| /* |
| * 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.api.java.operators.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; |
| |
| /** |
| * IT cases for lambda join functions. |
| */ |
| public class JoinITCase extends JavaProgramTestBase { |
| |
| private static final String EXPECTED_RESULT = "2,what's really\n" + |
| "2,up really\n" + |
| "1,hello not\n" + |
| "1,hello much\n"; |
| |
| 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.join(right).where(0).equalTo(0) |
| .with((t, s) -> new Tuple2<>(t.f0, t.f1 + " " + s.f1)); |
| joined.writeAsCsv(resultPath); |
| env.execute(); |
| } |
| |
| @Override |
| protected void postSubmit() throws Exception { |
| compareResultsByLinesInMemory(EXPECTED_RESULT, resultPath); |
| } |
| } |
| |