/**
* 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.hadoop.zebra.pig;
import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.BytesWritable;
import org.apache.hadoop.zebra.io.BasicTable;
import org.apache.hadoop.zebra.io.TableInserter;
import org.apache.hadoop.zebra.types.Schema;
import org.apache.hadoop.zebra.types.TypesUtils;
import org.apache.pig.ExecType;
import org.apache.pig.PigServer;
import org.apache.pig.backend.executionengine.ExecException;
import org.apache.pig.data.Tuple;
import org.apache.pig.test.MiniCluster;
import org.junit.Test;
import org.junit.BeforeClass;
import org.junit.AfterClass;
import junit.framework.Assert;
/**
* Note:
*
* Make sure you add the build/pig-0.1.0-dev-core.jar to the Classpath of the
* app/debug configuration, when run this from inside the Eclipse.
*
*/
public class TestTableLoader {
static protected ExecType execType = ExecType.MAPREDUCE;
static private MiniCluster cluster;
static protected PigServer pigServer;
static private Path pathTable;
@BeforeClass
public static void setUp() throws Exception {
if (System.getProperty("hadoop.log.dir") == null) {
String base = new File(".").getPath(); // getAbsolutePath();
System
.setProperty("hadoop.log.dir", new Path(base).toString() + "./logs");
}
if (execType == ExecType.MAPREDUCE) {
cluster = MiniCluster.buildCluster();
pigServer = new PigServer(ExecType.MAPREDUCE, cluster.getProperties());
} else {
pigServer = new PigServer(ExecType.LOCAL);
}
Configuration conf = new Configuration();
FileSystem fs = cluster.getFileSystem();
Path pathWorking = fs.getWorkingDirectory();
// pathTable = new Path(pathWorking, this.getClass().getSimpleName());
pathTable = new Path(pathWorking, "TestTableLoader");
System.out.println("pathTable =" + pathTable);
BasicTable.Writer writer = new BasicTable.Writer(pathTable,
"a:string,b,c:string,d,e,f,g", "[a,b,c];[d,e,f,g]", false, conf);
Schema schema = writer.getSchema();
Tuple tuple = TypesUtils.createTuple(schema);
final int numsBatch = 10;
final int numsInserters = 2;
TableInserter[] inserters = new TableInserter[numsInserters];
for (int i = 0; i < numsInserters; i++) {
inserters[i] = writer.getInserter("ins" + i, false);
}
for (int b = 0; b < numsBatch; b++) {
for (int i = 0; i < numsInserters; i++) {
TypesUtils.resetTuple(tuple);
for (int k = 0; k < tuple.size(); ++k) {
try {
tuple.set(k, b + "_" + i + "" + k);
} catch (ExecException e) {
e.printStackTrace();
}
}
inserters[i].insert(new BytesWritable(("key" + i).getBytes()), tuple);
}
}
for (int i = 0; i < numsInserters; i++) {
inserters[i].close();
}
}
@AfterClass
static public void tearDown() throws Exception {
pigServer.shutdown();
}
@Test
public void testReader1() throws ExecException, IOException {
String query = "records = LOAD '" + pathTable.toString()
+ "' USING org.apache.hadoop.zebra.pig.TableLoader('c, a');";
System.out.println(query);
pigServer.registerQuery(query);
Iterator<Tuple> it = pigServer.openIterator("records");
while (it.hasNext()) {
Tuple cur = it.next();
System.out.println(cur);
}
}
@Test
public void testReader2() throws ExecException, IOException {
String query = "records = LOAD '" + pathTable.toString()
+ "' USING org.apache.hadoop.zebra.pig.TableLoader('a, aa, b, c');";
System.out.println(query);
pigServer.registerQuery(query);
Iterator<Tuple> it = pigServer.openIterator("records");
int cnt = 0;
while (it.hasNext()) {
Tuple cur = it.next();
cnt++;
if (cnt == 1) {
Assert.assertEquals(4, cur.size());
Assert.assertEquals("0_00", cur.get(0));
Assert.assertEquals(null, cur.get(1));
Assert.assertEquals("0_01", cur.get(2));
Assert.assertEquals("0_02", cur.get(3));
}
System.out.println(cur);
}
}
}