public interface ServingModelManager<U>
Implementations of this interface maintain, in memory, the current state of a model in the
serving layer. It is given a reference to a stream of updates during initialization,
and consumes models and updates from it, and updates in-memory state accordingly.
Called by the framework to initiate a continuous process of reading models, and reading
from the input topic and updating model state in memory, and issuing updates to the
update topic. This will be executed asynchronously and may block. Note that an exception
or error thrown from this method is fatal and shuts down processing.
updateIterator - iterator to read models from
hadoopConf - Hadoop context, which may be required for reading from HDFS