| /* |
| * 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 java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.concurrent.TimeUnit; |
| 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.ServerName; |
| import org.apache.hadoop.hbase.Waiter; |
| import org.apache.hadoop.hbase.testclassification.ClientTests; |
| import org.apache.hadoop.hbase.testclassification.SmallTests; |
| import org.apache.hadoop.hbase.util.EnvironmentEdgeManager; |
| import org.junit.Assert; |
| import org.junit.ClassRule; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| import org.apache.hbase.thirdparty.com.google.common.util.concurrent.Uninterruptibles; |
| |
| @Category({ClientTests.class, SmallTests.class}) |
| public class TestMasterAddressRefresher { |
| |
| @ClassRule |
| public static final HBaseClassTestRule CLASS_RULE = |
| HBaseClassTestRule.forClass(TestMasterAddressRefresher.class); |
| |
| private class DummyMasterRegistry extends MasterRegistry { |
| |
| private final AtomicInteger getMastersCallCounter = new AtomicInteger(0); |
| private final List<Long> callTimeStamps = new ArrayList<>(); |
| |
| DummyMasterRegistry(Configuration conf) throws IOException { |
| super(conf); |
| } |
| |
| @Override |
| CompletableFuture<List<ServerName>> getMasters() { |
| getMastersCallCounter.incrementAndGet(); |
| callTimeStamps.add(EnvironmentEdgeManager.currentTime()); |
| return CompletableFuture.completedFuture(new ArrayList<>()); |
| } |
| |
| public int getMastersCount() { |
| return getMastersCallCounter.get(); |
| } |
| |
| public List<Long> getCallTimeStamps() { |
| return callTimeStamps; |
| } |
| } |
| |
| @Test |
| public void testPeriodicMasterEndPointRefresh() throws IOException { |
| Configuration conf = HBaseConfiguration.create(); |
| // Refresh every 1 second. |
| conf.setLong(MasterAddressRefresher.PERIODIC_REFRESH_INTERVAL_SECS, 1); |
| conf.setLong(MasterAddressRefresher.MIN_SECS_BETWEEN_REFRESHES, 0); |
| try (DummyMasterRegistry registry = new DummyMasterRegistry(conf)) { |
| // Wait for > 3 seconds to see that at least 3 getMasters() RPCs have been made. |
| Waiter.waitFor( |
| conf, 5000, (Waiter.Predicate<Exception>) () -> registry.getMastersCount() > 3); |
| } |
| } |
| |
| @Test |
| public void testDurationBetweenRefreshes() throws IOException { |
| Configuration conf = HBaseConfiguration.create(); |
| // Disable periodic refresh |
| conf.setLong(MasterAddressRefresher.PERIODIC_REFRESH_INTERVAL_SECS, Integer.MAX_VALUE); |
| // A minimum duration of 1s between refreshes |
| conf.setLong(MasterAddressRefresher.MIN_SECS_BETWEEN_REFRESHES, 1); |
| try (DummyMasterRegistry registry = new DummyMasterRegistry(conf)) { |
| // Issue a ton of manual refreshes. |
| for (int i = 0; i < 10000; i++) { |
| registry.masterAddressRefresher.refreshNow(); |
| Uninterruptibles.sleepUninterruptibly(1, TimeUnit.MILLISECONDS); |
| } |
| // Overall wait time is 10000 ms, so the number of requests should be <=10 |
| List<Long> callTimeStamps = registry.getCallTimeStamps(); |
| // Actual calls to getMasters() should be much lower than the refresh count. |
| Assert.assertTrue( |
| String.valueOf(registry.getMastersCount()), registry.getMastersCount() <= 20); |
| Assert.assertTrue(callTimeStamps.size() > 0); |
| // Verify that the delta between subsequent RPCs is at least 1sec as configured. |
| for (int i = 1; i < callTimeStamps.size() - 1; i++) { |
| long delta = callTimeStamps.get(i) - callTimeStamps.get(i - 1); |
| // Few ms cushion to account for any env jitter. |
| Assert.assertTrue(callTimeStamps.toString(), delta > 990); |
| } |
| } |
| |
| } |
| } |