hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestRegionLocationCaching.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.junit.Assert.assertNotEquals;
  21 import static org.junit.Assert.assertTrue;
  22
  23 import java.io.IOException;
  24 import java.util.ArrayList;
  25 import java.util.List;
  26 import org.apache.hadoop.hbase.HBaseClassTestRule;
  27 import org.apache.hadoop.hbase.HBaseTestingUtility;
  28 import org.apache.hadoop.hbase.TableName;
  29 import org.apache.hadoop.hbase.testclassification.ClientTests;
  30 import org.apache.hadoop.hbase.testclassification.MediumTests;
  31 import org.apache.hadoop.hbase.util.Bytes;
  32 import org.junit.AfterClass;
  33 import org.junit.BeforeClass;
  34 import org.junit.ClassRule;
  35 import org.junit.Test;
  36 import org.junit.experimental.categories.Category;
  37
  38 @Category({MediumTests.class, ClientTests.class})
  39 public class TestRegionLocationCaching {
  40
  41   @ClassRule
  42   public static final HBaseClassTestRule CLASS_RULE =
  43       HBaseClassTestRule.forClass(TestRegionLocationCaching.class);
  44
  45   private final static HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
  46   private static int SLAVES = 1;
  47   private static TableName TABLE_NAME = TableName.valueOf("TestRegionLocationCaching");
  48   private static byte[] FAMILY = Bytes.toBytes("testFamily");
  49   private static byte[] QUALIFIER = Bytes.toBytes("testQualifier");
  50
  51   @BeforeClass
  52   public static void setUpBeforeClass() throws Exception {
  53     TEST_UTIL.startMiniCluster(SLAVES);
  54     TEST_UTIL.createTable(TABLE_NAME, new byte[][] { FAMILY });
  55     TEST_UTIL.waitUntilAllRegionsAssigned(TABLE_NAME);
  56   }
  57
  58   @AfterClass
  59   public static void tearDownAfterClass() throws Exception {
  60     TEST_UTIL.shutdownMiniCluster();
  61   }
  62
  63   @Test
  64   public void testCachingForHTableSinglePut() throws Exception {
  65     byte[] row = Bytes.toBytes("htable_single_put");
  66     byte[] value = Bytes.toBytes("value");
  67
  68     Put put = new Put(row);
  69     put.addColumn(FAMILY, QUALIFIER, value);
  70
  71     try (Table table = TEST_UTIL.getConnection().getTable(TABLE_NAME)) {
  72       table.put(put);
  73     }
  74
  75     checkRegionLocationIsCached(TABLE_NAME, TEST_UTIL.getConnection());
  76     checkExistence(TABLE_NAME, row, FAMILY, QUALIFIER);
  77   }
  78
  79   @Test
  80   public void testCachingForHTableMultiPut() throws Exception {
  81     List<Put> multiput = new ArrayList<Put>();
  82     for (int i = 0; i < 10; i++) {
  83       Put put = new Put(Bytes.toBytes("htable_multi_put" + i));
  84       byte[] value = Bytes.toBytes("value_" + i);
  85       put.addColumn(FAMILY, QUALIFIER, value);
  86       multiput.add(put);
  87     }
  88
  89     try (Table table = TEST_UTIL.getConnection().getTable(TABLE_NAME)) {
  90       table.put(multiput);
  91     }
  92     checkRegionLocationIsCached(TABLE_NAME, TEST_UTIL.getConnection());
  93     for (int i = 0; i < 10; i++) {
  94       checkExistence(TABLE_NAME, Bytes.toBytes("htable_multi_put" + i), FAMILY, QUALIFIER);
  95     }
  96   }
  97
  98   /**
  99    * Method to check whether the cached region location is non-empty for the given table. It repeats
 100    * the same check several times as clearing of cache by some async operations may not reflect
 101    * immediately.
 102    */
 103   private void checkRegionLocationIsCached(final TableName tableName, final Connection conn)
 104       throws InterruptedException, IOException {
 105     for (int count = 0; count < 50; count++) {
 106       int number = ((AsyncConnectionImpl) conn.toAsyncConnection()).getLocator()
 107         .getNumberOfCachedRegionLocations(tableName);
 108       assertNotEquals("Expected non-zero number of cached region locations", 0, number);
 109       Thread.sleep(100);
 110     }
 111   }
 112
 113   /**
 114    * Method to check whether the passed row exists in the given table
 115    */
 116   private static void checkExistence(final TableName tableName, final byte[] row,
 117       final byte[] family, final byte[] qualifier) throws Exception {
 118     // verify that the row exists
 119     Result r;
 120     Get get = new Get(row);
 121     get.addColumn(family, qualifier);
 122     int nbTry = 0;
 123     try (Table table = TEST_UTIL.getConnection().getTable(tableName)) {
 124       do {
 125         assertTrue("Failed to get row after " + nbTry + " tries", nbTry < 50);
 126         nbTry++;
 127         Thread.sleep(100);
 128         r = table.get(get);
 129       } while (r == null || r.getValue(family, qualifier) == null);
 130     }
 131   }
 132 }