSITY_VERBOSE:    NOTICE
            VERBOSITY_VERY_VERBOSE: INFO
            VERBOSITY_DEBUG:      DEBUG
        console_formatter_options:
            format:               "[%%datetime%%] %%start_tag%%%%level_name%%%%end_tag%% %%message%%\n"
        formatter:            null

    # Configuration options for the file handler.
    file_handler_options:

        # The path where the log files are stored.
        # A {filename} & {date} placeholders are available which get resolved to the name of the log & current date.
        # The date format can be configured using the "date_format" option.
        path:                 '%kernel.logs_dir%/console/{filename}.log' # Example: '%kernel.logs_dir%/console/{filename}/{date}.log'

        # The name of the file handler factory to use.
        type:                 stream
        level:                DEBUG
        bubble:               true
        include_stacktraces:  false
        formatter:            null
        file_permission:      null
        use_locking:          false
        max_files:            0
        filename_format:      '{filename}-{date}'
        date_format:          Y-m-d

        # Extra options that can be used in custom handler factories.
        extra_options:        []

            # Examples:
            # my_option1:          'some value'
            # my_option2:          true

        # Enables configuring services with the use of an annotation, requires the Doctrine Annotation library.
        enable_annotations:   false

    # Configuration option used by both handlers.
    process_psr_3_messages:

        # Examples:
        # - false
        # - { enabled: false }
        # - { date_format: Y-m-d, remove_used_context_fields: true }
        enabled:              true
        date_format:          ~
        remove_used_context_fields: ~

Enable the bundle in config/bundles.php by adding it to the array:

Bizkit\LoggableCommandBundle\BizkitLoggableCommandBundle::class => ['all' => true],

Usage

The bundle provides a way to log the output of a Symfony Command or Symfony Messenger's message handler into a dedicated file by dynamically creating a Monolog file handler & logger for each service. Supported file handlers are the stream & rotating_file handlers. To use other file handlers, a custom handler factory must be implemented & registered.

The output logger also uses a console handler to display the output inside a terminal. The stderr_threshold option can be used to set the log level at which the output is start being sent to the stderr stream instead of the stdout.

Other Monolog handlers can be added to the output logger as well as described in the dedicated section.

Command

The simplest way to enable output logging in a Symfony Command is by extending the LoggableCommand class. The output logger can be accessed through the $outputLogger property. By default, the name of the log file will be the snake cased version of the command name, e.g. app_my_loggable.

namespace App;

use Bizkit\LoggableCommandBundle\Command\LoggableCommand;

class MyLoggableCommand extends LoggableCommand
{
    protected static $defaultName = 'app:my-loggable';

    protected function execute(InputInterface $input, OutputInterface $output): int
    {
        $this->outputLogger->debug('Debug');
        $this->outputLogger->notice('Notice');

        // ...
    }
}

Instead of extending the LoggableCommand class, you can also use the LoggableOutputTrait with the LoggableOutputInterface. This is useful when you have a custom base command class.

namespace App;

use Bizkit\LoggableCommandBundle\LoggableOutput\LoggableOutputInterface;
use Bizkit\LoggableCommandBundle\LoggableOutput\LoggableOutputTrait;

class MyLoggableCommand extends MyBaseCommand implements LoggableOutputInterface
{
    use LoggableOutputTrait;

    protected function execute(InputInterface $input, OutputInterface $output): int
    {
        // ...
    }
}

Message handler

Output logging can also be used with Symfony Messenger's message handlers by implementing the LoggableOutputInterface. The name of the log file will be the snake cased version of the classname, e.g. my_message_handler. A custom name can be provided by implementing the NamedLoggableOutputInterface instead.

namespace App;

use Bizkit\LoggableCommandBundle\LoggableOutput\LoggableOutputTrait;
use Bizkit\LoggableCommandBundle\LoggableOutput\NamedLoggableOutputInterface;
use Symfony\Component\Messenger\Handler\MessageHandlerInterface;

class MyMessageHandler implements MessageHandlerInterface, NamedLoggableOutputInterface
{
    use LoggableOutputTrait;

    public function __invoke(MyMessage $myMessage): void
    {
        $this->outputLogger->error('Error');
        $this->outputLogger->info('Info');
    }

    public function getOutputLogName(): string
    {
        return 'my_log_name';
    }
}

PHP 8 attribute

The default configuration can be overridden for each individual command or message handler by using the LoggableOutput PHP attribute. Among other things, it allows you to change which Monolog file handler is used by the output logger.

namespace App;

use Bizkit\LoggableCommandBundle\Command\LoggableCommand;
use Bizkit\LoggableCommandBundle\ConfigurationProvider\Attribute\LoggableOutput;

#[LoggableOutput(filename: 'my_custom_name', type: 'rotating_file')]
class MyLoggableCommand extends LoggableCommand
{
    protected function execute(InputInterface $input, OutputInterface $output): int
    {
        // ...
    }
}

The PHP attribute can also be used as an alternative way to provide a custom name for the log file, in which case implementing the NamedLoggableOutputInterface is not necessary.

