Document the integration of the Lock component in the FrameworkBundle

[lyrixx]

I see there is an integration between the Lock component and the FrameworkBundle,
But I can find this documentation. I found this doc but it's only about the component alone.

It could be nice to get this doc ;)

Thanks

[javiereguiluz]

In 4.2 there's a new option related to this for flock. See symfony/symfony#26923

[jderusse]

When I write the original Lock documentation draft, I only write the Component part, because to be honest, I didn't find out where is the "FrameworkBundle" documentation.
We only documents options of framework's configuration (https://symfony.com/doc/3.4/reference/configuration/framework.html#lock) , and given lock's configuration contains only 1 option, this is not usefull at all.

At the time, we gave sample of configuration in the Full Default Configuration but this section as been removed

            # lock configuration
            lock:
                invoice: 'redis://localhost'
                report: semaphore
            # lock: ~
            # lock: 'flock'
            # lock: ['semaphore', 'redis://localhost']

I didn't want to invent a new thing, but at the time, I would have like to write something with:

• a sample of configuration (the simplest way to configure the component)
• a (or several) sample of advanced configurations
• how to inject it in my services (list of public aliases, and serviceId and how to use theme)

Any idea where should we put theme?

To be honest, I have the same issue with cache component. I never use framework bundle to create cacheItemPool (I configure theme in the DIC), because I never figured out how to customize theme (defining a namespace, or don't use serialization in ArrayCache) or create advanced Pools (like ChainPool) ;-)