spark-gremlin/src/test/java/org/apache/tinkerpop/gremlin/spark/structure/io/ExampleOutputRDD.java

/*
 * 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.tinkerpop.gremlin.spark.structure.io;

import org.apache.commons.configuration2.Configuration;
import org.apache.spark.api.java.JavaPairRDD;
import org.apache.tinkerpop.gremlin.hadoop.structure.io.VertexWritable;
import org.apache.tinkerpop.gremlin.structure.Vertex;

import java.util.Iterator;

import static org.junit.Assert.assertEquals;

/**
 * @author Marko A. Rodriguez (http://markorodriguez.com)
 */
public final class ExampleOutputRDD implements OutputRDD {

    static {
        InputOutputHelper.registerInputOutputPair(ExampleInputRDD.class, ExampleOutputRDD.class);
    }

    @Override
    public void writeGraphRDD(final Configuration configuration, final JavaPairRDD<Object, VertexWritable> graphRDD) {
        int totalAge = 0;
        final Iterator<VertexWritable> iterator = graphRDD.values().collect().iterator();
        while (iterator.hasNext()) {
            final Vertex vertex = iterator.next().get();
            if (vertex.label().equals("person"))
                totalAge = totalAge + vertex.<Integer>value("age");
        }
        assertEquals(123, totalAge);
    }
}