| /* |
| * 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.pig.test; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.text.DecimalFormat; |
| import java.util.Iterator; |
| |
| import org.apache.pig.PigServer; |
| import org.apache.pig.data.Tuple; |
| import org.apache.pig.test.utils.TestHelper; |
| import org.junit.AfterClass; |
| import org.junit.Test; |
| |
| public class TestMapReduce2 { |
| |
| static MiniGenericCluster cluster = MiniGenericCluster.buildCluster(); |
| |
| private PigServer pig ; |
| |
| public TestMapReduce2() throws Throwable { |
| pig = new PigServer(cluster.getExecType(), cluster.getProperties()) ; |
| } |
| |
| @AfterClass |
| public static void oneTimeTearDown() throws Exception { |
| cluster.shutDown(); |
| } |
| |
| @Test |
| public void testUnion1() throws Exception { |
| File tmpFile1 = genDataSetFile(false, 30 ) ; |
| File tmpFile2 = genDataSetFile(false, 50 ) ; |
| pig.registerQuery("a = load '" |
| + Util.generateURI(tmpFile1.toString(), pig.getPigContext()) |
| + "'; "); |
| pig.registerQuery("b = load '" |
| + Util.generateURI(tmpFile2.toString(), pig.getPigContext()) |
| + "'; "); |
| pig.registerQuery("c = union a, b; ") ; |
| |
| verifyUnion( "c", 30 + 50 ); |
| } |
| |
| @Test |
| public void testUnion1WithNulls() throws Exception { |
| |
| File tmpFile1 = genDataSetFile(true, 30 ) ; |
| File tmpFile2 = genDataSetFile(true, 50 ) ; |
| pig.registerQuery("a = load '" |
| + Util.generateURI(tmpFile1.toString(), pig.getPigContext()) |
| + "'; "); |
| pig.registerQuery("b = load '" |
| + Util.generateURI(tmpFile2.toString(), pig.getPigContext()) |
| + "'; "); |
| pig.registerQuery("c = union a, b; "); |
| |
| verifyUnion( "c", 30 + 50 ); |
| } |
| |
| @Test |
| public void testUnion2() throws Exception { |
| |
| File tmpFile1 = genDataSetFile(false, 30) ; |
| File tmpFile2 = genDataSetFile(false, 50) ; |
| pig.registerQuery("a = load '" |
| + Util.generateURI(tmpFile1.toString(), pig.getPigContext()) |
| + "'; "); |
| pig.registerQuery("b = load '" |
| + Util.generateURI(tmpFile2.toString(), pig.getPigContext()) |
| + "'; "); |
| pig.registerQuery("a1 = foreach a generate $0, $1; ") ; |
| pig.registerQuery("b1 = foreach b generate $0, $1; ") ; |
| pig.registerQuery("c = union a1, b1; ") ; |
| |
| verifyUnion( "c", 30 + 50 ); |
| } |
| |
| @Test |
| public void testUnion2WithNulls() throws Exception { |
| File tmpFile1 = genDataSetFile(true, 30) ; |
| File tmpFile2 = genDataSetFile(true, 50) ; |
| pig.registerQuery("a = load '" |
| + Util.generateURI(tmpFile1.toString(), pig.getPigContext()) |
| + "'; "); |
| pig.registerQuery("b = load '" |
| + Util.generateURI(tmpFile2.toString(), pig.getPigContext()) |
| + "'; "); |
| pig.registerQuery("a1 = foreach a generate $0, $1; ") ; |
| pig.registerQuery("b1 = foreach b generate $0, $1; ") ; |
| pig.registerQuery("c = union a1, b1; ") ; |
| |
| verifyUnion( "c", 30 + 50 ); |
| } |
| |
| //verifies results |
| public void verifyUnion(String id, int actualCount ) throws Exception { |
| |
| Iterator<Tuple> it = pig.openIterator(id); |
| Tuple t = null ; |
| int count = 0 ; |
| |
| while(it.hasNext()) { |
| t = it.next() ; |
| System.out.println(count + ":" + t) ; |
| count++ ; |
| } |
| |
| assertEquals(count, actualCount); |
| } |
| |
| |
| /*** |
| * For generating a sample dataset |
| */ |
| private File genDataSetFile(boolean hasNulls, int dataLength ) throws IOException { |
| |
| String[][] data = new String[dataLength][] ; |
| |
| DecimalFormat formatter = new DecimalFormat("0000000"); |
| |
| if ( hasNulls == true ) { |
| |
| for (int i = 0; i < dataLength; i++) { |
| |
| data[i] = new String[2] ; |
| if ( i % 7 == 0 ) { |
| data[i][0] = ""; |
| data[i][1] = formatter.format(dataLength - i); |
| |
| } else if ( i % 10 ==0 ) { |
| |
| data[i][0] = formatter.format(i % 10); |
| data[i][1] = ""; |
| |
| } else if ( i % 13 == 0 ) { |
| |
| data[i][0] = ""; |
| data[i][1] = ""; |
| |
| } else { |
| data[i][0] = formatter.format(i % 10); |
| data[i][1] = formatter.format(dataLength - i); |
| } |
| } |
| |
| } else { |
| |
| |
| for (int i = 0; i < dataLength; i++) { |
| data[i] = new String[2] ; |
| data[i][0] = formatter.format(i % 10); |
| data[i][1] = formatter.format(dataLength - i); |
| } |
| |
| } |
| File tmpFile = TestHelper.createTempFile(data) ; |
| tmpFile.deleteOnExit(); |
| return tmpFile; |
| } |
| } |