Package org.apache.hadoop.hbase.util

Class JSONMetricUtil

java.lang.Object

org.apache.hadoop.hbase.util.JSONMetricUtil

@Private
public final class JSONMetricUtil
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static final String	HADOOP_DOMAIN
static final String	JAVA_LANG_DOMAIN
static final String	JAVA_NIO_DOMAIN
private static final org.slf4j.Logger	LOG
private static MBeanServer	mbServer
static final String	NAME_KEY
static final String	SERVICE_KEY
static final String	SUBSYSTEM_KEY
static final String	SUN_MGMT_DOMAIN
static final String	TYPE_KEY

Constructor Summary

Constructors

Modifier	Constructor	Description
private	JSONMetricUtil()	Utility for getting metric values.

Method Summary

Modifier and Type	Method	Description
static ObjectName	buildObjectName(String pattern)
static ObjectName	buildObjectName(String domain, Hashtable<String,String> keyValueTable)
static Hashtable<String,String>	buldKeyValueTable(String[] keys, String[] values)	Method for building map used for constructing ObjectName.
static float	calcPercentage(long a, long b)
static String	dumpBeanToString(String qry)	Returns a subset of mbeans defined by qry.
static String	getCommmand()
static List<GarbageCollectorMXBean>	getGcCollectorBeans()
static long	getLastGcDuration(ObjectName gcCollector)
static MBeanAttributeInfo[]	getMBeanAttributeInfo(ObjectName bean)
static List<MemoryPoolMXBean>	getMemoryPools()
static String	getProcessPID()
static Set<ObjectName>	getRegistredMBeans(ObjectName name, MBeanServer mbs)
static Object	getValueFromMBean(ObjectName bean, String attribute)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

LOG

private static final org.slf4j.Logger LOG

mbServer

private static MBeanServer mbServer

JAVA_LANG_DOMAIN

public static final String JAVA_LANG_DOMAIN

See Also:

• Constant Field Values

JAVA_NIO_DOMAIN

public static final String JAVA_NIO_DOMAIN

See Also:

• Constant Field Values

SUN_MGMT_DOMAIN

public static final String SUN_MGMT_DOMAIN

See Also:

• Constant Field Values

HADOOP_DOMAIN

public static final String HADOOP_DOMAIN

See Also:

• Constant Field Values

TYPE_KEY

public static final String TYPE_KEY

See Also:

• Constant Field Values

NAME_KEY

public static final String NAME_KEY

See Also:

• Constant Field Values

SERVICE_KEY

public static final String SERVICE_KEY

See Also:

• Constant Field Values

SUBSYSTEM_KEY

public static final String SUBSYSTEM_KEY

See Also:

• Constant Field Values

Constructor Details

JSONMetricUtil

private JSONMetricUtil()

Utility for getting metric values. Collection of static methods intended for easier access to metric values.

Method Details

getMBeanAttributeInfo

public static MBeanAttributeInfo[] getMBeanAttributeInfo(ObjectName bean)
                                                  throws IntrospectionException,
InstanceNotFoundException,
ReflectionException,
IntrospectionException,
IntrospectionException

Throws:

IntrospectionException

InstanceNotFoundException

ReflectionException

IntrospectionException

IntrospectionException

getValueFromMBean

public static Object getValueFromMBean(ObjectName bean,
 String attribute)

dumpBeanToString

public static String dumpBeanToString(String qry)
                               throws MalformedObjectNameException,
IOException

Returns a subset of mbeans defined by qry. Modeled after DumpRegionServerMetrics#dumpMetrics. Example: String qry= "java.lang:type=Memory"

Returns:

String representation of json array.

Throws:

MalformedObjectNameException - if json have bad format

IOException - /

buldKeyValueTable

public static Hashtable<String,String> buldKeyValueTable(String[] keys,
 String[] values)

Method for building map used for constructing ObjectName. Mapping is done with arrays indices

Parameters:

keys - Map keys

values - Map values

Returns:

Map or null if arrays are empty or have different number of elements

buildObjectName

public static ObjectName buildObjectName(String pattern)
                                  throws MalformedObjectNameException

Throws:

MalformedObjectNameException

buildObjectName

public static ObjectName buildObjectName(String domain,
 Hashtable<String,String> keyValueTable)
                                  throws MalformedObjectNameException

Throws:

MalformedObjectNameException

getRegistredMBeans

public static Set<ObjectName> getRegistredMBeans(ObjectName name,
 MBeanServer mbs)

getProcessPID

public static String getProcessPID()

getCommmand

public static String getCommmand()
                          throws MalformedObjectNameException,
IOException

Throws:

MalformedObjectNameException

IOException

getGcCollectorBeans

public static List<GarbageCollectorMXBean> getGcCollectorBeans()

getLastGcDuration

public static long getLastGcDuration(ObjectName gcCollector)

getMemoryPools

public static List<MemoryPoolMXBean> getMemoryPools()

calcPercentage

public static float calcPercentage(long a,
 long b)