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TestMultiTableInputFormatBase.java
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TestMultiTableInputFormatBase.java
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/**
* 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.mapreduce;
import static org.apache.hadoop.hbase.client.Scan.SCAN_ATTRIBUTES_TABLE_NAME;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.atomic.AtomicInteger;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseClassTestRule;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.HRegionLocation;
import org.apache.hadoop.hbase.ServerName;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.Admin;
import org.apache.hadoop.hbase.client.AsyncConnection;
import org.apache.hadoop.hbase.client.BufferedMutator;
import org.apache.hadoop.hbase.client.BufferedMutatorParams;
import org.apache.hadoop.hbase.client.Connection;
import org.apache.hadoop.hbase.client.ConnectionUtils;
import org.apache.hadoop.hbase.client.RegionInfoBuilder;
import org.apache.hadoop.hbase.client.RegionLocator;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.client.Table;
import org.apache.hadoop.hbase.client.TableBuilder;
import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
import org.apache.hadoop.hbase.security.User;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.Pair;
import org.apache.hadoop.mapreduce.InputSplit;
import org.apache.hadoop.mapreduce.JobContext;
import org.apache.hadoop.mapreduce.RecordReader;
import org.apache.hadoop.mapreduce.TaskAttemptContext;
import org.junit.Assert;
import org.junit.ClassRule;
import org.junit.Rule;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.rules.TestName;
import org.mockito.Mockito;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
/**
* Tests of MultiTableInputFormatBase.
*/
@Category({SmallTests.class})
public class TestMultiTableInputFormatBase {
@ClassRule
public static final HBaseClassTestRule CLASS_RULE =
HBaseClassTestRule.forClass(TestMultiTableInputFormatBase.class);
@Rule public final TestName name = new TestName();
/**
* Test getSplits only puts up one Connection.
* In past it has put up many Connections. Each Connection setup comes with a fresh new cache
* so we have to do fresh hit on hbase:meta. Should only do one Connection when doing getSplits
* even if a MultiTableInputFormat.
* @throws IOException
*/
@Test
public void testMRSplitsConnectionCount() throws IOException {
// Make instance of MTIFB.
MultiTableInputFormatBase mtif = new MultiTableInputFormatBase() {
@Override
public RecordReader<ImmutableBytesWritable, Result> createRecordReader(InputSplit split,
TaskAttemptContext context)
throws IOException, InterruptedException {
return super.createRecordReader(split, context);
}
};
// Pass it a mocked JobContext. Make the JC return our Configuration.
// Load the Configuration so it returns our special Connection so we can interpolate
// canned responses.
JobContext mockedJobContext = Mockito.mock(JobContext.class);
Configuration c = HBaseConfiguration.create();
c.set(ConnectionUtils.HBASE_CLIENT_CONNECTION_IMPL, MRSplitsConnection.class.getName());
Mockito.when(mockedJobContext.getConfiguration()).thenReturn(c);
// Invent a bunch of scans. Have each Scan go against a different table so a good spread.
List<Scan> scans = new ArrayList<>();
for (int i = 0; i < 10; i++) {
Scan scan = new Scan();
String tableName = this.name.getMethodName() + i;
scan.setAttribute(SCAN_ATTRIBUTES_TABLE_NAME, Bytes.toBytes(tableName));
scans.add(scan);
}
mtif.setScans(scans);
// Get splits. Assert that that more than one.
List<InputSplit> splits = mtif.getSplits(mockedJobContext);
Assert.assertTrue(splits.size() > 0);
// Assert only one Connection was made (see the static counter we have in the mocked
// Connection MRSplitsConnection Constructor.
Assert.assertEquals(1, MRSplitsConnection.creations.get());
}
/**
* Connection to use above in Test.
*/
public static class MRSplitsConnection implements Connection {
private final Configuration configuration;
static final AtomicInteger creations = new AtomicInteger(0);
MRSplitsConnection (Configuration conf, ExecutorService pool, User user) throws IOException {
this.configuration = conf;
creations.incrementAndGet();
}
@Override
public void abort(String why, Throwable e) {
}
@Override
public boolean isAborted() {
return false;
}
@Override
public Configuration getConfiguration() {
return this.configuration;
}
@Override
public BufferedMutator getBufferedMutator(TableName tableName) throws IOException {
return null;
}
@Override
public BufferedMutator getBufferedMutator(BufferedMutatorParams params) throws IOException {
return null;
}
@Override
public RegionLocator getRegionLocator(final TableName tableName) throws IOException {
// Make up array of start keys. We start off w/ empty byte array.
