Github user zentol commented on a diff in the pull request:

    https://github.com/apache/flink/pull/3748#discussion_r143966527
  
    --- Diff: 
flink-connectors/flink-connector-cassandra/src/main/java/org/apache/flink/streaming/connectors/cassandra/CassandraRowSink.java
 ---
    @@ -0,0 +1,59 @@
    +/*
    + * 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 org.apache.flink.streaming.connectors.cassandra;
    +
    +import org.apache.flink.configuration.Configuration;
    +import org.apache.flink.types.Row;
    +
    +import com.datastax.driver.core.PreparedStatement;
    +import com.datastax.driver.core.ResultSet;
    +import com.google.common.util.concurrent.ListenableFuture;
    +
    +/**
    + * Flink Sink to save data into a Cassandra cluster.
    + *
    + */
    +public class CassandraRowSink extends CassandraSinkBase<Row, ResultSet> {
    --- End diff --
    
    you could extend AbstractCassandraTupleSink which would cover open(), 
send(), the constructor and fields.


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