/**
* 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.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
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.BaseTestCase;
import org.apache.hadoop.zebra.io.BasicTable;
import org.apache.hadoop.zebra.io.TableInserter;
import org.apache.hadoop.zebra.io.TableScanner;
import org.apache.hadoop.zebra.io.BasicTable.Reader.RangeSplit;
import org.apache.hadoop.zebra.parser.ParseException;
import org.apache.hadoop.zebra.schema.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.backend.hadoop.datastorage.ConfigurationUtil;
import org.apache.pig.data.Tuple;
import org.apache.pig.test.MiniCluster;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
/**
* 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 TestGlobTableLoader extends BaseTestCase {
private static Path pathTable;
@BeforeClass
public static void setUp() throws Exception {
init();
pathTable = getTableFullPath("TestGlobTableLoader");
removeDir(pathTable);
BasicTable.Writer writer = new BasicTable.Writer(pathTable,
"m1:map(string)", "[m1#{a}]", 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);
Map<String, String> map = new HashMap<String, String>();
map.put("a", "x");
map.put("b", "y");
map.put("c", "z");
tuple.set(0, map);
try {
inserters[i].insert(new BytesWritable(("key" + i).getBytes()), tuple);
} catch (Exception e) {
System.out.println(e.getMessage());
}
}
}
for (int i = 0; i < numsInserters; i++) {
inserters[i].close();
}
writer.close();
}
@AfterClass
public static void tearDown() throws Exception {
pigServer.shutdown();
}
// @Test
public void test1() throws IOException, ParseException {
String projection = new String("m1#{b}");
BasicTable.Reader reader = new BasicTable.Reader(pathTable, conf);
reader.setProjection(projection);
// long totalBytes = reader.getStatus().getSize();
List<RangeSplit> splits = reader.rangeSplit(1);
reader.close();
reader = new BasicTable.Reader(pathTable, conf);
reader.setProjection(projection);
TableScanner scanner = reader.getScanner(splits.get(0), true);
BytesWritable key = new BytesWritable();
Tuple value = TypesUtils.createTuple(scanner.getSchema());
// HashMap<String, Object> mapval;
while (!scanner.atEnd()) {
scanner.getKey(key);
// Assert.assertEquals(key, new BytesWritable("key0".getBytes()));
scanner.getValue(value);
System.out.println("key = " + key + " value = " + value);
// mapval = (HashMap<String, Object>) value.get(0);
// Assert.assertEquals("x", mapval.get("a"));
// Assert.assertEquals(null, mapval.get("b"));
// Assert.assertEquals(null, mapval.get("c"));
scanner.advance();
}
reader.close();
}
@Test
public void testReader() throws ExecException, IOException {
//pathTable = new Path("/user/" + System.getenv("USER") + "/{TestGlobTableLoader}");
pathTable = getTableFullPath("{TestGlobTableLoader}");
String query = "records = LOAD '" + pathTable.toString()
+ "' USING org.apache.hadoop.zebra.pig.TableLoader('m1#{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);
}
}
}