hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestZKConnectionRegistry.java

   1 /*
   2  * Licensed to the Apache Software Foundation (ASF) under one
   3  * or more contributor license agreements.  See the NOTICE file
   4  * distributed with this work for additional information
   5  * regarding copyright ownership.  The ASF licenses this file
   6  * to you under the Apache License, Version 2.0 (the
   7  * "License"); you may not use this file except in compliance
   8  * with the License.  You may obtain a copy of the License at
   9  *
  10  *     http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  */
  18 package org.apache.hadoop.hbase.client;
  19
  20 import static org.hamcrest.CoreMatchers.instanceOf;
  21 import static org.hamcrest.MatcherAssert.assertThat;
  22 import static org.junit.Assert.assertEquals;
  23 import static org.junit.Assert.assertNotEquals;
  24 import static org.junit.Assert.assertNotNull;
  25 import static org.junit.Assert.assertNotSame;
  26 import static org.junit.Assert.fail;
  27
  28 import java.io.IOException;
  29 import java.util.concurrent.ExecutionException;
  30 import java.util.stream.IntStream;
  31 import org.apache.hadoop.conf.Configuration;
  32 import org.apache.hadoop.hbase.HBaseClassTestRule;
  33 import org.apache.hadoop.hbase.HBaseTestingUtil;
  34 import org.apache.hadoop.hbase.HConstants;
  35 import org.apache.hadoop.hbase.HRegionLocation;
  36 import org.apache.hadoop.hbase.RegionLocations;
  37 import org.apache.hadoop.hbase.TableName;
  38 import org.apache.hadoop.hbase.testclassification.ClientTests;
  39 import org.apache.hadoop.hbase.testclassification.MediumTests;
  40 import org.apache.hadoop.hbase.zookeeper.MiniZooKeeperCluster;
  41 import org.apache.hadoop.hbase.zookeeper.ReadOnlyZKClient;
  42 import org.junit.AfterClass;
  43 import org.junit.BeforeClass;
  44 import org.junit.ClassRule;
  45 import org.junit.Test;
  46 import org.junit.experimental.categories.Category;
  47 import org.slf4j.Logger;
  48 import org.slf4j.LoggerFactory;
  49
  50 import org.apache.hbase.thirdparty.com.google.common.io.Closeables;
  51
  52 @Category({ MediumTests.class, ClientTests.class })
  53 public class TestZKConnectionRegistry {
  54
  55   @ClassRule
  56   public static final HBaseClassTestRule CLASS_RULE =
  57     HBaseClassTestRule.forClass(TestZKConnectionRegistry.class);
  58
  59   static final Logger LOG = LoggerFactory.getLogger(TestZKConnectionRegistry.class);
  60   static final HBaseTestingUtil TEST_UTIL = new HBaseTestingUtil();
  61
  62   private static ZKConnectionRegistry REGISTRY;
  63
  64   @BeforeClass
  65   public static void setUp() throws Exception {
  66     TEST_UTIL.startMiniCluster(3);
  67     HBaseTestingUtil.setReplicas(TEST_UTIL.getAdmin(), TableName.META_TABLE_NAME, 3);
  68     REGISTRY = new ZKConnectionRegistry(TEST_UTIL.getConfiguration());
  69   }
  70
  71   @AfterClass
  72   public static void tearDown() throws Exception {
  73     Closeables.close(REGISTRY, true);
  74     TEST_UTIL.shutdownMiniCluster();
  75   }
  76
  77   @Test
  78   public void test() throws InterruptedException, ExecutionException, IOException {
  79     LOG.info("STARTED TEST");
  80     String clusterId = REGISTRY.getClusterId().get();
  81     String expectedClusterId = TEST_UTIL.getHBaseCluster().getMaster().getClusterId();
  82     assertEquals("Expected " + expectedClusterId + ", found=" + clusterId, expectedClusterId,
  83       clusterId);
  84     assertEquals(TEST_UTIL.getHBaseCluster().getMaster().getServerName(),
  85       REGISTRY.getActiveMaster().get());
  86     RegionReplicaTestHelper
  87       .waitUntilAllMetaReplicasAreReady(TEST_UTIL, REGISTRY);
  88     RegionLocations locs = REGISTRY.getMetaRegionLocations().get();
  89     assertEquals(3, locs.getRegionLocations().length);
  90     IntStream.range(0, 3).forEach(i -> {
  91       HRegionLocation loc = locs.getRegionLocation(i);
  92       assertNotNull("Replica " + i + " doesn't have location", loc);
  93       assertEquals(TableName.META_TABLE_NAME, loc.getRegion().getTable());
  94       assertEquals(i, loc.getRegion().getReplicaId());
  95     });
  96   }
  97
  98   @Test
  99   public void testIndependentZKConnections() throws IOException {
 100     try (ReadOnlyZKClient zk1 = REGISTRY.getZKClient()) {
 101       Configuration otherConf = new Configuration(TEST_UTIL.getConfiguration());
 102       otherConf.set(HConstants.ZOOKEEPER_QUORUM, MiniZooKeeperCluster.HOST);
 103       try (ZKConnectionRegistry otherRegistry = new ZKConnectionRegistry(otherConf)) {
 104         ReadOnlyZKClient zk2 = otherRegistry.getZKClient();
 105         assertNotSame("Using a different configuration / quorum should result in different " +
 106           "backing zk connection.", zk1, zk2);
 107         assertNotEquals(
 108           "Using a different configrution / quorum should be reflected in the zk connection.",
 109           zk1.getConnectString(), zk2.getConnectString());
 110       }
 111     } finally {
 112       LOG.info("DONE!");
 113     }
 114   }
 115
 116   @Test
 117   public void testNoMetaAvailable() throws InterruptedException {
 118     Configuration conf = new Configuration(TEST_UTIL.getConfiguration());
 119     conf.set("zookeeper.znode.metaserver", "whatever");
 120     try (ZKConnectionRegistry registry = new ZKConnectionRegistry(conf)) {
 121       try {
 122         registry.getMetaRegionLocations().get();
 123         fail("Should have failed since we set an incorrect meta znode prefix");
 124       } catch (ExecutionException e) {
 125         assertThat(e.getCause(), instanceOf(IOException.class));
 126       }
 127     }
 128   }
 129 }