Yii2: Proposal: Have you thought about using monolog as logger?

[antonmarin]

Monolog used by many frameworks. Have you thought about using monolog instead own logger implementation?

P.S. I know about yii2-monolog extension. I mean core usage

[samdark]

I'm OK with replacing some implementations with better components. I haven't really compared Monolog to our implementation in detail. What are cons and pros?

[antonmarin]

Pros:

• PSR3
• [Many handlers] (https://github.com/Seldaek/monolog/tree/master/src/Monolog/Handler)
• large community (49M installs)

Cons:

• PSR3 (differ interface). I think it's resolvable using Yii::info() shortcuts
• no alter to categories mechanics
• no exclude

[samdark]

Changing interface is possible in 2.1 so PSR-3 could be excluded from the list of cons, I think.

How about performance? Logging is very central application thing so if Monolog is significantly slower, it would be seen immediately.

[antonmarin]

Well, monolog logger is just an observer that throws messages to handlers. So it is closer to yii target then yii logger. I think it is suitable to use same dispatcher with some additions doing this we can achieve same performance and increase count of handlers.
Smth like:

• user call Dispatcher->log()
• Dispatcher collects messages
• application call flush
• Dispatcher send messages to logger

[samdark]

Sounds interesting to try to me. @yiisoft/core-developers thoughts?

[klimov-paul]

Support of Monolog is a matter of PSR-3 support. There was an issue about this already - #1676.

[klimov-paul]

Also there is related issue #7555.
It actually may happen some extension for Monolog support already exists.

[antonmarin]

As i said earlier, there is extension yii2-monolog. We are talking about core usage and profit of many handlers already implemented

[klimov-paul]

We are talking about core usage and profit of many handlers already implemented

Following this path, inside the core there should be support for PSR-3 compatible logger. Then monolog can be used as a particular one.
Including monolog as a a default log processor will create an external dependency, which contradicts #8452.

[samdark]

I think that would do. Overall Yii logging is implemented well so there's no intent dropping it in favor of anything to save maintenance cost.

[samdark]

I'll leave it open since I want to try creating PSR-3 target for our logger.

[samdark]

Here's an extension: https://github.com/samdark/yii2-psr-log-target

[samdark]

For 2.1 we may consider either making out logger PSR-3 compatible or replacing it with Monolog.

[antonmarin]

It is available to make Logger psr-compatible without breaking BC if Yii uses only shortcuts. What you think about it? I can prepare PR

[samdark]

@antonmarin I don't think you can make Yii logger PSR-compatible in 2.0.x because PSR-3 requires absence of non-standard log levels.

[antonmarin]

Users SHOULD NOT use a custom level without knowing for sure the current implementation supports it.

Sounds like recommendation and we can split logger to Logger and Profiler. @samdark what is your opinion about this way?

[samdark]

Right. It's a recommendation. Worth trying then...

[klimov-paul]

PR opened: #14611

[klimov-paul]

Resolved via #14611