com.hmsonline.trident.cql.mappers.CqlTupleMapper Maven / Gradle / Ivy

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package com.hmsonline.trident.cql.mappers;

import storm.trident.tuple.TridentTuple;

import com.datastax.driver.core.Statement;

/**
 * The CqlTupleMapper interface is responsible
 * for defining the structure of mapping and retrieving tuples
 * into the Cassandra store.
 *
 * @param K the key to map and retrieve
 * @param V the value to map and retrieve
 * @author rlee
 */
public abstract interface CqlTupleMapper {
    public Statement map(K key, V value);

    public Statement map(TridentTuple tuple);

    public Statement retrieve(K key);
}