Online machine learning library on top of Storm
The perceptron topology is located at https://github.com/git2samus/storm-contrib/blob/ml-perceptron/storm-ml/
The class storm.ml.PerceptronDRPCTopology serves as a template for your particular implementation, currently the perceptron topology consists of two Storm topologies but in the future they'll be a single one wrapped on a specialized builder.
In order to use this topology you need to implement a spout that subclasses storm.ml.spout.BaseTrainingSpout for feeding your training data (storm.ml.spout.TrainingSpout is an example) the rest of the template remains the same.
You'll then have a DRPC implementation for the command "evaluate" which takes as a paramenter the string representation of a Double[] datatype, which answers your request with the evaluated result.
The current implementation requires a memcached instance/cluster to be running, it'll write on the key "weights" and you can download and install all the dependencies by running lein deps from leiningen.