get function

[Samy CHBINOU]

In kafka there is a Subscribe API to be notified of incoming message 
values from a topic. I didn't see a Get(key, topic) function. I mean a 
Get function to retreive a value from a key inside a topic. Isn't this 
feature implemented? (Like in Redis). If it doesn't exists, do you think 
is is easy to implement?
Best Regard