com.github.fhuss.storm.cassandra.query.SimpleCQLStatementTupleMapper Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of storm-cassandra Show documentation

Apache Storm API Implementation for Cassandra CQL

The newest version!

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package com.github.fhuss.storm.cassandra.query;

import backtype.storm.tuple.ITuple;
import com.datastax.driver.core.Session;
import com.datastax.driver.core.Statement;
import com.datastax.driver.core.querybuilder.Insert;

import java.io.Serializable;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Optional;

import static com.datastax.driver.core.querybuilder.QueryBuilder.insertInto;

/**
 * Default interface to map a {@link backtype.storm.tuple.ITuple} to a CQL {@link com.datastax.driver.core.Statement}.
 *
 * @author fhussonnois
 */
@FunctionalInterface
public interface SimpleCQLStatementTupleMapper extends CQLStatementTupleMapper, Serializable {

    /**
     * {@inheritDoc}
     */
    @Override
    default List map(Map conf, Session session, ITuple tuple) {
        return Arrays.asList(map(tuple));
    }

    /**
     * Maps a given tuple to a single CQL statements.
     *
     * @param tuple the incoming tuple to map.
     * @return a list of {@link com.datastax.driver.core.Statement}.
     */
    Statement map(ITuple tuple);
}