final byte [][] startKeys = new byte [][] {HConstants.EMPTY_BYTE_ARRAY,
Bytes.toBytes("aaaa"), Bytes.toBytes("bbb"),
Bytes.toBytes("ccc"), Bytes.toBytes("ddd"), Bytes.toBytes("eee"),
Bytes.toBytes("fff"), Bytes.toBytes("ggg"), Bytes.toBytes("hhh"),
Bytes.toBytes("iii"), Bytes.toBytes("lll"), Bytes.toBytes("mmm"),
Bytes.toBytes("nnn"), Bytes.toBytes("ooo"), Bytes.toBytes("ppp"),
Bytes.toBytes("qqq"), Bytes.toBytes("rrr"), Bytes.toBytes("sss"),
Bytes.toBytes("ttt"), Bytes.toBytes("uuu"), Bytes.toBytes("vvv"),
Bytes.toBytes("zzz")};
// Make an array of end keys. We end with the empty byte array.
final byte [][] endKeys = new byte[][] {
Bytes.toBytes("aaaa"), Bytes.toBytes("bbb"),
Bytes.toBytes("ccc"), Bytes.toBytes("ddd"), Bytes.toBytes("eee"),
Bytes.toBytes("fff"), Bytes.toBytes("ggg"), Bytes.toBytes("hhh"),
Bytes.toBytes("iii"), Bytes.toBytes("lll"), Bytes.toBytes("mmm"),
Bytes.toBytes("nnn"), Bytes.toBytes("ooo"), Bytes.toBytes("ppp"),
Bytes.toBytes("qqq"), Bytes.toBytes("rrr"), Bytes.toBytes("sss"),
Bytes.toBytes("ttt"), Bytes.toBytes("uuu"), Bytes.toBytes("vvv"),
Bytes.toBytes("zzz"),
HConstants.EMPTY_BYTE_ARRAY};
// Now make a map of start keys to HRegionLocations. Let the server namber derive from
// the start key.
final Map<byte [], HRegionLocation> map =
new TreeMap<byte [], HRegionLocation>(Bytes.BYTES_COMPARATOR);
for (byte [] startKey: startKeys) {
HRegionLocation hrl = new HRegionLocation(
RegionInfoBuilder.newBuilder(tableName).setStartKey(startKey).build(),
ServerName.valueOf(Bytes.toString(startKey), 0, 0));
map.put(startKey, hrl);
}
// Get a list of the locations.
final List<HRegionLocation> locations = new ArrayList<HRegionLocation>(map.values());
// Now make a RegionLocator mock backed by the abpve map and list of locations.
RegionLocator mockedRegionLocator = Mockito.mock(RegionLocator.class);
Mockito.when(mockedRegionLocator.getRegionLocation(Mockito.any(byte [].class),
Mockito.anyBoolean())).
thenAnswer(new Answer<HRegionLocation>() {
@Override
public HRegionLocation answer(InvocationOnMock invocationOnMock) throws Throwable {
Object [] args = invocationOnMock.getArguments();
byte [] key = (byte [])args[0];
return map.get(key);
}
});
Mockito.when(mockedRegionLocator.getAllRegionLocations()).thenReturn(locations);
Mockito.when(mockedRegionLocator.getStartEndKeys()).
thenReturn(new Pair<byte [][], byte[][]>(startKeys, endKeys));
Mockito.when(mockedRegionLocator.getName()).thenReturn(tableName);
return mockedRegionLocator;
}
@Override
public Admin getAdmin() throws IOException {
Admin admin = Mockito.mock(Admin.class);
Mockito.when(admin.getConfiguration()).thenReturn(getConfiguration());
return admin;
}
@Override
public Table getTable(TableName tableName) throws IOException {
Table table = Mockito.mock(Table.class);
Mockito.when(table.getName()).thenReturn(tableName);
return table;
}
@Override
public void close() throws IOException {
}
@Override
public boolean isClosed() {
return false;
}
@Override
public TableBuilder getTableBuilder(TableName tableName, ExecutorService pool) {
return Mockito.mock(TableBuilder.class);
}
@Override
public void clearRegionLocationCache() {
}
@Override
public AsyncConnection toAsyncConnection() {
return null;
}
@Override
public String getClusterId() {
return null;
}
}
}