HTTP caching Symfony2 - how to give fresh data?

Question

symfony

Symfony2 uses ESI to cache chunks of code. We can set a max-age for a chunk and it will be cached for a certain amount of time. For example, one hour.
But how to give fresh data if it was updated after 5 minutes? The user will still receive them only after an hour? Is there any solution?

Answer 1

1) on an event, bang the cache in the storage, so that it gets useful for the update
2) etag