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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
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package org.apache.hadoop.hbase.coprocessor;
import java.io.IOException;
import junit.framework.TestCase;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.Coprocessor;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HBaseTestingUtility;
import org.apache.hadoop.hbase.HColumnDescriptor;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.SmallTests;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.client.Durability;
import org.apache.hadoop.hbase.regionserver.HRegion;
import org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost;
import org.apache.hadoop.hbase.regionserver.wal.WALEdit;
import org.apache.hadoop.hbase.util.Bytes;
import org.junit.experimental.categories.Category;
@Category(SmallTests.class)
public class TestRegionObserverStacking extends TestCase {
private static HBaseTestingUtility TEST_UTIL
= new HBaseTestingUtility();
static final Path DIR = TEST_UTIL.getDataTestDir();
public static class ObserverA extends BaseRegionObserver {
long id;
@Override
public void postPut(final ObserverContext<RegionCoprocessorEnvironment> c,
final Put put, final WALEdit edit,
final Durability durability)
throws IOException {
id = System.currentTimeMillis();
try {
Thread.sleep(10);
} catch (InterruptedException ex) {
}
}
}
public static class ObserverB extends BaseRegionObserver {
long id;
@Override
public void postPut(final ObserverContext<RegionCoprocessorEnvironment> c,
final Put put, final WALEdit edit,
final Durability durability)
throws IOException {
id = System.currentTimeMillis();
try {
Thread.sleep(10);
} catch (InterruptedException ex) {
}
}
}
public static class ObserverC extends BaseRegionObserver {
long id;
@Override
public void postPut(final ObserverContext<RegionCoprocessorEnvironment> c,
final Put put, final WALEdit edit,
final Durability durability)
throws IOException {
id = System.currentTimeMillis();
try {
Thread.sleep(10);
} catch (InterruptedException ex) {
}
}
}
HRegion initHRegion (byte [] tableName, String callingMethod,
Configuration conf, byte [] ... families) throws IOException {
HTableDescriptor htd = new HTableDescriptor(TableName.valueOf(tableName));
for(byte [] family : families) {
htd.addFamily(new HColumnDescriptor(family));
}
HRegionInfo info = new HRegionInfo(htd.getTableName(), null, null, false);
Path path = new Path(DIR + callingMethod);
HRegion r = HRegion.createHRegion(info, path, conf, htd);
// this following piece is a hack. currently a coprocessorHost
// is secretly loaded at OpenRegionHandler. we don't really
// start a region server here, so just manually create cphost
// and set it to region.
RegionCoprocessorHost host = new RegionCoprocessorHost(r, null, conf);
r.setCoprocessorHost(host);
return r;
}
public void testRegionObserverStacking() throws Exception {
byte[] ROW = Bytes.toBytes("testRow");
byte[] TABLE = Bytes.toBytes(this.getClass().getSimpleName());
byte[] A = Bytes.toBytes("A");
byte[][] FAMILIES = new byte[][] { A } ;
Configuration conf = HBaseConfiguration.create();
HRegion region = initHRegion(TABLE, getClass().getName(),
conf, FAMILIES);
RegionCoprocessorHost h = region.getCoprocessorHost();
h.load(ObserverA.class, Coprocessor.PRIORITY_HIGHEST, conf);
h.load(ObserverB.class, Coprocessor.PRIORITY_USER, conf);
h.load(ObserverC.class, Coprocessor.PRIORITY_LOWEST, conf);
Put put = new Put(ROW);
put.add(A, A, A);
region.put(put);
Coprocessor c = h.findCoprocessor(ObserverA.class.getName());
long idA = ((ObserverA)c).id;
c = h.findCoprocessor(ObserverB.class.getName());
long idB = ((ObserverB)c).id;
c = h.findCoprocessor(ObserverC.class.getName());
long idC = ((ObserverC)c).id;
assertTrue(idA < idB);
assertTrue(idB < idC);
}
}