/*
* 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.test.iterative;
import java.util.ArrayList;
import java.util.List;
import org.apache.flink.api.common.functions.MapFunction;
import org.apache.flink.api.java.DataSet;
import org.apache.flink.api.java.ExecutionEnvironment;
import org.apache.flink.api.java.io.LocalCollectionOutputFormat;
import org.apache.flink.api.java.operators.DeltaIteration;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.test.util.JavaProgramTestBase;
@SuppressWarnings("serial")
public class EmptyWorksetIterationITCase extends JavaProgramTestBase {
private List<Tuple2<Long, Long>> result = new ArrayList<Tuple2<Long, Long>>();
@Override
protected void testProgram() throws Exception {
ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple2<Long, Long>> input = env.generateSequence(1, 20).map(new Dupl());
DeltaIteration<Tuple2<Long, Long>, Tuple2<Long, Long>> iter = input.iterateDelta(input, 20, 0);
iter.closeWith(iter.getWorkset(), iter.getWorkset())
.output(new LocalCollectionOutputFormat<Tuple2<Long, Long>>(result));
env.execute();
}
public static final class Dupl implements MapFunction<Long, Tuple2<Long, Long>> {
@Override
public Tuple2<Long, Long> map(Long value) {
return new Tuple2<Long, Long>(value, value);
}
}
}