/**
*
* 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.hbase.mapred;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.mockito.Matchers.anyObject;
import static org.mockito.Mockito.doAnswer;
import static org.mockito.Mockito.doReturn;
import static org.mockito.Mockito.doThrow;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.spy;
import java.io.IOException;
import java.util.Arrays;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.*;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.client.ResultScanner;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.exceptions.UnknownScannerException;
import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
import org.apache.hadoop.hbase.util.Bytes;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
/**
* This tests the TableInputFormat and its recovery semantics
*
*/
@Category(LargeTests.class)
public class TestTableInputFormat {
private static final Log LOG = LogFactory.getLog(TestTableInputFormat.class);
private final static HBaseTestingUtility UTIL = new HBaseTestingUtility();
static final byte[] FAMILY = Bytes.toBytes("family");
private static final byte[][] columns = new byte[][] { FAMILY };
@BeforeClass
public static void beforeClass() throws Exception {
UTIL.startMiniCluster();
}
@AfterClass
public static void afterClass() throws Exception {
UTIL.shutdownMiniCluster();
}
@Before
public void before() throws IOException {
LOG.info("before");
UTIL.ensureSomeRegionServersAvailable(1);
LOG.info("before done");
}
/**
* Setup a table with two rows and values.
*
* @param tableName
* @return
* @throws IOException
*/
public static HTable createTable(byte[] tableName) throws IOException {
HTable table = UTIL.createTable(tableName, FAMILY);
Put p = new Put("aaa".getBytes());
p.add(FAMILY, null, "value aaa".getBytes());
table.put(p);
p = new Put("bbb".getBytes());
p.add(FAMILY, null, "value bbb".getBytes());
table.put(p);
return table;
}
/**
* Verify that the result and key have expected values.
*
* @param r
* @param key
* @param expectedKey
* @param expectedValue
* @return
*/
static boolean checkResult(Result r, ImmutableBytesWritable key,
byte[] expectedKey, byte[] expectedValue) {
assertEquals(0, key.compareTo(expectedKey));
Map<byte[], byte[]> vals = r.getFamilyMap(FAMILY);
byte[] value = vals.values().iterator().next();
assertTrue(Arrays.equals(value, expectedValue));
return true; // if succeed
}
/**
* Create table data and run tests on specified htable using the
* o.a.h.hbase.mapred API.
*
* @param table
* @throws IOException
*/
static void runTestMapred(HTable table) throws IOException {
org.apache.hadoop.hbase.mapred.TableRecordReader trr =
new org.apache.hadoop.hbase.mapred.TableRecordReader();
trr.setStartRow("aaa".getBytes());
trr.setEndRow("zzz".getBytes());
trr.setHTable(table);
trr.setInputColumns(columns);
trr.init();
Result r = new Result();
ImmutableBytesWritable key = new ImmutableBytesWritable();
boolean more = trr.next(key, r);
assertTrue(more);
checkResult(r, key, "aaa".getBytes(), "value aaa".getBytes());
more = trr.next(key, r);
assertTrue(more);
checkResult(r, key, "bbb".getBytes(), "value bbb".getBytes());
// no more data
more = trr.next(key, r);
assertFalse(more);
}
/**
* Create table data and run tests on specified htable using the
* o.a.h.hbase.mapreduce API.
*
* @param table
* @throws IOException
* @throws InterruptedException
*/
static void runTestMapreduce(HTable table) throws IOException,
InterruptedException {
org.apache.hadoop.hbase.mapreduce.TableRecordReaderImpl trr =
new org.apache.hadoop.hbase.mapreduce.TableRecordReaderImpl();
Scan s = new Scan();
s.setStartRow("aaa".getBytes());
s.setStopRow("zzz".getBytes());
s.addFamily(FAMILY);
trr.setScan(s);
trr.setHTable(table);
trr.initialize(null, null);
Result r = new Result();
ImmutableBytesWritable key = new ImmutableBytesWritable();
boolean more = trr.nextKeyValue();
assertTrue(more);
key = trr.getCurrentKey();
r = trr.getCurrentValue();
checkResult(r, key, "aaa".getBytes(), "value aaa".getBytes());
more = trr.nextKeyValue();
assertTrue(more);
key = trr.getCurrentKey();
r = trr.getCurrentValue();
checkResult(r, key, "bbb".getBytes(), "value bbb".getBytes());
// no more data
more = trr.nextKeyValue();
assertFalse(more);
}
/**
* Create a table that IOE's on first scanner next call
*
* @throws IOException
*/
static HTable createIOEScannerTable(byte[] name, final int failCnt)
throws IOException {
// build up a mock scanner stuff to fail the first time
Answer<ResultScanner> a = new Answer<ResultScanner>() {
int cnt = 0;
@Override
public ResultScanner answer(InvocationOnMock invocation) throws Throwable {
// first invocation return the busted mock scanner
if (cnt++ < failCnt) {
// create mock ResultScanner that always fails.