namespace App;

use Bizkit\LoggableCommandBundle\ConfigurationProvider\Attribute\LoggableOutput;
use Bizkit\LoggableCommandBundle\LoggableOutput\LoggableOutputInterface;
use Bizkit\LoggableCommandBundle\LoggableOutput\LoggableOutputTrait;
use Symfony\Component\Messenger\Handler\MessageHandlerInterface;

#[LoggableOutput(filename: 'my_log_name')]
class MyMessageHandler implements MessageHandlerInterface, LoggableOutputInterface
{
    use LoggableOutputTrait;

    public function __invoke(MyMessage $myMessage): void
    {
        // ...
    }
}

Attribute options are inherited from all parent classes that have the PHP attribute declared. In case both a parent & a child class have the same option defined, the one from the child class has precedence.

namespace App;

use Bizkit\LoggableCommandBundle\ConfigurationProvider\Attribute\LoggableOutput;
use Bizkit\LoggableCommandBundle\LoggableOutput\LoggableOutputInterface;
use Bizkit\LoggableCommandBundle\LoggableOutput\LoggableOutputTrait;
use Symfony\Component\Messenger\Handler\MessageHandlerInterface;

#[LoggableOutput(path: '%kernel.logs_dir%/messenger/{filename}.log')]
abstract class MyBaseMessageHandler implements MessageHandlerInterface, LoggableOutputInterface
{
    use LoggableOutputTrait;
}

#[LoggableOutput(filename: 'my_log_name')]
class MyMessageHandler extends MyBaseMessageHandler
{
    public function __invoke(MyMessage $myMessage): void
    {
        // ...
    }
}

Doctrine annotations

If you're using a version of PHP prior to 8, Doctrine annotations can be used instead of PHP attributes as a way to override the default configuration.

Require the Doctrine annotations library with Composer:
```
composer require doctrine/annotations
```

Enable annotations support in the configuration:

bizkit_loggable_command:
    file_handler_options:
        enable_annotations: true

The LoggableOutput PHP attribute also serves as the Doctrine annotation class.

namespace App;

use Bizkit\LoggableCommandBundle\Command\LoggableCommand;
use Bizkit\LoggableCommandBundle\ConfigurationProvider\Attribute\LoggableOutput;

/**
 * @LoggableOutput(filename="my_custom_name", type="rotating_file")
 */
class MyLoggableCommand extends LoggableCommand
{
    protected function execute(InputInterface $input, OutputInterface $output): int
    {
        // ...
    }
}

Annotation options are also inherited from all parent classes.

Adding other Monolog handlers to the output logger

To add other Monolog handlers to the output logger, in case of an inclusive channel list, add the Monolog channel defined with the channel_name option to their channels list.

monolog:
    handlers:
        sentry:
            type: sentry
            dsn: '%sentry_dsn%'
            channels: [ "loggable_output" ]

In case of an exclusive channel list, disable the auto-exclusion feature for that handler.

NOTE: In case of multiple output loggers, each output logger will use the same handler instance.

Monolog channel auto-exclusion

The Monolog channel used by the bundle is automatically excluded from all other Monolog handlers with an exclusive channel list. There's no need to manually add the channel to the list.

monolog:
    handlers:
        main:
            # ...
            channels: [ "!event" ] # the bundle's channel is excluded automatically, no need to add it manually

Disabling auto-exclusion

If you don't want the channel to be automatically excluded from a certain handler, add it to the channels list prefixed with !!.

monolog:
    handlers:
        main:
            # ...
            channels: [ "!event", "!!loggable_output" ] # this will prevent the channel from being auto-excluded

Handler factories

Handler factories are used to instantiate & configure the file handler used by the output logger.

Custom handler factories

To implement a custom handler factory all you need to do is create a service which implements the HandlerFactoryInterface interface.

namespace App;

use Bizkit\LoggableCommandBundle\HandlerFactory\HandlerFactoryInterface;

class CustomHandlerFactory implements HandlerFactoryInterface
{
    public function __invoke(array $handlerOptions): HandlerInterface
    {
        // configure & return a monolog handler
    }
}

Use the FQCN of the service in the configuration:

bizkit_loggable_command:
    file_handler_options:
        type: App\CustomHandlerFactory

If you are not using Symfony's autoconfigure feature or wish to use an alias in the configuration, tag the service with the bizkit_loggable_command.handler_factory tag.

App\CustomHandlerFactory:
    # Prevents the handler factory from being tagged twice,
    # once by the autoconfigure feature & once manually
    autoconfigure: false
    tags:
        - { name: bizkit_loggable_command.handler_factory, type: custom }

bizkit_loggable_command:
    file_handler_options:
        type: custom

To simplify the configuring of a handler factory the bundle comes with an AbstractHandlerFactory class which can be used to configure some common handler features such as the PSR 3 log message processor or a log formatter.

namespace App;

use Bizkit\LoggableCommandBundle\HandlerFactory\AbstractHandlerFactory;
use Monolog\Handler\HandlerInterface;

class CustomHandlerFactory extends AbstractHandlerFactory
{
    protected function getHandler(array $handlerOptions): HandlerInterface
    {
        // return a monolog handler
    }
}

Versioning

This project adheres to Semantic Versioning 2.0.0.

Reporting issues

Use the issue tracker to report any issues you might have.

License

See the LICENSE file for license rights and limitations (MIT).

bizkit / loggable-command-bundle

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