org.apache.hadoop.hbase.util.TestJSONMetricUtil.java Source code

Introduction

Here is the source code for org.apache.hadoop.hbase.util.TestJSONMetricUtil.java

Source

/**
 * 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.util;

import java.io.IOException;
import java.lang.management.GarbageCollectorMXBean;
import java.lang.management.ManagementFactory;
import java.util.Hashtable;
import java.util.List;

import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;
import javax.management.openmbean.CompositeData;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.testclassification.MiscTests;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.codehaus.jackson.JsonNode;
import org.codehaus.jackson.JsonProcessingException;
import org.junit.Test;
import org.junit.experimental.categories.Category;

@Category({ MiscTests.class, SmallTests.class })
public class TestJSONMetricUtil {

    private static final Log LOG = LogFactory.getLog(TestJSONMetricUtil.class);

    @Test
    public void testBuildHashtable() {
        String[] keys = { "type", "name" };
        String[] emptyKey = {};
        String[] values = { "MemoryPool", "Par Eden Space" };
        String[] values2 = { "MemoryPool", "Par Eden Space", "Test" };
        String[] emptyValue = {};
        Hashtable<String, String> properties = JSONMetricUtil.buldKeyValueTable(keys, values);
        Hashtable<String, String> nullObject = JSONMetricUtil.buldKeyValueTable(keys, values2);
        Hashtable<String, String> nullObject1 = JSONMetricUtil.buldKeyValueTable(keys, emptyValue);
        Hashtable<String, String> nullObject2 = JSONMetricUtil.buldKeyValueTable(emptyKey, values2);
        Hashtable<String, String> nullObject3 = JSONMetricUtil.buldKeyValueTable(emptyKey, emptyValue);
        assertEquals(properties.get("type"), values[0]);
        assertEquals(properties.get("name"), values[1]);
        assertEquals(nullObject, null);
        assertEquals(nullObject1, null);
        assertEquals(nullObject2, null);
        assertEquals(nullObject3, null);
    }

    @Test
    public void testSearchJson() throws JsonProcessingException, IOException {
        String jsonString = "{\"test\":[{\"data1\":100,\"data2\":\"hello\",\"data3\": [1 , 2 , 3]}, "
                + "{\"data4\":0}]}";
        JsonNode node = JSONMetricUtil.mappStringToJsonNode(jsonString);
        JsonNode r1 = JSONMetricUtil.searchJson(node, "data1");
        JsonNode r2 = JSONMetricUtil.searchJson(node, "data2");
        JsonNode r3 = JSONMetricUtil.searchJson(node, "data3");
        JsonNode r4 = JSONMetricUtil.searchJson(node, "data4");
        assertEquals(r1.getIntValue(), 100);
        assertEquals(r2.getTextValue(), "hello");
        assertEquals(r3.get(0).getIntValue(), 1);
        assertEquals(r4.getIntValue(), 0);
    }

    @Test
    public void testBuildObjectName() throws MalformedObjectNameException {
        String[] keys = { "type", "name" };
        String[] values = { "MemoryPool", "Par Eden Space" };
        Hashtable<String, String> properties = JSONMetricUtil.buldKeyValueTable(keys, values);
        ObjectName testObject = JSONMetricUtil.buildObjectName(JSONMetricUtil.JAVA_LANG_DOMAIN, properties);
        assertEquals(testObject.getDomain(), JSONMetricUtil.JAVA_LANG_DOMAIN);
        assertEquals(testObject.getKeyPropertyList(), properties);
    }

    @Test
    public void testGetLastGCInfo() {
        List<GarbageCollectorMXBean> gcBeans = ManagementFactory.getGarbageCollectorMXBeans();
        for (GarbageCollectorMXBean bean : gcBeans) {
            ObjectName on = bean.getObjectName();
            Object value = JSONMetricUtil.getValueFromMBean(on, "LastGcInfo");
            LOG.info("Collector Info: " + value);
            if (value != null && value instanceof CompositeData) {
                CompositeData cds = (CompositeData) value;
                assertNotNull(cds.get("duration"));
            }
        }
    }
}