Scan scan = mock(Scan.class);
doReturn("bogus".getBytes()).when(scan).getStartRow(); // avoid npe
ResultScanner scanner = mock(ResultScanner.class);
// simulate TimeoutException / IOException
doThrow(new IOException("Injected exception")).when(scanner).next();
return scanner;
}
// otherwise return the real scanner.
return (ResultScanner) invocation.callRealMethod();
}
};
HTable htable = spy(createTable(name));
doAnswer(a).when(htable).getScanner((Scan) anyObject());
return htable;
}
/**
* Create a table that throws a DoNoRetryIOException on first scanner next
* call
*
* @throws IOException
*/
static HTable createDNRIOEScannerTable(byte[] name, final int failCnt)
throws IOException {
// build up a mock scanner stuff to fail the first time
Answer<ResultScanner> a = new Answer<ResultScanner>() {
int cnt = 0;
@Override
public ResultScanner answer(InvocationOnMock invocation) throws Throwable {
// first invocation return the busted mock scanner
if (cnt++ < failCnt) {
// create mock ResultScanner that always fails.
Scan scan = mock(Scan.class);
doReturn("bogus".getBytes()).when(scan).getStartRow(); // avoid npe
ResultScanner scanner = mock(ResultScanner.class);
invocation.callRealMethod(); // simulate UnknownScannerException
doThrow(
new UnknownScannerException("Injected simulated TimeoutException"))
.when(scanner).next();
return scanner;
}
// otherwise return the real scanner.
return (ResultScanner) invocation.callRealMethod();
}
};
HTable htable = spy(createTable(name));
doAnswer(a).when(htable).getScanner((Scan) anyObject());
return htable;
}
/**
* Run test assuming no errors using mapred api.
*
* @throws IOException
*/
@Test
public void testTableRecordReader() throws IOException {
HTable table = createTable("table1".getBytes());
runTestMapred(table);
}
/**
* Run test assuming Scanner IOException failure using mapred api,
*
* @throws IOException
*/
@Test
public void testTableRecordReaderScannerFail() throws IOException {
HTable htable = createIOEScannerTable("table2".getBytes(), 1);
runTestMapred(htable);
}
/**
* Run test assuming Scanner IOException failure using mapred api,
*
* @throws IOException
*/
@Test(expected = IOException.class)
public void testTableRecordReaderScannerFailTwice() throws IOException {
HTable htable = createIOEScannerTable("table3".getBytes(), 2);
runTestMapred(htable);
}
/**
* Run test assuming UnknownScannerException (which is a type of
* DoNotRetryIOException) using mapred api.
*
* @throws org.apache.hadoop.hbase.exceptions.DoNotRetryIOException
*/
@Test
public void testTableRecordReaderScannerTimeout() throws IOException {
HTable htable = createDNRIOEScannerTable("table4".getBytes(), 1);
runTestMapred(htable);
}
/**
* Run test assuming UnknownScannerException (which is a type of
* DoNotRetryIOException) using mapred api.
*
* @throws org.apache.hadoop.hbase.exceptions.DoNotRetryIOException
*/
@Test(expected = org.apache.hadoop.hbase.exceptions.DoNotRetryIOException.class)
public void testTableRecordReaderScannerTimeoutTwice() throws IOException {
HTable htable = createDNRIOEScannerTable("table5".getBytes(), 2);
runTestMapred(htable);
}
/**
* Run test assuming no errors using newer mapreduce api
*
* @throws IOException
* @throws InterruptedException
*/
@Test
public void testTableRecordReaderMapreduce() throws IOException,
InterruptedException {
HTable table = createTable("table1-mr".getBytes());
runTestMapreduce(table);
}
/**
* Run test assuming Scanner IOException failure using newer mapreduce api
*
* @throws IOException
* @throws InterruptedException
*/
@Test
public void testTableRecordReaderScannerFailMapreduce() throws IOException,
InterruptedException {
HTable htable = createIOEScannerTable("table2-mr".getBytes(), 1);
runTestMapreduce(htable);
}
/**
* Run test assuming Scanner IOException failure using newer mapreduce api
*
* @throws IOException
* @throws InterruptedException
*/
@Test(expected = IOException.class)
public void testTableRecordReaderScannerFailMapreduceTwice() throws IOException,
InterruptedException {
HTable htable = createIOEScannerTable("table3-mr".getBytes(), 2);
runTestMapreduce(htable);
}
/**
* Run test assuming UnknownScannerException (which is a type of
* DoNotRetryIOException) using newer mapreduce api
*
* @throws InterruptedException
* @throws org.apache.hadoop.hbase.exceptions.DoNotRetryIOException
*/
@Test
public void testTableRecordReaderScannerTimeoutMapreduce()
throws IOException, InterruptedException {
HTable htable = createDNRIOEScannerTable("table4-mr".getBytes(), 1);
runTestMapreduce(htable);
}
/**
* Run test assuming UnknownScannerException (which is a type of
* DoNotRetryIOException) using newer mapreduce api
*
* @throws InterruptedException
* @throws org.apache.hadoop.hbase.exceptions.DoNotRetryIOException
*/
@Test(expected = org.apache.hadoop.hbase.exceptions.DoNotRetryIOException.class)
public void testTableRecordReaderScannerTimeoutMapreduceTwice()
throws IOException, InterruptedException {
HTable htable = createDNRIOEScannerTable("table5-mr".getBytes(), 2);
runTestMapreduce(htable);
}
}