hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestJSONMetricUtil.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.util;
  19
  20 import static org.junit.Assert.assertEquals;
  21 import static org.junit.Assert.assertNotNull;
  22 import static org.junit.Assert.assertNull;
  23
  24 import java.lang.management.GarbageCollectorMXBean;
  25 import java.lang.management.ManagementFactory;
  26 import java.util.Hashtable;
  27 import java.util.List;
  28 import java.util.Map;
  29 import javax.management.MalformedObjectNameException;
  30 import javax.management.ObjectName;
  31 import javax.management.openmbean.CompositeData;
  32 import org.apache.hadoop.hbase.HBaseClassTestRule;
  33 import org.apache.hadoop.hbase.testclassification.MiscTests;
  34 import org.apache.hadoop.hbase.testclassification.SmallTests;
  35 import org.junit.ClassRule;
  36 import org.junit.Test;
  37 import org.junit.experimental.categories.Category;
  38 import org.slf4j.Logger;
  39 import org.slf4j.LoggerFactory;
  40
  41 @Category({ MiscTests.class, SmallTests.class })
  42 public class TestJSONMetricUtil {
  43
  44   @ClassRule
  45   public static final HBaseClassTestRule CLASS_RULE =
  46     HBaseClassTestRule.forClass(TestJSONMetricUtil.class);
  47
  48   private static final Logger LOG = LoggerFactory.getLogger(TestJSONMetricUtil.class);
  49
  50   @Test
  51   public void testBuildHashtable() {
  52     String[] keys = { "type", "name" };
  53     String[] emptyKey = {};
  54     String[] values = { "MemoryPool", "Par Eden Space" };
  55     String[] values2 = { "MemoryPool", "Par Eden Space", "Test" };
  56     String[] emptyValue = {};
  57     Map<String, String> properties = JSONMetricUtil.buldKeyValueTable(keys, values);
  58     assertEquals(values[0], properties.get("type"));
  59     assertEquals(values[1], properties.get("name"));
  60
  61     assertNull(JSONMetricUtil.buldKeyValueTable(keys, values2));
  62     assertNull(JSONMetricUtil.buldKeyValueTable(keys, emptyValue));
  63     assertNull(JSONMetricUtil.buldKeyValueTable(emptyKey, values2));
  64     assertNull(JSONMetricUtil.buldKeyValueTable(emptyKey, emptyValue));
  65   }
  66
  67   @Test
  68   public void testBuildObjectName() throws MalformedObjectNameException {
  69     String[] keys = { "type", "name" };
  70     String[] values = { "MemoryPool", "Par Eden Space" };
  71     Hashtable<String, String> properties = JSONMetricUtil.buldKeyValueTable(keys, values);
  72     ObjectName testObject =
  73       JSONMetricUtil.buildObjectName(JSONMetricUtil.JAVA_LANG_DOMAIN, properties);
  74     assertEquals(JSONMetricUtil.JAVA_LANG_DOMAIN, testObject.getDomain());
  75     assertEquals(testObject.getKeyPropertyList(), properties);
  76   }
  77
  78   @Test
  79   public void testGetLastGCInfo() {
  80     List<GarbageCollectorMXBean> gcBeans = ManagementFactory.getGarbageCollectorMXBeans();
  81     for (GarbageCollectorMXBean bean : gcBeans) {
  82       ObjectName on = bean.getObjectName();
  83       Object value = JSONMetricUtil.getValueFromMBean(on, "LastGcInfo");
  84       LOG.info("Collector Info: " + value);
  85       if (value != null && value instanceof CompositeData) {
  86         CompositeData cds = (CompositeData) value;
  87         assertNotNull(cds.get("duration"));
  88       }
  89     }
  90   }
  91 }