[GitHub] Jicaar commented on a change in pull request #5876: [FLINK-9126] New CassandraPojoInputFormat to output data as a custom annotated Cassandra Pojo

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Jicaar commented on a change in pull request #5876: [FLINK-9126] New CassandraPojoInputFormat to output data as a custom annotated Cassandra Pojo
URL: https://github.com/apache/flink/pull/5876#discussion_r215059262
 
 

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 File path: flink-connectors/flink-connector-cassandra/src/test/java/org/apache/flink/batch/connectors/cassandra/example/BatchPojoExample.java
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+/*
+ * 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.batch.connectors.cassandra.example;
+
+import org.apache.flink.api.java.DataSet;
+import org.apache.flink.api.java.ExecutionEnvironment;
+import org.apache.flink.api.java.tuple.Tuple2;
+import org.apache.flink.batch.connectors.cassandra.CassandraPojoInputFormat;
+import org.apache.flink.batch.connectors.cassandra.CassandraTupleOutputFormat;
+import org.apache.flink.batch.connectors.cassandra.CustomCassandraAnnotatedPojo;
+import org.apache.flink.streaming.connectors.cassandra.ClusterBuilder;
+
+import com.datastax.driver.core.Cluster;
+
+import java.util.ArrayList;
+
+/**
+ * This is an example showing the to use the CassandraPojoInput-/CassandraOutputFormats in the Batch API.
+ *
+ * <p>The example assumes that a table exists in a local cassandra database, according to the following queries:
+ * CREATE KEYSPACE IF NOT EXISTS test WITH replication = {'class': 'SimpleStrategy', 'replication_factor': ‘1’};
+ * CREATE TABLE IF NOT EXISTS test.batches (number int, strings text, PRIMARY KEY(number, strings));
+ */
+public class BatchPojoExample {
+	private static final String INSERT_QUERY = "INSERT INTO test.batches (number, strings) VALUES (?,?);";
+	private static final String SELECT_QUERY = "SELECT number, strings FROM test.batches;";
+
+	/*
+	 *	table script: "CREATE TABLE test.batches (number int, strings text, PRIMARY KEY(number, strings));"
+	 */
+	public static void main(String[] args) throws Exception {
+
+		ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
+		env.setParallelism(1);
+
+		ArrayList<Tuple2<Integer, String>> collection = new ArrayList<>(20);
+		for (int i = 0; i < 20; i++) {
+			collection.add(new Tuple2<>(i, "string " + i));
+		}
+
+		DataSet<Tuple2<Integer, String>> dataSet = env.fromCollection(collection);
+
+		dataSet.output(new CassandraTupleOutputFormat<Tuple2<Integer, String>>(INSERT_QUERY, new ClusterBuilder() {
+			@Override
+			protected Cluster buildCluster(Cluster.Builder builder) {
+				return builder.addContactPoints("127.0.0.1").build();
+			}
+		}));
+
+		env.execute("Write");
+
+		/*DataSet<Tuple2<Integer, String>> inputDS = env
 
 Review comment:
   noted.

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