/**
* 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.javaApiOperators.lambdas;
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.test.util.JavaProgramTestBase;
public class CrossITCase extends JavaProgramTestBase {
private static final String EXPECTED_RESULT = "2,hello not\n" +
"3,what's not\n" +
"3,up not\n" +
"2,hello much\n" +
"3,what's much\n" +
"3,up much\n" +
"3,hello really\n" +
"4,what's really\n" +
"4,up really";
private String resultPath;
@Override
protected void preSubmit() throws Exception {
resultPath = getTempDirPath("result");
}
@SuppressWarnings("unchecked")
@Override
protected void testProgram() throws Exception {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple2<Integer, String>> left = env.fromElements(
new Tuple2<Integer, String>(1, "hello"),
new Tuple2<Integer, String>(2, "what's"),
new Tuple2<Integer, String>(2, "up")
);
DataSet<Tuple2<Integer, String>> right = env.fromElements(
new Tuple2<Integer, String>(1, "not"),
new Tuple2<Integer, String>(1, "much"),
new Tuple2<Integer, String>(2, "really")
);
DataSet<Tuple2<Integer,String>> joined = left.cross(right)
.with((t,s) -> new Tuple2<Integer, String> (t.f0 + s.f0, t.f1 + " " + s.f1));
joined.writeAsCsv(resultPath);
env.execute();
}
@Override
protected void postSubmit() throws Exception {
compareResultsByLinesInMemory(EXPECTED_RESULT, resultPath);
}
}