| /* |
| * 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.client; |
| |
| import static java.util.stream.Collectors.toList; |
| import static org.apache.hadoop.hbase.client.AsyncNonMetaRegionLocator.MAX_CONCURRENT_LOCATE_REQUEST_PER_TABLE; |
| import static org.apache.hadoop.hbase.client.ConnectionUtils.isEmptyStartRow; |
| import static org.apache.hadoop.hbase.client.ConnectionUtils.isEmptyStopRow; |
| import static org.apache.hadoop.hbase.coprocessor.CoprocessorHost.REGION_COPROCESSOR_CONF_KEY; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.io.IOException; |
| import java.util.List; |
| import java.util.Optional; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import java.util.stream.IntStream; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hbase.HBaseClassTestRule; |
| import org.apache.hadoop.hbase.HBaseTestingUtil; |
| import org.apache.hadoop.hbase.HRegionLocation; |
| import org.apache.hadoop.hbase.RegionLocations; |
| import org.apache.hadoop.hbase.TableName; |
| import org.apache.hadoop.hbase.coprocessor.ObserverContext; |
| import org.apache.hadoop.hbase.coprocessor.RegionCoprocessor; |
| import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment; |
| import org.apache.hadoop.hbase.coprocessor.RegionObserver; |
| import org.apache.hadoop.hbase.regionserver.InternalScanner; |
| import org.apache.hadoop.hbase.security.User; |
| import org.apache.hadoop.hbase.testclassification.ClientTests; |
| import org.apache.hadoop.hbase.testclassification.MediumTests; |
| import org.apache.hadoop.hbase.util.Bytes; |
| import org.apache.hadoop.hbase.util.Threads; |
| import org.junit.AfterClass; |
| import org.junit.BeforeClass; |
| import org.junit.ClassRule; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| |
| import org.apache.hbase.thirdparty.com.google.common.io.Closeables; |
| |
| @Category({ MediumTests.class, ClientTests.class }) |
| public class TestAsyncNonMetaRegionLocatorConcurrenyLimit { |
| |
| @ClassRule |
| public static final HBaseClassTestRule CLASS_RULE = |
| HBaseClassTestRule.forClass(TestAsyncNonMetaRegionLocatorConcurrenyLimit.class); |
| |
| private static final HBaseTestingUtil TEST_UTIL = new HBaseTestingUtil(); |
| |
| private static TableName TABLE_NAME = TableName.valueOf("async"); |
| |
| private static byte[] FAMILY = Bytes.toBytes("cf"); |
| |
| private static AsyncConnectionImpl CONN; |
| |
| private static AsyncNonMetaRegionLocator LOCATOR; |
| |
| private static byte[][] SPLIT_KEYS; |
| |
| private static int MAX_ALLOWED = 2; |
| |
| private static AtomicInteger CONCURRENCY = new AtomicInteger(0); |
| |
| private static AtomicInteger MAX_CONCURRENCY = new AtomicInteger(0); |
| |
| public static final class CountingRegionObserver implements RegionCoprocessor, RegionObserver { |
| |
| @Override |
| public Optional<RegionObserver> getRegionObserver() { |
| return Optional.of(this); |
| } |
| |
| @Override |
| public boolean preScannerNext(ObserverContext<RegionCoprocessorEnvironment> c, |
| InternalScanner s, List<Result> result, int limit, boolean hasNext) throws IOException { |
| if (c.getEnvironment().getRegionInfo().isMetaRegion()) { |
| int concurrency = CONCURRENCY.incrementAndGet(); |
| for (;;) { |
| int max = MAX_CONCURRENCY.get(); |
| if (concurrency <= max) { |
| break; |
| } |
| if (MAX_CONCURRENCY.compareAndSet(max, concurrency)) { |
| break; |
| } |
| } |
| Threads.sleepWithoutInterrupt(10); |
| } |
| return hasNext; |
| } |
| |
| @Override |
| public boolean postScannerNext(ObserverContext<RegionCoprocessorEnvironment> c, |
| InternalScanner s, List<Result> result, int limit, boolean hasNext) throws IOException { |
| if (c.getEnvironment().getRegionInfo().isMetaRegion()) { |
| CONCURRENCY.decrementAndGet(); |
| } |
| return hasNext; |
| } |
| } |
| |
| @BeforeClass |
| public static void setUp() throws Exception { |
| Configuration conf = TEST_UTIL.getConfiguration(); |
| conf.set(REGION_COPROCESSOR_CONF_KEY, CountingRegionObserver.class.getName()); |
| conf.setInt(MAX_CONCURRENT_LOCATE_REQUEST_PER_TABLE, MAX_ALLOWED); |
| TEST_UTIL.startMiniCluster(3); |
| TEST_UTIL.getAdmin().balancerSwitch(false, true); |
| ConnectionRegistry registry = |
| ConnectionRegistryFactory.create(TEST_UTIL.getConfiguration(), User.getCurrent()); |
| CONN = new AsyncConnectionImpl(TEST_UTIL.getConfiguration(), registry, |
| registry.getClusterId().get(), null, User.getCurrent()); |
| LOCATOR = new AsyncNonMetaRegionLocator(CONN); |
| SPLIT_KEYS = IntStream.range(1, 256).mapToObj(i -> Bytes.toBytes(String.format("%02x", i))) |
| .toArray(byte[][]::new); |
| TEST_UTIL.createTable(TABLE_NAME, FAMILY, SPLIT_KEYS); |
| TEST_UTIL.waitTableAvailable(TABLE_NAME); |
| } |
| |
| @AfterClass |
| public static void tearDown() throws Exception { |
| Closeables.close(CONN, true); |
| TEST_UTIL.shutdownMiniCluster(); |
| } |
| |
| private void assertLocs(List<CompletableFuture<RegionLocations>> futures) |
| throws InterruptedException, ExecutionException { |
| assertEquals(256, futures.size()); |
| for (int i = 0; i < futures.size(); i++) { |
| HRegionLocation loc = futures.get(i).get().getDefaultRegionLocation(); |
| if (i == 0) { |
| assertTrue(isEmptyStartRow(loc.getRegion().getStartKey())); |
| } else { |
| assertEquals(String.format("%02x", i), Bytes.toString(loc.getRegion().getStartKey())); |
| } |
| if (i == futures.size() - 1) { |
| assertTrue(isEmptyStopRow(loc.getRegion().getEndKey())); |
| } else { |
| assertEquals(String.format("%02x", i + 1), Bytes.toString(loc.getRegion().getEndKey())); |
| } |
| } |
| } |
| |
| @Test |
| public void test() throws InterruptedException, ExecutionException { |
| List< |
| CompletableFuture< |
| RegionLocations>> futures = |
| IntStream.range(0, 256).mapToObj(i -> Bytes.toBytes(String.format("%02x", i))) |
| .map(r -> LOCATOR.getRegionLocations(TABLE_NAME, r, |
| RegionReplicaUtil.DEFAULT_REPLICA_ID, RegionLocateType.CURRENT, false)) |
| .collect(toList()); |
| assertLocs(futures); |
| assertTrue("max allowed is " + MAX_ALLOWED + " but actual is " + MAX_CONCURRENCY.get(), |
| MAX_CONCURRENCY.get() <= MAX_ALLOWED); |
| } |
| } |