| /* |
| * 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.beans.IntrospectionException; |
| import java.io.IOException; |
| import java.io.PrintWriter; |
| import java.io.StringWriter; |
| import java.lang.management.GarbageCollectorMXBean; |
| import java.lang.management.ManagementFactory; |
| import java.lang.management.MemoryPoolMXBean; |
| import java.lang.management.RuntimeMXBean; |
| import java.util.Hashtable; |
| import java.util.List; |
| import java.util.Set; |
| import javax.management.InstanceNotFoundException; |
| import javax.management.MBeanAttributeInfo; |
| import javax.management.MBeanInfo; |
| import javax.management.MBeanServer; |
| import javax.management.MalformedObjectNameException; |
| import javax.management.ObjectName; |
| import javax.management.ReflectionException; |
| import javax.management.openmbean.CompositeData; |
| import org.apache.yetus.audience.InterfaceAudience; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.hbase.thirdparty.com.google.common.base.Splitter; |
| import org.apache.hbase.thirdparty.com.google.common.collect.Iterables; |
| |
| @InterfaceAudience.Private |
| public final class JSONMetricUtil { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(JSONMetricUtil.class); |
| |
| private static MBeanServer mbServer = ManagementFactory.getPlatformMBeanServer(); |
| // MBeans ObjectName domain names |
| public static final String JAVA_LANG_DOMAIN = "java.lang"; |
| public static final String JAVA_NIO_DOMAIN = "java.nio"; |
| public static final String SUN_MGMT_DOMAIN = "com.sun.management"; |
| public static final String HADOOP_DOMAIN = "Hadoop"; |
| |
| // MBeans ObjectName properties key names |
| public static final String TYPE_KEY = "type"; |
| public static final String NAME_KEY = "name"; |
| public static final String SERVICE_KEY = "service"; |
| public static final String SUBSYSTEM_KEY = "sub"; |
| |
| /** |
| * Utility for getting metric values. Collection of static methods intended for easier access to |
| * metric values. |
| */ |
| private JSONMetricUtil() { |
| // Not to be called |
| } |
| |
| public static MBeanAttributeInfo[] getMBeanAttributeInfo(ObjectName bean) |
| throws IntrospectionException, InstanceNotFoundException, ReflectionException, |
| IntrospectionException, javax.management.IntrospectionException { |
| MBeanInfo mbinfo = mbServer.getMBeanInfo(bean); |
| return mbinfo.getAttributes(); |
| } |
| |
| public static Object getValueFromMBean(ObjectName bean, String attribute) { |
| Object value = null; |
| try { |
| value = mbServer.getAttribute(bean, attribute); |
| } catch (Exception e) { |
| LOG.error("Unable to get value from MBean= " + bean.toString() + "for attribute=" + attribute |
| + " " + e.getMessage()); |
| } |
| return value; |
| } |
| |
| /** |
| * Returns a subset of mbeans defined by qry. Modeled after DumpRegionServerMetrics#dumpMetrics. |
| * Example: String qry= "java.lang:type=Memory" |
| * @throws MalformedObjectNameException if json have bad format |
| * @throws IOException / |
| * @return String representation of json array. |
| */ |
| public static String dumpBeanToString(String qry) |
| throws MalformedObjectNameException, IOException { |
| StringWriter sw = new StringWriter(1024 * 100); // Guess this size |
| try (PrintWriter writer = new PrintWriter(sw)) { |
| JSONBean dumper = new JSONBean(); |
| try (JSONBean.Writer jsonBeanWriter = dumper.open(writer)) { |
| MBeanServer mbeanServer = ManagementFactory.getPlatformMBeanServer(); |
| jsonBeanWriter.write(mbeanServer, new ObjectName(qry), null, false); |
| } |
| } |
| sw.close(); |
| return sw.toString(); |
| } |
| |
| /** |
| * Method for building map used for constructing ObjectName. Mapping is done with arrays indices |
| * @param keys Map keys |
| * @param values Map values |
| * @return Map or null if arrays are empty * or have different number of elements |
| */ |
| @SuppressWarnings("JdkObsolete") // javax requires hashtable param for ObjectName constructor |
| public static Hashtable<String, String> buldKeyValueTable(String[] keys, String[] values) { |
| if (keys.length != values.length) { |
| LOG.error("keys and values arrays must be same size"); |
| return null; |
| } |
| if (keys.length == 0 || values.length == 0) { |
| LOG.error("keys and values arrays can not be empty;"); |
| return null; |
| } |
| Hashtable<String, String> table = new Hashtable<>(); |
| for (int i = 0; i < keys.length; i++) { |
| table.put(keys[i], values[i]); |
| } |
| return table; |
| } |
| |
| public static ObjectName buildObjectName(String pattern) throws MalformedObjectNameException { |
| return new ObjectName(pattern); |
| } |
| |
| public static ObjectName buildObjectName(String domain, Hashtable<String, String> keyValueTable) |
| throws MalformedObjectNameException { |
| return new ObjectName(domain, keyValueTable); |
| } |
| |
| public static Set<ObjectName> getRegistredMBeans(ObjectName name, MBeanServer mbs) { |
| return mbs.queryNames(name, null); |
| } |
| |
| public static String getProcessPID() { |
| return Iterables.get(Splitter.on('@').split(ManagementFactory.getRuntimeMXBean().getName()), 0); |
| } |
| |
| public static String getCommmand() throws MalformedObjectNameException, IOException { |
| RuntimeMXBean runtimeBean = ManagementFactory.getRuntimeMXBean(); |
| return runtimeBean.getSystemProperties().get("sun.java.command"); |
| } |
| |
| public static List<GarbageCollectorMXBean> getGcCollectorBeans() { |
| List<GarbageCollectorMXBean> gcBeans = ManagementFactory.getGarbageCollectorMXBeans(); |
| return gcBeans; |
| } |
| |
| public static long getLastGcDuration(ObjectName gcCollector) { |
| long lastGcDuration = 0; |
| Object lastGcInfo = getValueFromMBean(gcCollector, "LastGcInfo"); |
| if (lastGcInfo != null && lastGcInfo instanceof CompositeData) { |
| CompositeData cds = (CompositeData) lastGcInfo; |
| lastGcDuration = (long) cds.get("duration"); |
| } |
| return lastGcDuration; |
| } |
| |
| public static List<MemoryPoolMXBean> getMemoryPools() { |
| List<MemoryPoolMXBean> mPools = ManagementFactory.getMemoryPoolMXBeans(); |
| return mPools; |
| } |
| |
| public static float calcPercentage(long a, long b) { |
| if (a == 0 || b == 0) { |
| return 0; |
| } |
| return ((float) a / (float) b) * 100; |
| } |
| } |