Deserializing a Spark Dstream

Question

I am trying to apply Drools Engine (Drools Fusion) over streaming data using Spark Streaming.

But I am unable to deserialize a variable of type JavaDStreamto fire rules over it.

It is showing comparision error between JavaDstream and Interger. Please suggest how to resolve this. Below is the Code

Main class

SparkConf conf = new SparkConf().setMaster("local[2]").setAppName("Spark Streaming");

    JavaStreamingContext jssc = new JavaStreamingContext(conf, new Duration(10000));

    JavaReceiverInputDStream<String> lines = jssc.socketTextStream("localhost", 8089);

    class splitFunc implements Function<String, Long> {
        public Long call(String x) { return Long.parseLong(x); }
        }


     JavaDStream<Long>  in_amount = lines.map(new splitFunc());

     insertEvent(entryPointStoreOne,new Sale(),in_amount);

Sale.java - FACTS

import org.apache.spark.streaming.api.java.JavaDStream;

public class Sale {

private JavaDStream<Long> amount;

public Sale (){ }

public void setAmount(JavaDStream<Long> amount)
{
    this.amount=amount;
}

public JavaDStream<Long> getAmount()
{
    return amount;
}

}

Drools Rules File

declare Sale
@role(event)
end


 rule "Store One - Has Passed its Sales Record"
 when
    $amount : Sale( amount > 1000 ) - FAILING HERE 
    from entry-point StoreOne      
  then
    System.out.println("Store One has passed its Sales Records");
  end