Examples with DataSet org.apache.flink.api.java.DataSet used on opensource projects

Example 56 with DataSet

use of org.apache.flink.api.java.DataSet in project flink by apache.

the class BatchPojoExample method main.

public static void main(String[] args) throws Exception {
    ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
    env.setParallelism(1);
    List<Pojo> customCassandraAnnotatedPojos = IntStream.range(0, 20).mapToObj(x -> new Pojo(UUID.randomUUID().toString(), x, 0)).collect(Collectors.toList());
    DataSet<Pojo> dataSet = env.fromCollection(customCassandraAnnotatedPojos);
    ClusterBuilder clusterBuilder = new ClusterBuilder() {

        private static final long serialVersionUID = -1754532803757154795L;

        @Override
        protected Cluster buildCluster(Cluster.Builder builder) {
            return builder.addContactPoints("127.0.0.1").build();
        }
    };
    dataSet.output(new CassandraPojoOutputFormat<>(clusterBuilder, Pojo.class, () -> new Mapper.Option[] { Mapper.Option.saveNullFields(true) }));
    env.execute("Write");
    /*
         *	This is for the purpose of showing an example of creating a DataSet using CassandraPojoInputFormat.
         */
    DataSet<Pojo> inputDS = env.createInput(new CassandraPojoInputFormat<>(SELECT_QUERY, clusterBuilder, Pojo.class, () -> new Mapper.Option[] { Mapper.Option.consistencyLevel(ConsistencyLevel.ANY) }));
    inputDS.print();
}